修两套 UI 的横向溢出 + vivid 页脚把源码入口从社交排里分出来

溢出（两处，同一类成因）：
- vivid 时间线：短文正文用的是 .note .body 而不是 .prose，所以 c6eb0bb 给
  .prose 加的 overflow-wrap:anywhere 没覆盖到它，正文里的裸链接把列撑到 552px
  （视口 516）。补上 anywhere 而非 break-word——要参与 min-content 计算才压得住
- classic 时间线：.shell 的页边距在 640px 断点从 20px 收到 12px，而 .row-feed 的
  负出血要到 520px 才跟着收到 -12px，521~640 这段出血比父容器内边距多 4px，
  整页横向溢出。把出血断点对齐到 640px（桌面视觉不动）
- LinkCard 的 .lc-site 同样补 anywhere：主机名是最典型的不可断行长 token

vivid 页脚：源码仓库入口原先被 concat 进社交数组，和站主的 GitHub/X 排成同一行，
看起来像「又一个社交账号」。改成社交排只放账号（同 classic RightRail 的过滤），
源码图标与版权单独成 .foot-meta 压在页脚最底；样式写在 .foot a 之后，靠同特指度
的后者压掉页脚链接默认的强调色

.env.example

@@ -3,3 +3,20 @@ SecretAccessKey=
 S3Api="https://<account_id>.r2.cloudflarestorage.com"
 PublicURL=
 Bucket=
+
+# GitHub OAuth（评论登录）：https://github.com/settings/developers
+# 回调地址填 http://localhost:8080/api/auth/callback/github（线上换成正式域名）
+ONE_GITHUB_CLIENT_ID=
+ONE_GITHUB_CLIENT_SECRET=
+
+# Telegram 登录（Login Widget）：@BotFather 建 bot 拿 token，
+# 再用 /setdomain 把域名登记给 bot（本地开发填 localhost）
+ONE_TELEGRAM_BOT=
+ONE_TELEGRAM_BOT_TOKEN=
+
+# Google 登录：https://console.cloud.google.com/apis/credentials 建 OAuth 客户端，
+# 回调地址填 http://localhost:8080/api/auth/callback/google（线上换成正式域名）
+ONE_GOOGLE_CLIENT_ID=
+ONE_GOOGLE_CLIENT_SECRET=
+
+ONE_SECRET=# 任意字符串，用于加密

backend/go.mod

@@ -3,16 +3,18 @@ module oneblog
 go 1.24
 
 require (
+	github.com/aws/aws-sdk-go-v2 v1.47.1
+	github.com/aws/aws-sdk-go-v2/config v1.33.6
+	github.com/aws/aws-sdk-go-v2/credentials v1.20.6
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.113.4
 	github.com/lib/pq v1.10.9
 	github.com/yuin/goldmark v1.7.13
+	golang.org/x/text v0.21.0
 	modernc.org/sqlite v1.39.0
 )
 
 require (
-	github.com/aws/aws-sdk-go-v2 v1.47.1 // indirect
 	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.20 // indirect
-	github.com/aws/aws-sdk-go-v2/config v1.33.6 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.20.6 // indirect
 	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.20.1 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/configsources v1.5.4 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.8.4 // indirect
@@ -21,7 +23,6 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.11.5 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.14.4 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.20.4 // indirect
-	github.com/aws/aws-sdk-go-v2/service/s3 v1.113.4 // indirect
 	github.com/aws/aws-sdk-go-v2/service/signin v1.10.1 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sso v1.38.1 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.43.1 // indirect

backend/go.sum

@@ -59,6 +59,8 @@ golang.org/x/sync v0.15.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.34.0 h1:H5Y5sJ2L2JRdyv7ROF1he/lPdvFsd0mJHFw2ThKHxLA=
 golang.org/x/sys v0.34.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
 golang.org/x/tools v0.34.0 h1:qIpSLOxeCYGg9TrcJokLBG4KFA6d795g0xkBkiESGlo=
 golang.org/x/tools v0.34.0/go.mod h1:pAP9OwEaY1CAW3HOmg3hLZC5Z0CCmzjAF2UQMSqNARg=
 modernc.org/cc/v4 v4.26.2 h1:991HMkLjJzYBIfha6ECZdjrIYz2/1ayr+FL8GN+CNzM=

backend/internal/admin/api.go

@@ -13,26 +13,38 @@ import (
 	"io"
 	"mime/multipart"
 	"net/http"
+	"net/url"
 	"os"
+	"path"
 	"path/filepath"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
 
 	"oneblog/internal/config"
 	"oneblog/internal/httpx"
+	"oneblog/internal/hub"
+	"oneblog/internal/linkmeta"
 	"oneblog/internal/model"
 	"oneblog/internal/storage"
 	"oneblog/internal/store"
+	"oneblog/internal/thumbs"
 )
 
 type API struct {
 	Store    *store.Store
 	Cfg      *config.Config
 	Sessions *Sessions
+	// Hub 是评论变更广播（与公开 API 共享同一实例，main.go 装配）；
+	// 审核通过 / 后台删除评论时让前台打开着的页面即时刷新。
+	Hub *hub.Hub
 	// 文件上传的存储后端与公开域名（main.go 装配，两个 API 共享同一实例）
 	Blobs      storage.BlobStore
 	PublicBase string
+	// Thumbs 是缩略图磁盘缓存（main.go 装配）。删上传文件时顺手清掉它的
+	// 缩略图产物，否则已删图片会一直占着缓存。
+	Thumbs *thumbs.Store
 
 	loginOnce sync.Once
 	logins    *loginLimiter
@@ -70,8 +82,27 @@ func (a *API) Routes() http.Handler {
 	mux.HandleFunc("/api/admin/projects", a.guard(a.listProjects))
 	mux.HandleFunc("/api/admin/projects/", a.guard(a.projectByID))
 	mux.HandleFunc("/api/admin/files", a.guard(a.files))
+	mux.HandleFunc("/api/admin/files/import", a.guard(a.importFiles))
 	mux.HandleFunc("/api/admin/files/", a.guard(a.fileByID))
 	mux.HandleFunc("/api/admin/settings", a.guard(a.settings))
+	mux.HandleFunc("/api/admin/comments", a.guard(a.adminComments))
+	mux.HandleFunc("/api/admin/comments/", a.guard(a.adminCommentByID))
+	mux.HandleFunc("/api/admin/readers", a.guard(a.adminReaders))
+	mux.HandleFunc("/api/admin/readers/", a.guard(func(w http.ResponseWriter, r *http.Request) {
+		// 路径形如 /api/admin/readers/{id}/ban
+		rest := strings.Trim(strings.TrimPrefix(r.URL.Path, "/api/admin/readers/"), "/")
+		parts := strings.Split(rest, "/")
+		if len(parts) != 2 || parts[1] != "ban" {
+			httpx.NotFound(w)
+			return
+		}
+		id, err := strconv.ParseInt(parts[0], 10, 64)
+		if err != nil || id <= 0 {
+			httpx.BadRequest(w, "bad reader id")
+			return
+		}
+		a.adminReaderBan(w, r, id)
+	}))
 	return mux
 }
 
@@ -119,7 +150,7 @@ func (a *API) login(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	key := sourceKey(r)
-	if a.limiter().blocked(key) {
+	if a.limiter().Blocked(key) {
 		httpx.Error(w, http.StatusTooManyRequests, "失败次数过多，请 10 分钟后再试")
 		return
 	}
@@ -131,11 +162,11 @@ func (a *API) login(w http.ResponseWriter, r *http.Request) {
 	userOK := subtle.ConstantTimeCompare([]byte(in.Username), []byte(a.Cfg.AdminUser)) == 1
 	passOK := subtle.ConstantTimeCompare([]byte(in.Password), []byte(a.Cfg.AdminPass)) == 1
 	if !userOK || !passOK {
-		a.limiter().fail(key)
+		a.limiter().Add(key)
 		httpx.Unauthorized(w)
 		return
 	}
-	a.limiter().reset(key)
+	a.limiter().Reset(key)
 	token, exp := a.Sessions.Issue(a.Cfg.AdminUser)
 	http.SetCookie(w, &http.Cookie{
 		Name:     cookieName,
@@ -199,6 +230,8 @@ func (a *API) listPosts(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 		in.Status = store.NormalizeStatus(in.Status)
+		attachLinkCard(r.Context(), &in, nil)
+		autoMeta(&in, nil)
 		p, err := a.Store.Create(in)
 		if err != nil {
 			httpx.ServerError(w, err)
@@ -238,6 +271,16 @@ func (a *API) postByID(w http.ResponseWriter, r *http.Request) {
 		if in.Status != "" {
 			in.Status = store.NormalizeStatus(in.Status)
 		}
+		// 多读一次当前行：链接卡片没变就不必再打远端；摘要/封面自动
+		// 生成也以它为准——「新值与旧值都为空」才补，主动清空的保得住
+		var curCard *model.LinkCard
+		var curPost *model.Post
+		if cur, err := a.Store.Get(id); err == nil {
+			curCard = cur.LinkCard
+			curPost = &cur
+		}
+		attachLinkCard(r.Context(), &in, curCard)
+		autoMeta(&in, curPost)
 		p, err := a.Store.Update(id, in)
 		writeOne(w, p, err)
 	case http.MethodDelete:
@@ -693,6 +736,12 @@ func (a *API) storeOne(ctx context.Context, fh *multipart.FileHeader) (model.Fil
 	}
 
 	sum := hex.EncodeToString(hasher.Sum(nil))
+	return a.persistFile(ctx, fh.Filename, ext, mime, tmp.Name(), size, sum)
+}
+
+// persistFile 落库共享段：内容哈希做 key（同年月分目录）、去重复用、
+// Put 对象存储、建行。storeOne（本地上传）与 importOne（外链转存）共用。
+func (a *API) persistFile(ctx context.Context, name, ext, mime, tmpPath string, size int64, sum string) (model.File, error) {
 	key := fmt.Sprintf("%s/%s%s", time.Now().UTC().Format("2006/01"), sum[:12], ext)
 	// S3Api 端点带路径段时（如 .../oss），该段会折进对象 key——
 	// 数据库必须记录同样的完整 key，直链才不会 404
@@ -700,12 +749,15 @@ func (a *API) storeOne(ctx context.Context, fh *multipart.FileHeader) (model.Fil
 		key = p + "/" + key
 	}
 
-	// 内容去重：同一份内容只存一份，复用已有行
+	// 内容去重：同一份内容只存一份，复用已有行。
+	// URL 必须按当前存储配置重新解析——去重路径不走下面的 created 赋值，
+	// 漏了它转存替换会拿到空 URL（真实事故：正文图片链接被清空）。
 	if exist, err := a.Store.GetFileByKey(key); err == nil {
+		exist.URL = storage.FileURL(exist.Store, exist.Key, a.Cfg.UploadsPublicBase)
 		return exist, nil
 	}
 
-	f, err := os.Open(tmp.Name())
+	f, err := os.Open(tmpPath)
 	if err != nil {
 		return model.File{}, err
 	}
@@ -716,7 +768,7 @@ func (a *API) storeOne(ctx context.Context, fh *multipart.FileHeader) (model.Fil
 
 	created, err := a.Store.CreateFile(model.File{
 		Key:    key,
-		Name:   fh.Filename,
+		Name:   name,
 		Mime:   mime,
 		Size:   size,
 		SHA256: sum,
@@ -729,6 +781,99 @@ func (a *API) storeOne(ctx context.Context, fh *multipart.FileHeader) (model.Fil
 	return created, nil
 }
 
+// mimeToExt 是 allowFileExt 的反向映射：外链转存时内容嗅探出 mime，
+// 反推扩展名（URL 本身可能不带后缀或后缀不可信）。
+var mimeToExt = func() map[string]string {
+	m := make(map[string]string, len(allowFileExt))
+	for ext, mime := range allowFileExt {
+		m[mime] = ext
+	}
+	return m
+}()
+
+// importFiles 外链转存：POST /api/admin/files/import {"urls": [...]}。
+// 站主把别处的图片贴进正文后一键搬进自己的存储——与手动上传同一套
+// 白名单、内容嗅探与内容去重；抓取走 linkmeta 的 SSRF 防护拨号。
+func (a *API) importFiles(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		httpx.Error(w, http.StatusMethodNotAllowed, "POST required")
+		return
+	}
+	var in struct {
+		URLs []string `json:"urls"`
+	}
+	if err := httpx.Decode(r, &in); err != nil {
+		httpx.BadRequest(w, "invalid body")
+		return
+	}
+	if len(in.URLs) == 0 || len(in.URLs) > 20 {
+		httpx.BadRequest(w, "urls 需要1-20个")
+		return
+	}
+	// files 带上 source（原址），前端按它做正文替换
+	type imported struct {
+		Source string     `json:"source"`
+		File   model.File `json:"file"`
+	}
+	files := make([]imported, 0, len(in.URLs))
+	errs := map[string]string{}
+	for _, u := range in.URLs {
+		f, err := a.importOne(r.Context(), u)
+		if err != nil {
+			if bu, ok := err.(badUpload); ok {
+				errs[u] = string(bu)
+			} else {
+				errs[u] = err.Error()
+			}
+			continue
+		}
+		files = append(files, imported{Source: u, File: f})
+	}
+	httpx.OK(w, map[string]any{"files": files, "errors": errs})
+}
+
+func (a *API) importOne(ctx context.Context, rawURL string) (model.File, error) {
+	cctx, cancel := context.WithTimeout(ctx, 20*time.Second)
+	defer cancel()
+	data, ct, err := linkmeta.FetchBytes(cctx, rawURL, maxFileUpload)
+	if err != nil {
+		return model.File{}, fmt.Errorf("抓取失败：%w", err)
+	}
+	if len(data) == 0 {
+		return model.File{}, badUpload("空内容")
+	}
+	// 类型必须落在本站白名单里：嗅探优先（不信响应头，更不信 URL 后缀）
+	detected := strings.SplitN(http.DetectContentType(data[:512]), ";", 2)[0]
+	ext, ok := mimeToExt[detected]
+	if !ok {
+		return model.File{}, badUpload("不支持的类型 " + detected)
+	}
+	_ = ct
+	// 落临时文件：persistFile / S3 PutObject 都要确定的文件与长度
+	tmp, err := os.CreateTemp("", "one-import-*")
+	if err != nil {
+		return model.File{}, err
+	}
+	defer os.Remove(tmp.Name())
+	size, err := tmp.Write(data)
+	if err != nil {
+		tmp.Close()
+		return model.File{}, err
+	}
+	if err := tmp.Close(); err != nil {
+		return model.File{}, err
+	}
+	sum := sha256.Sum256(data)
+	// 名字取 URL 路径末段（仅用于文件管理页展示，不参与存储路径）
+	name := rawURL
+	if u, err := url.Parse(rawURL); err == nil && u.Path != "" {
+		if base := path.Base(u.Path); base != "" && base != "/" && base != "." {
+			name = base
+		}
+	}
+	return a.persistFile(ctx, name, ext, detected, tmp.Name(), int64(size), hex.EncodeToString(sum[:]))
+}
+
 func (a *API) fileByID(w http.ResponseWriter, r *http.Request) {
 	id, err := parseInt(strings.Trim(strings.TrimPrefix(r.URL.Path, "/api/admin/files/"), "/"))
 	if err != nil {
@@ -767,8 +912,121 @@ func (a *API) fileByID(w http.ResponseWriter, r *http.Request) {
 			httpx.ServerError(w, err)
 			return
 		}
+		if a.Thumbs != nil {
+			a.Thumbs.Purge(f.SHA256)
+		}
 		httpx.OK(w, map[string]any{"ok": true})
 	default:
 		httpx.Error(w, http.StatusMethodNotAllowed, "GET/DELETE required")
 	}
 }
+
+// ---------- comments（评论审核与管理） ----------
+
+func (a *API) adminComments(w http.ResponseWriter, r *http.Request) {
+	status := httpx.QueryString(r, "status")
+	page := httpx.QueryInt(r, "page", 1)
+	size := httpx.QueryInt(r, "size", 20)
+	fp, err := a.Store.ListCommentsAdmin(status, page, size)
+	if err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	httpx.OK(w, fp)
+}
+
+func (a *API) adminCommentByID(w http.ResponseWriter, r *http.Request) {
+	rest := strings.Trim(strings.TrimPrefix(r.URL.Path, "/api/admin/comments/"), "/")
+	id, err := parseInt(rest)
+	if err != nil {
+		httpx.BadRequest(w, "bad comment id")
+		return
+	}
+	switch r.Method {
+	case http.MethodPut:
+		// 审核动作：{"status": "visible" | "pending"}
+		var in struct {
+			Status string `json:"status"`
+		}
+		if err := httpx.Decode(r, &in); err != nil {
+			httpx.BadRequest(w, "invalid body")
+			return
+		}
+		if in.Status != "visible" && in.Status != "pending" {
+			httpx.BadRequest(w, "status 只支持 visible / pending")
+			return
+		}
+		if err := a.Store.SetCommentStatus(id, in.Status); err != nil {
+			if errors.Is(err, store.ErrNotFound) {
+				httpx.NotFound(w)
+				return
+			}
+			httpx.ServerError(w, err)
+			return
+		}
+		if in.Status == "visible" && a.Hub != nil {
+			if c, err := a.Store.GetComment(id); err == nil {
+				a.Hub.Broadcast(c.PostID)
+			}
+		}
+		httpx.OK(w, map[string]any{"ok": true})
+	case http.MethodDelete:
+		// 后台删除同样走软删（墓碑保楼层）
+		if err := a.Store.DeleteComment(id); err != nil {
+			if errors.Is(err, store.ErrNotFound) {
+				httpx.NotFound(w)
+				return
+			}
+			httpx.ServerError(w, err)
+			return
+		}
+		if a.Hub != nil {
+			if c, err := a.Store.GetComment(id); err == nil {
+				a.Hub.Broadcast(c.PostID)
+			}
+		}
+		httpx.OK(w, map[string]any{"ok": true})
+	default:
+		httpx.Error(w, http.StatusMethodNotAllowed, "PUT/DELETE required")
+	}
+}
+
+// ---------- readers（评论用户与禁言） ----------
+
+func (a *API) adminReaders(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case http.MethodGet:
+		readers, err := a.Store.ListReaders()
+		if err != nil {
+			httpx.ServerError(w, err)
+			return
+		}
+		httpx.OK(w, map[string]any{"readers": readers})
+	default:
+		httpx.Error(w, http.StatusMethodNotAllowed, "GET required")
+	}
+}
+
+func (a *API) adminReaderBan(w http.ResponseWriter, r *http.Request, id int64) {
+	var in struct {
+		Banned bool `json:"banned"`
+	}
+	if err := httpx.Decode(r, &in); err != nil {
+		httpx.BadRequest(w, "invalid body")
+		return
+	}
+	// 站主身份（管理员会话映射出来的读者）不允许禁言
+	if rd, err := a.Store.GetReader(id); err == nil && rd.Provider == "admin" {
+		httpx.BadRequest(w, "不能禁言站主身份")
+		return
+	}
+	if err := a.Store.SetReaderBanned(id, in.Banned); err != nil {
+		if errors.Is(err, store.ErrNotFound) {
+			httpx.NotFound(w)
+			return
+		}
+		httpx.ServerError(w, err)
+		return
+	}
+	httpx.OK(w, map[string]any{"ok": true, "banned": in.Banned})
+}

backend/internal/admin/limiter.go

@@ -1,18 +1,17 @@
 package admin
 
 import (
-	"net"
 	"net/http"
-	"sync"
 	"time"
+
+	"oneblog/internal/ratelimit"
 )
 
 // loginLimiter 限制每个来源 IP 的登录失败次数（滑动窗口），
 // 防止默认/弱口令被在线暴力破解。成功登录后计数清零。
-type loginLimiter struct {
+// 实现挪到了 internal/ratelimit（读者登录/评论写入共用），这里保留
-	mu   sync.Mutex
+// 原有调用面与常量。
-	hits map[string][]time.Time
+type loginLimiter = ratelimit.Window
-}
 
 const (
 	maxLoginFails = 10
@@ -20,55 +19,10 @@ const (
 )
 
 func newLoginLimiter() *loginLimiter {
-	return &loginLimiter{hits: make(map[string][]time.Time)}
+	return ratelimit.New(maxLoginFails, loginWindow)
 }
 
-func (l *loginLimiter) blocked(key string) bool {
+func sourceKey(r *http.Request) string { return ratelimit.SourceKey(r) }
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	return len(l.recent(key, time.Now())) >= maxLoginFails
-}
-
-func (l *loginLimiter) fail(key string) {
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	now := time.Now()
-	l.hits[key] = append(l.recent(key, now), now)
-}
-
-func (l *loginLimiter) reset(key string) {
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	delete(l.hits, key)
-}
-
-// recent 返回窗口内的失败时间；调用方必须持有 l.mu。
-func (l *loginLimiter) recent(key string, now time.Time) []time.Time {
-	hs := l.hits[key]
-	cut := now.Add(-loginWindow)
-	i := 0
-	for ; i < len(hs); i++ {
-		if hs[i].After(cut) {
-			break
-		}
-	}
-	if i > 0 {
-		hs = hs[i:]
-		l.hits[key] = hs
-	}
-	if len(hs) == 0 {
-		delete(l.hits, key)
-	}
-	return hs
-}
-
-func sourceKey(r *http.Request) string {
-	// 只信连接层地址；X-Forwarded-For 可被伪造，不作为限速键。
-	if host, _, err := net.SplitHostPort(r.RemoteAddr); err == nil {
-		return host
-	}
-	return r.RemoteAddr
-}
 
 // isTLS 判断最终用户看到的是不是 HTTPS（含反代 X-Forwarded-Proto）。
 func isTLS(r *http.Request) bool {

backend/internal/admin/linkcard.go

@@ -0,0 +1,45 @@
+package admin
+
+import (
+	"context"
+	"time"
+
+	"oneblog/internal/linkmeta"
+	"oneblog/internal/model"
+)
+
+// linkFetchBudget 是给外链抓取的时间预算：发布不该被一个慢站点拖住，
+// 超时就当作「这篇没有卡片」。
+const linkFetchBudget = 2500 * time.Millisecond
+
+// linkFetch 是要不要抓远端的注入点：默认走带 SSRF 防护的真实抓取，
+// 测试里换成假实现（真实抓取在测试环境会被自己的防护拦掉）。
+var linkFetch = linkmeta.Fetch
+
+// attachLinkCard 按正文重算短文链接卡片，结果写进 in.LinkCard。
+//
+// 只处理短文（长文在时间线已有封面媒体位，再加卡片会抢位置）；
+// 链接没变就沿用旧卡片，不重复抓远端；正文里删掉链接、或抓取失败，
+// 一律传空卡片把旧的清掉——宁可没有卡片，也不要挂着别的地址抓来的旧数据。
+func attachLinkCard(ctx context.Context, in *model.PostInput, cur *model.LinkCard) {
+	if in.Kind != model.KindShort || in.ContentMd == "" {
+		return
+	}
+	u := linkmeta.FirstURL(in.ContentMd)
+	if u == "" {
+		in.LinkCard = &model.LinkCard{}
+		return
+	}
+	if cur != nil && cur.URL == u {
+		in.LinkCard = cur
+		return
+	}
+	cctx, cancel := context.WithTimeout(ctx, linkFetchBudget)
+	defer cancel()
+	card, err := linkFetch(cctx, u)
+	if err != nil {
+		in.LinkCard = &model.LinkCard{}
+		return
+	}
+	in.LinkCard = card
+}

backend/internal/admin/linkcard_test.go

@@ -0,0 +1,112 @@
+package admin
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"oneblog/internal/model"
+	"oneblog/internal/store"
+)
+
+func TestAttachLinkCard(t *testing.T) {
+	old := linkFetch
+	t.Cleanup(func() { linkFetch = old })
+
+	t.Run("长文不动", func(t *testing.T) {
+		called := false
+		linkFetch = func(context.Context, string) (*model.LinkCard, error) {
+			called = true
+			return nil, nil
+		}
+		in := &model.PostInput{Kind: model.KindLong, ContentMd: "看 https://a.cn"}
+		attachLinkCard(context.Background(), in, nil)
+		if in.LinkCard != nil || called {
+			t.Fatalf("长文不该抓取，card=%+v called=%v", in.LinkCard, called)
+		}
+	})
+
+	t.Run("没链接则清空", func(t *testing.T) {
+		linkFetch = func(context.Context, string) (*model.LinkCard, error) {
+			t.Fatal("没链接不该抓")
+			return nil, nil
+		}
+		in := &model.PostInput{Kind: model.KindShort, ContentMd: "纯文本一句"}
+		attachLinkCard(context.Background(), in, &model.LinkCard{URL: "https://old.cn", Title: "旧"})
+		if in.LinkCard == nil || !in.LinkCard.Empty() {
+			t.Fatalf("应传空卡片清掉旧的，got %+v", in.LinkCard)
+		}
+	})
+
+	t.Run("链接未变则沿用不重抓", func(t *testing.T) {
+		linkFetch = func(context.Context, string) (*model.LinkCard, error) {
+			t.Fatal("同一个链接不该重复抓")
+			return nil, nil
+		}
+		cur := &model.LinkCard{URL: "https://a.cn", Title: "已抓过"}
+		in := &model.PostInput{Kind: model.KindShort, ContentMd: "看 https://a.cn"}
+		attachLinkCard(context.Background(), in, cur)
+		if in.LinkCard != cur {
+			t.Fatalf("应沿用旧卡片，got %+v", in.LinkCard)
+		}
+	})
+
+	t.Run("新链接则抓取", func(t *testing.T) {
+		var gotURL string
+		linkFetch = func(_ context.Context, u string) (*model.LinkCard, error) {
+			gotURL = u
+			return &model.LinkCard{URL: u, Title: "新卡片"}, nil
+		}
+		in := &model.PostInput{Kind: model.KindShort, ContentMd: "换成 https://b.cn/x。"}
+		attachLinkCard(context.Background(), in, &model.LinkCard{URL: "https://a.cn", Title: "旧"})
+		if gotURL != "https://b.cn/x" {
+			t.Fatalf("结尾标点没剪掉: %q", gotURL)
+		}
+		if in.LinkCard == nil || in.LinkCard.Title != "新卡片" {
+			t.Fatalf("card=%+v", in.LinkCard)
+		}
+	})
+
+	t.Run("抓取失败则清空", func(t *testing.T) {
+		linkFetch = func(context.Context, string) (*model.LinkCard, error) {
+			return nil, errors.New("timeout")
+		}
+		in := &model.PostInput{Kind: model.KindShort, ContentMd: "https://slow.cn"}
+		attachLinkCard(context.Background(), in, &model.LinkCard{URL: "https://a.cn", Title: "旧"})
+		if in.LinkCard == nil || !in.LinkCard.Empty() {
+			t.Fatalf("失败应清空，got %+v", in.LinkCard)
+		}
+	})
+}
+
+func TestLinkCardRoundTrip(t *testing.T) {
+	a, _ := newTestAPI(t)
+	card := &model.LinkCard{URL: "https://example.cn/x", Title: "示例标题", Desc: "描述", Site: "example", Image: "https://cdn/i.png"}
+	p, err := a.Store.Create(model.PostInput{Kind: model.KindShort, ContentMd: "看 https://example.cn/x",
+		Status: model.StatusPublished, LinkCard: card})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if p.LinkCard == nil || p.LinkCard.Title != "示例标题" || p.LinkCard.Image != "https://cdn/i.png" {
+		t.Fatalf("创建后没读回卡片: %+v", p.LinkCard)
+	}
+	// 列表接口也要带上（时间线靠它渲染）
+	page, err := a.Store.List(store.ListOptions{Page: 1, Size: 10})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(page.Items) != 1 || page.Items[0].LinkCard == nil {
+		t.Fatalf("列表未带卡片: %+v", page.Items)
+	}
+	// 空卡片 = 清空
+	if _, err := a.Store.Update(p.ID, model.PostInput{LinkCard: &model.LinkCard{}}); err != nil {
+		t.Fatal(err)
+	}
+	got, err := a.Store.Get(p.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got.LinkCard != nil {
+		t.Fatalf("应已清空，got %+v", got.LinkCard)
+	}
+}

backend/internal/admin/meta.go

@@ -0,0 +1,68 @@
+// 长文的自动摘要与自动封面：站主没填这两项时从正文派生——
+// 摘要取正文开头的一段纯文本，封面取正文第一张图。
+// 更新路径只在「新值与旧值都为空」时才生成，站主主动清空的要保得住。
+package admin
+
+import (
+	"regexp"
+	"strings"
+
+	"oneblog/internal/model"
+)
+
+const autoSummaryLen = 110
+
+var (
+	mdImageRe   = regexp.MustCompile(`!\[[^\]]*\]\(([^)\s]+)[^)]*\)`)
+	mdCodeFence = regexp.MustCompile("(?s)```.*?```")
+	mdLinkRe    = regexp.MustCompile(`\[([^\]]*)\]\([^)]*\)`)
+	mdHeadingRe = regexp.MustCompile(`(?m)^#{1,6}\s+.*$`) // 标题行整行不进摘要（与文章标题重复）
+	mdNoiseRe   = regexp.MustCompile(`(?m)^([>\s*-]+|\d+\.\s)+`)
+	mdEmphasis  = strings.NewReplacer("**", "", "__", "", "~~", "", "*", "", "_", "")
+	wsRe        = regexp.MustCompile(`\s+`)
+)
+
+// autoMeta 按需填充 in.Summary / in.CoverURL。
+// cur 为更新前的旧文章（新建时传 nil）。
+func autoMeta(in *model.PostInput, cur *model.Post) {
+	if in.Kind != model.KindLong || strings.TrimSpace(in.ContentMd) == "" {
+		return
+	}
+	if strings.TrimSpace(in.Summary) == "" && (cur == nil || strings.TrimSpace(cur.Summary) == "") {
+		in.Summary = summarizeMarkdown(in.ContentMd, autoSummaryLen)
+	}
+	if strings.TrimSpace(in.CoverURL) == "" && (cur == nil || strings.TrimSpace(cur.CoverURL) == "") {
+		in.CoverURL = firstImage(in.ContentMd)
+	}
+}
+
+// summarizeMarkdown 剥掉 markdown 语法后取正文开头一段纯文本
+func summarizeMarkdown(md string, maxRunes int) string {
+	s := mdCodeFence.ReplaceAllString(md, " ") // 代码块整段不进摘要
+	s = mdHeadingRe.ReplaceAllString(s, " ")
+	s = mdImageRe.ReplaceAllString(s, " ")
+	s = mdLinkRe.ReplaceAllString(s, "$1")
+	s = mdNoiseRe.ReplaceAllString(s, " ")
+	s = mdEmphasis.Replace(s)
+	s = strings.ReplaceAll(s, "`", "")
+	s = wsRe.ReplaceAllString(s, " ")
+	s = strings.TrimSpace(s)
+	runes := []rune(s)
+	if len(runes) > maxRunes {
+		return string(runes[:maxRunes]) + "…"
+	}
+	return s
+}
+
+// firstImage 取正文第一张图片的地址（markdown 图；http/站内路径均可）
+func firstImage(md string) string {
+	m := mdImageRe.FindStringSubmatch(md)
+	if m == nil {
+		return ""
+	}
+	u := m[1]
+	if strings.HasPrefix(u, "http://") || strings.HasPrefix(u, "https://") || strings.HasPrefix(u, "/uploads/") {
+		return u
+	}
+	return ""
+}

backend/internal/admin/meta_test.go

@@ -0,0 +1,62 @@
+package admin
+
+import (
+	"strings"
+	"testing"
+
+	"oneblog/internal/model"
+)
+
+func TestSummarizeMarkdown(t *testing.T) {
+	md := "## 标题\n\n这是**正文**的第一段，含[链接](https://x.com)与图片：\n\n![封面](https://a.com/1.png)\n\n```go\ncode ignored\n```\n\n后续内容"
+	got := summarizeMarkdown(md, 110)
+	for _, bad := range []string{"#", "**", "![]", "```", "code ignored"} {
+		if strings.Contains(got, bad) {
+			t.Errorf("summary 含语法残留 %q: %q", bad, got)
+		}
+	}
+	if !strings.Contains(got, "链接") || !strings.HasPrefix(got, "这是") {
+		t.Errorf("summary 应以正文开头并保留链接文字: %q", got)
+	}
+	long := strings.Repeat("长", 200)
+	if got := summarizeMarkdown(long, 110); len([]rune(got)) != 111 || !strings.HasSuffix(got, "…") {
+		t.Errorf("超长应截到 110+省略号, got %d runes", len([]rune(got)))
+	}
+}
+
+func TestFirstImage(t *testing.T) {
+	md := "前言\n\n![封面](https://a.com/1.png)\n\n![第二张](https://a.com/2.png)"
+	if got := firstImage(md); got != "https://a.com/1.png" {
+		t.Errorf("firstImage = %q", got)
+	}
+	if got := firstImage("没有图片"); got != "" {
+		t.Errorf("无图应返回空, got %q", got)
+	}
+}
+
+func TestAutoMeta(t *testing.T) {
+	in := model.PostInput{Kind: model.KindLong, ContentMd: "# T\n\n正文内容 ![图](https://a.com/x.png)"}
+	autoMeta(&in, nil)
+	if in.Summary == "" || in.CoverURL != "https://a.com/x.png" {
+		t.Errorf("空字段应自动填充: summary=%q cover=%q", in.Summary, in.CoverURL)
+	}
+	// 站主已填的不能覆盖
+	in2 := model.PostInput{Kind: model.KindLong, ContentMd: "正文", Summary: "手写的", CoverURL: ""}
+	autoMeta(&in2, nil)
+	if in2.Summary != "手写的" {
+		t.Errorf("手写摘要不应被覆盖: %q", in2.Summary)
+	}
+	// 更新路径：新值与旧值都空才补——主动清空的保得住
+	cleared := model.PostInput{Kind: model.KindLong, ContentMd: "正文", Summary: "", CoverURL: ""}
+	cur := model.Post{Summary: "旧摘要", CoverURL: "旧封面"}
+	autoMeta(&cleared, &cur)
+	if cleared.Summary != "" || cleared.CoverURL != "" {
+		t.Errorf("主动清空不应复活: summary=%q cover=%q", cleared.Summary, cleared.CoverURL)
+	}
+	// 新旧都空 → 生成
+	never := model.PostInput{Kind: model.KindLong, ContentMd: "正文 ![图](/uploads/a.png)"}
+	autoMeta(&never, &model.Post{})
+	if never.CoverURL != "/uploads/a.png" {
+		t.Errorf("新旧都空应取首图: %q", never.CoverURL)
+	}
+}

backend/internal/api/api.go

@@ -12,20 +12,58 @@ import (
 	"strings"
 	"time"
 
+	"oneblog/internal/auth"
 	"oneblog/internal/config"
 	"oneblog/internal/httpx"
+	"oneblog/internal/hub"
 	"oneblog/internal/model"
+	"oneblog/internal/ratelimit"
+	"oneblog/internal/render"
 	"oneblog/internal/storage"
 	"oneblog/internal/store"
+	"oneblog/internal/thumbs"
 )
 
 type API struct {
-	Store  *store.Store
+	Store *store.Store
-	Cfg    *config.Config
+	Cfg   *config.Config
-	Blobs  storage.BlobStore // 文件上传的存储后端（main.go 装配，与 admin 共享）
+	Blobs storage.BlobStore // 文件上传的存储后端（main.go 装配，与 admin 共享）
+	// Thumbs 是缩略图磁盘缓存（main.go 装配，DataDir/.thumbnail_cache）。
+	// 为 nil 时 /uploads/thumb/ 路由直接回原图。
+	Thumbs *thumbs.Store
+	// 评论区读者会话与 GitHub OAuth（main.go 装配）
+	ReaderSessions *auth.ReaderSessions
+	GH             auth.GitHub
+	// AdminSessions 是后台管理员会话验证器（admin.Sessions 满足它）。
+	// 管理员登录后台后无需再走读者登录即可用站主身份评论。
+	AdminSessions interface {
+		Verify(token string) (string, error)
+	}
+	// 其余登录方式（main.go 装配，未配置的自动不开放）
+	GG auth.Google
+	TG auth.Telegram
+	// Hub 是评论变更的进程内广播（SSE 用；与后台 admin 共享同一实例）
+	Hub *hub.Hub
+
+	// 限流（Routes 里惰性初始化）：读者登录失败按 IP 计、评论写入按读者计。
+	// 登录入口此前裸奔——OAuth 跳转本身难刷，但 state 校验失败、
+	// Telegram 伪造签名这类恶意请求需要一个兜底。
+	authFails  *ratelimit.Window
+	commentNew *ratelimit.Window
 }
 
+const (
+	maxAuthFails   = 20 // 窗口内允许的登录失败（含伪造回调）
+	authFailWindow = 10 * time.Minute
+	maxComments    = 5 // 每个读者每窗口最多发几条
+	commentWindow  = time.Minute
+)
+
 func (a *API) Routes() http.Handler {
+	if a.authFails == nil {
+		a.authFails = ratelimit.New(maxAuthFails, authFailWindow)
+		a.commentNew = ratelimit.New(maxComments, commentWindow)
+	}
 	mux := http.NewServeMux()
 	mux.HandleFunc("/api/health", func(w http.ResponseWriter, r *http.Request) {
 		if err := a.Store.Ping(r.Context()); err != nil {
@@ -34,6 +72,18 @@ func (a *API) Routes() http.Handler {
 		}
 		httpx.OK(w, map[string]any{"ok": true, "driver": a.Cfg.Driver})
 	})
+	// 读者登录与评论
+	mux.HandleFunc("/api/auth/providers", a.authProviders)
+	mux.HandleFunc("/api/auth/me", a.authMe)
+	mux.HandleFunc("/api/auth/logout", a.authLogout)
+	mux.HandleFunc("/api/auth/github/login", a.githubLogin)
+	mux.HandleFunc("/api/auth/callback/github", a.githubCallback)
+	mux.HandleFunc("/api/auth/google/login", a.googleLogin)
+	mux.HandleFunc("/api/auth/callback/google", a.googleCallback)
+	mux.HandleFunc("/api/auth/telegram", a.telegramAuth)
+	mux.HandleFunc("/api/comments", a.comments)
+	mux.HandleFunc("/api/comments/stream", a.commentsStream)
+	mux.HandleFunc("/api/comments/", a.commentSub)
 	mux.HandleFunc("/api/site", a.site)
 	mux.HandleFunc("/api/posts", a.listPosts)
 	mux.HandleFunc("/api/posts/", a.getPost)
@@ -58,7 +108,8 @@ func (a *API) site(w http.ResponseWriter, r *http.Request) {
 		httpx.ServerError(w, err)
 		return
 	}
-	httpx.OK(w, st)
+	// uploads_public_base 告诉前端哪些图片直链是自己的存储（可转 /uploads/thumb/ 缩略图）
+	httpx.OK(w, map[string]any{"settings": st, "uploads_public_base": a.Cfg.UploadsPublicBase})
 }
 
 func listOptions(r *http.Request, defSize int) store.ListOptions {
@@ -78,6 +129,12 @@ func (a *API) listPosts(w http.ResponseWriter, r *http.Request) {
 		httpx.ServerError(w, err)
 		return
 	}
+	// 时间线上短文直接铺正文：出口处做盘古之白（库里存的是原始渲染结果）
+	for i := range page.Items {
+		if page.Items[i].Kind == model.KindShort {
+			page.Items[i].ContentHTML = render.PanguHTML(page.Items[i].ContentHTML)
+		}
+	}
 	httpx.OK(w, page)
 }
 
@@ -106,6 +163,8 @@ func (a *API) getPost(w http.ResponseWriter, r *http.Request) {
 	if err != nil {
 		nb = nil
 	}
+	// 详情正文出口做盘古之白（存库不动，改的是渲染层）
+	p.ContentHTML = render.PanguHTML(p.ContentHTML)
 	httpx.OK(w, struct {
 		model.Post
 		Neighbors []model.Post `json:"neighbors"`
@@ -205,7 +264,7 @@ func (a *API) RSS(w http.ResponseWriter, r *http.Request) {
 		}
 		desc := p.Summary
 		if desc == "" {
-			desc = trimRunes(stripTags(p.ContentHTML), 160)
+			desc = trimRunes(stripTags(render.PanguHTML(p.ContentHTML)), 160)
 		}
 		item := rssItem{
 			Title:       title,
@@ -318,11 +377,17 @@ func (a *API) uploads(w http.ResponseWriter, r *http.Request) {
 	}
 	defer rc.Close()
 
+	// ServeContent 自带 Range（视频/音频拖动进度条必需）、ETag 比对与 304。
+	// key 含内容哈希：内容不变则 URL 不变，可永久缓存。
 	w.Header().Set("Content-Type", f.Mime)
-	w.Header().Set("Content-Length", strconv.FormatInt(size, 10))
 	w.Header().Set("ETag", `"`+f.SHA256+`"`)
-	// key 含内容哈希：内容不变则 URL 不变，可永久缓存
 	w.Header().Set("Cache-Control", "public, max-age=31536000, immutable")
+	if rs, ok := rc.(io.ReadSeeker); ok {
+		http.ServeContent(w, r, f.Name, time.Time{}, rs)
+		return
+	}
+	// 非本地存储拿不到 Seeker 时退回流式拷贝
+	w.Header().Set("Content-Length", strconv.FormatInt(size, 10))
 	if match := r.Header.Get("If-None-Match"); match != "" && match == `"`+f.SHA256+`"` {
 		w.WriteHeader(http.StatusNotModified)
 		return

backend/internal/api/api_test.go

@@ -0,0 +1,96 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+	"time"
+
+	"oneblog/internal/auth"
+	"oneblog/internal/config"
+	"oneblog/internal/db"
+	"oneblog/internal/model"
+	"oneblog/internal/store"
+)
+
+func newTestAPI(t *testing.T) (*API, http.Handler) {
+	t.Helper()
+	d, err := db.Open("sqlite", ":memory:")
+	if err != nil {
+		t.Fatalf("open sqlite: %v", err)
+	}
+	t.Cleanup(func() { d.Close() })
+	st, err := store.New(d)
+	if err != nil {
+		t.Fatalf("store: %v", err)
+	}
+	a := &API{
+		Store:          st,
+		Cfg:            &config.Config{SiteURL: "http://localhost:8080"},
+		ReaderSessions: auth.NewReaderSessions("test-secret", time.Hour),
+		TG:             auth.Telegram{Bot: "testbot", Token: "123:abc"},
+	}
+	settings, err := st.GetSettings()
+	if err != nil {
+		t.Fatalf("settings: %v", err)
+	}
+	settings.CommentsEnabled = true
+	if err := st.UpdateSettings(settings); err != nil {
+		t.Fatalf("enable comments: %v", err)
+	}
+	return a, a.Routes()
+}
+
+// Telegram 伪造签名反复重试应触发 IP 限速
+func TestTelegramAuthRateLimited(t *testing.T) {
+	_, h := newTestAPI(t)
+	body := `{"id":1,"first_name":"x","hash":"deadbeef"}`
+	var rec *httptest.ResponseRecorder
+	for i := 0; i < maxAuthFails; i++ {
+		req := httptest.NewRequest(http.MethodPost, "/api/auth/telegram", strings.NewReader(body))
+		rec = httptest.NewRecorder()
+		h.ServeHTTP(rec, req)
+		if rec.Code != http.StatusForbidden {
+			t.Fatalf("attempt %d: got %d, want 403", i+1, rec.Code)
+		}
+	}
+	req := httptest.NewRequest(http.MethodPost, "/api/auth/telegram", strings.NewReader(body))
+	rec = httptest.NewRecorder()
+	h.ServeHTTP(rec, req)
+	if rec.Code != http.StatusTooManyRequests {
+		t.Fatalf("after %d failures: got %d, want 429", maxAuthFails, rec.Code)
+	}
+}
+
+// 评论写入按读者限速：第 maxComments+1 条被拒
+func TestCommentRateLimited(t *testing.T) {
+	a, h := newTestAPI(t)
+	p, err := a.Store.Create(model.PostInput{Kind: model.KindLong, Title: "t", Slug: "t",
+		ContentMd: "x", Status: model.StatusPublished})
+	if err != nil {
+		t.Fatal(err)
+	}
+	rd, err := a.Store.UpsertReader(model.Reader{Provider: "github", Handle: "u1", Name: "u1"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	tok, _ := a.ReaderSessions.Issue(rd.ID)
+	post := func(i int) *httptest.ResponseRecorder {
+		body, _ := json.Marshal(map[string]any{"post_id": p.ID, "body_md": "好"})
+		req := httptest.NewRequest(http.MethodPost, "/api/comments", strings.NewReader(string(body)))
+		req.AddCookie(&http.Cookie{Name: auth.ReaderCookie, Value: tok})
+		rec := httptest.NewRecorder()
+		h.ServeHTTP(rec, req)
+		return rec
+	}
+	for i := 0; i < maxComments; i++ {
+		if rec := post(i); rec.Code != http.StatusCreated {
+			t.Fatalf("comment %d: got %d %s", i+1, rec.Code, rec.Body.String())
+		}
+	}
+	if rec := post(maxComments); rec.Code != http.StatusTooManyRequests {
+		t.Fatalf("over limit: got %d, want 429", rec.Code)
+	}
+}

backend/internal/api/comments.go

@@ -0,0 +1,432 @@
+// 读者登录与评论的公开接口。登录走 GitHub OAuth 整页跳转；
+// 会话是 httpOnly cookie（one_reader），与后台会话（one_session）互不相通。
+//
+// 审核：设置里开了「先审后显」时，新评论 status=pending——
+// 只有作者自己能在列表里看到（带「审核中」角标），站主通过后才公开。
+package api
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"errors"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"oneblog/internal/auth"
+	"oneblog/internal/httpx"
+	"oneblog/internal/model"
+	"oneblog/internal/ratelimit"
+	"oneblog/internal/render"
+	"oneblog/internal/store"
+)
+
+const (
+	readerCookie   = "one_reader"
+	oauthStateCook = "one_oauth_state"
+	oauthBackCook  = "one_oauth_back"
+	maxCommentLen  = 500
+	editWindow     = 10 * time.Minute
+)
+
+// readerID 从会话 cookie 解出读者 ID；匿名返回 false。
+// 后台管理员已登录（one_session）时直接映射为站主读者身份——
+// 站主发评论不必再走一遍 GitHub 登录。
+func (a *API) readerID(r *http.Request) (int64, bool) {
+	rd, ok, err := a.resolveReader(r)
+	if err != nil || !ok {
+		return 0, false
+	}
+	return rd.ID, true
+}
+
+// resolveReader 解出当前访客的读者身份：读者会话优先，
+// 其次是后台管理员会话（自动 upsert 一个 provider=admin 的站主读者）。
+func (a *API) resolveReader(r *http.Request) (model.Reader, bool, error) {
+	if ck, err := r.Cookie(auth.ReaderCookie); err == nil && ck.Value != "" {
+		if id, verr := a.ReaderSessions.Verify(ck.Value); verr == nil {
+			rd, gerr := a.Store.GetReader(id)
+			if gerr == nil {
+				return rd, true, nil
+			}
+		}
+	}
+	if a.AdminSessions != nil {
+		if ck, err := r.Cookie("one_session"); err == nil && ck.Value != "" {
+			if _, verr := a.AdminSessions.Verify(ck.Value); verr == nil {
+				rd, oerr := a.ownerReader()
+				if oerr == nil {
+					return rd, true, nil
+				}
+			}
+		}
+	}
+	return model.Reader{}, false, nil
+}
+
+// ownerReader 取（或创建）站主评论身份：provider=admin，名字用站点作者名。
+func (a *API) ownerReader() (model.Reader, error) {
+	name := "站主"
+	if st, err := a.Store.GetSettings(); err == nil && st.AuthorName != "" {
+		name = st.AuthorName
+	}
+	return a.Store.UpsertReader(model.Reader{
+		Provider: "admin", Handle: a.Cfg.AdminUser, Name: name,
+	})
+}
+
+func (a *API) authMe(w http.ResponseWriter, r *http.Request) {
+	var user any // 匿名时 {user: null}，前端判空即「未登录」
+	if reader, ok, err := a.resolveReader(r); err == nil && ok {
+		user = map[string]any{
+			"id": reader.ID, "name": reader.Name, "handle": reader.Handle,
+			"avatar_url": reader.AvatarURL, "url": reader.URL,
+			"provider": reader.Provider, "is_owner": reader.Provider == "admin", "banned": reader.Banned,
+		}
+	}
+	httpx.OK(w, map[string]any{"user": user})
+}
+
+func (a *API) authLogout(w http.ResponseWriter, r *http.Request) {
+	http.SetCookie(w, &http.Cookie{Name: auth.ReaderCookie, Value: "", Path: "/", MaxAge: -1})
+	httpx.OK(w, map[string]any{"ok": true})
+}
+
+// githubLogin 跳转 GitHub 授权页。state 防 CSRF 存短命 cookie；
+// 授权完成回到 callback 后必须带上同一个值。
+// 同时把发起登录的前台 origin 记下来（one_oauth_back），
+// callback 用它跳回去——开发时前端 3000 / 后端 8080 分离才不会落错站。
+func (a *API) githubLogin(w http.ResponseWriter, r *http.Request) {
+	if !a.GH.Enabled() {
+		httpx.NotFound(w)
+		return
+	}
+	state := randHex(16)
+	http.SetCookie(w, &http.Cookie{Name: oauthStateCook, Value: state, Path: "/",
+		HttpOnly: true, MaxAge: 600})
+	if ref := r.Referer(); ref != "" {
+		if u, err := url.Parse(ref); err == nil && u.Scheme != "" && u.Host != "" {
+			http.SetCookie(w, &http.Cookie{Name: oauthBackCook,
+				Value: u.Scheme + "://" + u.Host, Path: "/", HttpOnly: true, MaxAge: 600})
+		}
+	}
+	http.Redirect(w, r, a.GH.LoginURL(a.Cfg.SiteURL+"/api/auth/callback/github", state), http.StatusFound)
+}
+
+// githubCallback 用 code 换身份：GitHub 用户 → upsert 读者 → 发会话 →
+// 回到首页。
+func (a *API) githubCallback(w http.ResponseWriter, r *http.Request) {
+	if !a.GH.Enabled() {
+		httpx.NotFound(w)
+		return
+	}
+	ip := ratelimit.SourceKey(r)
+	if a.authFails.Blocked(ip) {
+		httpx.Error(w, http.StatusTooManyRequests, "登录失败次数过多，请稍后再试")
+		return
+	}
+	ck, err := r.Cookie(oauthStateCook)
+	if err != nil || ck.Value == "" || ck.Value != r.FormValue("state") {
+		a.authFails.Add(ip)
+		httpx.BadRequest(w, "state 不匹配，请重新登录")
+		return
+	}
+	gh, err := a.GH.Exchange(r.Context(), r.FormValue("code"), a.Cfg.SiteURL+"/api/auth/callback/github")
+	if err != nil {
+		a.authFails.Add(ip)
+		httpx.ServerError(w, err)
+		return
+	}
+	u, err := a.GH.FetchUser(r.Context(), gh)
+	if err != nil {
+		a.authFails.Add(ip)
+		httpx.ServerError(w, err)
+		return
+	}
+	name := u.Name
+	if name == "" {
+		name = u.Login
+	}
+	reader, err := a.Store.UpsertReader(model.Reader{
+		Provider: "github", Handle: u.Login, Name: name,
+		AvatarURL: u.AvatarURL, URL: u.HTMLURL,
+	})
+	if err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	http.Redirect(w, r, a.issueReaderCookie(w, r, reader.ID), http.StatusFound)
+}
+
+func randHex(n int) string {
+	b := make([]byte, n)
+	_, _ = rand.Read(b)
+	return hex.EncodeToString(b)
+}
+
+// ---------- comments（评论的读取与发表） ----------
+
+func (a *API) comments(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case http.MethodGet:
+		a.listComments(w, r)
+	case http.MethodPost:
+		a.createComment(w, r)
+	default:
+		httpx.Error(w, http.StatusMethodNotAllowed, "GET/POST required")
+	}
+}
+
+func (a *API) listComments(w http.ResponseWriter, r *http.Request) {
+	postID := httpx.QueryInt(r, "post_id", 0)
+	if postID <= 0 {
+		httpx.BadRequest(w, "post_id required")
+		return
+	}
+	viewer, _ := a.readerID(r)
+	newest := httpx.QueryString(r, "sort") == "newest"
+	roots, err := a.Store.ListCommentsByPost(int64(postID), viewer, newest)
+	if err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	httpx.OK(w, map[string]any{
+		"items": roots, "total": len(roots),
+		"page": 1, "size": len(roots),
+	})
+}
+
+// createComment 发表评论（含回复）。登录 + 未禁言 + 评论开关开着；
+// 审核开关开着时新评论进「待审」。站主身份（管理员会话）不受禁言与审核约束。
+func (a *API) createComment(w http.ResponseWriter, r *http.Request) {
+	reader, ok, err := a.resolveReader(r)
+	if err != nil {
+		httpx.Error(w, http.StatusUnauthorized, "登录已过期，刷新页面重新登录")
+		return
+	}
+	if !ok {
+		httpx.Error(w, http.StatusUnauthorized, "登录后才能评论")
+		return
+	}
+	isOwner := reader.Provider == "admin"
+	if reader.Banned && !isOwner {
+		httpx.Error(w, http.StatusForbidden, "你已被禁言，暂时无法评论")
+		return
+	}
+	// 写入限速：每读者每分钟最多 maxComments 条（站主豁免，批量回复不该被卡）
+	var rateKey string
+	if !isOwner {
+		rateKey = strconv.FormatInt(reader.ID, 10)
+		if a.commentNew.Blocked(rateKey) {
+			httpx.Error(w, http.StatusTooManyRequests, "发得太快了，休息一分钟再试")
+			return
+		}
+	}
+	st, err := a.Store.GetSettings()
+	if err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	if !st.CommentsEnabled {
+		httpx.Error(w, http.StatusForbidden, "评论未开放")
+		return
+	}
+	var in struct {
+		PostID   int64  `json:"post_id"`
+		ParentID int64  `json:"parent_id"`
+		BodyMd   string `json:"body_md"`
+	}
+	if err := httpx.Decode(r, &in); err != nil {
+		httpx.BadRequest(w, "invalid body")
+		return
+	}
+	body := strings.TrimSpace(in.BodyMd)
+	if body == "" {
+		httpx.BadRequest(w, "评论内容不能为空")
+		return
+	}
+	if len([]rune(body)) > maxCommentLen {
+		httpx.BadRequest(w, "评论最多 500 字")
+		return
+	}
+	if _, err := a.Store.Get(in.PostID); err != nil {
+		httpx.BadRequest(w, "文章不存在")
+		return
+	}
+	var parent model.Comment
+	root := int64(0)
+	if in.ParentID > 0 {
+		p, err := a.Store.GetComment(in.ParentID)
+		if err != nil {
+			httpx.BadRequest(w, "回复的评论不存在")
+			return
+		}
+		if p.PostID != in.PostID {
+			httpx.BadRequest(w, "回复的评论不属于这篇文章")
+			return
+		}
+		parent = p
+		root = parent.RootID
+		if root == 0 {
+			root = parent.ID
+		}
+	}
+	status := "visible"
+	if st.CommentsReview && !isOwner {
+		status = "pending"
+	}
+	c, err := a.Store.CreateComment(model.Comment{
+		PostID: in.PostID, UserID: reader.ID, ParentID: in.ParentID, RootID: root,
+		BodyMd: body, BodyHTML: render.Markdown(body), Status: status,
+	})
+	if err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	a.Hub.Broadcast(in.PostID)
+	if rateKey != "" {
+		a.commentNew.Add(rateKey) // 只计成功写入：空正文这类手滑不扣配额
+	}
+	httpx.Created(w, c)
+}
+
+// commentSub /api/comments/{id} 与 /api/comments/{root}/thread 的分发
+func (a *API) commentSub(w http.ResponseWriter, r *http.Request) {
+	rest := strings.Trim(strings.TrimPrefix(r.URL.Path, "/api/comments/"), "/")
+	if rest == "" {
+		httpx.NotFound(w)
+		return
+	}
+	// {root}/thread：楼内回复翻页（当前实现全量内嵌，这里兜底返回剩余）
+	if strings.HasSuffix(rest, "/thread") {
+		rootID, err := strconv.ParseInt(strings.TrimSuffix(rest, "/thread"), 10, 64)
+		if err != nil {
+			httpx.BadRequest(w, "bad root id")
+			return
+		}
+		a.commentThread(w, r, rootID)
+		return
+	}
+	id, err := strconv.ParseInt(rest, 10, 64)
+	if err != nil {
+		httpx.BadRequest(w, "bad comment id")
+		return
+	}
+	switch r.Method {
+	case http.MethodPut:
+		a.editComment(w, r, id)
+	case http.MethodDelete:
+		a.deleteComment(w, r, id)
+	default:
+		httpx.Error(w, http.StatusMethodNotAllowed, "PUT/DELETE required")
+	}
+}
+
+func (a *API) commentThread(w http.ResponseWriter, r *http.Request, rootID int64) {
+	root, err := a.Store.GetComment(rootID)
+	if err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	cursor := httpx.QueryInt(r, "cursor", 0)
+	items := []model.Comment{}
+	if cursor >= 0 && cursor < len(root.Replies) {
+		items = root.Replies[cursor:]
+	}
+	httpx.OK(w, map[string]any{"items": items, "cursor": "", "reply_count": root.ReplyCount})
+}
+
+// editComment 作者改自己的评论：10 分钟内有效，且未被禁言未删除
+func (a *API) editComment(w http.ResponseWriter, r *http.Request, id int64) {
+	readerID, ok := a.readerID(r)
+	if !ok {
+		httpx.Error(w, http.StatusUnauthorized, "登录已过期")
+		return
+	}
+	c, err := a.Store.GetComment(id)
+	if errors.Is(err, store.ErrNotFound) {
+		httpx.NotFound(w)
+		return
+	}
+	if err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	if c.UserID != readerID {
+		httpx.Error(w, http.StatusForbidden, "只能编辑自己的评论")
+		return
+	}
+	if c.IsDeleted {
+		httpx.NotFound(w)
+		return
+	}
+	if time.Since(mustParse(c.CreatedAt)) > editWindow {
+		httpx.Error(w, http.StatusForbidden, "超过可编辑时间")
+		return
+	}
+	var in struct {
+		BodyMd string `json:"body_md"`
+	}
+	if err := httpx.Decode(r, &in); err != nil {
+		httpx.BadRequest(w, "invalid body")
+		return
+	}
+	body := strings.TrimSpace(in.BodyMd)
+	if body == "" {
+		httpx.BadRequest(w, "评论内容不能为空")
+		return
+	}
+	if len([]rune(body)) > maxCommentLen {
+		httpx.BadRequest(w, "评论最多 500 字")
+		return
+	}
+	if err := a.Store.UpdateCommentBody(id, body, render.Markdown(body)); err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	updated, err := a.Store.GetComment(id)
+	if err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	a.Hub.Broadcast(updated.PostID)
+	httpx.OK(w, updated)
+}
+
+// deleteComment 作者软删自己的评论（留壳保楼层）
+func (a *API) deleteComment(w http.ResponseWriter, r *http.Request, id int64) {
+	readerID, ok := a.readerID(r)
+	if !ok {
+		httpx.Error(w, http.StatusUnauthorized, "登录已过期")
+		return
+	}
+	c, err := a.Store.GetComment(id)
+	if errors.Is(err, store.ErrNotFound) {
+		httpx.NotFound(w)
+		return
+	}
+	if err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	if c.UserID != readerID {
+		httpx.Error(w, http.StatusForbidden, "只能删除自己的评论")
+		return
+	}
+	if err := a.Store.DeleteComment(id); err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	a.Hub.Broadcast(c.PostID)
+	httpx.OK(w, map[string]any{"ok": true})
+}
+
+func mustParse(s string) time.Time {
+	t, err := time.Parse(time.RFC3339, s)
+	if err != nil {
+		return time.Time{}
+	}
+	return t
+}

backend/internal/api/providers.go

@@ -0,0 +1,192 @@
+// Google / Telegram 登录的 HTTP 端点。GitHub 的在 comments.go——
+// 三个 Provider 共用同一套读者会话与 upsert 逻辑，只是凭据交换方式不同：
+// GitHub / Google 是授权码换 token，Telegram 是官方 widget 直接带签名资料。
+package api
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/url"
+	"strconv"
+	"time"
+
+	"oneblog/internal/auth"
+	"oneblog/internal/httpx"
+	"oneblog/internal/model"
+	"oneblog/internal/ratelimit"
+)
+
+// authProviders 列出已配置的登录方式。
+// redirect 型前端直接跳 /api/auth/{id}/login；widget 型（Telegram）
+// 前端内联官方脚本，需要 bot 用户名。
+func (a *API) authProviders(w http.ResponseWriter, r *http.Request) {
+	providers := []map[string]any{}
+	if a.GH.Enabled() {
+		providers = append(providers, map[string]any{
+			"id": "github", "label": "GitHub", "kind": "redirect",
+		})
+	}
+	if a.GG.Enabled() {
+		providers = append(providers, map[string]any{
+			"id": "google", "label": "Google", "kind": "redirect",
+		})
+	}
+	if a.TG.Enabled() {
+		providers = append(providers, map[string]any{
+			"id": "telegram", "label": "Telegram", "kind": "widget", "login": a.TG.Bot,
+		})
+	}
+	httpx.OK(w, map[string]any{"providers": providers})
+}
+
+// issueReaderCookie 登录成功后的公共收尾：发读者会话 + 决定跳回去的地址
+func (a *API) issueReaderCookie(w http.ResponseWriter, r *http.Request, readerID int64) string {
+	token, _ := a.ReaderSessions.Issue(readerID)
+	http.SetCookie(w, &http.Cookie{Name: auth.ReaderCookie, Value: token, Path: "/",
+		HttpOnly: true, SameSite: http.SameSiteLaxMode, MaxAge: int((30 * 24 * time.Hour).Seconds())})
+	// 回到发起登录的前台；没有记录（直接敲 URL 进来的）就回站点根
+	back := a.Cfg.SiteURL
+	if ck, err := r.Cookie(oauthBackCook); err == nil && ck.Value != "" {
+		if u, err := url.Parse(ck.Value); err == nil && (u.Scheme == "http" || u.Scheme == "https") && u.Host != "" && u.Path == "" {
+			back = u.Scheme + "://" + u.Host
+		}
+	}
+	http.SetCookie(w, &http.Cookie{Name: oauthBackCook, Value: "", Path: "/", MaxAge: -1})
+	return back
+}
+
+// googleLogin 跳 Google 授权页（state 防 CSRF 同 GitHub）
+func (a *API) googleLogin(w http.ResponseWriter, r *http.Request) {
+	if !a.GG.Enabled() {
+		httpx.NotFound(w)
+		return
+	}
+	state := randHex(16)
+	http.SetCookie(w, &http.Cookie{Name: oauthStateCook, Value: state, Path: "/",
+		HttpOnly: true, MaxAge: 600})
+	if ref := r.Referer(); ref != "" {
+		if u, err := url.Parse(ref); err == nil && u.Scheme != "" && u.Host != "" {
+			http.SetCookie(w, &http.Cookie{Name: oauthBackCook,
+				Value: u.Scheme + "://" + u.Host, Path: "/", HttpOnly: true, MaxAge: 600})
+		}
+	}
+	http.Redirect(w, r, a.GG.LoginURL(a.Cfg.SiteURL+"/api/auth/callback/google", state), http.StatusFound)
+}
+
+// googleCallback 用 code 换身份：Google 用户 → upsert 读者 → 发会话
+func (a *API) googleCallback(w http.ResponseWriter, r *http.Request) {
+	if !a.GG.Enabled() {
+		httpx.NotFound(w)
+		return
+	}
+	ip := ratelimit.SourceKey(r)
+	if a.authFails.Blocked(ip) {
+		httpx.Error(w, http.StatusTooManyRequests, "登录失败次数过多，请稍后再试")
+		return
+	}
+	ck, err := r.Cookie(oauthStateCook)
+	if err != nil || ck.Value == "" || ck.Value != r.FormValue("state") {
+		a.authFails.Add(ip)
+		httpx.BadRequest(w, "state 不匹配，请重新登录")
+		return
+	}
+	accessToken, err := a.GG.Exchange(r.Context(), r.FormValue("code"), a.Cfg.SiteURL+"/api/auth/callback/google")
+	if err != nil {
+		a.authFails.Add(ip)
+		httpx.ServerError(w, err)
+		return
+	}
+	u, err := a.GG.FetchUser(r.Context(), accessToken)
+	if err != nil {
+		a.authFails.Add(ip)
+		httpx.ServerError(w, err)
+		return
+	}
+	// handle 优先用已验证邮箱（可读），否则退回 sub（Google 的稳定唯一 id）
+	handle := u.Sub
+	if u.EmailVerified && u.Email != "" {
+		handle = u.Email
+	}
+	name := u.Name
+	if name == "" {
+		name = handle
+	}
+	reader, err := a.Store.UpsertReader(model.Reader{
+		Provider: "google", Handle: handle, Name: name,
+		AvatarURL: u.Picture,
+	})
+	if err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	http.Redirect(w, r, a.issueReaderCookie(w, r, reader.ID), http.StatusFound)
+}
+
+// telegramAuth 校验 Login Widget 回传的签名资料并登录。
+// 前端把 widget 的 user 对象原样 POST 过来（见 reader.js 的 oneTelegramAuth）。
+func (a *API) telegramAuth(w http.ResponseWriter, r *http.Request) {
+	if !a.TG.Enabled() {
+		httpx.NotFound(w)
+		return
+	}
+	// widget 回传是纯表单 POST，签名可被伪造重放——失败计数最必要的一路
+	ip := ratelimit.SourceKey(r)
+	if a.authFails.Blocked(ip) {
+		httpx.Error(w, http.StatusTooManyRequests, "登录失败次数过多，请稍后再试")
+		return
+	}
+	// 原样读 body：验签必须用收到的全部字段（官方规则），
+	// 身份字段再单独解一次
+	body, err := io.ReadAll(r.Body)
+	if err != nil {
+		httpx.BadRequest(w, "invalid body")
+		return
+	}
+	var fields map[string]any
+	if err := json.Unmarshal(body, &fields); err != nil || len(fields) == 0 {
+		a.authFails.Add(ip)
+		httpx.BadRequest(w, "invalid body")
+		return
+	}
+	if err := a.TG.VerifyMap(fields); err != nil {
+		a.authFails.Add(ip)
+		httpx.Error(w, http.StatusForbidden, "Telegram 登录校验失败，请重试")
+		return
+	}
+	var in auth.TelegramUser
+	if err := json.Unmarshal(body, &in); err != nil || in.IDInt() == 0 {
+		httpx.BadRequest(w, "invalid body")
+		return
+	}
+	handle := in.Username
+	if handle == "" {
+		// 没有公开 username 的用户用数字 id，保证 provider+handle 稳定唯一
+		handle = strconv.FormatInt(in.IDInt(), 10)
+	}
+	reader, err := a.Store.UpsertReader(model.Reader{
+		Provider: "telegram", Handle: handle, Name: in.DisplayName(),
+		AvatarURL: in.PhotoURL,
+		URL:       tgProfileURL(in.Username),
+	})
+	if err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+	// 会话同样落 httpOnly cookie，前端 POST 完刷新 /api/auth/me 即可见
+	token, _ := a.ReaderSessions.Issue(reader.ID)
+	http.SetCookie(w, &http.Cookie{Name: auth.ReaderCookie, Value: token, Path: "/",
+		HttpOnly: true, SameSite: http.SameSiteLaxMode, MaxAge: int((30 * 24 * time.Hour).Seconds())})
+	httpx.OK(w, map[string]any{"user": map[string]any{
+		"id": reader.ID, "name": reader.Name, "handle": reader.Handle,
+		"avatar_url": reader.AvatarURL, "url": reader.URL,
+		"provider": reader.Provider, "is_owner": false, "banned": reader.Banned,
+	}})
+}
+
+func tgProfileURL(username string) string {
+	if username == "" {
+		return ""
+	}
+	return "https://t.me/" + username
+}

backend/internal/api/sse.go

@@ -0,0 +1,52 @@
+// 评论变更的 SSE 端点：GET /api/comments/stream?post_id=N。
+// 事件里只有「这篇文章的评论变了」——不带任何内容，前端收到后
+// 自己 refetch。这样未审核的评论内容不会经 SSE 泄给围观者。
+package api
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+	"time"
+
+	"oneblog/internal/httpx"
+)
+
+// commentsStream 长连推送。EventSource 断线会自动重连，所以这里
+// 只需要：连上即发注释行、25s 心跳防代理掐线、事件触发刷新。
+func (a *API) commentsStream(w http.ResponseWriter, r *http.Request) {
+	postID, err := strconv.ParseInt(r.URL.Query().Get("post_id"), 10, 64)
+	if err != nil || postID <= 0 {
+		httpx.BadRequest(w, "post_id required")
+		return
+	}
+	fl, ok := w.(http.Flusher)
+	if !ok {
+		httpx.Error(w, http.StatusInternalServerError, "streaming unsupported")
+		return
+	}
+	w.Header().Set("Content-Type", "text/event-stream")
+	w.Header().Set("Cache-Control", "no-cache")
+	// 反向代理（nginx 等）默认缓冲会吞掉流式响应
+	w.Header().Set("X-Accel-Buffering", "no")
+
+	fmt.Fprint(w, ": connected\n\n")
+	fl.Flush()
+
+	ch, off := a.Hub.Subscribe(postID)
+	defer off()
+	heartbeat := time.NewTicker(25 * time.Second)
+	defer heartbeat.Stop()
+	for {
+		select {
+		case <-r.Context().Done():
+			return
+		case <-heartbeat.C:
+			fmt.Fprint(w, ": ping\n\n")
+			fl.Flush()
+		case <-ch:
+			fmt.Fprintf(w, "event: comments\ndata: {\"post_id\":%d}\n\n", postID)
+			fl.Flush()
+		}
+	}
+}

backend/internal/api/thumb.go

@@ -0,0 +1,142 @@
+// 缩略图懒生成：GET /uploads/thumb/{key}?w=960
+//
+// 首次请求从存储端读一次原图，缩放编码后落盘缓存（DataDir/.thumbnail_cache），
+// 之后直接供缓存——时间线首屏不再拉原图。非图片 / 解码失败 / 冷却期内
+// 一律 302 回原图：前端 <img> 拿 302 是无感的。
+package api
+
+import (
+	"errors"
+	"net/http"
+	"os"
+	"strconv"
+	"strings"
+
+	"oneblog/internal/httpx"
+	"oneblog/internal/model"
+	"oneblog/internal/storage"
+	"oneblog/internal/store"
+	"oneblog/internal/thumbs"
+)
+
+const (
+	thumbDefaultW = 960
+	thumbMinW     = 64
+	thumbMaxW     = 1600
+)
+
+func (a *API) ThumbHandler() http.Handler {
+	return http.HandlerFunc(a.thumb)
+}
+
+func (a *API) thumb(w http.ResponseWriter, r *http.Request) {
+	if a.Thumbs == nil {
+		httpx.NotFound(w)
+		return
+	}
+	key := strings.TrimPrefix(r.URL.Path, "/uploads/thumb/")
+	if key == "" || strings.Contains(key, "..") {
+		httpx.NotFound(w)
+		return
+	}
+	width := thumbDefaultW
+	if s := r.URL.Query().Get("w"); s != "" {
+		if n, err := strconv.Atoi(s); err == nil && n >= thumbMinW && n <= thumbMaxW {
+			width = n
+		}
+	}
+
+	f, err := a.Store.GetFileByKey(key)
+	if errors.Is(err, store.ErrNotFound) {
+		httpx.NotFound(w)
+		return
+	}
+	if err != nil {
+		httpx.ServerError(w, err)
+		return
+	}
+
+	if !thumbs.Supported(f.Mime) || f.SHA256 == "" {
+		a.thumbFallback(w, r, f)
+		return
+	}
+
+	// 快路径：缓存命中直接供（锁外）
+	if p := a.Thumbs.FindCached(f.SHA256, width); p != "" {
+		a.serveThumbFile(w, r, p, f)
+		return
+	}
+	// 冷却期：近期失败过，不再尝试
+	if a.Thumbs.FailedRecently(f.SHA256) {
+		a.thumbFallback(w, r, f)
+		return
+	}
+
+	// 慢路径：同 key+宽度并发只生成一次，后来者等锁后读缓存
+	lk := a.Thumbs.Lock(f.SHA256, width)
+	lk.Lock()
+	defer lk.Unlock()
+	if p := a.Thumbs.FindCached(f.SHA256, width); p != "" {
+		a.serveThumbFile(w, r, p, f)
+		return
+	}
+
+	rc, _, err := a.Blobs.Open(r.Context(), f.Key)
+	if err != nil {
+		a.Thumbs.MarkFailed(f.SHA256)
+		a.thumbFallback(w, r, f)
+		return
+	}
+	src, err := thumbs.ReadAllLimited(rc, thumbs.MaxSrcBytes)
+	rc.Close()
+	if err != nil {
+		a.Thumbs.MarkFailed(f.SHA256)
+		a.thumbFallback(w, r, f)
+		return
+	}
+	out, outMime, _, err := thumbs.Generate(src, f.Mime, width)
+	if err != nil {
+		a.Thumbs.MarkFailed(f.SHA256)
+		a.thumbFallback(w, r, f)
+		return
+	}
+	p, err := a.Thumbs.Put(f.SHA256, width, out, outMime)
+	if err != nil {
+		// 写缓存失败不拖累本次响应：产物就在内存里
+		a.serveThumbBytes(w, outMime, out, f)
+		return
+	}
+	a.serveThumbFile(w, r, p, f)
+}
+
+// thumbFallback 回原图：R2 + 公开域名是 302 直链，本地/未配域名回 /uploads/ 路由。
+func (a *API) thumbFallback(w http.ResponseWriter, r *http.Request, f model.File) {
+	http.Redirect(w, r, storage.FileURL(f.Store, f.Key, a.Cfg.UploadsPublicBase), http.StatusFound)
+}
+
+// serveThumbFile 用 ServeContent 供缓存文件：自带 Range/Last-Modified/304。
+func (a *API) serveThumbFile(w http.ResponseWriter, r *http.Request, path string, f model.File) {
+	fp, err := os.Open(path)
+	if err != nil {
+		a.thumbFallback(w, r, f)
+		return
+	}
+	defer fp.Close()
+	fi, err := fp.Stat()
+	if err != nil {
+		httpx.NotFound(w)
+		return
+	}
+	a.Thumbs.Touch(path) // 记一次「最近用过」，供容量闸按 LRU 淘汰
+	w.Header().Set("Cache-Control", "public, max-age=31536000, immutable")
+	http.ServeContent(w, r, path, fi.ModTime(), fp)
+}
+
+func (a *API) serveThumbBytes(w http.ResponseWriter, mime string, data []byte, f model.File) {
+	w.Header().Set("Content-Type", mime)
+	w.Header().Set("Content-Length", strconv.Itoa(len(data)))
+	w.Header().Set("ETag", `"`+f.SHA256+`"`)
+	w.Header().Set("Cache-Control", "public, max-age=31536000, immutable")
+	w.WriteHeader(http.StatusOK)
+	_, _ = w.Write(data)
+}

backend/internal/auth/auth.go

@@ -0,0 +1,172 @@
+// Package auth 提供评论区两侧的基础设施：读者会话（cookie one_reader，
+// payload 带 reader: 前缀，与后台令牌不可互换）和 GitHub OAuth 客户端。
+package auth
+
+import (
+	"context"
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// ReaderCookie 是读者会话的 cookie 名（与后台的 one_session 区分开）
+const ReaderCookie = "one_reader"
+
+// ReaderSessions 签发 / 校验读者会话令牌：
+// base64("reader:<readerID>:<expiryUnix>") + "." + HMAC-SHA256。
+type ReaderSessions struct {
+	secret []byte
+	ttl    time.Duration
+}
+
+func NewReaderSessions(secret string, ttl time.Duration) *ReaderSessions {
+	if ttl <= 0 {
+		ttl = 30 * 24 * time.Hour
+	}
+	return &ReaderSessions{secret: []byte(secret), ttl: ttl}
+}
+
+var ErrBadSession = errors.New("invalid reader session")
+
+func (s *ReaderSessions) Issue(readerID int64) (string, time.Time) {
+	exp := time.Now().Add(s.ttl)
+	payload := readerPayload(readerID, exp)
+	enc := base64.RawURLEncoding.EncodeToString([]byte(payload))
+	return enc + "." + s.sign(payload), exp
+}
+
+func (s *ReaderSessions) Verify(token string) (int64, error) {
+	parts := strings.Split(token, ".")
+	if len(parts) != 2 {
+		return 0, ErrBadSession
+	}
+	raw, err := base64.RawURLEncoding.DecodeString(parts[0])
+	if err != nil {
+		return 0, ErrBadSession
+	}
+	// 必须以 reader: 开头——后台令牌（base64("admin:<exp>")）复制过来也无效
+	if len(raw) < 10 || string(raw)[:7] != "reader:" {
+		return 0, ErrBadSession
+	}
+	// 余下是 "<id>:<exp>"
+	rest := string(raw)[7:]
+	i := strings.IndexByte(rest, ':')
+	if i <= 0 {
+		return 0, ErrBadSession
+	}
+	id, err := strconv.ParseInt(rest[:i], 10, 64)
+	if err != nil {
+		return 0, ErrBadSession
+	}
+	expUnix, err := strconv.ParseInt(rest[i+1:], 10, 64)
+	if err != nil {
+		return 0, ErrBadSession
+	}
+	if time.Now().After(time.Unix(expUnix, 0)) {
+		return 0, ErrBadSession
+	}
+	// 签名放在最后验证：payload 与 exp 都验过再比对 MAC
+	if !hmac.Equal([]byte(s.sign(string(raw))), []byte(parts[1])) {
+		return 0, ErrBadSession
+	}
+	return id, nil
+}
+
+func readerPayload(id int64, exp time.Time) string {
+	return "reader:" + strconv.FormatInt(id, 10) + ":" + strconv.FormatInt(exp.Unix(), 10)
+}
+
+func (s *ReaderSessions) sign(payload string) string {
+	mac := hmac.New(sha256.New, s.secret)
+	mac.Write([]byte(payload))
+	return base64.RawURLEncoding.EncodeToString(mac.Sum(nil))
+}
+
+// ---------- GitHub OAuth ----------
+
+// GitHub 持有 OAuth 应用凭据。没配 = GitHub 登录不开放，
+// 前台登录卡自动不显示该入口。
+type GitHub struct {
+	ClientID     string
+	ClientSecret string
+}
+
+func (g GitHub) Enabled() bool { return g.ClientID != "" && g.ClientSecret != "" }
+
+const (
+	githubAuthURL  = "https://github.com/login/oauth/authorize"
+	githubTokenURL = "https://github.com/login/oauth/access_token"
+	githubUserURL  = "https://api.github.com/user"
+)
+
+// LoginURL 生成 GitHub 授权页跳转地址
+func (g GitHub) LoginURL(redirectURI, state string) string {
+	v := url.Values{}
+	v.Set("client_id", g.ClientID)
+	v.Set("redirect_uri", redirectURI)
+	v.Set("scope", "read:user")
+	v.Set("state", state)
+	return githubAuthURL + "?" + v.Encode()
+}
+
+// GitHubUser 是 GitHub 用户接口里我们关心的字段
+type GitHubUser struct {
+	Login     string `json:"login"`
+	Name      string `json:"name"`
+	AvatarURL string `json:"avatar_url"`
+	HTMLURL   string `json:"html_url"`
+}
+
+// Exchange 用授权码换 access token
+func (g GitHub) Exchange(ctx context.Context, code, redirectURI string) (string, error) {
+	v := url.Values{}
+	v.Set("client_id", g.ClientID)
+	v.Set("client_secret", g.ClientSecret)
+	v.Set("code", code)
+	v.Set("redirect_uri", redirectURI)
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, githubTokenURL, strings.NewReader(v.Encode()))
+	if err != nil {
+		return "", err
+	}
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	req.Header.Set("Accept", "application/json")
+	res, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer res.Body.Close()
+	var out struct {
+		AccessToken string `json:"access_token"`
+	}
+	if err := json.NewDecoder(res.Body).Decode(&out); err != nil || out.AccessToken == "" {
+		return "", fmt.Errorf("github: token exchange failed")
+	}
+	return out.AccessToken, nil
+}
+
+// FetchUser 拉取 GitHub 用户资料
+func (g GitHub) FetchUser(ctx context.Context, accessToken string) (GitHubUser, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, githubUserURL, nil)
+	if err != nil {
+		return GitHubUser{}, err
+	}
+	req.Header.Set("Authorization", "Bearer "+accessToken)
+	res, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return GitHubUser{}, err
+	}
+	defer res.Body.Close()
+	var u GitHubUser
+	if err := json.NewDecoder(res.Body).Decode(&u); err != nil || u.Login == "" {
+		return GitHubUser{}, fmt.Errorf("github: fetch user failed")
+	}
+	return u, nil
+}

backend/internal/auth/google.go

@@ -0,0 +1,95 @@
+package auth
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+)
+
+// Google OAuth2（OIDC 简化用法：openid email profile 三个 scope，
+// userinfo 接口拿资料）。配置来源 .env 的 ONE_GOOGLE_CLIENT_ID / SECRET。
+const (
+	googleAuthURL  = "https://accounts.google.com/o/oauth2/v2/auth"
+	googleTokenURL = "https://oauth2.googleapis.com/token"
+	googleUserURL  = "https://openidconnect.googleapis.com/v1/userinfo"
+)
+
+type Google struct {
+	ClientID     string
+	ClientSecret string
+}
+
+func (g Google) Enabled() bool { return g.ClientID != "" && g.ClientSecret != "" }
+
+func (g Google) LoginURL(redirectURI, state string) string {
+	v := url.Values{}
+	v.Set("client_id", g.ClientID)
+	v.Set("redirect_uri", redirectURI)
+	v.Set("response_type", "code")
+	v.Set("scope", "openid email profile")
+	v.Set("state", state)
+	return googleAuthURL + "?" + v.Encode()
+}
+
+// GoogleUser 是 userinfo 接口里我们关心的字段。
+// sub 是 Google 账号的稳定唯一 id；邮箱需要已验证才当 handle 用。
+type GoogleUser struct {
+	Sub           string `json:"sub"`
+	Email         string `json:"email"`
+	EmailVerified bool   `json:"email_verified"`
+	Name          string `json:"name"`
+	Picture       string `json:"picture"`
+}
+
+func (g Google) Exchange(ctx context.Context, code, redirectURI string) (string, error) {
+	v := url.Values{}
+	v.Set("client_id", g.ClientID)
+	v.Set("client_secret", g.ClientSecret)
+	v.Set("code", code)
+	v.Set("redirect_uri", redirectURI)
+	v.Set("grant_type", "authorization_code")
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, googleTokenURL, strings.NewReader(v.Encode()))
+	if err != nil {
+		return "", err
+	}
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	res, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer res.Body.Close()
+	var out struct {
+		AccessToken string `json:"access_token"`
+	}
+	if err := json.NewDecoder(res.Body).Decode(&out); err != nil || out.AccessToken == "" {
+		return "", fmt.Errorf("google: token exchange failed")
+	}
+	return out.AccessToken, nil
+}
+
+func (g Google) FetchUser(ctx context.Context, accessToken string) (GoogleUser, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, googleUserURL, nil)
+	if err != nil {
+		return GoogleUser{}, err
+	}
+	req.Header.Set("Authorization", "Bearer "+accessToken)
+	res, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return GoogleUser{}, err
+	}
+	defer res.Body.Close()
+	if res.StatusCode != http.StatusOK {
+		return GoogleUser{}, fmt.Errorf("google: userinfo %d", res.StatusCode)
+	}
+	var u GoogleUser
+	if err := json.NewDecoder(res.Body).Decode(&u); err != nil {
+		return GoogleUser{}, err
+	}
+	if u.Sub == "" {
+		return GoogleUser{}, fmt.Errorf("google: userinfo missing sub")
+	}
+	return u, nil
+}

backend/internal/auth/telegram.go

@@ -0,0 +1,121 @@
+package auth
+
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// Telegram Login Widget：没有授权码流程，官方脚本把用户资料连同
+// hash 一起交给前端，前端 POST 到 /api/auth/telegram，后端用 bot
+// token 验签。算法见官方文档：secret = SHA256(bot_token)，
+// data-check-string 是除 hash 外所有收到的字段按 key 排序的 "k=v" 行。
+type Telegram struct {
+	Bot   string // bot 用户名（不含 @），下发给 widget
+	Token string // bot token，只用于验签，不出后端
+}
+
+func (t Telegram) Enabled() bool { return t.Bot != "" && t.Token != "" }
+
+// telegramAuthTTL 是验签窗口：widget 回传的 auth_date 超过它视为过期
+const telegramAuthTTL = 24 * time.Hour
+
+// TelegramUser 是 widget 回传的身份字段（验签通过后从中取）。
+// widget 把所有值都当字符串发（id 也不例外），但前端测试或手工
+// 调用可能发数字 —— FlexStr 两种都收。
+type TelegramUser struct {
+	ID        FlexStr `json:"id"`
+	FirstName string  `json:"first_name"`
+	LastName  string  `json:"last_name"`
+	Username  string  `json:"username"`
+	PhotoURL  string  `json:"photo_url"`
+}
+
+// FlexStr 兼容 JSON 里的字符串和数字
+type FlexStr string
+
+func (f *FlexStr) UnmarshalJSON(b []byte) error {
+	if len(b) > 0 && b[0] == '"' {
+		var s string
+		if err := json.Unmarshal(b, &s); err != nil {
+			return err
+		}
+		*f = FlexStr(s)
+		return nil
+	}
+	*f = FlexStr(b)
+	return nil
+}
+
+func (f FlexStr) Int64() (int64, error) {
+	return strconv.ParseInt(strings.Trim(string(f), `"`), 10, 64)
+}
+
+func (u TelegramUser) IDInt() int64 { id, _ := u.ID.Int64(); return id }
+
+func (u TelegramUser) DisplayName() string {
+	name := strings.TrimSpace(u.FirstName + " " + u.LastName)
+	if name == "" {
+		name = u.Username
+	}
+	return name
+}
+
+// normalize 把 JSON 值规整成 widget 发送时的字符串形态
+// （widget 的数值字段也是字符串，但调用方可能发真数字）
+func normalize(v any) string {
+	switch x := v.(type) {
+	case string:
+		return x
+	case float64:
+		return strconv.FormatInt(int64(x), 10)
+	case json.Number:
+		return x.String()
+	case bool:
+		return strconv.FormatBool(x)
+	default:
+		return fmt.Sprint(x)
+	}
+}
+
+// VerifyMap 校验 hash 与时效。fields 是前端原样 POST 的 JSON 对象；
+// exclude 里的 key（我们附加的非 Telegram 字段）不参与验签。
+func (t Telegram) VerifyMap(fields map[string]any, exclude ...string) error {
+	hash := normalize(fields["hash"])
+	if hash == "" {
+		return fmt.Errorf("telegram: missing hash")
+	}
+	authDate, err := strconv.ParseInt(normalize(fields["auth_date"]), 10, 64)
+	if err != nil || authDate == 0 || time.Since(time.Unix(authDate, 0)) > telegramAuthTTL {
+		return fmt.Errorf("telegram: auth_date expired")
+	}
+	skip := make(map[string]bool, len(exclude)+1)
+	skip["hash"] = true
+	for _, k := range exclude {
+		skip[k] = true
+	}
+	keys := make([]string, 0, len(fields))
+	for k := range fields {
+		if !skip[k] {
+			keys = append(keys, k)
+		}
+	}
+	sort.Strings(keys)
+	lines := make([]string, 0, len(keys))
+	for _, k := range keys {
+		lines = append(lines, k+"="+normalize(fields[k]))
+	}
+	secret := sha256.Sum256([]byte(t.Token))
+	mac := hmac.New(sha256.New, secret[:])
+	mac.Write([]byte(strings.Join(lines, "\n")))
+	if !hmac.Equal([]byte(hex.EncodeToString(mac.Sum(nil))), []byte(strings.ToLower(hash))) {
+		return fmt.Errorf("telegram: hash mismatch")
+	}
+	return nil
+}

backend/internal/config/config.go

@@ -21,6 +21,19 @@ type Config struct {
 	SiteURL     string
 	InsecureDev bool
 
+	// 评论区 GitHub 登录（OAuth App 凭据，站主在 GitHub 上创建后填入）
+	GitHubClientID     string
+	GitHubClientSecret string
+
+	// 评论区 Google 登录（OAuth 客户端凭据，Google Cloud Console 创建）
+	GoogleClientID     string
+	GoogleClientSecret string
+
+	// 评论区 Telegram 登录（Login Widget）：Bot 是用户名（不含 @，下发给
+	// 前端 widget），Token 用于验签。两者都要，缺一该入口不开放。
+	TelegramBot   string
+	TelegramToken string
+
 	// 对象存储（文件上传）。变量名与站主 .env 里的写法一致（站主已整理）：
 	//   S3Api     = R2 的 S3 API 端点（https://<账户ID>.r2.cloudflarestorage.com，
 	//               控制台 R2 概览可复制），上传走它 —— 公开域名收不了上传请求
@@ -28,12 +41,12 @@ type Config struct {
 	//   AccessKey / SecretAccessKey / Bucket = R2 凭据与桶名
 	// 五项齐全 → 上传走 R2、直链走 PublicURL；缺任一项回落本地磁盘
 	// （DataDir/uploads），并在启动日志提示一句。
-	StorageDriver      string // r2 | local
+	StorageDriver     string // r2 | local
-	S3Endpoint         string // env: S3Api
+	S3Endpoint        string // env: S3Api
-	R2Bucket           string
+	R2Bucket          string
-	R2AccessKey        string
+	R2AccessKey       string
-	R2SecretKey        string
+	R2SecretKey       string
-	UploadsPublicBase  string // env: PublicURL
+	UploadsPublicBase string // env: PublicURL
 }
 
 func getenv(k, def string) string {
@@ -122,6 +135,14 @@ func Load() (*Config, error) {
 		}
 	}
 
+	// 评论区 GitHub 登录（OAuth App 凭据，站主在 GitHub 上创建后填入）
+	c.GitHubClientID = getenv("ONE_GITHUB_CLIENT_ID", "")
+	c.GitHubClientSecret = getenv("ONE_GITHUB_CLIENT_SECRET", "")
+	c.GoogleClientID = getenv("ONE_GOOGLE_CLIENT_ID", "")
+	c.GoogleClientSecret = getenv("ONE_GOOGLE_CLIENT_SECRET", "")
+	c.TelegramBot = getenv("ONE_TELEGRAM_BOT", "")
+	c.TelegramToken = getenv("ONE_TELEGRAM_BOT_TOKEN", "")
+
 	return c, nil
 }
 

backend/internal/hub/hub.go

@@ -0,0 +1,57 @@
+// Package hub 是一个极简的进程内发布/订阅：按主题（文章 ID）广播
+// 「有变更」信号。订阅者只拿到一个空 struct 信号——不携带内容，
+// 消费方（SSE 前端）收到后自己 refetch，未审核的评论内容不会经由
+// 这条通道外泄。
+package hub
+
+import "sync"
+
+type Hub struct {
+	mu   sync.Mutex
+	subs map[int64]map[chan struct{}]struct{}
+}
+
+func New() *Hub {
+	return &Hub{subs: make(map[int64]map[chan struct{}]struct{})}
+}
+
+// Subscribe 订阅某主题；返回信号 channel 和退订函数。
+// channel 容量 1：订阅者处理不过来时新信号直接丢弃（合并刷新）。
+func (h *Hub) Subscribe(topic int64) (<-chan struct{}, func()) {
+	// nil hub（测试/未装配场景）静默降级：永远收不到信号的通道
+	if h == nil {
+		ch := make(chan struct{})
+		return ch, func() {}
+	}
+	ch := make(chan struct{}, 1)
+	h.mu.Lock()
+	if h.subs[topic] == nil {
+		h.subs[topic] = make(map[chan struct{}]struct{})
+	}
+	h.subs[topic][ch] = struct{}{}
+	h.mu.Unlock()
+	off := func() {
+		h.mu.Lock()
+		delete(h.subs[topic], ch)
+		if len(h.subs[topic]) == 0 {
+			delete(h.subs, topic)
+		}
+		h.mu.Unlock()
+	}
+	return ch, off
+}
+
+// Broadcast 唤醒某主题的全部订阅者；积压的订阅者不阻塞。
+func (h *Hub) Broadcast(topic int64) {
+	if h == nil {
+		return
+	}
+	h.mu.Lock()
+	defer h.mu.Unlock()
+	for ch := range h.subs[topic] {
+		select {
+		case ch <- struct{}{}:
+		default:
+		}
+	}
+}

backend/internal/linkmeta/charset.go

@@ -0,0 +1,107 @@
+package linkmeta
+
+import (
+	"bytes"
+	"strings"
+
+	"golang.org/x/text/encoding/htmlindex"
+	"golang.org/x/text/transform"
+)
+
+// charset.go 负责把响应字节解成 UTF-8 字符串。
+//
+// 为什么必须做：老派中文站点（以及不少论坛/院校站）仍在用 GBK/GB2312/Big5，
+// 直接当 UTF-8 读会得到一串替换字符，卡片标题就成了乱码。与其显示乱码，
+// 不如抓对——这是纯展示层的事，不该让站主去改对方的编码。
+
+// decode 按「HTTP 头声明 → 文档里的 <meta charset> → UTF-8」的优先级解码。
+// 已经是 UTF-8/ASCII 时原样返回，不绕转换管线。
+func decode(raw []byte, contentType string) string {
+	raw = bytes.TrimPrefix(raw, []byte("\ufeff")) // UTF-8 BOM
+	name := charsetFromHeader(contentType)
+	if name == "" {
+		// meta 标签本身是 ASCII（GBK/Big5 都是 ASCII 超集），
+		// 所以从未解码的原始字节里嗅探是安全的，只看文档开头。
+		name = charsetFromMeta(raw)
+	}
+	if name == "" || isUTF8(name) {
+		return string(raw)
+	}
+	enc, err := htmlindex.Get(name)
+	if err != nil {
+		return string(raw) // 没见过的字符名：按 UTF-8 尽力而为
+	}
+	out, _, err := transform.Bytes(enc.NewDecoder(), raw)
+	if err != nil && len(out) == 0 {
+		return string(raw)
+	}
+	return string(out)
+}
+
+func charsetFromHeader(ct string) string {
+	for _, part := range strings.Split(ct, ";") {
+		kv := strings.SplitN(strings.TrimSpace(part), "=", 2)
+		if len(kv) == 2 && strings.EqualFold(kv[0], "charset") {
+			return normalizeCharset(strings.Trim(kv[1], `"'`))
+		}
+	}
+	return ""
+}
+
+var (
+	metaCharset = []byte("charset=")
+)
+
+// charsetFromMeta 在文档开头找 <meta charset="x"> 或
+// <meta http-equiv="Content-Type" content="...; charset=x">。
+func charsetFromMeta(raw []byte) string {
+	head := raw
+	if len(head) > 2048 {
+		head = head[:2048] // 声明一定在前，不必扫全文
+	}
+	lower := bytes.ToLower(head)
+	i := bytes.Index(lower, metaCharset)
+	if i < 0 {
+		return ""
+	}
+	rest := head[i+len(metaCharset):]
+	if len(rest) == 0 {
+		return ""
+	}
+	// 值可能被引号包住；带引号时以配对引号收尾，不带时到引号/空格/;/  >  为止
+	// （不闭合的引号也当结束——http-equiv 写法里值是 content="...; charset=gbk"，
+	// 未加引号的 charset 值正好以那个收尾引号终止）
+	if q := rest[0]; q == '"' || q == '\'' {
+		rest = rest[1:]
+		if end := bytes.IndexByte(rest, q); end >= 0 {
+			rest = rest[:end]
+		}
+	} else if end := bytes.IndexAny(rest, `"' ;>`); end >= 0 {
+		rest = rest[:end]
+	}
+	return normalizeCharset(string(rest))
+}
+
+func normalizeCharset(s string) string {
+	s = strings.ToLower(strings.TrimSpace(s))
+	// HTML 标准与 IANA 的常见别名统一成 htmlindex 认得的名字
+	switch s {
+	case "gb2312", "gb_2312", "gb-2312":
+		return "gbk" // GBK 是 GB2312 的超集，按声明的 GB2312 解会漏字
+	case "x-sjis":
+		return "shift_jis"
+	case "euckr", "kr":
+		return "euc-kr"
+	case "utf8", "utf-8", "ascii", "us-ascii", "":
+		return s
+	}
+	return s
+}
+
+func isUTF8(name string) bool {
+	switch name {
+	case "", "utf-8", "utf8", "ascii", "us-ascii":
+		return true
+	}
+	return false
+}

backend/internal/linkmeta/charset_test.go

@@ -0,0 +1,122 @@
+package linkmeta
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"testing"
+
+	"golang.org/x/text/encoding/simplifiedchinese"
+)
+
+// gbkPage 把 UTF-8 字符串编成 GBK——老派中文站就是这么发的。
+func gbkPage(t *testing.T, s string) []byte {
+	t.Helper()
+	out, err := simplifiedchinese.GBK.NewEncoder().Bytes([]byte(s))
+	if err != nil {
+		t.Fatal(err)
+	}
+	return out
+}
+
+func TestDecodeGBKMetaCharset(t *testing.T) {
+	// 只在 <meta> 里声明，HTTP 头不带 charset——这是最常见的写法
+	doc := `<html><head><meta charset="gbk"><meta property="og:title" content="围棋职业棋士的直播间"></head></html>`
+	raw := gbkPage(t, doc)
+	got := parse(decode(raw, "text/html"), mustBase(t, "https://example.com/"))
+	if got.Title != "围棋职业棋士的直播间" {
+		t.Fatalf("GBK 未正确解码: %q", got.Title)
+	}
+}
+
+func TestDecodeHTTPHeaderWins(t *testing.T) {
+	doc := `<html><head><title>标题测试</title></head></html>`
+	raw := gbkPage(t, doc)
+	got := parse(decode(raw, `text/html; charset=GB2312`), mustBase(t, "https://example.com/"))
+	if got.Title != "标题测试" {
+		t.Fatalf("HTTP 头声明的字符集未生效: %q", got.Title)
+	}
+}
+
+func TestDecodeHTTPEquivMeta(t *testing.T) {
+	doc := `<html><head><meta http-equiv="Content-Type" content="text/html; charset=gbk"><title>中文标题</title></head></html>`
+	got := parse(decode(gbkPage(t, doc), "text/html"), mustBase(t, "https://example.com/"))
+	if got.Title != "中文标题" {
+		t.Fatalf("http-equiv 形式未识别: %q", got.Title)
+	}
+}
+
+func TestDecodePassthroughAndUnknown(t *testing.T) {
+	utf8 := `<html><head><title>已经是 UTF-8</title></head></html>`
+	if got := decode([]byte(utf8), "text/html; charset=utf-8"); got != utf8 {
+		t.Error("UTF-8 不该走转换管线")
+	}
+	if got := decode([]byte(utf8), "text/html; charset=bogus-9999"); got != utf8 {
+		t.Error("认不出的字符集应退回原始字节而不是报错")
+	}
+	if got := decode([]byte("\ufeff"+utf8), "text/html"); got != utf8 {
+		t.Error("BOM 应被剥掉")
+	}
+}
+
+func TestCharsetFromHeader(t *testing.T) {
+	cases := map[string]string{
+		`text/html; charset=UTF-8`:  "utf-8",
+		`text/html;charset="gbk"`:   "gbk",
+		`text/html; charset=GB2312`: "gbk", // 别名归一：GBK 是超集
+		`text/html`:                 "",
+	}
+	for in, want := range cases {
+		if got := charsetFromHeader(in); got != want {
+			t.Errorf("charsetFromHeader(%q) = %q, want %q", in, got, want)
+		}
+	}
+}
+
+func TestCharsetFromMeta(t *testing.T) {
+	cases := map[string]string{
+		`<html><head><meta charset='Big5'>`:                                    "big5",
+		`<html><head><meta charset=gb2312>`:                                    "gbk",
+		`<meta http-equiv="Content-Type" content="text/html; charset=x-sjis">`: "shift_jis",
+		`<html><head><title>没有声明</title>`:                                      "",
+	}
+	for in, want := range cases {
+		if got := charsetFromMeta([]byte(in)); got != want {
+			t.Errorf("charsetFromMeta(%q) = %q, want %q", in, got, want)
+		}
+	}
+}
+
+// 端到端：真发一个 GBK 页面（HTTP 头故意不写 charset），确认整条链路出正确卡片。
+func TestFetcherDecodesGBKEndToEnd(t *testing.T) {
+	doc := `<html><head><meta charset="gbk"><meta property="og:title" content="鱼妹妹下棋"><meta property="og:site_name" content="某中文站"></head>`
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "text/html") // 不声明 charset，逼它去嗅 meta
+		fmt.Fprint(w, string(gbkPage(t, doc)))
+	}))
+	defer srv.Close()
+
+	f := &Fetcher{Dial: func(ctx context.Context, network, addr string) (net.Conn, error) {
+		var d net.Dialer
+		return d.DialContext(ctx, network, addr)
+	}}
+	c, err := f.Fetch(context.Background(), srv.URL)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if c.Title != "鱼妹妹下棋" || c.Site != "某中文站" {
+		t.Fatalf("card=%+v", c)
+	}
+}
+
+func mustBase(t *testing.T, s string) *url.URL {
+	t.Helper()
+	u, err := url.Parse(s)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return u
+}

backend/internal/linkmeta/linkmeta.go

@@ -0,0 +1,242 @@
+// Package linkmeta 从正文里的链接抓一份「链接卡片」素材：标题、描述、站点名、封面图。
+//
+// 抓取由站主写作时触发（不是读者请求触发），但目标地址仍是任意公网 URL，
+// 所以按对外抓取的标准对待：只放行 http/https、限时限量限跳转，
+// 并在拨号那一刻解析并拒绝内网地址——防的是「服务器自己打自己」这类 SSRF，
+// 以及 DNS 先返回公网 IP、拨号时换成内网 IP 的重绑定把戏。
+package linkmeta
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"net/url"
+	"regexp"
+	"strings"
+	"time"
+
+	"oneblog/internal/model"
+)
+
+const (
+	// maxBody 只读文档开头就够拿到 <head>，多一个字节都不多读。
+	maxBody = 512 << 10
+	// maxRedirects 跳转链上限。
+	maxRedirects = 3
+	// 浏览器形态的 UA：不少站点（X、微博、部分门户）对未知爬虫 UA 给的
+	// og 元数据不全或直接拒绝，对浏览器 UA 则照常输出 <head> 里的标签。
+	userAgent = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36"
+)
+
+// Card 是抓取结果的数据形状；定义在 model 里（要落库、要给前端），
+// 这里用别名保持本包的写法。
+type Card = model.LinkCard
+
+var (
+	urlRe       = regexp.MustCompile(`https?://[^\s<>"'\)\]]+`)
+	trailingCut = ".,;:!?、。）]》」》"
+)
+
+// FirstURL 取正文里第一个 http(s) 链接（Markdown 原文，含代码块里的也算，
+// 站主自己不会在代码块里贴想展示的链接）。没有则空串。
+func FirstURL(md string) string {
+	m := urlRe.FindString(md)
+	if m == "" {
+		return ""
+	}
+	return strings.TrimRight(m, trailingCut)
+}
+
+// Fetcher 抓取器。Dial 为 nil 时用带 SSRF 防护的默认拨号器；
+// 测试里注入普通拨号器才能打到 httptest 的回环地址（默认会被拦掉）。
+type Fetcher struct {
+	Dial    func(ctx context.Context, network, addr string) (net.Conn, error)
+	Timeout time.Duration // 0 = 默认 5s
+}
+
+// Fetch 用默认安全拨号器抓 rawURL 的元信息。ctx 控制整体时限。
+func Fetch(ctx context.Context, rawURL string) (*Card, error) {
+	return (&Fetcher{}).Fetch(ctx, rawURL)
+}
+
+// Fetch 抓 rawURL 的元信息。
+func (f *Fetcher) Fetch(ctx context.Context, rawURL string) (*Card, error) {
+	u, err := url.Parse(strings.TrimSpace(rawURL))
+	if err != nil {
+		return nil, fmt.Errorf("linkmeta: bad url: %w", err)
+	}
+	if u.Scheme != "http" && u.Scheme != "https" {
+		return nil, fmt.Errorf("linkmeta: scheme %q not allowed", u.Scheme)
+	}
+	if u.Host == "" {
+		return nil, errors.New("linkmeta: empty host")
+	}
+
+	client := f.client()
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, u.String(), nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("User-Agent", userAgent)
+	req.Header.Set("Accept", "text/html,application/xhtml+xml;q=0.9,*/*;q=0.5")
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("linkmeta: fetch: %w", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 300 {
+		return nil, fmt.Errorf("linkmeta: status %d", resp.StatusCode)
+	}
+	if ct := resp.Header.Get("Content-Type"); !strings.Contains(ct, "text/html") {
+		return nil, fmt.Errorf("linkmeta: not html (%q)", ct)
+	}
+
+	body, err := io.ReadAll(io.LimitReader(resp.Body, maxBody))
+	if err != nil {
+		return nil, fmt.Errorf("linkmeta: read: %w", err)
+	}
+	final := resp.Request.URL // 跟完跳转后的最终地址
+	card := parse(decode(body, resp.Header.Get("Content-Type")), final)
+	if card.Empty() {
+		return nil, errors.New("linkmeta: no usable metadata")
+	}
+	return card, nil
+}
+
+// client 组装带 SSRF 防护的 HTTP 客户端（Fetch 与 FetchBytes 共用）
+func (f *Fetcher) client() *http.Client {
+	dial := f.Dial
+	if dial == nil {
+		dial = safeDial
+	}
+	timeout := f.Timeout
+	if timeout <= 0 {
+		timeout = 5 * time.Second
+	}
+	return &http.Client{
+		Transport: &http.Transport{
+			DialContext:         dial,
+			TLSHandshakeTimeout: 3 * time.Second,
+			// 每个跳转目标都过一遍 dial（transport 会复用），无需额外校验
+			ForceAttemptHTTP2: false,
+		},
+		Timeout:       timeout,
+		CheckRedirect: limitRedirects,
+	}
+}
+
+// FetchBytes 抓二进制内容（外链图片转存用）：与 Fetch 共用同一套
+// SSRF 防护与跳转限制，字节数有 maxBytes 硬上限。
+// 返回内容与 Content-Type（响应头缺失时用内容嗅探兜底）。
+func FetchBytes(ctx context.Context, rawURL string, maxBytes int64) ([]byte, string, error) {
+	return (&Fetcher{}).fetchBytes(ctx, rawURL, maxBytes)
+}
+
+func (f *Fetcher) fetchBytes(ctx context.Context, rawURL string, maxBytes int64) ([]byte, string, error) {
+	u, err := url.Parse(strings.TrimSpace(rawURL))
+	if err != nil {
+		return nil, "", fmt.Errorf("linkmeta: bad url: %w", err)
+	}
+	if u.Scheme != "http" && u.Scheme != "https" {
+		return nil, "", fmt.Errorf("linkmeta: scheme %q not allowed", u.Scheme)
+	}
+	if u.Host == "" {
+		return nil, "", errors.New("linkmeta: empty host")
+	}
+	client := f.client()
+	// 二进制传输放宽时限：大图慢链路 5 秒的元信息默认值不够用
+	if f.Timeout <= 0 {
+		client.Timeout = 30 * time.Second
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, u.String(), nil)
+	if err != nil {
+		return nil, "", err
+	}
+	req.Header.Set("User-Agent", userAgent)
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, "", fmt.Errorf("linkmeta: fetch: %w", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 300 {
+		return nil, "", fmt.Errorf("linkmeta: status %d", resp.StatusCode)
+	}
+	data, err := io.ReadAll(io.LimitReader(resp.Body, maxBytes+1))
+	if err != nil {
+		return nil, "", fmt.Errorf("linkmeta: read: %w", err)
+	}
+	if int64(len(data)) > maxBytes {
+		return nil, "", fmt.Errorf("linkmeta: exceeds %d bytes", maxBytes)
+	}
+	ct := resp.Header.Get("Content-Type")
+	if ct == "" {
+		ct = http.DetectContentType(data)
+	}
+	return data, ct, nil
+}
+
+func limitRedirects(req *http.Request, via []*http.Request) error {
+	if len(via) > maxRedirects {
+		return fmt.Errorf("linkmeta: too many redirects")
+	}
+	if req.URL.Scheme != "http" && req.URL.Scheme != "https" {
+		return fmt.Errorf("linkmeta: redirect to %q", req.URL.Scheme)
+	}
+	return nil
+}
+
+// safeDial 解析域名后逐个筛掉内网地址，再直接拨那个 IP：
+// 校验和连接之间不再重新解析，DNS 重绑定就没有窗口。
+func safeDial(ctx context.Context, network, addr string) (net.Conn, error) {
+	host, port, err := net.SplitHostPort(addr)
+	if err != nil {
+		return nil, err
+	}
+	var d net.Dialer
+	if ip := net.ParseIP(host); ip != nil {
+		if blocked(ip) {
+			return nil, fmt.Errorf("linkmeta: %s is not a public address", ip)
+		}
+		return d.DialContext(ctx, network, addr)
+	}
+	ips, err := d.Resolver.LookupIPAddr(ctx, host)
+	if err != nil {
+		return nil, err
+	}
+	var lastErr error
+	for _, ia := range ips {
+		if blocked(ia.IP) {
+			continue
+		}
+		conn, err := d.DialContext(ctx, network, net.JoinHostPort(ia.IP.String(), port))
+		if err == nil {
+			return conn, nil
+		}
+		lastErr = err
+	}
+	if lastErr != nil {
+		return nil, lastErr
+	}
+	return nil, fmt.Errorf("linkmeta: no public address for %s", host)
+}
+
+// blocked 报告 IP 是否属于不该由本站去连的地址段。
+func blocked(ip net.IP) bool {
+	if ip == nil || ip.IsUnspecified() || ip.IsLoopback() || ip.IsPrivate() ||
+		ip.IsLinkLocalUnicast() || ip.IsLinkLocalMulticast() || ip.IsInterfaceLocalMulticast() ||
+		ip.IsMulticast() {
+		return true
+	}
+	// 运营商级 NAT 与 6to4 前缀：IsPrivate 不覆盖，但同样不该出现在公网抓取里
+	if ip4 := ip.To4(); ip4 != nil {
+		return ip4[0] == 100 && ip4[1] >= 64 && ip4[1] <= 127 // 100.64.0.0/10
+	}
+	if ip.To16() != nil {
+		return ip[0] == 0x20 || ip[0] == 0x3f // 2001::/32 Teredo、3ffe::/16 等保留段
+	}
+	return false
+}

backend/internal/linkmeta/linkmeta_test.go

@@ -0,0 +1,191 @@
+package linkmeta
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestFirstURL(t *testing.T) {
+	cases := map[string]string{
+		"看看 https://example.com/a?x=1 这个":       "https://example.com/a?x=1",
+		"[Go 语言](https://go.dev/doc) 官方文档":      "https://go.dev/doc",
+		"结尾标点要剪掉 https://a.cn/page。":            "https://a.cn/page",
+		"没有链接就是空":                               "",
+		"两个 https://first.cn https://second.cn": "https://first.cn",
+		"裸 www.example.com 不算":                  "",
+	}
+	for in, want := range cases {
+		if got := FirstURL(in); got != want {
+			t.Errorf("FirstURL(%q) = %q, want %q", in, got, want)
+		}
+	}
+}
+
+func TestParsePriority(t *testing.T) {
+	doc := `<html><head>
+	<title>兜底标题</title>
+	<meta name="description" content="兜底描述">
+	<meta property="og:title" content="OG 标题">
+	<meta content="OG 描述" property="og:description">
+	<meta name="og:site_name" content="示例站">
+	<meta property="og:image" content="/pics/a.png">
+	</head><body><p>正文里的 <b>标签</b> 不该被当成标题</p></body></html>`
+	base, _ := url.Parse("https://example.com/post/1")
+	c := parse(doc, base)
+
+	if c.Title != "OG 标题" {
+		t.Errorf("title=%q 应优先 og:title", c.Title)
+	}
+	if c.Desc != "OG 描述" {
+		t.Errorf("desc=%q", c.Desc)
+	}
+	if c.Site != "示例站" {
+		t.Errorf("site=%q", c.Site)
+	}
+	if c.Image != "https://example.com/pics/a.png" {
+		t.Errorf("相对图片未补全: %q", c.Image)
+	}
+}
+
+func TestParseFallsBackToTitleTag(t *testing.T) {
+	base, _ := url.Parse("https://example.com/")
+	c := parse(`<html><head><title> 只有
+	标题 </title></head></html>`, base)
+	if c.Title != "只有 标题" {
+		t.Errorf("title=%q", c.Title)
+	}
+	if c.Site != "example.com" {
+		t.Errorf("site=%q 应退回主机名", c.Site)
+	}
+}
+
+func TestParseUnescapesEntities(t *testing.T) {
+	base, _ := url.Parse("https://example.com/")
+	c := parse(`<head><meta property="og:title" content="Tom &amp; Jerry &#34;quoted&#34;"></head>`, base)
+	if c.Title != `Tom & Jerry "quoted"` {
+		t.Errorf("title=%q", c.Title)
+	}
+}
+
+func TestBlockedAddresses(t *testing.T) {
+	want := map[string]bool{
+		"127.0.0.1":                          true,
+		"10.0.3.5":                           true,
+		"172.16.0.1":                         true,
+		"192.168.1.1":                        true,
+		"169.254.169.254":                    true, // 云元数据
+		"100.64.0.1":                         true, // CGNAT
+		"::1":                                true,
+		"fe80::1":                            true,
+		"fc00::1":                            true, // ULA
+		"93.184.216.34":                      false,
+		"2606:2800:220:1:248:1893:25c8:1946": false,
+	}
+	for s, wantBlocked := range want {
+		ip := net.ParseIP(s)
+		if ip == nil {
+			t.Fatalf("bad test ip %q", s)
+		}
+		if got := blocked(ip); got != wantBlocked {
+			t.Errorf("blocked(%s) = %v, want %v", s, got, wantBlocked)
+		}
+	}
+}
+
+// 默认拨号器必须拒掉回环地址——httptest 的服务就在 127.0.0.1，
+// 这条同时验证了「防护生效」和「测试用的注入通道确实是必要的」。
+func TestDefaultFetchRejectsLoopback(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprint(w, `<html><head><title>x</title></head></html>`)
+	}))
+	defer srv.Close()
+
+	_, err := Fetch(context.Background(), srv.URL)
+	if err == nil {
+		t.Fatal("默认 Fetcher 竟然后到了回环地址，SSRF 防护形同虚设")
+	}
+	if !strings.Contains(err.Error(), "not a public address") && !strings.Contains(err.Error(), "no public address") {
+		t.Fatalf("err=%v，应因内网地址被拒", err)
+	}
+}
+
+func TestFetcherParsesRealPage(t *testing.T) {
+	var gotUA, gotAccept string
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		gotUA, gotAccept = r.Header.Get("User-Agent"), r.Header.Get("Accept")
+		if r.URL.Path == "/nope" {
+			w.WriteHeader(http.StatusNotFound)
+			return
+		}
+		w.Header().Set("Content-Type", "text/html; charset=utf-8")
+		fmt.Fprint(w, `<html><head><meta property="og:title" content="标题"><meta property="og:image" content="https://cdn.example/i.png"></head>`)
+	}))
+	defer srv.Close()
+
+	f := &Fetcher{Dial: func(ctx context.Context, network, addr string) (net.Conn, error) {
+		var d net.Dialer
+		return d.DialContext(ctx, network, addr)
+	}, Timeout: 2 * time.Second}
+
+	c, err := f.Fetch(context.Background(), srv.URL+"/page")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if c.Title != "标题" || c.Image != "https://cdn.example/i.png" {
+		t.Fatalf("card=%+v", c)
+	}
+	if !strings.HasPrefix(c.URL, srv.URL) {
+		t.Errorf("url=%q", c.URL)
+	}
+	if gotUA != userAgent {
+		t.Errorf("ua=%q", gotUA)
+	}
+	if !strings.Contains(gotAccept, "text/html") {
+		t.Errorf("accept=%q", gotAccept)
+	}
+	if _, err := f.Fetch(context.Background(), srv.URL+"/nope"); err == nil {
+		t.Error("404 应报错")
+	}
+}
+
+func TestFetchRejectsNonHTMLAndBadScheme(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/octet-stream")
+		w.Write([]byte("binary"))
+	}))
+	defer srv.Close()
+
+	f := &Fetcher{Dial: func(ctx context.Context, network, addr string) (net.Conn, error) {
+		var d net.Dialer
+		return d.DialContext(ctx, network, addr)
+	}}
+	if _, err := f.Fetch(context.Background(), srv.URL); err == nil {
+		t.Error("非 HTML 应拒绝")
+	}
+	if _, err := f.Fetch(context.Background(), "ftp://example.com/x"); err == nil {
+		t.Error("非 http(s) 协议应拒绝")
+	}
+	if _, err := f.Fetch(context.Background(), "not a url"); err == nil {
+		t.Error("坏 URL 应报错")
+	}
+}
+
+func TestCardEmpty(t *testing.T) {
+	if !(&Card{URL: "https://x.cn"}).Empty() {
+		t.Error("只有 URL 不算有内容")
+	}
+	if (&Card{URL: "https://x.cn", Title: "t"}).Empty() {
+		t.Error("有标题不该判空")
+	}
+	var nilCard *Card
+	if !nilCard.Empty() {
+		t.Error("nil 应判空")
+	}
+}

backend/internal/linkmeta/parse.go

@@ -0,0 +1,106 @@
+package linkmeta
+
+import (
+	"html"
+	"net/url"
+	"regexp"
+	"strings"
+)
+
+var (
+	headRe  = regexp.MustCompile(`(?is)<head[^>]*>(.*?)</head>`)
+	metaRe  = regexp.MustCompile(`(?is)<meta\b[^>]*?>`)
+	attrRe  = regexp.MustCompile(`(?is)\b(property|name|http-equiv|content)\s*=\s*("([^"]*)"|'([^']*)'|([^\s>"']+))`)
+	titleRe = regexp.MustCompile(`(?is)<title[^>]*>(.*?)</title>`)
+	tagRe   = regexp.MustCompile(`(?s)<[^>]*>`)
+	wsRe    = regexp.MustCompile(`\s+`)
+)
+
+// parse 从 HTML 里挑出卡片字段。优先 Open Graph，其次 Twitter Card，最后
+// 退到 <title> 与 description——绝大多数站点至少满足其中一个。
+func parse(doc string, base *url.URL) *Card {
+	c := &Card{URL: base.String(), Site: base.Hostname()}
+
+	head := doc
+	if m := headRe.FindStringSubmatch(doc); m != nil {
+		head = m[1]
+	} else if len(head) > 64<<10 {
+		head = head[:64<<10] // 没有闭合 <head> 时也别整篇扫
+	}
+
+	// 同一个 key 出现多次时先出现的赢（后面的往往是重复声明）
+	meta := map[string]string{}
+	for _, tag := range metaRe.FindAllString(head, -1) {
+		key, val := metaTag(tag)
+		if key == "" || val == "" {
+			continue
+		}
+		if _, seen := meta[key]; !seen {
+			meta[key] = val
+		}
+	}
+
+	c.Title = first(meta["og:title"], meta["twitter:title"])
+	if c.Title == "" {
+		if m := titleRe.FindStringSubmatch(head); m != nil {
+			c.Title = clean(m[1])
+		}
+	}
+	c.Desc = first(meta["og:description"], meta["twitter:description"], meta["description"])
+	if site := meta["og:site_name"]; site != "" {
+		c.Site = site
+	}
+	if img := first(meta["og:image"], meta["twitter:image"], meta["twitter:image:src"]); img != "" {
+		c.Image = resolve(img, base)
+	}
+	// X（Twitter）对非白名单爬虫只回一张全站通用灰图占位符，
+	// 拿它当封面只会显示一张无意义的底图——当作没有图处理。
+	// 真推文图只发给 Twitterbot 等白名单 UA，服务端拿不到，不硬来。
+	if strings.Contains(c.Image, "abs.twimg.com/rweb/ssr/default") {
+		c.Image = ""
+	}
+	return c
+}
+
+// metaTag 从单个 <meta> 标签里取 (key, content)，属性顺序不限。
+func metaTag(tag string) (string, string) {
+	var key, val string
+	for _, a := range attrRe.FindAllStringSubmatch(tag, -1) {
+		v := first(a[3], a[4], a[5])
+		switch strings.ToLower(a[1]) {
+		case "property", "name", "http-equiv":
+			key = strings.ToLower(v)
+		case "content":
+			val = v
+		}
+	}
+	return key, clean(val)
+}
+
+// clean 去标签、解实体、压空白：抓来的文本可能带内联标签或连续换行。
+func clean(s string) string {
+	s = html.UnescapeString(tagRe.ReplaceAllString(s, " "))
+	return strings.TrimSpace(wsRe.ReplaceAllString(s, " "))
+}
+
+// resolve 把相对的图片地址补成绝对 URL；解析不了就丢掉这个字段。
+func resolve(ref string, base *url.URL) string {
+	ref = strings.TrimSpace(ref)
+	if ref == "" || strings.HasPrefix(ref, "data:") {
+		return ""
+	}
+	u, err := url.Parse(ref)
+	if err != nil {
+		return ""
+	}
+	return base.ResolveReference(u).String()
+}
+
+func first(vals ...string) string {
+	for _, v := range vals {
+		if v != "" {
+			return v
+		}
+	}
+	return ""
+}

backend/internal/model/model.go

@@ -29,6 +29,26 @@ type Post struct {
 	// ContentLen 是正文字符数：列表接口不返回全文，但后台列表要显示字数。
 	ContentLen int64    `json:"content_len"`
 	Tags       []string `json:"tags"`
+	// Images 是短文配图（快发盒上传，≤4 张，Twitter 式网格展示），
+	// 以 JSON 数组存在 posts.images 列里，正文 content_md 不含它们。
+	Images []string `json:"images"`
+	// LinkCard 是正文里第一个外链的预览卡片（发布时抓一次，存 posts.link_card）。
+	// nil = 没有链接或抓取失败，前台不渲染卡片。
+	LinkCard *LinkCard `json:"link_card,omitempty"`
+}
+
+// LinkCard 是链接预览卡片：由 internal/linkmeta 抓取，以 JSON 存在 posts 表里。
+type LinkCard struct {
+	URL   string `json:"url"`
+	Title string `json:"title,omitempty"`
+	Desc  string `json:"desc,omitempty"`
+	Site  string `json:"site,omitempty"`
+	Image string `json:"image,omitempty"`
+}
+
+// Empty 报告卡片有没有可展示的字段（只有 URL 不算）。
+func (c *LinkCard) Empty() bool {
+	return c == nil || (c.Title == "" && c.Desc == "" && c.Image == "")
 }
 
 type PostInput struct {
@@ -42,6 +62,10 @@ type PostInput struct {
 	PublishedAt    string   `json:"published_at"`
 	Tags           []string `json:"tags"`
 	ReadingMinutes *int     `json:"reading_minutes"`
+	// Images 是短文配图 URL（快发盒上传），nil = 不修改、空数组 = 清空
+	Images []string `json:"images"`
+	// LinkCard 由服务端在保存时按正文内容重算（站主不必发这个字段）
+	LinkCard *LinkCard `json:"link_card,omitempty"`
 }
 
 type Tag struct {
@@ -123,6 +147,14 @@ type FilePage struct {
 	Size  int    `json:"size"`
 }
 
+// CommentPage 是后台评论管理的分页容器（含文章标题与发表者）。
+type CommentPage struct {
+	Items []Comment `json:"items"`
+	Total int       `json:"total"`
+	Page  int       `json:"page"`
+	Size  int       `json:"size"`
+}
+
 // Dashboard is the snapshot rendered on /admin (homepage).
 type Dashboard struct {
 	TotalPosts       int           `json:"total_posts"`
@@ -161,6 +193,10 @@ type Settings struct {
 	// SocialLinks 以 JSON 数组形式存在 settings KV 里（key: social_links），
 	// 解析失败/为空时前台拿到空数组，区块自动隐藏。
 	SocialLinks []SocialLink `json:"social_links"`
+	// 评论开关（comments_enabled）：关着时前台整个评论区不渲染。
+	CommentsEnabled bool `json:"comments_enabled"`
+	// 审核开关（comments_review）：开着时新评论先进「待审」，站主通过后才公开。
+	CommentsReview bool `json:"comments_review"`
 	// LightSkinID is the front-end skin used when the client (or system)
 	// prefers light. Valid values: paper / sage / rose.
 	// Dark side is fixed to ink for now — kept implicit so we can add
@@ -186,3 +222,38 @@ type Settings struct {
 	// sanitizing it would only break the snippet.
 	CustomJS string `json:"custom_js"`
 }
+
+// Reader 是评论区的登录用户（GitHub OAuth）。Banned = 禁言中。
+type Reader struct {
+	ID        int64  `json:"id"`
+	Provider  string `json:"provider"`
+	Handle    string `json:"handle"`
+	Name      string `json:"name"`
+	AvatarURL string `json:"avatar_url"`
+	URL       string `json:"url"`
+	Banned    bool   `json:"banned"`
+	// CommentCount 是累计评论数（后台用户列表展示用）
+	CommentCount int64  `json:"comment_count"`
+	CreatedAt    string `json:"created_at"`
+}
+
+// Comment 是一条评论。回复扁平存储（parent_id/root_id），渲染时挂到 replies。
+// User 是发表者快照；is_deleted = 软删（留壳显示「已删除」，保住楼层上下文）。
+type Comment struct {
+	ID         int64     `json:"id"`
+	PostID     int64     `json:"post_id"`
+	ParentID   int64     `json:"parent_id"`
+	RootID     int64     `json:"root_id"`
+	User       *Reader   `json:"user"`
+	UserID     int64     `json:"user_id"`
+	BodyMd     string    `json:"body_md"`
+	BodyHTML   string    `json:"body_html"`
+	Status     string    `json:"status"`
+	IsDeleted  bool      `json:"is_deleted"`
+	CreatedAt  string    `json:"created_at"`
+	EditedAt   string    `json:"edited_at"`
+	Replies    []Comment `json:"replies"`
+	ReplyCount int       `json:"reply_count"`
+	// PostTitle 是文章标题（后台评论列表联表带出，仅管理接口填充）
+	PostTitle string `json:"post_title"`
+}

backend/internal/ratelimit/ratelimit.go

@@ -0,0 +1,73 @@
+// Package ratelimit 是一个极小的按来源 IP 滑动窗口限速器，
+// 后台登录与读者登录 / 评论写入共用同一实现。
+// 只计失败/写入这类「不该高频」的事件；键取连接层地址，
+// X-Forwarded-For 可伪造，不作为限速键。
+package ratelimit
+
+import (
+	"net"
+	"net/http"
+	"sync"
+	"time"
+)
+
+type Window struct {
+	mu     sync.Mutex
+	hits   map[string][]time.Time
+	max    int
+	window time.Duration
+}
+
+func New(max int, window time.Duration) *Window {
+	return &Window{hits: make(map[string][]time.Time), max: max, window: window}
+}
+
+// Blocked 报告 key 在窗口内是否已达上限。
+func (l *Window) Blocked(key string) bool {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	return len(l.recent(key, time.Now())) >= l.max
+}
+
+// Add 记录一次事件。
+func (l *Window) Add(key string) {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	now := time.Now()
+	l.hits[key] = append(l.recent(key, now), now)
+}
+
+// Reset 清空 key 的计数（如登录成功后）。
+func (l *Window) Reset(key string) {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	delete(l.hits, key)
+}
+
+// recent 返回窗口内的事件时间；调用方必须持有 l.mu。
+func (l *Window) recent(key string, now time.Time) []time.Time {
+	hs := l.hits[key]
+	cut := now.Add(-l.window)
+	i := 0
+	for ; i < len(hs); i++ {
+		if hs[i].After(cut) {
+			break
+		}
+	}
+	if i > 0 {
+		hs = hs[i:]
+		l.hits[key] = hs
+	}
+	if len(hs) == 0 {
+		delete(l.hits, key)
+	}
+	return hs
+}
+
+// SourceKey 取连接层来源地址（IPv6 去掉端口）。
+func SourceKey(r *http.Request) string {
+	if host, _, err := net.SplitHostPort(r.RemoteAddr); err == nil {
+		return host
+	}
+	return r.RemoteAddr
+}

backend/internal/render/pangu.go

@@ -0,0 +1,92 @@
+// 盘古之白：在 CJK 与拉丁字母/数字之间补一个空格，中文混排的阅读观感
+// 差别很大（「把MVP搬进仓库」→「把 MVP 搬进仓库」）。
+// 在 HTML 层做：标签原样保留，<code>/<pre>/<script>/<style> 内的文本
+// 一律不动（代码语义容不得我们加空格），其余文本段做补空格。
+package render
+
+import (
+	"regexp"
+	"strings"
+	"unicode"
+)
+
+var tagRe = regexp.MustCompile(`<[^>]*>`)
+
+// code 上下文里的文本不处理
+var codeOpenRe = regexp.MustCompile(`(?i)<(code|pre|script|style|kbd|samp)\b[^>]*>`)
+var codeCloseRe = regexp.MustCompile(`(?i)</(code|pre|script|style|kbd|samp)>`)
+
+// CJK 统一表意区 + 扩展A/兼容 + 日文假名已在 2E80-9FFF 覆盖，
+// 再补全角标点区（FF00-FFEF）与 CJK 标点（3000-303F）
+var cjkRe = regexp.MustCompile(`[\x{2E80}-\x{9FFF}\x{3000}-\x{303F}\x{F900}-\x{FAFF}\x{FF00}-\x{FFEF}]`)
+var latinTailRe = regexp.MustCompile(`([\x{2E80}-\x{9FFF}\x{3000}-\x{303F}\x{F900}-\x{FAFF}\x{FF00}-\x{FFEF}])([A-Za-z0-9_$@])`)
+var latinHeadRe = regexp.MustCompile(`([A-Za-z0-9+%,.;:!?%)\]])([\x{2E80}-\x{9FFF}\x{3000}-\x{303F}\x{F900}-\x{FAFF}\x{FF00}-\x{FFEF}])`)
+
+func isCJK(r rune) bool {
+	return cjkRe.MatchString(string(r))
+}
+
+// panguText 对纯文本做补空格。已经隔着空格的不动（正则天然要求相邻）。
+func panguText(s string) string {
+	if !hasCJKAndLatin(s) {
+		return s
+	}
+	prev := ""
+	for prev != s {
+		prev = s
+		s = latinTailRe.ReplaceAllString(s, "$1 $2")
+		s = latinHeadRe.ReplaceAllString(s, "$1 $2")
+	}
+	return s
+}
+
+func hasCJKAndLatin(s string) bool {
+	var cjk, latin bool
+	for _, r := range s {
+		if isCJK(r) {
+			cjk = true
+		} else if unicode.IsLetter(r) || unicode.IsNumber(r) {
+			latin = true
+		}
+		if cjk && latin {
+			return true
+		}
+	}
+	return false
+}
+
+// PanguHTML 给渲染出的正文 HTML 做盘古之白。流式扫描：标签原样输出，
+// 普通文本段补空格，代码上下文里的文本跳过。
+func PanguHTML(html string) string {
+	if !strings.Contains(html, "<") {
+		return html
+	}
+	var b strings.Builder
+	inCode := false
+	for {
+		loc := tagRe.FindStringIndex(html)
+		if loc == nil {
+			rest := html
+			if !inCode {
+				rest = panguText(rest)
+			}
+			b.WriteString(rest)
+			return b.String()
+		}
+		head, tag := html[:loc[0]], html[loc[0]:loc[1]]
+		if !inCode {
+			head = panguText(head)
+		}
+		b.WriteString(head)
+		b.WriteString(tag)
+		if !inCode {
+			if m := codeOpenRe.FindStringSubmatch(tag); m != nil {
+				// 自闭合或行内 code 直接开着也按进/出配对处理（</code> 总会出现）
+				inCode = true
+			}
+		} else if codeCloseRe.MatchString(tag) {
+			inCode = false
+		}
+		html = html[loc[1]:]
+	}
+}

backend/internal/render/pangu_test.go

@@ -0,0 +1,40 @@
+package render
+
+import "testing"
+
+func TestPanguText(t *testing.T) {
+	cases := map[string]string{
+		"把MVP搬进仓库":     "把 MVP 搬进仓库",
+		"今天写了3个小时代码":  "今天写了 3 个小时代码",
+		"使用Go和Vue3开发": "使用 Go 和 Vue3 开发",
+		"纯中文没有混排":     "纯中文没有混排",
+		"已经隔了空格的 Go 语言": "已经隔了空格的 Go 语言",
+		"数字100在前":      "数字 100 在前",
+		"英文后接标点。followed": "英文后接标点。 followed",
+	}
+	for in, want := range cases {
+		if got := panguText(in); got != want {
+			t.Errorf("panguText(%q) = %q, want %q", in, got, want)
+		}
+	}
+}
+
+func TestPanguHTML(t *testing.T) {
+	cases := map[string]string{
+		// 普通文本：处理
+		"<p>把MVP搬进仓库</p>": "<p>把 MVP 搬进仓库</p>",
+		// 行内 code：不动
+		"<p>运行<code>go build ./...</code>即可</p>": "<p>运行<code>go build ./...</code>即可</p>",
+		// pre 代码块：整个内部不动
+		"<pre><code>把MVP搬进仓库\nfmt.Println(1)</code></pre>": "<pre><code>把MVP搬进仓库\nfmt.Println(1)</code></pre>",
+		// 属性里不是文本：不动（src 含字母数字混合不受影响）
+		`<img alt="测试图1" src="a1.png">`: `<img alt="测试图1" src="a1.png">`,
+		// 嵌套：code 结束后恢复处理
+		"<p>先<code>跑起来</code>再看结果100%</p>": "<p>先<code>跑起来</code>再看结果 100%</p>",
+	}
+	for in, want := range cases {
+		if got := PanguHTML(in); got != want {
+			t.Errorf("PanguHTML(%q) = %q, want %q", in, got, want)
+		}
+	}
+}

backend/internal/store/store.go

@@ -96,6 +96,30 @@ func (s *Store) migrate() error {
 			store       TEXT NOT NULL DEFAULT 'local',
 			created_at  TEXT NOT NULL
 		)`, ai),
+		fmt.Sprintf(`CREATE TABLE IF NOT EXISTS users (
+			id          %s,
+			provider    TEXT NOT NULL,
+			handle      TEXT NOT NULL,
+			name        TEXT NOT NULL DEFAULT '',
+			avatar_url  TEXT NOT NULL DEFAULT '',
+			url         TEXT NOT NULL DEFAULT '',
+			banned      INTEGER NOT NULL DEFAULT 0,
+			created_at  TEXT NOT NULL,
+			UNIQUE(provider, handle)
+		)`, ai),
+		fmt.Sprintf(`CREATE TABLE IF NOT EXISTS comments (
+			id          %s,
+			post_id     INTEGER NOT NULL,
+			user_id     INTEGER NOT NULL,
+			parent_id   INTEGER NOT NULL DEFAULT 0,
+			root_id     INTEGER NOT NULL DEFAULT 0,
+			body_md     TEXT NOT NULL DEFAULT '',
+			body_html   TEXT NOT NULL DEFAULT '',
+			status      TEXT NOT NULL DEFAULT 'visible',
+			is_deleted  INTEGER NOT NULL DEFAULT 0,
+			created_at  TEXT NOT NULL,
+			edited_at   TEXT NOT NULL DEFAULT ''
+		)`, ai),
 	}
 	for _, q := range stmts {
 		if _, err := s.db.Exec(s.db.Q(q)); err != nil {
@@ -109,6 +133,10 @@ func (s *Store) migrate() error {
 	columnAdds := []string{
 		`ALTER TABLE posts ADD COLUMN cover_url TEXT NOT NULL DEFAULT ''`,
 		`ALTER TABLE tags  ADD COLUMN color     TEXT NOT NULL DEFAULT ''`,
+		// 短文配图（快发盒上传，Twitter 式网格展示），JSON 数组
+		`ALTER TABLE posts ADD COLUMN images TEXT NOT NULL DEFAULT '[]'`,
+		// 正文首个外链的预览卡片（og 标题/描述/封面），JSON 对象或空串
+		`ALTER TABLE posts ADD COLUMN link_card TEXT NOT NULL DEFAULT ''`,
 	}
 	for _, q := range columnAdds {
 		if _, err := s.db.Exec(s.db.Q(q)); err != nil && !strings.Contains(err.Error(), "already exists") &&
@@ -126,6 +154,9 @@ func (s *Store) migrate() error {
 		{"idx_projects_slug", `CREATE UNIQUE INDEX IF NOT EXISTS idx_projects_slug ON projects(slug)`},
 		{"idx_files_key", `CREATE UNIQUE INDEX IF NOT EXISTS idx_files_key ON files(key)`},
 		{"idx_files_created", `CREATE INDEX IF NOT EXISTS idx_files_created ON files(created_at DESC)`},
+		{"idx_comments_post", `CREATE INDEX IF NOT EXISTS idx_comments_post ON comments(post_id, created_at)`},
+		{"idx_comments_user", `CREATE INDEX IF NOT EXISTS idx_comments_user ON comments(user_id)`},
+		{"idx_comments_status", `CREATE INDEX IF NOT EXISTS idx_comments_status ON comments(status, created_at DESC)`},
 	}
 	for _, ix := range indexes {
 		if _, err := s.db.Exec(s.db.Q(ix.ddl)); err != nil && !strings.Contains(err.Error(), "already exists") {
@@ -138,13 +169,15 @@ func (s *Store) migrate() error {
 
 func (s *Store) seedSettings() error {
 	defs := map[string]string{
-		"site_title":     "ONE · 一个博客",
+		"site_title":       "ONE · 一个博客",
-		"site_desc":      "长文与短文，同一种节奏。",
+		"site_desc":        "长文与短文，同一种节奏。",
-		"author_name":    "ONE",
+		"author_name":      "ONE",
-		"author_bio":     "写点长的，也写点短的。",
+		"author_bio":       "写点长的，也写点短的。",
-		"footer_note":    "© ONE · 一个博客",
+		"footer_note":      "© ONE · 一个博客",
-		"icp":            "",
+		"icp":              "",
-		"posts_per_page": "10",
+		"posts_per_page":   "10",
+		"comments_enabled": "1",
+		"comments_review":  "0",
 	}
 	for k, v := range defs {
 		if s.db.Dialect == db.Postgres {
@@ -207,6 +240,9 @@ func settingsFromMap(m map[string]string) model.Settings {
 	st.CustomCSS = decodeCSSMap(m["custom_css"])
 	st.CustomJS = m["custom_js"]
 	st.SocialLinks = decodeSocialLinks(m["social_links"])
+	// 开关类：'1' / 'true' 都算开，其余（含空）算关
+	st.CommentsEnabled = m["comments_enabled"] == "1" || strings.EqualFold(m["comments_enabled"], "true")
+	st.CommentsReview = m["comments_review"] == "1" || strings.EqualFold(m["comments_review"], "true")
 	if n := atoi(m["posts_per_page"]); n > 0 {
 		st.PostsPerPage = n
 	}
@@ -389,8 +425,11 @@ func (s *Store) UpdateSettings(st model.Settings) error {
 		"custom_css": encodeCSSMap(st.CustomCSS),
 		// 原样存：站主自己的代码，不做任何转义/清洗。
 		"custom_js": st.CustomJS,
-		// 空数组存空串：KV 里不留 "null"。
+		// 社交 / 源码链接：JSON 数组，空数组存 "[]"。
 		"social_links": encodeSocialLinks(st.SocialLinks),
+		// 开关统一存 '1' / '0'。
+		"comments_enabled": b2s(st.CommentsEnabled),
+		"comments_review":  b2s(st.CommentsReview),
 	}
 	for k, v := range sets {
 		if s.db.Dialect == db.Postgres {
@@ -440,21 +479,71 @@ func sanitizeOrder(o string) string {
 }
 
 const postCols = `id, kind, title, slug, summary, cover_url, content_md, content_html, status,
-	published_at, created_at, updated_at, reading_minutes, LENGTH(content_md)`
+	published_at, created_at, updated_at, reading_minutes, LENGTH(content_md), images, link_card`
 
 // listCols 用于列表/时间线：不传 content_md（前端不用），
 // 长文 content_html 只截 600 字符供无摘要时提取纯文本，短文保留全文渲染。
 const listCols = `id, kind, title, slug, summary, cover_url,
 	'' AS content_md,
 	CASE WHEN kind = 'short' THEN content_html ELSE substr(content_html, 1, 600) END AS content_html,
-	status, published_at, created_at, updated_at, reading_minutes, LENGTH(content_md)`
+	status, published_at, created_at, updated_at, reading_minutes, LENGTH(content_md), images, link_card`
+
+// images 列的 JSON 编解码（列存 '[]'，Go 侧 []string；坏数据静默为空）。
+func decodeImages(s string) []string {
+	out := []string{}
+	if strings.TrimSpace(s) == "" {
+		return out
+	}
+	if err := json.Unmarshal([]byte(s), &out); err != nil {
+		return []string{}
+	}
+	return out
+}
+
+func encodeImages(imgs []string) string {
+	if len(imgs) == 0 {
+		return "[]"
+	}
+	b, err := json.Marshal(imgs)
+	if err != nil {
+		return "[]"
+	}
+	return string(b)
+}
+
+// link_card 列的 JSON 编解码：空串/坏数据一律当作「没有卡片」。
+func decodeLinkCard(s string) *model.LinkCard {
+	s = strings.TrimSpace(s)
+	if s == "" {
+		return nil
+	}
+	var c model.LinkCard
+	if err := json.Unmarshal([]byte(s), &c); err != nil || c.Empty() {
+		return nil
+	}
+	return &c
+}
+
+func encodeLinkCard(c *model.LinkCard) string {
+	if c.Empty() {
+		return ""
+	}
+	b, err := json.Marshal(c)
+	if err != nil {
+		return ""
+	}
+	return string(b)
+}
 
 func scanPost(rows interface{ Scan(...any) error }) (model.Post, error) {
 	var p model.Post
+	var imgs, card string
 	err := rows.Scan(&p.ID, &p.Kind, &p.Title, &p.Slug, &p.Summary, &p.CoverURL,
 		&p.ContentMd, &p.ContentHTML, &p.Status, &p.PublishedAt, &p.CreatedAt, &p.UpdatedAt,
-		&p.ReadingMinutes, &p.ContentLen)
+		&p.ReadingMinutes, &p.ContentLen, &imgs, &card)
 	p.Tags = []string{}
+	p.Images = decodeImages(imgs)
+	p.LinkCard = decodeLinkCard(card)
 	return p, err
 }
 
@@ -627,9 +716,10 @@ func (s *Store) GetBySlug(slug string) (model.Post, error) {
 }
 
 func scanPostInto(row *sql.Row, p *model.Post) error {
+	var imgs, card string
 	err := row.Scan(&p.ID, &p.Kind, &p.Title, &p.Slug, &p.Summary, &p.CoverURL,
 		&p.ContentMd, &p.ContentHTML, &p.Status, &p.PublishedAt, &p.CreatedAt, &p.UpdatedAt,
-		&p.ReadingMinutes, &p.ContentLen)
+		&p.ReadingMinutes, &p.ContentLen, &imgs, &card)
 	if err == sql.ErrNoRows {
 		return ErrNotFound
 	}
@@ -637,6 +727,8 @@ func scanPostInto(row *sql.Row, p *model.Post) error {
 		return err
 	}
 	p.Tags = []string{}
+	p.Images = decodeImages(imgs)
+	p.LinkCard = decodeLinkCard(card)
 	return nil
 }
 
@@ -881,17 +973,19 @@ func (s *Store) Create(in model.PostInput) (model.Post, error) {
 
 	var id int64
 	q := s.db.Q(`INSERT INTO posts (kind,title,slug,summary,cover_url,content_md,content_html,status,
-		published_at,created_at,updated_at,reading_minutes)
+		published_at,created_at,updated_at,reading_minutes,images,link_card)
-		VALUES (?,?,?,?,?,?,?,?,?,?,?,?)`)
+		VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?)`)
 	if s.db.Dialect == db.Postgres {
 		err := s.db.QueryRow(q, p.Kind, p.Title, p.Slug, p.Summary, p.CoverURL, p.ContentMd, p.ContentHTML,
-			p.Status, p.PublishedAt, p.CreatedAt, p.UpdatedAt, p.ReadingMinutes).Scan(&id)
+			p.Status, p.PublishedAt, p.CreatedAt, p.UpdatedAt, p.ReadingMinutes, encodeImages(in.Images),
+			encodeLinkCard(in.LinkCard)).Scan(&id)
 		if err != nil {
 			return p, err
 		}
 	} else {
 		res, err := s.db.Exec(q, p.Kind, p.Title, p.Slug, p.Summary, p.CoverURL, p.ContentMd, p.ContentHTML,
-			p.Status, p.PublishedAt, p.CreatedAt, p.UpdatedAt, p.ReadingMinutes)
+			p.Status, p.PublishedAt, p.CreatedAt, p.UpdatedAt, p.ReadingMinutes, encodeImages(in.Images),
+			encodeLinkCard(in.LinkCard))
 		if err != nil {
 			return p, err
 		}
@@ -901,7 +995,12 @@ func (s *Store) Create(in model.PostInput) (model.Post, error) {
 		}
 	}
 	p.ID = id
-	if err := s.setTags(id, in.Tags); err != nil {
+	// 标签是长文的组织方式；短文（类推微博）一律不打标签
+	tags := in.Tags
+	if p.Kind == model.KindShort {
+		tags = nil
+	}
+	if err := s.setTags(id, tags); err != nil {
 		return p, err
 	}
 	return s.Get(id)
@@ -939,6 +1038,14 @@ func (s *Store) Update(id int64, in model.PostInput) (model.Post, error) {
 	// current value (empty string included), so any update round-trips with
 	// whatever the user last saved.
 	p.CoverURL = strings.TrimSpace(in.CoverURL)
+	// Images 同理：nil = 不修改（快发盒只发新帖，后台编辑器全量回传）
+	if in.Images != nil {
+		p.Images = in.Images
+	}
+	// LinkCard 由 admin 层按正文重算后传入；空卡片（含只有 URL）= 清空
+	if in.LinkCard != nil {
+		p.LinkCard = in.LinkCard
+	}
 	p.UpdatedAt = now()
 	if in.ReadingMinutes != nil && *in.ReadingMinutes > 0 {
 		p.ReadingMinutes = *in.ReadingMinutes
@@ -947,13 +1054,18 @@ func (s *Store) Update(id int64, in model.PostInput) (model.Post, error) {
 	}
 
 	if _, err := s.db.Exec(s.db.Q(`UPDATE posts SET kind=?,title=?,slug=?,summary=?,cover_url=?,content_md=?,
-		content_html=?,status=?,published_at=?,updated_at=?,reading_minutes=? WHERE id=?`),
+		content_html=?,status=?,published_at=?,updated_at=?,reading_minutes=?,images=?,link_card=? WHERE id=?`),
 		p.Kind, p.Title, p.Slug, p.Summary, p.CoverURL, p.ContentMd, p.ContentHTML, p.Status,
-		p.PublishedAt, p.UpdatedAt, p.ReadingMinutes, id); err != nil {
+		p.PublishedAt, p.UpdatedAt, p.ReadingMinutes, encodeImages(p.Images), encodeLinkCard(p.LinkCard), id); err != nil {
 		return p, err
 	}
-	if in.Tags != nil {
+	// 短文一律无标签：切换类型或直接保存时都把旧标签清掉
-		if err := s.setTags(id, in.Tags); err != nil {
+	if in.Tags != nil || p.Kind == model.KindShort {
+		tags := in.Tags
+		if p.Kind == model.KindShort {
+			tags = nil
+		}
+		if err := s.setTags(id, tags); err != nil {
 			return p, err
 		}
 	}
@@ -1508,3 +1620,315 @@ func (s *Store) DeleteFile(id int64) (model.File, error) {
 	}
 	return f, nil
 }
+
+// b2s 布尔转 KV 开关值
+func b2s(b bool) string {
+	if b {
+		return "1"
+	}
+	return "0"
+}
+
+// ---------- readers（评论区的登录用户） ----------
+
+// UpsertReader 按 (provider, handle) 找人：找到就更新资料，找不到就建档。
+// banned 是状态位，不随资料更新覆盖。
+func (s *Store) UpsertReader(r model.Reader) (model.Reader, error) {
+	r.CreatedAt = now()
+	q := s.db.Q(`INSERT INTO users (provider,handle,name,avatar_url,url,banned,created_at)
+		VALUES (?,?,?,?,?,0,?)
+		ON CONFLICT (provider,handle) DO UPDATE SET
+		name=excluded.name, avatar_url=excluded.avatar_url, url=excluded.url`)
+	// SQLite 的 ON CONFLICT 语法 Postgres 也认（现代版）；老库退化走下面分支
+	if s.db.Dialect == db.Postgres {
+		if _, err := s.db.Exec(s.db.Q(`INSERT INTO users (provider,handle,name,avatar_url,url,banned,created_at)
+			VALUES (?,?,?,?,?,0,?) ON CONFLICT (provider,handle) DO UPDATE SET
+			name=excluded.name, avatar_url=excluded.avatar_url, url=excluded.url`),
+			r.Provider, r.Handle, r.Name, r.AvatarURL, r.URL, r.CreatedAt); err != nil {
+			return model.Reader{}, err
+		}
+		return s.GetReaderByProviderHandle(r.Provider, r.Handle)
+	}
+	if _, err := s.db.Exec(q, r.Provider, r.Handle, r.Name, r.AvatarURL, r.URL, r.CreatedAt); err != nil {
+		return model.Reader{}, err
+	}
+	return s.GetReaderByProviderHandle(r.Provider, r.Handle)
+}
+
+func (s *Store) GetReader(id int64) (model.Reader, error) {
+	r, err := scanReader(s.db.QueryRow(s.db.Q(`SELECT id,provider,handle,name,avatar_url,url,banned,created_at FROM users WHERE id = ?`), id))
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return model.Reader{}, ErrNotFound
+		}
+		return model.Reader{}, err
+	}
+	return r, nil
+}
+
+func (s *Store) GetReaderByProviderHandle(provider, handle string) (model.Reader, error) {
+	r, err := scanReader(s.db.QueryRow(s.db.Q(`SELECT id,provider,handle,name,avatar_url,url,banned,created_at FROM users WHERE provider = ? AND handle = ?`), provider, handle))
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return model.Reader{}, ErrNotFound
+		}
+		return model.Reader{}, err
+	}
+	return r, nil
+}
+
+func (s *Store) SetReaderBanned(id int64, banned bool) error {
+	res, err := s.db.Exec(s.db.Q(`UPDATE users SET banned = ? WHERE id = ?`), b2i(banned), id)
+	if err != nil {
+		return err
+	}
+	if n, _ := res.RowsAffected(); n == 0 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+// ListReaders 后台的用户列表：带评论数，禁言中的排前面
+func (s *Store) ListReaders() ([]model.Reader, error) {
+	rows, err := s.db.Query(s.db.Q(`SELECT u.id,u.provider,u.handle,u.name,u.avatar_url,u.url,u.banned,u.created_at,
+		(SELECT COUNT(*) FROM comments c WHERE c.user_id = u.id AND c.is_deleted = 0) AS cnt
+		FROM users u ORDER BY u.banned DESC, u.created_at DESC`))
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	out := []model.Reader{}
+	for rows.Next() {
+		var r model.Reader
+		var cnt int64
+		if err := rows.Scan(&r.ID, &r.Provider, &r.Handle, &r.Name, &r.AvatarURL, &r.URL, &r.Banned, &r.CreatedAt, &cnt); err != nil {
+			return nil, err
+		}
+		r.CommentCount = cnt
+		out = append(out, r)
+	}
+	return out, rows.Err()
+}
+
+func b2i(b bool) int64 {
+	if b {
+		return 1
+	}
+	return 0
+}
+
+func scanReader(sc interface{ Scan(...any) error }) (model.Reader, error) {
+	var r model.Reader
+	var banned int64
+	err := sc.Scan(&r.ID, &r.Provider, &r.Handle, &r.Name, &r.AvatarURL, &r.URL, &banned, &r.CreatedAt)
+	r.Banned = banned == 1
+	return r, err
+}
+
+// ---------- comments ----------
+
+const commentCols = `c.id, c.post_id, c.parent_id, c.root_id, c.user_id, c.body_md, c.body_html,
+	c.status, c.is_deleted, c.created_at, c.edited_at,
+	u.id, u.provider, u.handle, u.name, u.avatar_url, u.url, u.banned, u.created_at`
+
+func scanComment(sc interface{ Scan(...any) error }) (model.Comment, error) {
+	var c model.Comment
+	var u model.Reader
+	var banned int64
+	err := sc.Scan(&c.ID, &c.PostID, &c.ParentID, &c.RootID, &c.UserID, &c.BodyMd, &c.BodyHTML,
+		&c.Status, &c.IsDeleted, &c.CreatedAt, &c.EditedAt,
+		&u.ID, &u.Provider, &u.Handle, &u.Name, &u.AvatarURL, &u.URL, &banned, &u.CreatedAt)
+	if err != nil {
+		return c, err
+	}
+	c.User = &model.Reader{ID: u.ID, Provider: u.Provider, Handle: u.Handle, Name: u.Name,
+		AvatarURL: u.AvatarURL, URL: u.URL, Banned: banned == 1, CreatedAt: u.CreatedAt}
+	c.Replies = []model.Comment{}
+	return c, nil
+}
+
+// CreateComment 新建评论；parent/root 归属与审核状态由调用方决定
+func (s *Store) CreateComment(c model.Comment) (model.Comment, error) {
+	c.CreatedAt = now()
+	q := s.db.Q(`INSERT INTO comments (post_id,user_id,parent_id,root_id,body_md,body_html,status,created_at)
+		VALUES (?,?,?,?,?,?,?,?)`)
+	var id int64
+	if s.db.Dialect == db.Postgres {
+		err := s.db.QueryRow(q+` RETURNING id`, c.PostID, c.UserID, c.ParentID, c.RootID,
+			c.BodyMd, c.BodyHTML, c.Status, c.CreatedAt).Scan(&id)
+		if err != nil {
+			return model.Comment{}, err
+		}
+	} else {
+		res, err := s.db.Exec(q, c.PostID, c.UserID, c.ParentID, c.RootID, c.BodyMd, c.BodyHTML, c.Status, c.CreatedAt)
+		if err != nil {
+			return model.Comment{}, err
+		}
+		if id, err = res.LastInsertId(); err != nil {
+			return model.Comment{}, err
+		}
+	}
+	return s.GetComment(id)
+}
+
+// GetComment 单条（含用户）
+func (s *Store) GetComment(id int64) (model.Comment, error) {
+	c, err := scanComment(s.db.QueryRow(s.db.Q(`SELECT `+commentCols+` FROM comments c
+		JOIN users u ON u.id = c.user_id WHERE c.id = ?`), id))
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return model.Comment{}, ErrNotFound
+		}
+		return model.Comment{}, err
+	}
+	return c, nil
+}
+
+// ListCommentsByPost 一篇文章的公开评论树：顶层可见 + 访客自己的待审；
+// 每条顶层内嵌全部可见回复。deleted 的行保留（墓碑：正文清空，楼层不塌）。
+func (s *Store) ListCommentsByPost(postID, viewerID int64, newestFirst bool) ([]model.Comment, error) {
+	order := `ASC`
+	if newestFirst {
+		order = `DESC`
+	}
+	rows, err := s.db.Query(s.db.Q(`SELECT `+commentCols+` FROM comments c
+		JOIN users u ON u.id = c.user_id
+		WHERE c.post_id = ? AND c.parent_id = 0
+		AND (c.status = 'visible' OR (c.status = 'pending' AND c.user_id = ?))
+		ORDER BY c.created_at `+order), postID, viewerID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	roots := []model.Comment{}
+	idx := map[int64]int{}
+	for rows.Next() {
+		c, err := scanComment(rows)
+		if err != nil {
+			return nil, err
+		}
+		c.Replies = []model.Comment{}
+		idx[c.ID] = len(roots)
+		roots = append(roots, c)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	// 回复：可见的（+访客自己的待审），按时间正序挂在各自根下
+	rows2, err := s.db.Query(s.db.Q(`SELECT `+commentCols+` FROM comments c
+		JOIN users u ON u.id = c.user_id
+		WHERE c.post_id = ? AND c.parent_id <> 0
+		AND (c.status = 'visible' OR (c.status = 'pending' AND c.user_id = ?))
+		ORDER BY c.created_at ASC`), postID, viewerID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows2.Close()
+	for rows2.Next() {
+		c, err := scanComment(rows2)
+		if err != nil {
+			return nil, err
+		}
+		if at, ok := idx[c.RootID]; ok {
+			roots[at].Replies = append(roots[at].Replies, c)
+		}
+	}
+	for i := range roots {
+		roots[i].ReplyCount = len(roots[i].Replies)
+	}
+	return roots, rows2.Err()
+}
+
+// ListCommentsAdmin 后台的评论列表（平铺，含用户与文章标题），status 过滤
+func (s *Store) ListCommentsAdmin(status string, page, size int) (model.CommentPage, error) {
+	if page < 1 {
+		page = 1
+	}
+	if size < 1 || size > 100 {
+		size = 20
+	}
+	where := ""
+	var args []any
+	switch status {
+	case "pending", "visible":
+		where = ` WHERE c.status = '` + status + `' AND c.is_deleted = 0`
+	default:
+		where = ` WHERE c.is_deleted = 0`
+	}
+	var total int
+	if err := s.db.QueryRow(s.db.Q(`SELECT COUNT(*) FROM comments c`+where), args...).Scan(&total); err != nil {
+		return model.CommentPage{}, err
+	}
+	args = append(args, size, (page-1)*size)
+	rows, err := s.db.Query(s.db.Q(`SELECT `+commentCols+`, COALESCE(p.title, '') FROM comments c
+		JOIN users u ON u.id = c.user_id
+		JOIN posts p ON p.id = c.post_id`+where+`
+		ORDER BY c.created_at DESC LIMIT ? OFFSET ?`), args...)
+	if err != nil {
+		return model.CommentPage{}, err
+	}
+	defer rows.Close()
+	out := []model.Comment{}
+	for rows.Next() {
+		c, title, err := scanCommentAdmin(rows)
+		if err != nil {
+			return model.CommentPage{}, err
+		}
+		c.PostTitle = title
+		out = append(out, c)
+	}
+	return model.CommentPage{Items: out, Total: total, Page: page, Size: size}, rows.Err()
+}
+
+// CommentPage 后台评论管理的分页容器
+type modelCommentPageAlias = struct{}
+
+func scanCommentAdmin(sc interface{ Scan(...any) error }) (model.Comment, string, error) {
+	var c model.Comment
+	var u model.Reader
+	var title string
+	var banned int64
+	err := sc.Scan(&c.ID, &c.PostID, &c.ParentID, &c.RootID, &c.UserID, &c.BodyMd, &c.BodyHTML,
+		&c.Status, &c.IsDeleted, &c.CreatedAt, &c.EditedAt,
+		&u.ID, &u.Provider, &u.Handle, &u.Name, &u.AvatarURL, &u.URL, &banned, &u.CreatedAt, &title)
+	c.User = &model.Reader{ID: u.ID, Provider: u.Provider, Handle: u.Handle, Name: u.Name,
+		AvatarURL: u.AvatarURL, URL: u.URL, Banned: banned == 1, CreatedAt: u.CreatedAt}
+	return c, title, err
+}
+
+// SetCommentStatus 审核通过 / 退回待审
+func (s *Store) SetCommentStatus(id int64, status string) error {
+	res, err := s.db.Exec(s.db.Q(`UPDATE comments SET status = ? WHERE id = ?`), status, id)
+	if err != nil {
+		return err
+	}
+	if n, _ := res.RowsAffected(); n == 0 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+// DeleteComment 软删：留壳（「该评论已删除」），正文清空
+func (s *Store) DeleteComment(id int64) error {
+	res, err := s.db.Exec(s.db.Q(`UPDATE comments SET is_deleted = 1, body_md = '', body_html = '' WHERE id = ?`), id)
+	if err != nil {
+		return err
+	}
+	if n, _ := res.RowsAffected(); n == 0 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+// UpdateCommentBody 编辑后的正文回写
+func (s *Store) UpdateCommentBody(id int64, md, html string) error {
+	res, err := s.db.Exec(s.db.Q(`UPDATE comments SET body_md = ?, body_html = ?, edited_at = ? WHERE id = ?`),
+		md, html, now(), id)
+	if err != nil {
+		return err
+	}
+	if n, _ := res.RowsAffected(); n == 0 {
+		return ErrNotFound
+	}
+	return nil
+}

backend/internal/thumbs/thumbs.go

@@ -0,0 +1,377 @@
+// Package thumbs 懒生成上传图片的缩略图并落盘缓存（memos 模式）：
+// 首次请求时从存储端读一次原图，缩放编码后进缓存，此后不再碰原文件；
+// 生成失败写 .failed 标记，1 小时内不反复重试。
+package thumbs
+
+import (
+	"bytes"
+	"fmt"
+	"image"
+	"image/gif"
+	"image/jpeg"
+	"image/png"
+	"io"
+	"io/fs"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"sync"
+	"time"
+)
+
+const (
+	// MaxSrcBytes 超过此大小的原图不生成（防止大图拖垮请求），调用方回原图。
+	MaxSrcBytes = 25 << 20 // 25MB
+	// maxDim 单边像素上限，超过视为畸形图（解压炸弹防线）。
+	maxDim = 10000
+	// JPEGQuality 转码输出质量。
+	JPEGQuality = 82
+	// failedTTL 失败后的重试冷却。
+	failedTTL = time.Hour
+)
+
+// Supported 报告该 mime 是否走缩略图管线（标准库能完整解码的静图）。
+func Supported(mime string) bool {
+	switch mime {
+	case "image/jpeg", "image/png", "image/gif":
+		return true
+	}
+	return false
+}
+
+// Generate 把原图字节缩放到宽 w（只缩不放）。已够小的原生格式图原样直通
+// （返回 passThrough=true，调用方直接落盘 src），其余统一转 JPEG——
+// 缩略图不需要 alpha，透明区铺白底。
+func Generate(src []byte, mime string, w int) (out []byte, outMime string, passThrough bool, err error) {
+	cfg, _, err := image.DecodeConfig(bytes.NewReader(src))
+	if err != nil {
+		return nil, "", false, fmt.Errorf("decode config: %w", err)
+	}
+	if cfg.Width <= 0 || cfg.Height <= 0 || cfg.Width > maxDim || cfg.Height > maxDim {
+		return nil, "", false, fmt.Errorf("bad dimensions %dx%d", cfg.Width, cfg.Height)
+	}
+	if cfg.Width <= w && Supported(mime) {
+		return src, mime, true, nil
+	}
+
+	var img image.Image
+	switch mime {
+	case "image/jpeg":
+		img, err = jpeg.Decode(bytes.NewReader(src))
+	case "image/png":
+		img, err = png.Decode(bytes.NewReader(src))
+	case "image/gif":
+		img, err = gif.Decode(bytes.NewReader(src)) // 首帧，缩略图不做动画
+	default:
+		return nil, "", false, fmt.Errorf("unsupported mime %q", mime)
+	}
+	if err != nil {
+		return nil, "", false, fmt.Errorf("decode: %w", err)
+	}
+
+	var buf bytes.Buffer
+	if err := jpeg.Encode(&buf, Resize(img, w), &jpeg.Options{Quality: JPEGQuality}); err != nil {
+		return nil, "", false, err
+	}
+	return buf.Bytes(), "image/jpeg", false, nil
+}
+
+// Resize 盒均值（box-average）缩放到宽 nw（等比，只缩不放）。
+// 非预乘 RGBA 按 alpha 加权平均，透明像素不计入颜色、铺白底。纯标准库。
+func Resize(src image.Image, nw int) *image.RGBA {
+	b := src.Bounds()
+	ow, oh := b.Dx(), b.Dy()
+	if nw <= 0 || nw >= ow {
+		nw = ow
+	}
+	nh := (oh*nw + ow/2) / ow
+	dst := image.NewRGBA(image.Rect(0, 0, nw, nh))
+	flat := flatten(src, b)
+
+	for y := 0; y < nh; y++ {
+		y0 := y * oh / nh
+		y1 := (y+1)*oh/nh + 1
+		if y1 > oh {
+			y1 = oh
+		}
+		if y1 <= y0 {
+			y1 = y0 + 1
+		}
+		for x := 0; x < nw; x++ {
+			x0 := x * ow / nw
+			x1 := (x+1)*ow/nw + 1
+			if x1 > ow {
+				x1 = ow
+			}
+			if x1 <= x0 {
+				x1 = x0 + 1
+			}
+			var r, g, bl, a, n uint64
+			for sy := y0; sy < y1; sy++ {
+				row := sy * ow * 4
+				for sx := x0; sx < x1; sx++ {
+					i := row + sx*4
+					al := uint64(flat[i+3])
+					r += uint64(flat[i]) * al
+					g += uint64(flat[i+1]) * al
+					bl += uint64(flat[i+2]) * al
+					a += al
+					n++
+				}
+			}
+			d := y*nw*4 + x*4
+			if a == 0 || n == 0 {
+				dst.Pix[d], dst.Pix[d+1], dst.Pix[d+2], dst.Pix[d+3] = 255, 255, 255, 255
+				continue
+			}
+			dst.Pix[d] = uint8(r / a)
+			dst.Pix[d+1] = uint8(g / a)
+			dst.Pix[d+2] = uint8(bl / a)
+			dst.Pix[d+3] = uint8(a / n)
+		}
+	}
+	return dst
+}
+
+// flatten 把任意 image.Image 转成 w*h 扁平非预乘 RGBA 字节。
+func flatten(src image.Image, b image.Rectangle) []byte {
+	w, h := b.Dx(), b.Dy()
+	out := make([]byte, w*h*4)
+	i := 0
+	for y := b.Min.Y; y < b.Max.Y; y++ {
+		for x := b.Min.X; x < b.Max.X; x++ {
+			r, g, bl, a := src.At(x, y).RGBA() // 0..0xffff，预乘
+			pa := a >> 8
+			if pa == 0 {
+				out[i], out[i+1], out[i+2], out[i+3] = 0, 0, 0, 0
+			} else {
+				out[i] = uint8(min255((r >> 8) * 0xff / pa))
+				out[i+1] = uint8(min255((g >> 8) * 0xff / pa))
+				out[i+2] = uint8(min255((bl >> 8) * 0xff / pa))
+				out[i+3] = uint8(pa)
+			}
+			i += 4
+		}
+	}
+	return out
+}
+
+func min255(v uint32) uint32 {
+	if v > 0xff {
+		return 0xff
+	}
+	return v
+}
+
+// Store 是缩略图磁盘缓存：
+//
+//	{Dir}/{sha[:2]}/{sha[:32]}-{w}.jpg   成功产物（直通可能是 .png/.gif）
+//	{Dir}/{sha[:2]}/{sha[:32]}.failed    失败标记
+//
+// 文件名以原图内容哈希（files.sha256）为键：内容变则键变，缓存天然失效。
+// 缓存只增不减会慢慢吃磁盘，所以 Put 之后按 MaxBytes 做容量闸淘汰（LRU：
+// 命中时 Touch 更新 mtime，淘汰时先下手最久没人要的）。
+type Store struct {
+	Dir      string
+	MaxBytes int64
+
+	mu        sync.Mutex
+	locks     map[string]*sync.Mutex
+	lastSweep time.Time
+	sweeping  bool
+}
+
+// DefaultMaxBytes 是缓存总量上限：约 1700 张 150KB 的缩略图，
+// 远超单用户博客的实际存量，纯粹是防多年以后无限涨。
+const DefaultMaxBytes = 256 << 20
+
+// sweepInterval 限制扫描频率——淘汰是后台维护，不该拖慢写缓存的请求。
+const sweepInterval = 10 * time.Minute
+
+func NewStore(dir string) *Store {
+	return &Store{Dir: dir, MaxBytes: DefaultMaxBytes, locks: make(map[string]*sync.Mutex)}
+}
+
+func (s *Store) dir(sha string) string { return filepath.Join(s.Dir, sha[:2]) }
+
+func (s *Store) jpegPath(sha string, w int) string {
+	return filepath.Join(s.dir(sha), fmt.Sprintf("%s-%d.jpg", sha[:32], w))
+}
+
+func (s *Store) failedPath(sha string) string {
+	return filepath.Join(s.dir(sha), sha[:32]+".failed")
+}
+
+// FindCached 返回已存在的缓存文件（jpg 优先，其次直通的 png/gif），没有则空串。
+func (s *Store) FindCached(sha string, w int) string {
+	base := strings.TrimSuffix(s.jpegPath(sha, w), ".jpg")
+	for _, ext := range []string{".jpg", ".png", ".gif"} {
+		if fi, err := os.Stat(base + ext); err == nil && !fi.IsDir() {
+			return base + ext
+		}
+	}
+	return ""
+}
+
+// Put 原子写入缓存文件（内容直通时保留原生格式），成功则清掉失败标记。
+func (s *Store) Put(sha string, w int, data []byte, mime string) (string, error) {
+	p := s.jpegPath(sha, w)
+	if mime != "image/jpeg" {
+		p = strings.TrimSuffix(p, ".jpg") + extFor(mime)
+	}
+	if err := os.MkdirAll(filepath.Dir(p), 0o755); err != nil {
+		return "", err
+	}
+	tmp := p + ".tmp"
+	if err := os.WriteFile(tmp, data, 0o644); err != nil {
+		return "", err
+	}
+	if err := os.Rename(tmp, p); err != nil {
+		os.Remove(tmp)
+		return "", err
+	}
+	_ = os.Remove(s.failedPath(sha))
+	s.maybeSweep()
+	return p, nil
+}
+
+// Touch 把缓存文件的 mtime 拨到现在：命中一次就等于「最近还要用」，
+// 供容量闸按 LRU 淘汰。失败无所谓（只影响淘汰顺序）。
+func (s *Store) Touch(path string) {
+	now := time.Now()
+	_ = os.Chtimes(path, now, now)
+}
+
+// Purge 清掉某个原图（按内容哈希）的全部缩略图与失败标记。
+// 删除上传文件时调用，否则缓存会一直留着已删图片的产物。
+func (s *Store) Purge(sha string) {
+	if len(sha) < 32 {
+		return
+	}
+	entries, err := os.ReadDir(s.dir(sha))
+	if err != nil {
+		return
+	}
+	for _, e := range entries {
+		if strings.HasPrefix(e.Name(), sha[:32]) { // {sha}-{w}.jpg / {sha}.failed
+			_ = os.Remove(filepath.Join(s.dir(sha), e.Name()))
+		}
+	}
+	_ = os.Remove(s.dir(sha)) // 目录空了就收掉
+}
+
+// FailedRecently 报告是否在冷却期（近期生成失败过）。
+func (s *Store) FailedRecently(sha string) bool {
+	fi, err := os.Stat(s.failedPath(sha))
+	return err == nil && time.Since(fi.ModTime()) < failedTTL
+}
+
+// MarkFailed 落失败标记。
+func (s *Store) MarkFailed(sha string) {
+	if err := os.MkdirAll(s.dir(sha), 0o755); err == nil {
+		_ = os.WriteFile(s.failedPath(sha), []byte("thumbs: generation failed\n"), 0o644)
+	}
+}
+
+// Lock 取该（哈希, 宽度）的互斥锁：并发首请求只生成一次，其余等待后读缓存。
+func (s *Store) Lock(sha string, w int) *sync.Mutex {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if len(s.locks) > lockCacheMax {
+		clear(s.locks) // 粗粒度回收：正在持有的锁不受影响（调用方拿着指针），
+	} // 清掉的只是历史条目，最坏情况是同一图并发重生成一次
+	k := fmt.Sprintf("%s-%d", sha[:32], w)
+	l, ok := s.locks[k]
+	if !ok {
+		l = &sync.Mutex{}
+		s.locks[k] = l
+	}
+	return l
+}
+
+// lockCacheMax 限制锁表大小（每张图最多 3 种宽度），博客体量下足够。
+const lockCacheMax = 4096
+
+// maybeSweep 在写入新缓存后检查总量；超上限就按 mtime 从旧到新删，
+// 删到 3/4 水位（留滞回，避免每次写入都刚好卡在边界反复删）。
+// 每 sweepInterval 最多跑一次，且同一时刻只有一个在跑。
+func (s *Store) maybeSweep() {
+	if s.MaxBytes <= 0 {
+		return
+	}
+	s.mu.Lock()
+	if s.sweeping || time.Since(s.lastSweep) < sweepInterval {
+		s.mu.Unlock()
+		return
+	}
+	s.sweeping, s.lastSweep = true, time.Now()
+	s.mu.Unlock()
+
+	defer func() {
+		s.mu.Lock()
+		s.sweeping = false
+		s.mu.Unlock()
+	}()
+
+	var files []fileInfo
+	var total int64
+	_ = filepath.WalkDir(s.Dir, func(path string, d fs.DirEntry, err error) error {
+		if err != nil || d.IsDir() {
+			return nil
+		}
+		// 半途而废的临时文件（进程被杀）直接清
+		if strings.HasSuffix(path, ".tmp") {
+			_ = os.Remove(path)
+			return nil
+		}
+		fi, err := d.Info()
+		if err != nil {
+			return nil
+		}
+		total += fi.Size()
+		files = append(files, fileInfo{path: path, size: fi.Size(), mtime: fi.ModTime()})
+		return nil
+	})
+	if total <= s.MaxBytes {
+		return
+	}
+	sort.Slice(files, func(i, j int) bool { return files[i].mtime.Before(files[j].mtime) })
+	lowWater := s.MaxBytes * 3 / 4
+	for _, f := range files {
+		if total <= lowWater {
+			break
+		}
+		if err := os.Remove(f.path); err == nil {
+			total -= f.size
+		}
+	}
+}
+
+type fileInfo struct {
+	path  string
+	size  int64
+	mtime time.Time
+}
+
+func extFor(mime string) string {
+	switch mime {
+	case "image/png":
+		return ".png"
+	case "image/gif":
+		return ".gif"
+	}
+	return ".jpg"
+}
+
+// ReadAllLimited 读至多 max 字节，超限报错（防止把 25MB+ 原图吞进内存）。
+func ReadAllLimited(r io.Reader, max int64) ([]byte, error) {
+	data, err := io.ReadAll(io.LimitReader(r, max+1))
+	if err != nil {
+		return nil, err
+	}
+	if int64(len(data)) > max {
+		return nil, fmt.Errorf("source exceeds %d bytes", max)
+	}
+	return data, nil
+}

backend/internal/thumbs/thumbs_test.go

@@ -0,0 +1,172 @@
+package thumbs
+
+import (
+	"bytes"
+	"image"
+	"image/color"
+	"image/jpeg"
+	"image/png"
+	"io/fs"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+)
+
+func makePNG(t *testing.T, w, h int, transparent bool) []byte {
+	t.Helper()
+	img := image.NewRGBA(image.Rect(0, 0, w, h))
+	for y := 0; y < h; y++ {
+		for x := 0; x < w; x++ {
+			// 左红右绿两半，方便验证盒均值没把通道混错
+			c := color.RGBA{255, 0, 0, 255}
+			if x >= w/2 {
+				c = color.RGBA{0, 255, 0, 255}
+			}
+			if transparent {
+				c = color.RGBA{0, 0, 0, 0}
+			}
+			img.Set(x, y, c)
+		}
+	}
+	var b bytes.Buffer
+	if err := png.Encode(&b, img); err != nil {
+		t.Fatal(err)
+	}
+	return b.Bytes()
+}
+
+func TestGenerateDownscale(t *testing.T) {
+	src := makePNG(t, 800, 400, false)
+	out, mime, pass, err := Generate(src, "image/png", 400)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if pass {
+		t.Fatal("800px 图在 w=400 不应直通")
+	}
+	if mime != "image/jpeg" {
+		t.Fatalf("mime=%s", mime)
+	}
+	cfg, _, err := image.DecodeConfig(bytes.NewReader(out))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if cfg.Width != 400 || cfg.Height != 200 {
+		t.Fatalf("got %dx%d, want 400x200", cfg.Width, cfg.Height)
+	}
+	img, err := jpeg.Decode(bytes.NewReader(out))
+	if err != nil {
+		t.Fatal(err)
+	}
+	// 盒均值后左右两半的中心仍是红/绿（容差给 JPEG 质量 82 留余量）
+	r, g, _, _ := img.At(100, 100).RGBA()
+	if r>>8 < 200 || g>>8 > 60 {
+		t.Fatalf("左半应偏红: r=%d g=%d", r>>8, g>>8)
+	}
+	r, g, _, _ = img.At(300, 100).RGBA()
+	if g>>8 < 200 || r>>8 > 60 {
+		t.Fatalf("右半应偏绿: r=%d g=%d", r>>8, g>>8)
+	}
+}
+
+func TestGeneratePassThrough(t *testing.T) {
+	src := makePNG(t, 300, 150, false)
+	out, mime, pass, err := Generate(src, "image/png", 960)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !pass || mime != "image/png" || !bytes.Equal(out, src) {
+		t.Fatalf("小图应原样直通 pass=%v mime=%s", pass, mime)
+	}
+}
+
+func TestGenerateRejectsGarbage(t *testing.T) {
+	if _, _, _, err := Generate([]byte("not an image"), "image/jpeg", 400); err == nil {
+		t.Fatal("垃圾字节应报错")
+	}
+}
+
+func TestFlattenAlphaUnpremultiply(t *testing.T) {
+	// 50% 透明的纯红：alpha=128 预乘 R=128，还原应为 R≈255
+	img := image.NewNRGBA(image.Rect(0, 0, 1, 1))
+	img.Set(0, 0, color.NRGBA{255, 0, 0, 128})
+	flat := flatten(img, img.Bounds())
+	if flat[0] < 240 || flat[3] != 128 {
+		t.Fatalf("unpremultiply wrong: r=%d a=%d", flat[0], flat[3])
+	}
+}
+
+func TestSweepEvictsOldest(t *testing.T) {
+	s := NewStore(t.TempDir())
+	s.MaxBytes = 2500 // 每个文件 1000B，留得下 2 个
+	sha := func(i int) string { return strings.Repeat(string(rune('a'+i)), 64) }
+
+	// 三个宽度：写入顺序即 mtime 顺序（下面再显式拨时间）
+	for i := 0; i < 3; i++ {
+		if _, err := s.Put(sha(i), 480, bytes.Repeat([]byte("x"), 1000), "image/jpeg"); err != nil {
+			t.Fatal(err)
+		}
+	}
+	// 跳过节流，让这次 Put 真的触发扫描
+	s.lastSweep = time.Time{}
+	oldest := time.Now().Add(-3 * time.Hour)
+	for i := 0; i < 2; i++ { // 前两个假装很久没人访问
+		os.Chtimes(s.jpegPath(sha(i), 480), oldest, oldest)
+	}
+	if _, err := s.Put(sha(3), 480, bytes.Repeat([]byte("x"), 1000), "image/jpeg"); err != nil {
+		t.Fatal(err)
+	}
+
+	var total int64
+	var kept []string
+	filepath.WalkDir(s.Dir, func(p string, d fs.DirEntry, err error) error {
+		if err != nil || d.IsDir() {
+			return nil
+		}
+		fi, _ := d.Info()
+		total += fi.Size()
+		kept = append(kept, d.Name())
+		return nil
+	})
+	if total > s.MaxBytes {
+		t.Fatalf("sweep 后仍超限: total=%d max=%d files=%v", total, s.MaxBytes, kept)
+	}
+	if len(kept) >= 4 {
+		t.Fatalf("一个都没淘汰，说明扫描没跑: files=%v", kept)
+	}
+	// 最新写入的那个必须还在
+	if s.FindCached(sha(3), 480) == "" {
+		t.Fatalf("刚写入的缓存被误删: %v", kept)
+	}
+}
+
+func TestPurgeRemovesAllEntriesForFile(t *testing.T) {
+	s := NewStore(t.TempDir())
+	sha := strings.Repeat("f", 64)
+	for _, w := range []int{480, 960} {
+		if _, err := s.Put(sha, w, []byte("data"), "image/jpeg"); err != nil {
+			t.Fatal(err)
+		}
+	}
+	s.MarkFailed(sha)
+	other := strings.Repeat("a", 64)
+	if _, err := s.Put(other, 480, []byte("keep"), "image/jpeg"); err != nil {
+		t.Fatal(err)
+	}
+
+	s.Purge(sha)
+
+	for _, w := range []int{480, 960} {
+		if p := s.FindCached(sha, w); p != "" {
+			t.Fatalf("purge 后仍残留 %s", p)
+		}
+	}
+	if s.FailedRecently(sha) {
+		t.Fatal("失败标记没清掉")
+	}
+	if s.FindCached(other, 480) == "" {
+		t.Fatal("误删了别的文件的缓存")
+	}
+}

backend/main.go

@@ -18,10 +18,13 @@ import (
 
 	"oneblog/internal/admin"
 	"oneblog/internal/api"
+	"oneblog/internal/auth"
 	"oneblog/internal/config"
 	"oneblog/internal/db"
+	"oneblog/internal/hub"
 	"oneblog/internal/storage"
 	"oneblog/internal/store"
+	"oneblog/internal/thumbs"
 )
 
 func main() {
@@ -60,13 +63,37 @@ func main() {
 		blobs = storage.NewLocal(filepath.Join(cfg.DataDir, "uploads"))
 	}
 
-	public := &api.API{Store: st, Cfg: cfg, Blobs: blobs}
+	// 评论区的读者会话（cookie one_reader），30 天有效
-	adminAPI := admin.NewAPI(st, cfg, admin.NewSessions(cfg.SessionSec, 7*24*time.Hour))
+	readerSessions := auth.NewReaderSessions(cfg.SessionSec, 30*24*time.Hour)
+	// 后台管理员会话（cookie one_session），前台评论也用它识别站主身份
+	adminSessions := admin.NewSessions(cfg.SessionSec, 7*24*time.Hour)
+	// 评论变更广播（SSE）：公开端订阅、双端发布，共用同一实例
+	commentHub := hub.New()
+	// 缩略图懒生成 + 磁盘缓存（首次请求生成一次，之后直接供缓存）
+	thumbCache := thumbs.NewStore(filepath.Join(cfg.DataDir, ".thumbnail_cache"))
+
+	public := &api.API{
+		Store:          st,
+		Cfg:            cfg,
+		Blobs:          blobs,
+		Thumbs:         thumbCache,
+		ReaderSessions: readerSessions,
+		GH:             auth.GitHub{ClientID: cfg.GitHubClientID, ClientSecret: cfg.GitHubClientSecret},
+		GG:             auth.Google{ClientID: cfg.GoogleClientID, ClientSecret: cfg.GoogleClientSecret},
+		TG:             auth.Telegram{Bot: cfg.TelegramBot, Token: cfg.TelegramToken},
+		AdminSessions:  adminSessions,
+		Hub:            commentHub,
+	}
+	adminAPI := admin.NewAPI(st, cfg, adminSessions)
+	adminAPI.Hub = commentHub
 	adminAPI.Blobs = blobs
+	adminAPI.Thumbs = thumbCache // 删文件时连带清掉它的缩略图
 
 	root := http.NewServeMux()
 	root.Handle("/api/admin/", adminAPI.Routes())
 	public.Mount(root)
+	// 更长的前缀优先匹配：/uploads/thumb/ 走缩略图，其余 /uploads/ 走原图流式
+	root.Handle("/uploads/thumb/", public.ThumbHandler())
 	root.Handle("/uploads/", public.UploadsHandler())
 	root.Handle("/", spaHandler(cfg.WebDist))
 
@@ -165,6 +192,14 @@ type statusRecorder struct {
 
 func (s *statusRecorder) WriteHeader(code int) { s.status = code; s.ResponseWriter.WriteHeader(code) }
 
+// Flush 透传给底层 writer——SSE 这类流式响应靠它判定可刷新，
+// 包装器不实现 Flusher 的话流式端点会直接不可用。
+func (s *statusRecorder) Flush() {
+	if f, ok := s.ResponseWriter.(http.Flusher); ok {
+		f.Flush()
+	}
+}
+
 func placeholderPage() string {
 	return `<!doctype html><meta charset="utf-8"><title>ONE</title>
 <style>body{font-family:-apple-system,"PingFang SC",sans-serif;background:#faf7f1;color:#33302b;

frontend/package.json

@@ -10,6 +10,11 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@codemirror/commands": "^6.11.1",
+    "@codemirror/lang-markdown": "^6.5.2",
+    "@codemirror/language": "^6.12.4",
+    "@codemirror/state": "^6.7.6",
+    "@codemirror/view": "^6.43.13",
     "@milkdown/crepe": "^7.22.1",
     "dompurify": "^3.1.6",
     "vue": "^3.4.0",

frontend/pnpm-lock.yaml

@@ -8,6 +8,21 @@ importers:
 
   .:
     dependencies:
+      '@codemirror/commands':
+        specifier: ^6.11.1
+        version: 6.11.1
+      '@codemirror/lang-markdown':
+        specifier: ^6.5.2
+        version: 6.5.2
+      '@codemirror/language':
+        specifier: ^6.12.4
+        version: 6.12.4
+      '@codemirror/state':
+        specifier: ^6.7.6
+        version: 6.7.6
+      '@codemirror/view':
+        specifier: ^6.43.13
+        version: 6.43.13
       '@milkdown/crepe':
         specifier: ^7.22.1
         version: 7.22.1(prosemirror-model@1.25.11)(prosemirror-state@1.4.4)(prosemirror-view@1.42.4)(typescript@5.9.3)
@@ -140,14 +155,14 @@ packages:
   '@codemirror/search@6.7.2':
     resolution: {integrity: sha512-gUYkYhT2+n/+VGZ+8EzE5WFkYZUZYm1VOKDudIsNqh42uRVQJ0a6Yss9sdKT3MeOYfuL1N6AZA57oza0Oyr0LA==}
 
-  '@codemirror/state@6.7.5':
+  '@codemirror/state@6.7.6':
-    resolution: {integrity: sha512-QjLbZmY1Au3JiRrDVYFLRD0BZ3SOKS9pR3yjIkd7u27YY8TFD9/Q9fhPnLV5l1mHFSo3hHU/N31vpwEJOx4owQ==}
+    resolution: {integrity: sha512-kAz+AncRtKuIknedxT1bq4XwXv4UowhbkHU1myPrtVb/jZtImWuV5BXzv5vK6i3kYACsdiZiQKFQQ5Mq7elW8w==}
 
   '@codemirror/theme-one-dark@6.1.3':
     resolution: {integrity: sha512-NzBdIvEJmx6fjeremiGp3t/okrLPYT0d9orIc7AFun8oZcRk58aejkqhv6spnz4MLAevrKNPMQYXEWMg4s+sKA==}
 
-  '@codemirror/view@6.43.12':
+  '@codemirror/view@6.43.13':
-    resolution: {integrity: sha512-Nv0vxQ19NAqvB/c2pFzjIzFlzzJl7jmdtNkwOwGbn0Ks9mFAzibvumz7cQem5cRsFA2cEw2fg+uHZGbcHupLQQ==}
+    resolution: {integrity: sha512-sihaFrUzAsYBQsL9J2t69y8nfMQGwcYmggAZsk+kjPbjYZMyuf2hU8tUNTZ+P+isb6XRr8JE22TZlJxBoVdH1A==}
 
   '@esbuild/aix-ppc64@0.21.5':
     resolution: {integrity: sha512-1SDgH6ZSPTlggy1yI6+Dbkiz8xzpHJEVAlF/AM1tHPLsf5STom9rwtjE4hKAF20FfXXNTFqEYXyJNWh1GiZedQ==}
@@ -1118,15 +1133,15 @@ snapshots:
   '@codemirror/autocomplete@6.20.3':
     dependencies:
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       '@lezer/common': 1.5.2
 
   '@codemirror/commands@6.11.1':
     dependencies:
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       '@lezer/common': 1.5.2
 
   '@codemirror/lang-angular@0.1.4':
@@ -1147,7 +1162,7 @@ snapshots:
     dependencies:
       '@codemirror/autocomplete': 6.20.3
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
       '@lezer/common': 1.5.2
       '@lezer/css': 1.3.6
 
@@ -1155,7 +1170,7 @@ snapshots:
     dependencies:
       '@codemirror/autocomplete': 6.20.3
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
       '@lezer/common': 1.5.2
       '@lezer/go': 1.0.1
 
@@ -1165,8 +1180,8 @@ snapshots:
       '@codemirror/lang-css': 6.3.1
       '@codemirror/lang-javascript': 6.2.5
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       '@lezer/common': 1.5.2
       '@lezer/css': 1.3.6
       '@lezer/html': 1.3.13
@@ -1181,8 +1196,8 @@ snapshots:
       '@codemirror/autocomplete': 6.20.3
       '@codemirror/language': 6.12.4
       '@codemirror/lint': 6.9.7
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       '@lezer/common': 1.5.2
       '@lezer/javascript': 1.5.5
 
@@ -1191,8 +1206,8 @@ snapshots:
       '@codemirror/autocomplete': 6.20.3
       '@codemirror/lang-html': 6.4.12
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       '@lezer/common': 1.5.2
       '@lezer/highlight': 1.2.3
       '@lezer/lr': 1.4.10
@@ -1215,8 +1230,8 @@ snapshots:
       '@codemirror/autocomplete': 6.20.3
       '@codemirror/lang-html': 6.4.12
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       '@lezer/common': 1.5.2
       '@lezer/highlight': 1.2.3
       '@lezer/lr': 1.4.10
@@ -1226,8 +1241,8 @@ snapshots:
       '@codemirror/autocomplete': 6.20.3
       '@codemirror/lang-html': 6.4.12
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       '@lezer/common': 1.5.2
       '@lezer/markdown': 1.7.2
 
@@ -1235,7 +1250,7 @@ snapshots:
     dependencies:
       '@codemirror/lang-html': 6.4.12
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
       '@lezer/common': 1.5.2
       '@lezer/php': 1.0.6
 
@@ -1243,7 +1258,7 @@ snapshots:
     dependencies:
       '@codemirror/autocomplete': 6.20.3
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
       '@lezer/common': 1.5.2
       '@lezer/python': 1.1.19
 
@@ -1256,7 +1271,7 @@ snapshots:
     dependencies:
       '@codemirror/lang-css': 6.3.1
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
       '@lezer/common': 1.5.2
       '@lezer/sass': 1.1.0
 
@@ -1264,7 +1279,7 @@ snapshots:
     dependencies:
       '@codemirror/autocomplete': 6.20.3
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
       '@lezer/common': 1.5.2
       '@lezer/highlight': 1.2.3
       '@lezer/lr': 1.4.10
@@ -1289,8 +1304,8 @@ snapshots:
     dependencies:
       '@codemirror/autocomplete': 6.20.3
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       '@lezer/common': 1.5.2
       '@lezer/xml': 1.0.6
 
@@ -1298,7 +1313,7 @@ snapshots:
     dependencies:
       '@codemirror/autocomplete': 6.20.3
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
       '@lezer/common': 1.5.2
       '@lezer/highlight': 1.2.3
       '@lezer/lr': 1.4.10
@@ -1332,8 +1347,8 @@ snapshots:
 
   '@codemirror/language@6.12.4':
     dependencies:
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       '@lezer/common': 1.5.2
       '@lezer/highlight': 1.2.3
       '@lezer/lr': 1.4.10
@@ -1345,30 +1360,30 @@ snapshots:
 
   '@codemirror/lint@6.9.7':
     dependencies:
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       crelt: 1.0.7
 
   '@codemirror/search@6.7.2':
     dependencies:
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       crelt: 1.0.7
 
-  '@codemirror/state@6.7.5':
+  '@codemirror/state@6.7.6':
     dependencies:
       '@marijn/find-cluster-break': 1.0.4
 
   '@codemirror/theme-one-dark@6.1.3':
     dependencies:
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       '@lezer/highlight': 1.2.3
 
-  '@codemirror/view@6.43.12':
+  '@codemirror/view@6.43.13':
     dependencies:
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
       crelt: 1.0.7
       style-mod: 4.1.4
       w3c-keyname: 2.2.8
@@ -1550,11 +1565,11 @@ snapshots:
 
   '@marijn/find-cluster-break@1.0.4': {}
 
-  '@milkdown/components@7.22.1(@codemirror/language@6.12.4)(@codemirror/state@6.7.5)(@codemirror/view@6.43.12)(typescript@5.9.3)':
+  '@milkdown/components@7.22.1(@codemirror/language@6.12.4)(@codemirror/state@6.7.6)(@codemirror/view@6.43.13)(typescript@5.9.3)':
     dependencies:
       '@codemirror/language': 6.12.4
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
       '@floating-ui/dom': 1.8.0
       '@milkdown/core': 7.22.1
       '@milkdown/ctx': 7.22.1
@@ -1594,10 +1609,10 @@ snapshots:
       '@codemirror/commands': 6.11.1
       '@codemirror/language': 6.12.4
       '@codemirror/language-data': 6.5.2
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
       '@codemirror/theme-one-dark': 6.1.3
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
-      '@milkdown/kit': 7.22.1(@codemirror/language@6.12.4)(@codemirror/state@6.7.5)(@codemirror/view@6.43.12)(typescript@5.9.3)
+      '@milkdown/kit': 7.22.1(@codemirror/language@6.12.4)(@codemirror/state@6.7.6)(@codemirror/view@6.43.13)(typescript@5.9.3)
       '@types/lodash-es': 4.17.12
       clsx: 2.1.1
       codemirror: 6.0.2
@@ -1621,9 +1636,9 @@ snapshots:
 
   '@milkdown/exception@7.22.1': {}
 
-  '@milkdown/kit@7.22.1(@codemirror/language@6.12.4)(@codemirror/state@6.7.5)(@codemirror/view@6.43.12)(typescript@5.9.3)':
+  '@milkdown/kit@7.22.1(@codemirror/language@6.12.4)(@codemirror/state@6.7.6)(@codemirror/view@6.43.13)(typescript@5.9.3)':
     dependencies:
-      '@milkdown/components': 7.22.1(@codemirror/language@6.12.4)(@codemirror/state@6.7.5)(@codemirror/view@6.43.12)(typescript@5.9.3)
+      '@milkdown/components': 7.22.1(@codemirror/language@6.12.4)(@codemirror/state@6.7.6)(@codemirror/view@6.43.13)(typescript@5.9.3)
       '@milkdown/core': 7.22.1
       '@milkdown/ctx': 7.22.1
       '@milkdown/exception': 7.22.1
@@ -2036,8 +2051,8 @@ snapshots:
       '@codemirror/language': 6.12.4
       '@codemirror/lint': 6.9.7
       '@codemirror/search': 6.7.2
-      '@codemirror/state': 6.7.5
+      '@codemirror/state': 6.7.6
-      '@codemirror/view': 6.43.12
+      '@codemirror/view': 6.43.13
 
   commander@15.0.0: {}
 

frontend/src/App.vue

@@ -1,13 +1,39 @@
 <script setup>
-import { computed, watch } from 'vue'
+import { computed, onMounted, onBeforeUnmount, watch } from 'vue'
 import { useRoute } from 'vue-router'
 import TopBar from './components/TopBar.vue'
 import ThemeSwitcher from './components/ThemeSwitcher.vue'
+import ImgLightbox from './components/ImgLightbox.vue'
 import YohakuTop from './ui/yohaku/YohakuTop.vue'
 import YohakuFoot from './ui/yohaku/YohakuFoot.vue'
 import { site, setAdminScope } from './site'
 
 const route = useRoute()
+
+// 正文代码块复制按钮（事件委托：复制按钮是 enhanceProse 注入的静态 HTML）
+function onCopyClick(e) {
+  const btn = e.target.closest?.('.pre-copy')
+  if (!btn) return
+  const pre = btn.closest('.pre-wrap')?.querySelector('pre')
+  if (!pre) return
+  navigator.clipboard
+    .writeText(pre.innerText.replace(/\n$/, ''))
+    .then(() => {
+      btn.textContent = '已复制'
+      btn.classList.add('done')
+      setTimeout(() => {
+        btn.textContent = '复制'
+        btn.classList.remove('done')
+      }, 1600)
+    })
+    .catch(() => {
+      btn.textContent = '复制失败'
+      setTimeout(() => (btn.textContent = '复制'), 1600)
+    })
+}
+onMounted(() => document.addEventListener('click', onCopyClick))
+onBeforeUnmount(() => document.removeEventListener('click', onCopyClick))
+
 const isAdmin = computed(() => route.path.startsWith('/admin'))
 // vivid 只在公开前台生效：后台永远走 classic 那套（--admin-* token + 原 data-ui/data-theme），
 // 不受 ui_id 影响。vivid.css 会命中 .btn / .input 这类全局类，后台表单正在用，
@@ -36,6 +62,8 @@ watch(
   <RouterView />
   <YohakuFoot v-if="isVivid" />
   <!-- classic 的页脚信息在 RightRail 卡片下方的小字区（Twitter 式侧栏页脚） -->
+  <!-- 图片预览层：时间线 / 详情页的配图点开时全屏展示 -->
+  <ImgLightbox />
   <!-- 桌面端：左栏底部放 inline 形态；窄屏：左栏收起，浮动按钮兜底。
        vivid 的顶部导航自带切换器，浮动那个就不重复出现了。 -->
   <ThemeSwitcher v-if="!isVivid" variant="floating" class="theme-floating-only" />

frontend/src/admin/AdminLayout.vue

@@ -1,5 +1,6 @@
 <script setup>
 import { computed, onMounted, onBeforeUnmount, ref, watch } from 'vue'
+import ToastStack from './ToastStack.vue'
 import { useRoute, useRouter, RouterLink, RouterView } from 'vue-router'
 import { checkAuth } from './auth'
 import { adminApi, session } from '../api'
@@ -60,6 +61,7 @@ const crumb = computed(() => {
   if (p.endsWith('/new')) return '写新的'
   if (/^\/admin\/\d+/.test(p)) return '编辑文章'
   if (p.endsWith('/files')) return '文件'
+  if (p.endsWith('/comments')) return '评论'
   if (p.endsWith('/tags')) return '标签'
   if (p.endsWith('/settings')) return '设置'
   if (p === '/admin' || p === '/admin/') return '总览'
@@ -95,6 +97,7 @@ watch(() => route.path, () => loadCounts())
 
 <template>
   <div v-if="ready" class="admin-shell">
+    <ToastStack />
     <aside class="admin-side">
       <div class="brand">
         <RouterLink to="/admin" class="name">{{ site.site_title || 'ONE' }}</RouterLink>
@@ -124,6 +127,10 @@ watch(() => route.path, () => loadCounts())
           <span class="ic">▣</span>
           <span>文件</span>
         </RouterLink>
+        <RouterLink to="/admin/comments" class="item">
+          <span class="ic">❝</span>
+          <span>评论</span>
+        </RouterLink>
         <div class="group">操作</div>
         <RouterLink to="/admin/new" class="item">
           <span class="ic">✎</span>

frontend/src/admin/CommentsView.vue

@@ -0,0 +1,218 @@
+<script setup>
+import { computed, onMounted, ref, watch } from 'vue'
+import { toastOk, toastErr } from './toast'
+import { useRoute, useRouter } from 'vue-router'
+import { adminApi } from '../api'
+import { relativeDate, stripTags } from '../utils'
+
+// 评论管理：待审队列优先，通过 / 删除 / 禁言都在行内完成。
+// 删除走软删（墓碑保楼层）；禁言按读者维度，禁言中的行上有标记。
+
+const route = useRoute()
+const router = useRouter()
+
+const items = ref([])
+const total = ref(0)
+const loading = ref(true)
+const error = ref('')
+const status = ref(route.query.status === 'any' || route.query.status === 'visible' ? route.query.status : 'pending')
+const page = computed(() => Number(route.query.page || 1))
+const size = 20
+
+let seq = 0
+async function load() {
+  const my = ++seq
+  loading.value = true
+  error.value = ''
+  try {
+    const data = await adminApi.comments({ status: status.value, page: page.value, size })
+    if (my !== seq) return
+    items.value = data.items || []
+    total.value = data.total || 0
+  } catch (e) {
+    if (my !== seq) return
+    error.value = e.message || '加载失败'
+    items.value = []
+  } finally {
+    if (my === seq) loading.value = false
+  }
+}
+onMounted(load)
+watch([status, page], load)
+
+function setStatus(v) {
+  status.value = v
+  router.replace({ query: { ...route.query, status: v === 'pending' ? undefined : v, page: 1 } })
+}
+
+async function approve(id) {
+  await adminApi.approveComment(id)
+  toastOk('已通过，前台可见')
+  load()
+}
+
+async function remove(id) {
+  if (!window.confirm('删除这条评论？正文清空，楼层保留为「已删除」。')) return
+  await adminApi.deleteComment(id)
+  toastOk('已删除')
+  load()
+}
+
+async function banToggle(c) {
+  const banned = !c.user?.banned
+  if (!window.confirm(banned ? `禁言「${c.user?.name || '该用户'}」？禁言后其无法再发表评论。` : '解除禁言？')) return
+  await adminApi.setReaderBanned(c.user?.id, banned)
+  toastOk(banned ? '已禁言' : '已解除禁言')
+  c.user = { ...(c.user || {}), banned }
+}
+
+const tabs = [
+  { label: '待审', value: 'pending' },
+  { label: '已通过', value: 'visible' },
+  { label: '全部', value: 'any' }
+]
+</script>
+
+<template>
+  <section>
+    <header style="display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 14px;">
+      <h1 style="font-family: var(--serif); font-size: 22px;">
+        评论 <span style="font-family: var(--sans); font-size: 13px; color: var(--admin-muted); font-weight: 400;">{{ total }}</span>
+      </h1>
+    </header>
+
+    <div class="posts-toolbar" style="margin-bottom: 16px;">
+      <button class="chip" :class="{ on: status === 'pending' }" @click="setStatus('pending')">待审</button>
+      <button class="chip" :class="{ on: status === 'visible' }" @click="setStatus('visible')">已通过</button>
+      <button class="chip" :class="{ on: status === 'any' }" @click="setStatus('any')">全部</button>
+    </div>
+
+    <div v-if="loading" class="loading">载入中…</div>
+    <div v-else-if="error" class="empty">{{ error }}</div>
+    <div v-else-if="!items.length" class="empty">
+      {{ status === 'pending' ? '没有待审的评论。' : '还没有评论。' }}
+    </div>
+
+    <template v-else>
+      <div v-for="c in items" :key="c.id" class="cm-row">
+        <div class="cm-ava" aria-hidden="true">{{ (c.user?.name || '?').slice(0, 1) }}</div>
+        <div class="cm-body-col">
+          <div class="cm-row-head">
+            <span class="cm-name" :title="c.user?.handle || ''">{{ c.user?.name || '匿名' }}</span>
+            <span v-if="c.user?.banned" class="cm-flag">禁言中</span>
+            <span v-if="c.status === 'pending'" class="cm-flag pend">待审</span>
+            <span class="cm-time" :title="c.created_at">{{ relativeDate(c.created_at) }}</span>
+          </div>
+          <div class="cm-text">{{ stripTags(c.body_html) }}</div>
+          <div class="cm-post">on {{ c.post_title || '无题' }}</div>
+        </div>
+        <div class="cm-acts">
+          <a v-if="c.status === 'pending'" href="#" @click.prevent="approve(c.id)">通过</a>
+          <a href="#" class="danger" @click.prevent="remove(c.id)">删除</a>
+          <a href="#" @click.prevent="banToggle(c)">{{ c.user?.banned ? '解除禁言' : '禁言' }}</a>
+        </div>
+      </div>
+
+      <nav
+        v-if="pageCount > 1"
+        aria-label="分页"
+        style="display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 18px;"
+      >
+        <button class="btn" :disabled="page <= 1" @click="router.replace({ query: { ...route.query, page: page - 1 } })" aria-label="上一页">
+          ← 上一页
+        </button>
+        <span style="font-size: 13px; color: var(--admin-muted);" aria-live="polite">第 {{ page }} / {{ pageCount }} 页</span>
+        <button class="btn" :disabled="page >= pageCount" @click="router.replace({ query: { ...route.query, page: page + 1 } })" aria-label="下一页">
+          下一页 →
+        </button>
+      </nav>
+    </template>
+  </section>
+</template>
+
+<style scoped>
+.cm-row {
+  display: grid;
+  grid-template-columns: 40px minmax(0, 1fr) auto;
+  gap: 12px;
+  padding: 14px 4px;
+  border-bottom: 1px solid var(--admin-line-soft);
+}
+
+.cm-ava {
+  width: 40px;
+  height: 40px;
+  border-radius: 50%;
+  background: var(--admin-paper-sunken);
+  color: var(--admin-ink);
+  display: grid;
+  place-items: center;
+  font-family: var(--serif);
+  font-size: 16px;
+  user-select: none;
+}
+
+.cm-row-head {
+  display: flex;
+  align-items: baseline;
+  flex-wrap: wrap;
+  gap: 8px;
+  font-size: 13px;
+  color: var(--admin-muted);
+}
+
+.cm-name {
+  font-weight: 600;
+  color: var(--admin-ink);
+}
+
+.cm-flag {
+  padding: 0 5px;
+  border: 1px solid var(--admin-line);
+  border-radius: 2px;
+  font-size: 11px;
+  color: var(--admin-muted);
+}
+
+.cm-flag.pend {
+  color: #9a5b45;
+  border-color: #ddcdc2;
+}
+
+.cm-time {
+  color: var(--admin-faint);
+}
+
+.cm-text {
+  margin-top: 4px;
+  font-size: 14.5px;
+  line-height: 1.75;
+  color: var(--admin-ink);
+  overflow-wrap: anywhere;
+}
+
+.cm-post {
+  margin-top: 4px;
+  font-size: 12px;
+  color: var(--admin-faint);
+}
+
+.cm-acts {
+  display: flex;
+  gap: 12px;
+  align-items: baseline;
+  font-size: 12.5px;
+}
+
+.cm-acts a {
+  color: var(--admin-muted);
+}
+
+.cm-acts a:hover {
+  color: var(--admin-accent);
+}
+
+.cm-acts a.danger:hover {
+  color: #b4553f;
+}
+</style>

frontend/src/admin/EditorView.vue

@@ -1,10 +1,16 @@
 <script setup>
 import { computed, nextTick, onBeforeUnmount, onMounted, reactive, ref, watch } from 'vue'
+import { toast, toastOk, toastErr, toastUpdate, toastDone } from './toast'
 import { onBeforeRouteLeave, useRoute, useRouter } from 'vue-router'
 import { adminApi } from '../api'
+import { site } from '../site'
 import { Crepe, CrepeFeature } from '@milkdown/crepe'
 import '@milkdown/crepe/theme/common/style.css'
 import '@milkdown/crepe/theme/frame.css'
+import { EditorView as CMView, keymap } from '@codemirror/view'
+import { EditorState } from '@codemirror/state'
+import { markdown as markdownLang } from '@codemirror/lang-markdown'
+import { history, defaultKeymap, historyKeymap, indentWithTab } from '@codemirror/commands'
 
 const route = useRoute()
 const router = useRouter()
@@ -184,6 +190,10 @@ onBeforeUnmount(() => {
     crepe.destroy()
     crepe = null
   }
+  if (cmView) {
+    cmView.destroy()
+    cmView = null
+  }
 })
 
 // ---------- mode switching ----------
@@ -195,6 +205,10 @@ async function switchMode(next) {
       crepe.destroy()
       crepe = null
     }
+    // CM 懒挂载；已挂载就把 wysiwyg 期间产生的 markdown 灌回来
+    await nextTick()
+    mountCM()
+    syncCM()
   } else {
     // MD → WYSIWYG: spin up crepe with the current markdown
     await nextTick()
@@ -267,6 +281,9 @@ async function autosave() {
 function applySaved(saved) {
   form.slug = saved.slug
   form.status = saved.status
+  // 自动摘要/自动封面在服务端补齐的，回写表单让站主看见（清空仍会保留为空）
+  if (typeof saved.summary === 'string') form.summary = saved.summary
+  if (typeof saved.cover_url === 'string') form.cover_url = saved.cover_url
   publishedLocal.value = isoToLocal(saved.published_at)
 }
 
@@ -303,7 +320,7 @@ function buildPayload() {
 async function save(status) {
   if (status) form.status = status
   if (!isEdit.value && !form.content_md.trim() && !form.title.trim()) {
-    error.value = '先写点什么再保存'
+    toastErr('先写点什么再保存')
     return
   }
   saving.value = true
@@ -317,12 +334,17 @@ async function save(status) {
       const created = await adminApi.createPost(payload)
       localStorage.removeItem(DRAFT_KEY)
       dirty.value = false
+      toastOk('已创建')
       router.replace(`/admin/${created.id}`)
       return
     }
     dirty.value = false
     savedAt.value = new Date().toLocaleTimeString('zh-CN', { hour12: false })
+    // 手动保存（按钮/⌘S/发布）给回音；自动保存静默，不打扰
+    const label = status === 'published' ? '已发布' : status === 'draft' ? '已转回草稿' : '已保存'
+    toastOk(label + ' · ' + savedAt.value)
   } catch (e) {
+    toastErr(e.message || '保存失败')
     error.value = e.message || '保存失败'
   } finally {
     saving.value = false
@@ -365,6 +387,14 @@ onBeforeRouteLeave(() => {
 
 // ---------- 标签 ----------
 
+// 标签是长文的组织方式；切到短文时把已选的清掉（后端落库时也会强制丢弃）
+watch(
+  () => form.kind,
+  (k) => {
+    if (k === 'short') form.tags = []
+  }
+)
+
 function addTag() {
   const v = tagInput.value.trim().replace(/[,，]$/, '')
   if (!v) return
@@ -391,6 +421,82 @@ function clearCover() {
 // ---------- 工具栏：Markdown 模式插入 + 通用动作 ----------
 
 const mdPane = ref(null)
+
+// ---------- CodeMirror 源码模式 ----------
+// md 页签不是裸 textarea：语法高亮 + 行内历史（⌘Z），粘贴/拖图片直接上传。
+// markdown 仍是唯一真相源——CM 的改动写回 form.content_md，
+// 外部改动（转存替换、wysiwyg 切回）用 syncCM 全量灌回。
+let cmView = null
+const cmTheme = CMView.theme({
+  '&': { color: 'var(--admin-ink)', backgroundColor: 'transparent', fontSize: '13.5px' },
+  '.cm-content': { fontFamily: 'ui-monospace, SFMono-Regular, Menlo, monospace', lineHeight: '1.75', padding: '12px 0 40vh' },
+  '.cm-scroller': { overflow: 'auto', maxHeight: '70vh' },
+  '.cm-line': { padding: '0 2px' },
+  '&.cm-focused': { outline: 'none' },
+  '.cm-cursor': { borderLeftColor: 'var(--admin-accent)' },
+  '.cm-selectionBackground, ::selection': { backgroundColor: 'color-mix(in srgb, var(--admin-accent) 18%, transparent) !important' },
+  '.cm-activeLine': { backgroundColor: 'color-mix(in srgb, var(--admin-accent) 6%, transparent)' },
+  '.cm-heading, .cm-header': { color: 'var(--admin-accent)', fontWeight: '600' },
+  '.cm-link, .cm-url': { color: 'var(--admin-accent)', textDecoration: 'underline' },
+  '.cm-emphasis': { fontStyle: 'italic' },
+  '.cm-strong': { fontWeight: '700' },
+  '.cm-code, .cm-monospace': { fontFamily: 'ui-monospace, SFMono-Regular, Menlo, monospace', color: 'var(--admin-muted)' }
+})
+
+function handleEditorFiles(files, view) {
+  const list = [...files].filter((f) => f.type.startsWith('image/'))
+  if (!list.length) return false
+  view.dispatch({
+    changes: { from: view.state.selection.main.from, insert: ' ' }
+  })
+  ;[...list].forEach((f) => uploadOne(f, { insertImage: true }))
+  return true
+}
+
+function mountCM() {
+  if (cmView || !mdPane.value) return
+  cmView = new CMView({
+    parent: mdPane.value,
+    state: EditorState.create({
+      doc: form.content_md,
+      extensions: [
+        history(),
+        keymap.of([
+          { key: 'Mod-b', run: () => { tbBold(); return true } },
+          { key: 'Mod-i', run: () => { tbItalic(); return true } },
+          { key: 'Mod-e', run: () => { tbCode(); return true } },
+          { key: 'Mod-k', run: () => { openLink(); return true } }
+        ]),
+        keymap.of([...defaultKeymap, ...historyKeymap, indentWithTab]),
+        markdownLang(),
+        cmTheme,
+        CMView.updateListener.of((u) => {
+          if (u.docChanged) form.content_md = u.state.doc.toString()
+        }),
+        CMView.domEventHandlers({
+          paste: (e, view) => handleEditorFiles(e.clipboardData?.files, view),
+          drop: (e, view) => {
+            if (e.dataTransfer?.files?.length) {
+              e.preventDefault()
+              return handleEditorFiles(e.dataTransfer.files, view)
+            }
+            return false
+          }
+        })
+      ]
+    })
+  })
+}
+
+// 用 form.content_md 的当前值整段灌回（进入 md 页签、转存替换后调用）
+function syncCM() {
+  if (!cmView) return
+  const cur = cmView.state.doc.toString()
+  if (cur === form.content_md) return
+  cmView.dispatch({
+    changes: { from: 0, to: cur.length, insert: form.content_md }
+  })
+}
 const showLinkInput = ref(false)
 const showImageInput = ref(false)
 const linkText = ref('')
@@ -399,22 +505,31 @@ const imageUrl = ref('')
 const imageAlt = ref('')
 
 function insertAtCursor(text, selStart, selEnd) {
+  if (cmView) {
+    if (selStart == null) {
+      const s = cmView.state.selection.main
+      selStart = s.from
+      selEnd = s.to
+    }
+    cmView.dispatch({
+      changes: { from: selStart, to: selEnd, insert: text },
+      selection: { anchor: selStart + text.length }
+    })
+    cmView.focus()
+    return
+  }
   const before = form.content_md.slice(0, selStart)
   const after = form.content_md.slice(selEnd)
   form.content_md = before + text + after
-  nextTick(() => {
-    if (!mdPane.value) return
-    const newPos = selStart + text.length
-    mdPane.value.focus()
-    mdPane.value.setSelectionRange(newPos, newPos)
-  })
 }
 
 function withSelection(fn) {
-  const el = mdPane.value
+  if (cmView) {
-  const start = el ? el.selectionStart : form.content_md.length
+    const sel = cmView.state.selection.main
-  const end = el ? el.selectionEnd : form.content_md.length
+    fn(sel.from, sel.to)
-  fn(start, end)
+    return
+  }
+  fn(form.content_md.length, form.content_md.length)
 }
 
 function tbBold() {
@@ -499,6 +614,15 @@ function tbTask() {
 function tbHr() {
   withSelection((s, e) => insertAtCursor('\n---\n', s, e))
 }
+function tbTable() {
+  withSelection((s, e) =>
+    insertAtCursor(
+      '\n| 列 A | 列 B |\n| --- | --- |\n| 内容 | 内容 |\n| 内容 | 内容 |\n',
+      s,
+      e
+    )
+  )
+}
 
 function openLink() {
   showLinkInput.value = true
@@ -526,23 +650,110 @@ function commitImage() {
 }
 
 // ---------- 上传（封面 / 编辑器插图共用） ----------
+// toast 用共享的 ./toast（ToastStack 渲染在 AdminLayout）。
 // 后台「高级 → 自定义 JS」无关；走 /api/admin/files（FormData）。
 const uploadingImage = ref(false)
 
-async function uploadOne(file) {
+// 与后端 allowFileExt / 50MB 上限一致：上传前本地校验，省一趟白跑
-  const fd = new FormData()
+const ALLOW_UPLOAD_EXT = ['jpg', 'jpeg', 'png', 'webp', 'gif', 'avif', 'pdf', 'zip', 'txt']
-  fd.append('file', file)
+const MAX_UPLOAD_MB = 50
+
+function validateFile(file) {
+  const ext = (file.name.split('.').pop() || '').toLowerCase()
+  if (!ALLOW_UPLOAD_EXT.includes(ext)) {
+    return `不支持的类型 .${ext}（允许：${ALLOW_UPLOAD_EXT.join('/')}）`
+  }
+  if (file.size > MAX_UPLOAD_MB * 1024 * 1024) {
+    return `${file.name} 超过 ${MAX_UPLOAD_MB}MB 上限`
+  }
+  return ''
+}
+
+// opts.cmView 传了就把结果以 markdown 图片插到该编辑器光标处（md 页签粘贴/拖拽）
+async function uploadOne(file, opts = {}) {
+  const bad = validateFile(file)
+  if (bad) {
+    toast(bad, 'err')
+    throw new Error(bad)
+  }
+  const tid = toast(`上传 ${file.name} 0%`, 'info', 60000)
   try {
-    const data = await adminApi.uploadFiles(fd)
+    const data = await adminApi.uploadFile(file, (p) =>
+      toastUpdate(tid, `上传 ${file.name} ${Math.round(p * 100)}%`)
+    )
     const f = Array.isArray(data) ? data[0] : null
     if (!f || !f.url) throw new Error('上传失败')
+    toastDone(tid, `${file.name} 上传完成`)
+    if (opts.cmView) {
+      const v = opts.cmView
+      const pos = v.state.selection.main.from
+      v.dispatch({ changes: { from: pos, insert: `![](${f.url})\n` } })
+    }
     return f.url
   } catch (e) {
+    toastUpdate(tid, `${file.name} 上传失败：${e.message || '未知错误'}`, 'err')
     error.value = e.message || '上传失败'
     throw e
   }
 }
 
+// ---------- 外链图片转存 ----------
+// xLog 的 Cloud：正文里的外链 <img> 一键抓回自己的存储（后端走 SSRF
+// 防护拨号 + 同一套白名单/去重），成功后原地替换 markdown 里的 URL。
+const importing = ref(false)
+
+function externalImages(md) {
+  const own = [site.uploads_public_base, location.origin].filter(Boolean)
+  const out = []
+  const re = /!\[[^\]]*\]\((https?:\/\/[^)\s]+)\)/g
+  let m
+  while ((m = re.exec(md))) {
+    const u = m[1]
+    if (!own.some((b) => u.startsWith(b)) && !u.startsWith('/uploads/')) out.push(u)
+  }
+  return [...new Set(out)]
+}
+
+async function importExternal() {
+  if (importing.value) return
+  const urls = externalImages(form.content_md)
+  if (!urls.length) {
+    toast('正文里没有外链图片', 'info')
+    return
+  }
+  importing.value = true
+  const tid = toast(`转存外链图片 0/${urls.length}…`, 'info', 120000)
+  try {
+    const data = await adminApi.importFiles(urls)
+    // 后端按原址回：source -> 转存后的文件（同内容去重时可能是已有行）
+    const ok = new Map((data.files || []).map((e) => [e.source, e.file]))
+    const errs = data.errors || {}
+    let done = 0
+    let changed = false
+    form.content_md = form.content_md.replace(
+      /!\[([^\]]*)\]\((https?:\/\/[^)\s]+)\)/g,
+      (whole, alt, u) => {
+        if (!ok.has(u)) return whole
+        done++
+        toastUpdate(tid, `转存外链图片 ${done}/${urls.length}…`)
+        changed = true
+        return `![${alt}](${ok.get(u).url})`
+      }
+    )
+    if (changed) syncCM()
+    const fail = Object.keys(errs).length
+    if (fail) {
+      toastUpdate(tid, `转存完成：${done} 成功，${fail} 失败（${Object.values(errs)[0]}）`, fail ? 'err' : 'ok')
+    } else {
+      toastDone(tid, `转存完成：${done} 张已入自己的存储`)
+    }
+  } catch (e) {
+    toastUpdate(tid, '转存失败：' + (e.message || ''), 'err')
+  } finally {
+    importing.value = false
+  }
+}
+
 const coverInput = ref(null)
 async function onCoverPick(e) {
   const file = e.target.files && e.target.files[0]
@@ -610,15 +821,29 @@ function insertDate() {
 }
 
 // 工具栏按钮的统一定义（用作 v-for 渲染）
+// 快捷键的展示形态（xLog 同款）：Mod 在 Mac 上显示 ⌘，其余显示 Ctrl
+const isMac = typeof navigator !== 'undefined' && /Mac|iP(hone|ad|od)/.test(navigator.platform || '')
+function keyDisplay(shortcut) {
+  if (!shortcut) return ''
+  return '（' + shortcut
+    .replace('Mod', isMac ? '⌘' : 'Ctrl')
+    .replace(/-([a-z])$/i, (_, c) => c.toUpperCase()) + '）'
+}
+
 const tbGroups = computed(() => [
   {
     label: '格式',
     items: [
-      { key: 'b', label: 'B', title: '加粗', run: tbBold, show: mode.value === 'md' },
+      { key: 'b', title: '加粗', shortcut: 'Mod-b', run: tbBold, show: mode.value === 'md',
-      { key: 'i', label: 'I', title: '斜体', run: tbItalic, italic: true, show: mode.value === 'md' },
+        icon: 'M6 4h8a4 4 0 0 1 0 8H6zM6 12h9a4 4 0 0 1 0 8H6z', fill: true },
-      { key: 's', label: 'S', title: '删除线', run: tbStrike, show: mode.value === 'md' },
+      { key: 'i', title: '斜体', shortcut: 'Mod-i', run: tbItalic, show: mode.value === 'md',
-      { key: 'code', label: '<>', title: '行内代码', run: tbCode, mono: true, show: mode.value === 'md' },
+        icon: 'M19 4h-9M14 20H5M15 4L9 20' },
-      { key: 'cb', label: '```', title: '代码块', run: tbCodeBlock, mono: true, show: mode.value === 'md' }
+      { key: 's', title: '删除线', run: tbStrike, show: mode.value === 'md',
+        icon: 'M16 4H9a3 3 0 0 0-2.83 4M14 12a4 4 0 0 1 0 8H6M4 12h16' },
+      { key: 'code', title: '行内代码', shortcut: 'Mod-e', run: tbCode, show: mode.value === 'md',
+        icon: 'M16 18l6-6-6-6M8 6l-6 6 6 6' },
+      { key: 'cb', title: '代码块', run: tbCodeBlock, show: mode.value === 'md',
+        icon: 'M9 10l-2 2.5L9 15M15 10l2 2.5-2 2.5M4 5h16a1 1 0 0 1 1 1v12a1 1 0 0 1-1 1H4a1 1 0 0 1-1-1V6a1 1 0 0 1 1-1z' }
     ]
   },
   {
@@ -626,19 +851,29 @@ const tbGroups = computed(() => [
     items: [
       { key: 'h2', label: 'H2', title: '二级标题', run: tbH2, show: mode.value === 'md' },
       { key: 'h3', label: 'H3', title: '三级标题', run: tbH3, show: mode.value === 'md' },
-      { key: 'q', label: '"', title: '引用', run: tbQuote, show: mode.value === 'md' },
+      { key: 'q', title: '引用', run: tbQuote, show: mode.value === 'md',
-      { key: 'ul', label: '•', title: '无序列表', run: tbUl, show: mode.value === 'md' },
+        icon: 'M3 21c3 0 7-1 7-8V5c0-1.25-.76-2.02-2-2H4c-1.25 0-2 .75-2 1.97V11c0 1.25.75 2 2 2 1 0 1 0 1 1v1c0 1-1 2-2 2s-1 .01-1 1.03V20c0 1 0 1 1 1zM15 21c3 0 7-1 7-8V5c0-1.25-.76-2.02-2-2h-4c-1.25 0-2 .75-2 1.97V11c0 1.25.75 2 2 2 1 0 1 0 1 1v1c0 1-1 2-2 2s-1 .01-1 1.03V20c0 1 0 1 1 1z', fill: true },
-      { key: 'ol', label: '1.', title: '有序列表', run: tbOl, show: mode.value === 'md' },
+      { key: 'ul', title: '无序列表', run: tbUl, show: mode.value === 'md',
-      { key: 'task', label: '☐', title: '任务列表', run: tbTask, show: mode.value === 'md' },
+        icon: 'M8 6h13M8 12h13M8 18h13M3 6h.01M3 12h.01M3 18h.01' },
-      { key: 'hr', label: '—', title: '分隔线', run: tbHr, show: mode.value === 'md' }
+      { key: 'ol', title: '有序列表', run: tbOl, show: mode.value === 'md',
+        icon: 'M10 6h11M10 12h11M10 18h11M4 6h1v4M4 10h2M6 18H4c0-1 2-2 2-3s-1-1.5-2-1' },
+      { key: 'task', title: '任务列表', run: tbTask, show: mode.value === 'md',
+        icon: 'M9 11l3 3L22 4M21 12v7a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11' },
+      { key: 'hr', title: '分隔线', run: tbHr, show: mode.value === 'md',
+        icon: 'M5 12h14' }
     ]
   },
   {
     label: '插入',
     items: [
-      { key: 'link', label: '🔗', title: '链接', run: openLink, show: mode.value === 'md' },
+      { key: 'link', title: '链接', shortcut: 'Mod-k', run: openLink, show: mode.value === 'md',
-      { key: 'img', label: '🖼', title: '图片', run: openImage, show: mode.value === 'md' },
+        icon: 'M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71' },
-      { key: 'date', label: '📅', title: '插入今天日期', run: insertDate, show: mode.value === 'md' }
+      { key: 'img', title: '图片', run: openImage, show: mode.value === 'md',
+        icon: 'M21 15l-5-5L5 21M3 5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2zM8.5 8.5h.01' },
+      { key: 'table', title: '表格', run: tbTable, show: mode.value === 'md',
+        icon: 'M3 5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2zM3 10h18M10 21V10' },
+      { key: 'date', title: '插入今天日期', run: insertDate, show: mode.value === 'md',
+        icon: 'M16 2v4M8 2v4M3 10h18M5 4h14a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2z' }
     ]
   }
 ])
@@ -685,6 +920,14 @@ const tbGroups = computed(() => [
           <div class="editor-mode">
             <button :class="{ on: mode === 'wysiwyg' }" @click="switchMode('wysiwyg')">富文本</button>
             <button :class="{ on: mode === 'md' }" @click="switchMode('md')">Markdown</button>
+            <button
+              class="btn"
+              :disabled="importing"
+              title="把正文里的外链图片抓回自己的存储"
+              @click="importExternal"
+            >
+              {{ importing ? '转存中…' : '⇲ 转存外链图' }}
+            </button>
           </div>
         </div>
 
@@ -704,11 +947,18 @@ const tbGroups = computed(() => [
               :key="it.key"
               type="button"
               class="tb-btn"
-              :class="{ italic: it.italic, mono: it.mono }"
+              :title="it.title + keyDisplay(it.shortcut)"
-              :title="it.title"
               :aria-label="it.title"
               @click="it.run()"
-            >{{ it.label }}</button>
+            >
+              <svg v-if="it.icon" viewBox="0 0 24 24" aria-hidden="true"
+                :fill="it.fill ? 'currentColor' : 'none'"
+                :stroke="it.fill ? 'none' : 'currentColor'" stroke-width="2"
+                stroke-linecap="round" stroke-linejoin="round">
+                <path :d="it.icon" />
+              </svg>
+              <span v-else class="tb-text">{{ it.label }}</span>
+            </button>
           </div>
         </div>
 
@@ -767,16 +1017,13 @@ const tbGroups = computed(() => [
 
         <!-- editor area -->
         <div v-show="mode === 'wysiwyg'" ref="editorEl"></div>
-        <textarea
+        <!-- md 页签：CodeMirror 6（语法高亮/历史/粘贴拖拽上传），markdown 唯一真相源 -->
-          v-show="mode === 'md'"
+        <div v-show="mode === 'md'" ref="mdPane" class="md-pane" aria-label="Markdown 正文"></div>
-          ref="mdPane"
+
-          class="md-pane"
+        <!-- 轻提示栈 -->
-          v-model="form.content_md"
+        <div class="toast-stack" aria-live="polite">
-          placeholder="直接写 Markdown…"
+          <div v-for="t in toasts" :key="t.id" class="toast" :class="t.type">{{ t.text }}</div>
-          aria-label="Markdown 正文"
+        </div>
-          @paste="onMdPaste"
-          @drop="onMdDrop"
-        ></textarea>
 
         <div class="editor-stats">
           <span><strong>{{ cjkChars }}</strong> 汉字</span>
@@ -848,7 +1095,7 @@ const tbGroups = computed(() => [
             ></textarea>
           </div>
 
-          <div class="field">
+          <div v-if="form.kind !== 'short'" class="field">
             <label>标签</label>
             <div v-if="form.tags.length" style="display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px;">
               <span v-for="t in form.tags" :key="t" class="chip">

frontend/src/admin/FilesView.vue

@@ -1,5 +1,6 @@
 <script setup>
 import { computed, onBeforeUnmount, onMounted, ref, watch } from 'vue'
+import { toastOk, toastErr } from './toast'
 import { useRoute, useRouter } from 'vue-router'
 import { adminApi } from '../api'
 import { relativeDate } from '../utils'
@@ -55,8 +56,10 @@ async function upload(files) {
     const fd = new FormData()
     for (const f of files) fd.append('file', f)
     await adminApi.uploadFiles(fd)
+    toastOk(`已上传 ${files.length} 个文件`)
     await load()
   } catch (e) {
+    toastErr(e.message || '上传失败')
     uploadError.value = e.message || '上传失败'
   } finally {
     uploading.value = false
@@ -75,6 +78,7 @@ function onDrop(e) {
 async function copyUrl(f) {
   try {
     await navigator.clipboard.writeText(f.url)
+    toastOk('链接已复制')
     copiedId.value = f.id
     setTimeout(() => {
       if (copiedId.value === f.id) copiedId.value = 0
@@ -89,10 +93,12 @@ async function remove(f) {
   if (!window.confirm(`删除「${f.name}」？存储里的文件会一并删除，引用它的文章将失效。`)) return
   try {
     await adminApi.deleteFile(f.id)
+    toastOk(`已删除「${f.name}」`)
     // 当前页删空时退一页，其余直接重载
     if (items.value.length === 1 && page.value > 1) router.replace({ query: { ...route.query, page: page.value - 1 } })
     else load()
   } catch (e) {
+    toastErr(e.message || '删除失败')
     error.value = e.message || '删除失败'
   }
 }

frontend/src/admin/LoginView.vue

@@ -1,5 +1,7 @@
 <script setup>
 import { ref } from 'vue'
+import { toastOk, toastErr } from './toast'
+import ToastStack from './ToastStack.vue'
 import { useRouter } from 'vue-router'
 import { adminApi, session } from '../api'
 import { site } from '../site'
@@ -17,8 +19,10 @@ async function submit() {
     const data = await adminApi.login(username.value, password.value)
     session.user = username.value
     void data
+    toastOk('登录成功')
     router.push('/admin')
   } catch (e) {
+    toastErr('用户名或密码不对')
     error.value = '用户名或密码不对'
   } finally {
     busy.value = false
@@ -27,6 +31,7 @@ async function submit() {
 </script>
 
 <template>
+  <ToastStack />
   <div class="page">
     <form class="card" @submit.prevent="submit">
       <p class="eyebrow">后台</p>

frontend/src/admin/PostsView.vue

@@ -1,5 +1,6 @@
 <script setup>
 import { computed, onMounted, ref, watch } from 'vue'
+import { toastOk, toastErr } from './toast'
 import { useRoute, useRouter } from 'vue-router'
 import { adminApi } from '../api'
 import { formatDateShort, relativeDate } from '../utils'
@@ -125,7 +126,7 @@ async function bulk(action) {
     await adminApi.bulkPosts([...selected.value], action)
     await load()
   } catch (e) {
-    alert(e.message || '操作失败')
+    toastErr(e.message || '操作失败')
   }
 }
 
@@ -135,7 +136,7 @@ async function remove(id, title) {
     await adminApi.deletePost(id)
     await load()
   } catch (e) {
-    alert(e.message || '删除失败')
+    toastErr(e.message || '删除失败')
   }
 }
 

frontend/src/admin/ProjectsView.vue

@@ -1,5 +1,6 @@
 <script setup>
 import { onMounted, ref } from 'vue'
+import { toastOk, toastErr } from './toast'
 import { adminApi } from '../api'
 
 const projects = ref([])
@@ -40,7 +41,7 @@ onMounted(load)
 
 async function create() {
   if (!form.value.title.trim()) {
-    alert('请填写作品名称')
+    toastErr('请填写作品名称')
     return
   }
   try {
@@ -56,7 +57,7 @@ async function create() {
     form.value = blank()
     await load()
   } catch (e) {
-    alert(e.message || '创建失败')
+    toastErr(e.message || '创建失败')
   }
 }
 
@@ -81,7 +82,7 @@ function cancelEdit() {
 
 async function saveEdit() {
   if (!draft.value.title.trim()) {
-    alert('请填写作品名称')
+    toastErr('请填写作品名称')
     return
   }
   try {
@@ -97,7 +98,7 @@ async function saveEdit() {
     editing.value = null
     await load()
   } catch (e) {
-    alert(e.message || '保存失败')
+    toastErr(e.message || '保存失败')
   }
 }
 
@@ -107,7 +108,7 @@ async function toggleStatus(p) {
     await adminApi.updateProject(p.id, { status: next })
     await load()
   } catch (e) {
-    alert(e.message || '更新失败')
+    toastErr(e.message || '更新失败')
   }
 }
 
@@ -117,7 +118,7 @@ async function remove(p) {
     await adminApi.deleteProject(p.id)
     await load()
   } catch (e) {
-    alert(e.message || '删除失败')
+    toastErr(e.message || '删除失败')
   }
 }
 </script>

frontend/src/admin/SettingsView.vue

@@ -1,5 +1,6 @@
 <script setup>
 import { computed, onMounted, ref } from 'vue'
+import { toastOk, toastErr } from './toast'
 import { adminApi } from '../api'
 import { SKIN_CONSTANTS, UI_CONSTANTS } from '../site'
 import { SECTIONS } from '../ui/sections'
@@ -35,14 +36,11 @@ function textToSocial(text) {
     .filter(Boolean)
 }
 
-// 这里只能选亮色皮肤（paper / sage / rose）。暗色端固定 ink，由访客在前台
+// 皮肤已精简：亮端固定纸感，暗端固定墨色（2026 重设计）。下面只做展示。
-// 右下角 ThemeSwitcher 切到「深色」或「自动 + 系统暗」时启用。
 const lightSkins = [
-  { id: 'paper', label: '纸感（默认）', bg: '#faf7f1', fg: '#3d7f9c' },
+  { id: 'paper', label: '纸感（默认）', bg: '#faf7f1', fg: '#3d7f9c' }
-  { id: 'sage', label: '鼠尾草', bg: '#eef0e6', fg: '#5f7b5c' },
-  { id: 'rose', label: '玫瑰', bg: '#f7eee6', fg: '#a55a4a' }
 ]
-const darkSkin = { id: 'ink', label: '墨色', bg: '#1f1d1a', fg: '#c3b58f' }
+const darkSkin = { id: 'ink', label: '墨色', bg: '#191817', fg: '#d9b97c' }
 
 // ---------- 界面与自定义（第二套 UI） ----------
 
@@ -147,6 +145,8 @@ async function load() {
       settings.value.ui_id = UI_CONSTANTS.DEFAULT
     }
     socialText.value = socialToText(settings.value.social_links)
+    settings.value.comments_enabled = !!settings.value.comments_enabled
+    settings.value.comments_review = !!settings.value.comments_review
     // 服务端保证非 null，这里再兜一层，并预建分区键，
     // 这样 v-model 绑定的文本框一开始就有值可写。
     if (!settings.value.custom_css || typeof settings.value.custom_css !== 'object') {
@@ -184,7 +184,9 @@ async function save() {
       }
     }
     savedAt.value = new Date().toLocaleTimeString('zh-CN', { hour12: false })
+    toastOk('设置已保存')
   } catch (e) {
+    toastErr('保存失败：' + (e.message || ''))
     error.value = e.message || '保存失败'
   } finally {
     saving.value = false
@@ -239,19 +241,12 @@ async function save() {
           <div class="field">
             <label>亮色皮肤</label>
             <div class="theme-swatches">
-              <div
+              <div class="sw on" :style="{ background: lightSkins[0].bg, borderColor: lightSkins[0].fg }" :title="lightSkins[0].label + '（固定）'">
-                v-for="sk in lightSkins"
+                <span :style="{ background: lightSkins[0].fg }">{{ lightSkins[0].label }}</span>
-                :key="sk.id"
-                class="sw"
-                :class="{ on: settings.light_skin_id === sk.id }"
-                :style="{ background: sk.bg, borderColor: settings.light_skin_id === sk.id ? sk.fg : 'var(--admin-line)' }"
-                @click="settings.light_skin_id = sk.id"
-              >
-                <span :style="{ background: sk.fg }">{{ sk.label }}</span>
               </div>
             </div>
             <p style="margin: 6px 0 0; font-size: 12px; color: var(--admin-muted);">
-              访客在前台选择「自动」且系统偏好浅色时使用。
+              亮端固定为纸感。访客在前台选择「自动」且系统偏好浅色时使用。
             </p>
           </div>
 
@@ -382,6 +377,17 @@ async function save() {
             <label>ICP 备案号</label>
             <input v-model="settings.icp" class="input" spellcheck="false" placeholder="如 京 ICP 备 12345678 号" />
           </div>
+          <div class="field">
+            <label>评论</label>
+            <label style="display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--admin-ink); cursor: pointer;">
+              <input v-model="settings.comments_enabled" type="checkbox" />
+              开放评论（关着时前台整个评论区不渲染）
+            </label>
+            <label style="display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--admin-ink); cursor: pointer; margin-top: 6px;">
+              <input v-model="settings.comments_review" type="checkbox" />
+              新评论需审核，通过后公开
+            </label>
+          </div>
           <div class="field">
             <label>社交链接（每行一条：名称 | 链接）</label>
             <textarea

frontend/src/admin/TagsView.vue

@@ -1,5 +1,6 @@
 <script setup>
 import { onMounted, ref } from 'vue'
+import { toastOk, toastErr } from './toast'
 import { adminApi } from '../api'
 
 const tags = ref([])
@@ -30,7 +31,7 @@ async function create() {
     newColor.value = ''
     await load()
   } catch (e) {
-    alert(e.message || '创建失败')
+    toastErr(e.message || '创建失败')
   }
 }
 
@@ -39,7 +40,7 @@ async function update(t) {
     await adminApi.updateTag(t.id, { name: t.name, color: t.color })
     await load()
   } catch (e) {
-    alert(e.message || '更新失败')
+    toastErr(e.message || '更新失败')
   }
 }
 
@@ -49,7 +50,7 @@ async function remove(t) {
     await adminApi.deleteTag(t.id)
     await load()
   } catch (e) {
-    alert(e.message || '删除失败')
+    toastErr(e.message || '删除失败')
   }
 }
 
@@ -69,7 +70,7 @@ function cancelMerge() {
 async function doMerge(fromTag) {
   const toId = Number(mergeInto.value)
   if (!toId || toId === fromTag.id) {
-    alert('选一个不同的目标标签')
+    toastErr('选一个不同的目标标签')
     return
   }
   if (!window.confirm(`把「${fromTag.name}」合并到选中的标签？此操作不可撤销。`)) return
@@ -78,7 +79,7 @@ async function doMerge(fromTag) {
     cancelMerge()
     await load()
   } catch (e) {
-    alert(e.message || '合并失败')
+    toastErr(e.message || '合并失败')
   }
 }
 </script>

frontend/src/admin/ToastStack.vue

@@ -0,0 +1,11 @@
+<script setup>
+// 后台共享 toast 的渲染层：挂在 AdminLayout（所有管理页）与 LoginView。
+// 样式在全局 styles.css（.toast-stack / .toast），与编辑器共用一份。
+import { toasts } from './toast'
+</script>
+
+<template>
+  <div class="toast-stack" aria-live="polite">
+    <div v-for="t in toasts" :key="t.id" class="toast" :class="t.type">{{ t.text }}</div>
+  </div>
+</template>

frontend/src/admin/toast.js

@@ -0,0 +1,47 @@
+import { reactive } from 'vue'
+
+// 后台共享的轻提示：所有视图的操作反馈（成功/失败/进度）从这里发，
+// ToastStack.vue 负责渲染（挂在 AdminLayout 与 LoginView）。
+// EditorView 的上传/转存也走它——原先那套局部实现已并入。
+export const toasts = reactive([])
+let seq = 0
+
+export function toast(text, type = 'info', ttl = 2600) {
+  const id = ++seq
+  toasts.push({ id, text, type })
+  setTimeout(() => {
+    const i = toasts.findIndex((t) => t.id === id)
+    if (i >= 0) toasts.splice(i, 1)
+  }, ttl)
+  return id
+}
+
+export function toastOk(text) {
+  return toast(text, 'ok', 2200)
+}
+
+export function toastErr(text) {
+  return toast(text, 'err', 4200)
+}
+
+// 更新一条已存在的 toast（上传进度用）
+export function toastUpdate(id, text, type = 'info') {
+  const t = toasts.find((x) => x.id === id)
+  if (t) {
+    t.text = text
+    t.type = type
+  }
+}
+
+// 标记成功并很快消失（进度条收尾）
+export function toastDone(id, text) {
+  toastUpdate(id, text, 'ok')
+  const idx = toasts.findIndex((t) => t.id === id)
+  if (idx >= 0) {
+    const t = toasts[idx]
+    setTimeout(() => {
+      const i = toasts.indexOf(t)
+      if (i >= 0) toasts.splice(i, 1)
+    }, 1600)
+  }
+}

frontend/src/api.js

@@ -83,11 +83,48 @@ export const adminApi = {
   deleteProject: (id) => request('/api/admin/projects/' + id, { method: 'DELETE' }),
   settings: () => request('/api/admin/settings'),
   saveSettings: (body) => request('/api/admin/settings', { method: 'PUT', body }),
+  // ---------- 评论管理 ----------
+  comments: (params = {}) => request('/api/admin/comments?' + new URLSearchParams(params)),
+  approveComment: (id) =>
+    request('/api/admin/comments/' + id, { method: 'PUT', body: { status: 'visible' } }),
+  deleteComment: (id) => request('/api/admin/comments/' + id, { method: 'DELETE' }),
+  readers: (params = {}) => request('/api/admin/readers?' + new URLSearchParams(params)),
+  setReaderBanned: (id, banned) =>
+    request('/api/admin/readers/' + id + '/ban', { method: 'POST', body: { banned } }),
   // ---------- 文件上传 ----------
   files: (params = {}) => request('/api/admin/files?' + new URLSearchParams(params)),
   deleteFile: (id) => request('/api/admin/files/' + id, { method: 'DELETE' }),
   // 上传走 FormData：request() 是 JSON helper，这里单独 fetch。
   // 401 同样广播 one:unauthorized，错误消息从 JSON body 里取（与 request 一致）。
+  // 单文件上传（XHR）：fetch 拿不到上传进度，编辑器的进度提示走这里
+  uploadFile: (file, onProgress) =>
+    new Promise((resolve, reject) => {
+      const xhr = new XMLHttpRequest()
+      xhr.open('POST', base + '/api/admin/files')
+      xhr.withCredentials = true
+      xhr.upload.onprogress = (e) => {
+        if (e.lengthComputable && onProgress) onProgress(e.loaded / e.total)
+      }
+      xhr.onload = () => {
+        if (xhr.status === 401) {
+          window.dispatchEvent(new CustomEvent('one:unauthorized'))
+          reject(new Error('未登录或登录已过期'))
+          return
+        }
+        let data = {}
+        try {
+          data = JSON.parse(xhr.responseText)
+        } catch {}
+        if (xhr.status >= 200 && xhr.status < 300) resolve(data)
+        else reject(new Error(data.error || `上传失败（${xhr.status}）`))
+      }
+      xhr.onerror = () => reject(new Error('网络错误，上传中止'))
+      const fd = new FormData()
+      fd.append('file', file)
+      xhr.send(fd)
+    }),
+  // 外链转存：把正文里的外链图片抓回自己的存储，返回 { files, errors }
+  importFiles: (urls) => request('/api/admin/files/import', { method: 'POST', body: { urls } }),
   uploadFiles: async (formData) => {
     const res = await fetch(base + '/api/admin/files', {
       method: 'POST',

frontend/src/components/ImgLightbox.vue

@@ -0,0 +1,211 @@
+<script setup>
+import { onBeforeUnmount, watch } from 'vue'
+import { lightboxState as st, closeLightbox, stepLightbox } from '../lightbox'
+
+// 图片预览层（手机重做版）：App.vue 全局挂一次。
+//
+// 手机上出过两次事故，这次的实现原则：
+// 1. 不碰 body 的 overflow——之前用 inline overflow 锁背景，把样式表的
+//    overflow-x: clip 覆盖成 hidden，横向从「裁剪」变「可滚动容器」，
+//    整页被拖宽。现在滚动封锁靠遮罩自己的 @wheel/@touchmove.prevent：
+//    事件不落到页面里，背景自然滚不动，滚动位置也天然保留。
+// 2. 图片尺寸全部用百分比（max-width/height: 100%），不引入 vw/vh/dvh——
+//    这些单位在全面屏 URL 栏收展时各有各的坑，遮罩本身就是视口大小。
+// 3. 手势全归遮罩：touch-action: none + touchend 位移判滑动翻页，
+//    双击缩放/长按菜单/下拉刷新这些浏览器手势都不会来捣乱。
+// 4. 桌面能力不变：Esc / 方向键 / 点空白关闭 / 悬停箭头。
+
+function onKey(e) {
+  if (e.key === 'Escape') closeLightbox()
+  if (e.key === 'ArrowLeft') stepLightbox(-1)
+  if (e.key === 'ArrowRight') stepLightbox(1)
+}
+
+// 吸顶栏带 backdrop-filter，真机上其合成层会盖在遮罩之上
+// （z-index 更高也拦不住）——开预览时整个藏掉
+watch(
+  () => st.open,
+  (v) => {
+    if (v) window.addEventListener('keydown', onKey)
+    else window.removeEventListener('keydown', onKey)
+    document.body.classList.toggle('lb-open', v)
+  }
+)
+onBeforeUnmount(() => {
+  window.removeEventListener('keydown', onKey)
+  document.body.classList.remove('lb-open')
+})
+
+// 滑动翻页：横向位移超 44px 且明显大于纵向才算一次滑动
+let touchX = 0
+let touchY = 0
+function onTouchStart(e) {
+  touchX = e.touches[0].clientX
+  touchY = e.touches[0].clientY
+}
+function onTouchEnd(e) {
+  if (st.list.length < 2) return
+  const dx = e.changedTouches[0].clientX - touchX
+  const dy = e.changedTouches[0].clientY - touchY
+  if (Math.abs(dx) > 44 && Math.abs(dx) > Math.abs(dy) * 1.4) {
+    stepLightbox(dx < 0 ? 1 : -1)
+  }
+}
+</script>
+
+<template>
+  <Teleport to="body">
+    <Transition name="lb" :duration="220">
+      <div
+        v-if="st.open"
+        class="lb-overlay"
+        @click="closeLightbox"
+        @touchstart.passive="onTouchStart"
+        @touchend.passive="onTouchEnd"
+        @wheel.prevent
+        @touchmove.prevent
+      >
+        <img class="lb-img" :src="st.list[st.index]" alt="" @click.stop />
+        <button v-if="st.list.length > 1" class="lb-nav prev" type="button" aria-label="上一张" @click.stop="stepLightbox(-1)">‹</button>
+        <button v-if="st.list.length > 1" class="lb-nav next" type="button" aria-label="下一张" @click.stop="stepLightbox(1)">›</button>
+        <button class="lb-close" type="button" aria-label="关闭预览" @click="closeLightbox">×</button>
+        <span v-if="st.list.length > 1" class="lb-count">{{ st.index + 1 }} / {{ st.list.length }}</span>
+      </div>
+    </Transition>
+  </Teleport>
+</template>
+
+<style scoped>
+.lb-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 130;
+  background: rgba(12, 11, 10, 0.92);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  /* 遮罩全权处理手势：杜绝双击缩放/长按菜单/下拉刷新来添乱 */
+  touch-action: none;
+}
+
+/* 百分比尺寸：遮罩即视口，图片永远不会超出屏幕半像素 */
+.lb-img {
+  max-width: 100%;
+  max-height: 100%;
+  object-fit: contain;
+  border-radius: 6px;
+  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.6);
+  user-select: none;
+  -webkit-user-drag: none;
+}
+
+.lb-nav {
+  position: absolute;
+  top: 50%;
+  transform: translateY(-50%);
+  width: 44px;
+  height: 44px;
+  border: 1px solid rgba(255, 255, 255, 0.25);
+  border-radius: 50%;
+  background: rgba(255, 255, 255, 0.08);
+  color: rgba(255, 255, 255, 0.85);
+  font-size: 26px;
+  line-height: 1;
+  cursor: pointer;
+  display: grid;
+  place-items: center;
+  padding-bottom: 4px;
+  transition: background-color 0.15s, color 0.15s;
+}
+
+.lb-nav:hover {
+  background: rgba(255, 255, 255, 0.18);
+  color: #fff;
+}
+
+.lb-nav.prev {
+  left: 22px;
+}
+
+.lb-nav.next {
+  right: 22px;
+}
+
+.lb-close {
+  position: absolute;
+  top: 18px;
+  right: 22px;
+  width: 38px;
+  height: 38px;
+  border: 1px solid rgba(255, 255, 255, 0.25);
+  border-radius: 50%;
+  background: rgba(255, 255, 255, 0.08);
+  color: rgba(255, 255, 255, 0.85);
+  font-size: 17px;
+  line-height: 1;
+  cursor: pointer;
+  transition: background-color 0.15s, color 0.15s;
+}
+
+.lb-close:hover {
+  background: rgba(255, 255, 255, 0.18);
+  color: #fff;
+}
+
+.lb-count {
+  position: absolute;
+  bottom: 18px;
+  left: 50%;
+  transform: translateX(-50%);
+  color: rgba(255, 255, 255, 0.7);
+  font-size: 12.5px;
+  letter-spacing: 0.08em;
+  font-variant-numeric: tabular-nums;
+}
+
+/* 手机：滑动翻页为主，箭头贴边缩小；位置全走安全区 */
+@media (pointer: coarse) {
+  .lb-img {
+    border-radius: 0;
+  }
+
+  .lb-nav {
+    width: 40px;
+    height: 40px;
+    font-size: 22px;
+    background: rgba(255, 255, 255, 0.12);
+  }
+
+  .lb-nav.prev {
+    left: calc(6px + env(safe-area-inset-left));
+  }
+
+  .lb-nav.next {
+    right: calc(6px + env(safe-area-inset-right));
+  }
+
+  .lb-close {
+    top: calc(10px + env(safe-area-inset-top));
+    right: calc(10px + env(safe-area-inset-right));
+    width: 42px;
+    height: 42px;
+  }
+
+  .lb-count {
+    bottom: calc(14px + env(safe-area-inset-bottom));
+  }
+}
+
+.lb-enter-active {
+  transition: opacity 0.2s ease;
+}
+
+.lb-leave-active {
+  transition: opacity 0.18s ease;
+}
+
+.lb-enter-from,
+.lb-leave-to {
+  opacity: 0;
+}
+</style>

frontend/src/components/LinkCard.vue

@@ -0,0 +1,127 @@
+<script setup>
+import { ref } from 'vue'
+
+// 链接预览卡片：正文里第一个外链在发布时由后端抓好（posts.link_card），
+// 这里只负责展示。没有可展示内容时父组件根本不会渲染它。
+//
+// 用 div[role=link] 而不是 <a>：vivid 的整条短文包在 RouterLink（一个 <a>）里，
+// 再嵌一个 <a> 是非法 HTML。也因此点击必须 preventDefault——
+// 只 stop 的话祖先 <a> 的默认激活行为照样会把点击变成跳转。
+const props = defineProps({
+  card: { type: Object, required: true }
+})
+
+const imgBroken = ref(false)
+
+function open() {
+  window.open(props.card.url, '_blank', 'noopener,noreferrer')
+}
+</script>
+
+<template>
+  <div
+    class="link-card"
+    role="link"
+    tabindex="0"
+    :title="card.url"
+    @click.prevent.stop="open"
+    @keydown.enter.prevent="open"
+  >
+    <div class="lc-text">
+      <span v-if="card.site" class="lc-site">{{ card.site }}</span>
+      <span v-if="card.title" class="lc-title">{{ card.title }}</span>
+      <span v-if="card.desc" class="lc-desc">{{ card.desc }}</span>
+    </div>
+    <img
+      v-if="card.image && !imgBroken"
+      class="lc-img"
+      :src="card.image"
+      alt=""
+      loading="lazy"
+      decoding="async"
+      referrerpolicy="no-referrer"
+      @error="imgBroken = true"
+    />
+  </div>
+</template>
+
+<style scoped>
+/* 颜色一律写成「vivid 变量优先、classic 变量兜底」：同一份组件在两套 UI 里
+   各归各的调色板，不必再维护第二份样式表。 */
+.link-card {
+  display: flex;
+  align-items: stretch;
+  gap: 12px;
+  margin-top: 10px;
+  padding: 10px 12px;
+  border: 1px solid var(--v-line, var(--line-soft));
+  border-radius: var(--v-radius-sm, 10px);
+  background: var(--v-surface, var(--card));
+  cursor: pointer;
+  transition: border-color 0.15s ease, background 0.15s ease;
+}
+
+.link-card:hover {
+  border-color: var(--v-line-strong, var(--accent-line));
+}
+
+.link-card:focus-visible {
+  outline: 2px solid var(--v-accent, var(--accent));
+  outline-offset: 2px;
+}
+
+.lc-text {
+  display: flex;
+  flex-direction: column;
+  gap: 3px;
+  min-width: 0;
+  flex: 1;
+}
+
+.lc-site {
+  font-size: 11.5px;
+  letter-spacing: 0.04em;
+  text-transform: lowercase;
+  color: var(--v-muted, var(--faint));
+  /* 主机名是最典型的不可断行长 token（子域一长串），不给它 anywhere
+     就会把卡片左列顶宽、整行溢出 */
+  overflow-wrap: anywhere;
+}
+
+.lc-title {
+  font-size: 15px;
+  line-height: 1.45;
+  font-weight: 600;
+  color: var(--v-text, var(--ink));
+  display: -webkit-box;
+  -webkit-line-clamp: 2;
+  -webkit-box-orient: vertical;
+  overflow: hidden;
+}
+
+.lc-desc {
+  font-size: 13px;
+  line-height: 1.6;
+  color: var(--v-text-soft, var(--muted));
+  display: -webkit-box;
+  -webkit-line-clamp: 2;
+  -webkit-box-orient: vertical;
+  overflow: hidden;
+}
+
+.lc-img {
+  flex: 0 0 auto;
+  width: 84px;
+  height: 84px;
+  object-fit: cover;
+  border-radius: var(--v-radius-sm, 8px);
+  background: var(--v-surface-2, var(--paper-sunken));
+}
+
+@media (max-width: 520px) {
+  .lc-img {
+    width: 64px;
+    height: 64px;
+  }
+}
+</style>

frontend/src/components/PostCard.vue

@@ -1,7 +1,12 @@
 <script setup>
 import { computed } from 'vue'
+import { useRouter } from 'vue-router'
 import { site } from '../site'
-import { relativeDate, stripTags, minutesLabel, sanitizeHtml } from '../utils'
+import { openLightbox } from '../lightbox'
+import { relativeDate, stripTags, minutesLabel, sanitizeHtml, thumbURL, thumbifyHtml } from '../utils'
+import LinkCard from './LinkCard.vue'
+
+const router = useRouter()
 
 const props = defineProps({
   post: { type: Object, required: true }
@@ -9,10 +14,18 @@ const props = defineProps({
 
 const isShort = computed(() => props.post.kind === 'short')
 
-// 时间线里短文不铺全文，超过 5 行折叠；长文只显示摘要
+// 整卡可点进详情（Twitter 式）；标签 / 配图自己会停冒泡不误跳。
+// 用户在选中文字时不跳转（复制内容是第一意图）。
+function openPost() {
+  if (window.getSelection()?.toString()) return
+  router.push(`/post/${props.post.slug}`)
+}
+
+// 时间线里短文不铺全文，超过 5 行折叠；长文只显示摘要。
+// 正文里的 <img> 换缩略图并补懒加载（详情仍是原图）。
 const body = computed(() => {
   if (!isShort.value) return props.post.summary || stripTags(props.post.content_html || '')
-  return sanitizeHtml(props.post.content_html)
+  return sanitizeHtml(thumbifyHtml(props.post.content_html))
 })
 
 // 长文没写摘要时，从正文里截一段纯文本
@@ -22,10 +35,13 @@ const summaryText = computed(() => {
 })
 
 const initial = computed(() => (site.author_name || 'O').trim().slice(0, 1).toUpperCase())
+
+// 配图缩略图宽度：单图全宽格取宽一些，多图小格 480 足够（2x 屏也清晰）
+const gridW = computed(() => (props.post.images && props.post.images.length === 1 ? 720 : 480))
 </script>
 
 <template>
-  <article class="row-feed" :class="{ short: isShort }">
+  <article class="row-feed" :class="{ short: isShort }" @click="openPost">
     <div class="avatar" aria-hidden="true">{{ initial }}</div>
 
     <div class="body">
@@ -42,13 +58,38 @@ const initial = computed(() => (site.author_name || 'O').trim().slice(0, 1).toUp
         <h2 class="title">{{ post.title || '无题' }}</h2>
       </RouterLink>
 
-      <!-- 长文：摘要；短文：正文直接铺开 -->
+      <!-- 长文：摘要 + 封面媒体位；短文：正文直接铺开 -->
       <div v-if="isShort" class="prose short-body" v-html="body"></div>
-      <div v-else class="summary">{{ summaryText }}</div>
+      <template v-else>
+        <div class="summary">{{ summaryText }}</div>
+        <div v-if="post.cover_url" class="imgs cover">
+          <img :src="thumbURL(post.cover_url, 640)" alt="" loading="lazy" decoding="async" />
+        </div>
+      </template>
+
+      <!-- 短文配图：Twitter 式网格（1 全宽 / 2 并排 / 3 左大右二 / 4 四宫格）；点图开预览 -->
+      <div
+        v-if="isShort && post.images && post.images.length"
+        class="imgs"
+        :class="'n' + Math.min(post.images.length, 4)"
+      >
+        <img
+          v-for="(u, i) in post.images.slice(0, 4)"
+          :key="i"
+          :src="thumbURL(u, gridW)"
+          alt=""
+          loading="lazy"
+          decoding="async"
+          @click.stop="openLightbox(post.images, i)"
+        />
+      </div>
+
+      <!-- 外链预览卡片：正文里第一个链接，发布时后端已抓好 -->
+      <LinkCard v-if="isShort && post.link_card" :card="post.link_card" />
 
       <div class="meta">
-        <RouterLink :to="`/post/${post.slug}`" class="read">
+        <RouterLink :to="`/post/${post.slug}`" class="read" :title="isShort ? '查看' : '阅读全文'">
-          {{ isShort ? '查看' : '继续阅读' }} →
+          <time :datetime="post.published_at">{{ relativeDate(post.published_at) }}</time>
         </RouterLink>
         <span v-if="!isShort" class="mins">{{ minutesLabel(post) }}</span>
         <span v-if="post.tags && post.tags.length" class="tags">
@@ -57,6 +98,7 @@ const initial = computed(() => (site.author_name || 'O').trim().slice(0, 1).toUp
             :key="t"
             :to="`/tag/${encodeURIComponent(t)}`"
             class="tag-chip"
+            @click.stop
           >
             {{ t }}
           </RouterLink>
@@ -76,6 +118,7 @@ const initial = computed(() => (site.author_name || 'O').trim().slice(0, 1).toUp
   padding: 14px 30px;
   margin: 0 -16px;
   border-bottom: 1px solid var(--line-soft);
+  cursor: pointer;
   transition: background 0.15s ease;
 }
 
@@ -154,6 +197,57 @@ const initial = computed(() => (site.author_name || 'O').trim().slice(0, 1).toUp
   margin: 0;
 }
 
+/* 短文配图：Twitter 式网格。1 张全宽（限高裁切），2/4 等分，3 张左大右二 */
+.imgs {
+  display: grid;
+  gap: 3px;
+  margin-top: 10px;
+  border-radius: 12px;
+  overflow: hidden;
+}
+
+.imgs img {
+  display: block;
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+  cursor: zoom-in;
+}
+
+.imgs.n1 img {
+  max-height: 440px;
+}
+
+.imgs.n2,
+.imgs.n4 {
+  grid-template-columns: 1fr 1fr;
+}
+
+.imgs.n3 {
+  grid-template-columns: 1fr 1fr;
+}
+
+.imgs.n2 img,
+.imgs.n4 img {
+  aspect-ratio: 1;
+}
+
+.imgs.n3 img {
+  aspect-ratio: 1;
+}
+
+.imgs.n3 img:first-child {
+  grid-row: span 2;
+  aspect-ratio: auto;
+  height: 100%;
+}
+
+/* 长文封面：与短文配图同款圆角媒体位，但点击语义是进文章而非预览 */
+.imgs.cover img {
+  max-height: 340px;
+  cursor: pointer;
+}
+
 .meta {
   display: flex;
   align-items: center;
@@ -164,7 +258,13 @@ const initial = computed(() => (site.author_name || 'O').trim().slice(0, 1).toUp
   color: var(--faint);
 }
 
+/* 时间戳即入口（整卡可点后的键盘 / 视觉兜底）：平时弱化，hover 亮起 */
 .read {
+  color: var(--faint);
+  transition: color 0.15s ease;
+}
+
+.read:hover {
   color: var(--accent);
 }
 
@@ -174,11 +274,19 @@ const initial = computed(() => (site.author_name || 'O').trim().slice(0, 1).toUp
   gap: 6px;
 }
 
+/* 出血必须跟 .shell 的页边距同步：styles.css 里 .shell 在 640px 断点从 20px
+   收到 12px，这里就得同时从 -16px 收到 -12px。之前写的是 520px，于是
+   521~640 这段（窄窗口 / 横屏手机）出血比父容器内边距多 4px，整页横向溢出。 */
+@media (max-width: 640px) {
+  .row-feed {
+    margin: 0 -12px;
+  }
+}
+
 @media (max-width: 520px) {
   .row-feed {
     grid-template-columns: 34px minmax(0, 1fr);
     padding: 16px 12px;
-    margin: 0 -12px;
   }
 
   .avatar {

frontend/src/components/QuickShort.vue

@@ -23,8 +23,40 @@ const publishing = ref(false)
 const error = ref('')
 const sheetOpen = ref(false)
 
+// 配图：选图即上传（走 /api/admin/files），最多 4 张，发布时随帖子带上
+const images = ref([]) // [{ url, name }]
+const MAX_IMAGES = 4
+const imgInput = ref(null)
+const imgUploading = ref(false)
+
+function pickImages() {
+  imgInput.value?.click()
+}
+async function onImagesPick(e) {
+  const files = [...(e.target.files || [])].slice(0, MAX_IMAGES - images.value.length)
+  e.target.value = '' // 允许分批续选
+  if (!files.length) return
+  imgUploading.value = true
+  error.value = ''
+  try {
+    const fd = new FormData()
+    for (const f of files) fd.append('file', f)
+    const data = await adminApi.uploadFiles(fd)
+    for (const f of data) images.value.push({ url: f.url, name: f.name })
+  } catch (e2) {
+    error.value = e2.message || '图片上传失败'
+  } finally {
+    imgUploading.value = false
+  }
+}
+function removeImage(i) {
+  images.value.splice(i, 1)
+}
+
 const initial = computed(() => (userName.value || 'O').trim().slice(0, 1).toUpperCase())
-const canPost = computed(() => draft.value.trim().length > 0 && !publishing.value)
+const canPost = computed(
+  () => (draft.value.trim().length > 0 || images.value.length > 0) && !publishing.value
+)
 
 onMounted(async () => {
   try {
@@ -53,9 +85,11 @@ async function publish() {
     await adminApi.createPost({
       kind: 'short',
       content_md: draft.value.trim(),
-      status: 'published'
+      status: 'published',
+      images: images.value.map((i) => i.url)
     })
     draft.value = ''
+    images.value = []
     sheetOpen.value = false
     emit('published')
   } catch (e) {
@@ -79,13 +113,30 @@ async function publish() {
         <span class="qs-av">{{ initial }}</span>
         <div class="qs-body">
           <textarea v-model="draft" class="qs-input" rows="2" placeholder="记点短的…" @keydown="onKey" />
+          <div v-if="images.length" class="qs-thumbs">
+            <div v-for="(im, i) in images" :key="im.url" class="qs-thumb">
+              <img :src="im.url" alt="">
+              <button type="button" class="x" :aria-label="`移除 ${im.name}`" @click="removeImage(i)">×</button>
+            </div>
+          </div>
           <div class="qs-acts">
+            <button
+              type="button"
+              class="qs-img-btn"
+              :disabled="images.length >= MAX_IMAGES || imgUploading"
+              title="添加图片（最多 4 张）"
+              aria-label="添加图片"
+              @click="pickImages"
+            >
+              <svg viewBox="0 0 24 24" aria-hidden="true"><path d="M21 19V5c0-1.1-.9-2-2-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2zM8.5 13.5l2.5 3.01L14.5 12l4.5 6H5l3.5-4.5z"/></svg>
+            </button>
             <span v-if="error" class="qs-err">{{ error }}</span>
             <span v-else class="qs-tip">Ctrl / ⌘ + Enter 发布</span>
             <button type="button" class="qs-send" :disabled="!canPost" @click="publish">
               {{ publishing ? '发布中…' : '发布' }}
             </button>
           </div>
+          <input ref="imgInput" type="file" accept="image/*" multiple hidden @change="onImagesPick" />
         </div>
       </div>
     </div>
@@ -102,13 +153,30 @@ async function publish() {
             <button type="button" class="qs-close" aria-label="关闭" @click="sheetOpen = false">✕</button>
           </div>
           <textarea v-model="draft" class="qs-input" rows="4" placeholder="记点短的…" @keydown="onKey" />
+          <div v-if="images.length" class="qs-thumbs">
+            <div v-for="(im, i) in images" :key="im.url" class="qs-thumb">
+              <img :src="im.url" alt="">
+              <button type="button" class="x" :aria-label="`移除 ${im.name}`" @click="removeImage(i)">×</button>
+            </div>
+          </div>
           <div class="qs-acts">
+            <button
+              type="button"
+              class="qs-img-btn"
+              :disabled="images.length >= MAX_IMAGES || imgUploading"
+              title="添加图片（最多 4 张）"
+              aria-label="添加图片"
+              @click="pickImages"
+            >
+              <svg viewBox="0 0 24 24" aria-hidden="true"><path d="M21 19V5c0-1.1-.9-2-2-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2zM8.5 13.5l2.5 3.01L14.5 12l4.5 6H5l3.5-4.5z"/></svg>
+            </button>
             <span v-if="error" class="qs-err">{{ error }}</span>
             <span v-else class="qs-tip">Ctrl / ⌘ + Enter 发布</span>
             <button type="button" class="qs-send" :disabled="!canPost" @click="publish">
               {{ publishing ? '发布中…' : '发布' }}
             </button>
           </div>
+          <input ref="imgInput" type="file" accept="image/*" multiple hidden @change="onImagesPick" />
         </div>
       </div>
     </Transition>
@@ -201,6 +269,76 @@ async function publish() {
   cursor: default;
 }
 
+/* 配图：缩略图条 + 添加按钮（最多 4 张，Twitter 同款） */
+.qs-thumbs {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+}
+
+.qs-thumb {
+  position: relative;
+  width: 64px;
+  height: 64px;
+  border-radius: 8px;
+  overflow: hidden;
+  border: 1px solid var(--line);
+}
+
+.qs-thumb img {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+  display: block;
+}
+
+.qs-thumb .x {
+  position: absolute;
+  top: 2px;
+  right: 2px;
+  width: 16px;
+  height: 16px;
+  border: 0;
+  border-radius: 50%;
+  background: rgba(0, 0, 0, 0.55);
+  color: #fff;
+  font-size: 11px;
+  line-height: 1;
+  cursor: pointer;
+  display: grid;
+  place-items: center;
+}
+
+.qs-img-btn {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 28px;
+  height: 28px;
+  border: 0;
+  border-radius: 6px;
+  background: none;
+  color: var(--muted);
+  cursor: pointer;
+  transition: color 0.15s, background-color 0.15s;
+}
+
+.qs-img-btn:hover:not(:disabled) {
+  color: var(--accent);
+  background: var(--accent-soft);
+}
+
+.qs-img-btn:disabled {
+  opacity: 0.4;
+  cursor: default;
+}
+
+.qs-img-btn svg {
+  width: 18px;
+  height: 18px;
+  fill: currentColor;
+}
+
 /* 手机：FAB 常驻右下，点开上拉 sheet */
 .qs-fab {
   display: none;

frontend/src/components/RightRail.vue

@@ -1,13 +1,42 @@
 <script setup>
-import { computed, onMounted, ref } from 'vue'
+import { computed, nextTick, onBeforeUnmount, onMounted, ref, watch } from 'vue'
 import { publicApi } from '../api'
 import { site } from '../site'
 import { socialIcon } from '../socialIcons'
-import { relativeDate } from '../utils'
+import { relativeDate, stripTags, thumbURL } from '../utils'
 
 // vivid 是单栏布局，右栏整体不渲染（省掉 latest/tags 两次请求）。
 const isVivid = computed(() => site.ui_id === 'vivid')
 
+// 文章页目录（PostView 传入 headings；空数组时不渲染这张卡）。
+// 高亮跟随滚动：视口上方最近的那个标题算「当前」。
+const props = defineProps({
+  toc: { type: Array, default: () => [] }
+})
+const activeId = ref('')
+let tocObserver = null
+
+function watchToc() {
+  if (tocObserver) tocObserver.disconnect()
+  if (!props.toc.length) return
+  tocObserver = new IntersectionObserver(
+    (entries) => {
+      for (const e of entries) {
+        if (e.isIntersecting) activeId.value = e.target.id
+      }
+    },
+    { rootMargin: '0px 0px -65% 0px' }
+  )
+  nextTick(() => {
+    for (const t of props.toc) {
+      const el = document.getElementById(t.id)
+      if (el) tocObserver.observe(el)
+    }
+  })
+}
+watch(() => props.toc, watchToc, { deep: false })
+onBeforeUnmount(() => tocObserver && tocObserver.disconnect())
+
 // 项目源码仓库是固定入口（本站 git remote），不来自后台配置 —— 和版权一样
 // 固定渲染在自己的那排；后台填的社交账号单独一排，URL 撞车的去重。
 const PROJECT_REPO = 'https://git.gopher.ink/mirrors2/ONE'
@@ -27,6 +56,26 @@ const links = [
 const latest = ref([])
 const tags = ref([])
 
+// 短文没有标题，侧栏拿正文开头当标识（flomo/Twitter 的做法），
+// 纯图片短文显示占位；有配图时右侧带一张小缩略图。
+const EXCERPT_LEN = 22
+function excerpt(p) {
+  if (p.kind !== 'short') return p.title || '无题'
+  // 先剥 <a>：贴链接的短文开头是 URL 本身，摘出来没有信息量；
+  // 剥完没字了（纯链接贴）就退到链接卡片的标题
+  const noLinks = (p.content_html || '').replace(/<a\b[^>]*>[\s\S]*?<\/a>/gi, ' ')
+  const text = stripTags(noLinks).replace(/\s+/g, ' ').trim()
+  if (text) return text.length > EXCERPT_LEN ? text.slice(0, EXCERPT_LEN) + '…' : text
+  if (p.link_card && p.link_card.title) {
+    const t = p.link_card.title
+    return t.length > EXCERPT_LEN ? t.slice(0, EXCERPT_LEN) + '…' : t
+  }
+  return p.images && p.images.length ? '📷 图片' : '短文'
+}
+function thumbOf(p) {
+  return p.kind === 'short' && p.images && p.images.length ? thumbURL(p.images[0], 160) : ''
+}
+
 onMounted(async () => {
   if (isVivid.value) return
   try {
@@ -42,6 +91,15 @@ onMounted(async () => {
 
 <template>
   <aside v-if="!isVivid" class="rail-right">
+    <section v-if="toc.length" class="card toc-card">
+      <p class="eyebrow">目录</p>
+      <ul class="toc-list">
+        <li v-for="t in toc" :key="t.id" :class="{ h3: t.level >= 3, on: activeId === t.id }">
+          <a :href="'#' + t.id" :class="{ on: activeId === t.id }">{{ t.text }}</a>
+        </li>
+      </ul>
+    </section>
+
     <section class="card">
       <p class="eyebrow">关于这里</p>
       <p class="bio">{{ site.author_bio || site.site_desc }}</p>
@@ -52,12 +110,22 @@ onMounted(async () => {
       <p class="eyebrow">最近更新</p>
       <ul class="list">
         <li v-for="p in latest" :key="p.id">
-          <RouterLink :to="`/post/${p.slug}`" class="row">
+          <RouterLink :to="`/post/${p.slug}`" class="row" :class="{ withThumb: thumbOf(p) }">
-            <span class="title">
+            <span class="row-main">
-              {{ p.kind === 'short' ? '短文' : p.title || '无题' }}
+              <span class="title">
-              <span v-if="p.kind === 'short'" class="badge">短</span>
+                {{ excerpt(p) }}
+                <span v-if="p.kind === 'short'" class="badge">短</span>
+              </span>
+              <span class="date">{{ relativeDate(p.published_at) }}</span>
             </span>
-            <span class="date">{{ relativeDate(p.published_at) }}</span>
+            <img
+              v-if="thumbOf(p)"
+              class="thumb"
+              :src="thumbOf(p)"
+              alt=""
+              loading="lazy"
+              decoding="async"
+            />
           </RouterLink>
         </li>
       </ul>
@@ -78,15 +146,6 @@ onMounted(async () => {
          已删：右栏在窄屏会堆到信息流下方，卡片之后正好接页脚小字，
          所有宽度都不缺位。 -->
     <footer class="rail-foot">
-      <nav class="foot-links" aria-label="页脚导航">
-        <template v-for="(l, i) in links" :key="l.to">
-          <span v-if="i" class="dot">·</span>
-          <RouterLink :to="l.to">{{ l.label }}</RouterLink>
-        </template>
-        <span class="dot">·</span>
-        <a href="/rss.xml">RSS</a>
-      </nav>
-      <!-- 后台填的社交账号：单独一排 -->
       <div v-if="social.length" class="social-row">
         <a
           v-for="s in social"
@@ -102,6 +161,14 @@ onMounted(async () => {
           <span v-else>{{ s.label }}</span>
         </a>
       </div>
+      <nav class="foot-links" aria-label="页脚导航">
+        <template v-for="(l, i) in links" :key="l.to">
+          <span v-if="i" class="dot">·</span>
+          <RouterLink :to="l.to">{{ l.label }}</RouterLink>
+        </template>
+        <span class="dot">·</span>
+        <a href="/rss.xml">RSS</a>
+      </nav>
       <!-- 项目信息：固定的源码图标 + 版权，永远在 -->
       <div class="foot-meta">
         <a class="social-icon" :href="PROJECT_REPO" title="项目源码" aria-label="项目源码" target="_blank" rel="noopener">
@@ -145,6 +212,24 @@ onMounted(async () => {
   color: var(--accent);
 }
 
+/* 文章目录：当前小节高亮，层级缩进 */
+.toc-list {
+  list-style: none;
+  margin: 8px 0 0;
+  padding: 0;
+  font-size: 13px;
+  line-height: 1.6;
+}
+.toc-list li {margin: 2px 0;
+  border-left: 2px solid transparent;
+  padding-left: 8px;}
+.toc-list li.h3 {padding-left: 20px;
+  font-size: 12.5px;}
+.toc-list li.on {border-left-color: var(--accent);}
+.toc-list a {color: var(--muted);
+  text-decoration: none;}
+.toc-list li.on a, .toc-list a:hover {color: var(--accent);}
+
 .list {
   list-style: none;
   margin: 8px 0 0;
@@ -152,7 +237,9 @@ onMounted(async () => {
 }
 
 .row {
-  display: block;
+  display: flex;
+  align-items: center;
+  gap: 10px;
   padding: 7px 0;
   border-bottom: 1px dashed var(--line-soft);
 }
@@ -161,10 +248,27 @@ onMounted(async () => {
   border-bottom: 0;
 }
 
+/* 文字列吃满剩余宽度，缩略图固定在右 */
+.row-main {
+  flex: 1;
+  min-width: 0;
+}
+
 .title {
   display: block;
   font-size: 14px;
   line-height: 1.7;
+  overflow-wrap: anywhere;
+}
+
+.thumb {
+  flex: 0 0 auto;
+  width: 34px;
+  height: 34px;
+  object-fit: cover;
+  border-radius: 6px;
+  background: var(--card);
+  border: 1px solid var(--line-soft);
 }
 
 .badge {
@@ -219,12 +323,13 @@ onMounted(async () => {
   opacity: 0.6;
 }
 
-/* 图标 + 版权同排：源码等入口是单色小图标，hover 才亮成强调色 */
+/* 社交按钮：页脚第一排居中 */
 .social-row {
   display: flex;
   flex-wrap: wrap;
-  gap: 4px;
+  justify-content: center;
-  margin-top: 2px;
+  gap: 6px;
+  margin-bottom: 10px;
 }
 
 .foot-meta {

frontend/src/components/comments/CommentItem.vue

@@ -25,14 +25,14 @@ const props = defineProps({
 const s = props.api.s
 const EDIT_WINDOW_MS = 10 * 60 * 1000
 
-const name = computed(() => (props.c.author && props.c.author.name) || '已注销用户')
+const name = computed(() => (props.c.user && props.c.user.name) || '已注销用户')
 const relativeTime = computed(() => relativeDate(props.c.created_at))
-const isOwner = computed(() => !!(props.c.author && props.c.author.is_owner))
+const isOwner = computed(() => !!(props.c.user && props.c.user.provider === 'admin'))
-const isMine = computed(() => !!(reader.user && props.c.author && reader.user.id === props.c.author.id))
+const isMine = computed(() => !!(reader.user && props.c.user && reader.user.id === props.c.user.id))
 
 // 外链：优先作者自填的 url，其次 GitHub 主页
 const authorHref = computed(() => {
-  const a = props.c.author
+  const a = props.c.user
   if (!a) return ''
   if (a.url) return a.url
   if (a.provider === 'github' && a.handle) return `https://github.com/${a.handle}`
@@ -41,12 +41,11 @@ const authorHref = computed(() => {
 
 const canEdit = computed(() => {
   if (props.c.is_deleted) return false
-  if (isOwner.value) return true
   if (!isMine.value) return false
   const t = new Date(props.c.created_at).getTime()
   return Number.isFinite(t) && Date.now() - t <= EDIT_WINDOW_MS
 })
-const canDelete = computed(() => !props.c.is_deleted && (isMine.value || isOwner.value))
+const canDelete = computed(() => !props.c.is_deleted && isMine.value)
 
 const replying = computed(() => s.replyTo && s.replyTo.id === props.c.id)
 const editing = computed(() => s.editing && s.editing.id === props.c.id)
@@ -118,7 +117,7 @@ const atInline = computed(
 function replyNameOf(r) {
   if (!r.parent_id || r.parent_id === props.c.id) return ''
   const t = (props.c.replies || []).find((x) => x.id === r.parent_id)
-  return t ? (t.author && t.author.name) || '' : ''
+  return t ? (t.user && t.user.name) || '' : ''
 }
 </script>
 
@@ -126,15 +125,15 @@ function replyNameOf(r) {
   <li class="cm-item" :class="{ 'is-deleted': c.is_deleted, 'is-reply': depth > 0 }">
     <div class="cm-av" :class="{ 'is-owner': isOwner }">
       <img
-        v-if="c.author && c.author.avatar_url"
+        v-if="c.user && c.user.avatar_url"
-        :src="c.author.avatar_url"
+        :src="c.user.avatar_url"
         :alt="`${name} 的头像`"
         loading="lazy"
       >
       <span v-else class="cm-av-fb">{{ name.slice(0, 1) }}</span>
-      <i v-if="c.author && c.author.provider" class="cm-pv" :title="PROVIDER_LABEL[c.author.provider] || c.author.provider">
+      <i v-if="c.user && c.user.provider" class="cm-pv" :title="PROVIDER_LABEL[c.user.provider] || c.user.provider">
-        <svg v-if="BRANDS[c.author.provider]" viewBox="0 0 24 24" aria-hidden="true">
+        <svg v-if="BRANDS[c.user.provider]" viewBox="0 0 24 24" aria-hidden="true">
-          <path :d="BRANDS[c.author.provider]" />
+          <path :d="BRANDS[c.user.provider]" />
         </svg>
       </i>
     </div>

frontend/src/components/comments/CommentSection.vue

@@ -1,5 +1,5 @@
 <script setup>
-import { computed, nextTick, onMounted, ref } from 'vue'
+import { computed, nextTick, onBeforeUnmount, onMounted, ref, watch } from 'vue'
 import { site } from '../../site'
 import { reader, loadReader, signIn, signOut } from '../../reader'
 import { readerApi } from '../../api'
@@ -20,7 +20,19 @@ const props = defineProps({
 })
 
 const api = useComments(props.postId)
-const { s, remaining, load, setSort, submit, saveEdit, remove, loadMoreReplies, startReply, startEdit, cancel } = api
+const { s, remaining, load, refresh, setSort, submit, saveEdit, remove, loadMoreReplies, startReply, startEdit, cancel } = api
+
+// 新评论实时出现：订阅这篇文章的 SSE 频道，后端广播「评论变了」就静默刷新。
+// EventSource 自带断线重连；路由换文章时关旧开新。
+let stream = null
+function openStream() {
+  if (stream) stream.close()
+  if (!props.postId || typeof EventSource === 'undefined') return
+  stream = new EventSource(`/api/comments/stream?post_id=${props.postId}`)
+  stream.addEventListener('comments', () => refresh())
+}
+watch(() => props.postId, openStream, { immediate: true })
+onBeforeUnmount(() => stream && stream.close())
 
 // 总开关在站点设置里。后端阶段二才会下发 comments_enabled —— 在那之前整个
 // 区块不渲染，线上访客不会看到一个请求 404 的半成品；后端一加就自动出现。
@@ -117,7 +129,7 @@ onMounted(() => {
       </div>
     </div>
 
-    <!-- 登录卡 / 输入框 -->
+    <!-- 登录卡 / 禁言 / 输入框 -->
     <div v-if="!reader.loaded" class="cm-gate cm-gate-skel" aria-hidden="true" />
     <div v-else-if="!reader.user" class="cm-gate">
       <p class="cm-gate-t">使用社交账号登录</p>
@@ -141,6 +153,10 @@ onMounted(() => {
       <!-- Telegram 官方按钮落到这里 -->
       <div ref="tgBox" class="cm-tg" />
     </div>
+    <div v-else-if="reader.user.banned" class="cm-gate cm-gate-banned">
+      <p class="cm-gate-t">你已被禁言，暂时无法参与评论。</p>
+      <p class="cm-gate-hint">如有疑问请联系站主。</p>
+    </div>
     <div v-else class="cm-compose">
       <div class="cm-av cm-av-me">
         <img v-if="reader.user.avatar_url" :src="reader.user.avatar_url" alt="" loading="lazy">

frontend/src/composables/useComments.js

@@ -59,6 +59,24 @@ export function useComments(postId) {
     load(true)
   }
 
+  // SSE 触发的静默刷新：回到第一页按当前排序重拉，不亮加载态——
+  // 别人发了新评论时页面只是「悄悄长出」新内容，不该闪一下。
+  // 返回 true 表示列表真的变了（顶层条数有差异）。
+  async function refresh() {
+    try {
+      const data = await readerApi.comments(postId, { sort: s.sort, page: 1, size: PAGE_SIZE })
+      if (s.loading || s.loadingMore || s.replyTo || s.editing) return false
+      const items = (data && data.items) || []
+      const changed = (data && data.total) !== s.total || items.some((c, i) => !s.items[i] || s.items[i].id !== c.id || s.items[i].edited_at !== c.edited_at)
+      s.items = items
+      s.page = 1
+      s.total = (data && data.total) || 0
+      return changed
+    } catch {
+      return false
+    }
+  }
+
   // 发表 / 回复。成功后直接插进列表，不整页重拉 —— 位置按当前排序决定，
   // 用户刚发的东西必须马上看得见。
   async function submit(bodyMd, parent = null) {
@@ -167,6 +185,7 @@ export function useComments(postId) {
     s,
     remaining,
     load,
+    refresh,
     setSort,
     submit,
     saveEdit,

frontend/src/lightbox.js

@@ -0,0 +1,33 @@
+import { reactive } from 'vue'
+
+// 全站通用的图片预览（lightbox）。任何地方的配图都可以
+// openLightbox(list, index) 打开：list 是同组图片的 URL 数组，index 是
+// 点击的那张。Esc / 点空白 / 关闭钮收起，左右键或箭头在同组图片间切换。
+//
+// 注意：这里绝不能碰 body 的 inline overflow——样式表的 overflow-x: clip
+// 会被整个 overflow: hidden 覆盖，横向从「裁剪」变「可滚动容器」，
+// 手机上整页能被拖宽（真实事故）。背景滚动由 ImgLightbox 遮罩自己的
+// @wheel/@touchmove.prevent 拦截，滚动位置天然保留。
+const state = reactive({
+  list: [],
+  index: 0,
+  open: false
+})
+
+export const lightboxState = state
+
+export function openLightbox(list, index = 0) {
+  if (!list || !list.length) return
+  state.list = list
+  state.index = Math.max(0, Math.min(index, list.length - 1))
+  state.open = true
+}
+
+export function closeLightbox() {
+  state.open = false
+}
+
+export function stepLightbox(delta) {
+  if (!state.open || state.list.length < 2) return
+  state.index = (state.index + delta + state.list.length) % state.list.length
+}

frontend/src/router.js

@@ -18,6 +18,7 @@ const routes = [
       { path: 'posts', name: 'admin-posts', component: () => import('./admin/PostsView.vue') },
       { path: 'new', name: 'admin-new', component: () => import('./admin/EditorView.vue') },
       { path: 'files', name: 'admin-files', component: () => import('./admin/FilesView.vue') },
+      { path: 'comments', name: 'admin-comments', component: () => import('./admin/CommentsView.vue') },
       { path: ':id', name: 'admin-edit', component: () => import('./admin/EditorView.vue') },
       { path: 'tags', name: 'admin-tags', component: () => import('./admin/TagsView.vue') },
       { path: 'projects', name: 'admin-projects', component: () => import('./admin/ProjectsView.vue') },

frontend/src/site.js

@@ -1,10 +1,11 @@
 import { reactive, watch } from 'vue'
 import { publicApi } from './api'
+import { setThumbBase } from './utils'
 
 // 暗色皮肤固定为 ink —— 是当前唯一支持的暗端皮肤。
 const DARK_SKIN = 'ink'
 // 亮色皮肤的合法集合（后台 Settings 也只让站主从这里选）
-const LIGHT_SKINS = ['paper', 'sage', 'rose']
+const LIGHT_SKINS = ['paper']
 
 // 客户端显示模式 —— 持久化在 localStorage
 const MODE_KEY = 'one.themeMode'
@@ -52,7 +53,7 @@ function systemPrefersDark() {
 
 // 模式 → 实际 data-theme 值
 //
-//   light / auto 亮端 → site.light_skin_id（站主在后台选的"基础亮色皮肤"）
+//   light / auto 亮端 → 固定纸感（paper）；皮肤选择已精简，暗端固定墨色
 //   dark             → ink（强制暗色）
 //
 // 后台的"基础亮色皮肤"是访客在任何「浅色偏好」下都会看到的；
@@ -100,7 +101,7 @@ export const site = reactive({
   loaded: false
 })
 
-// data-theme       → 前台皮肤。classic: paper/sage/rose/ink；vivid: vivid/vivid-dark
+// data-theme       → 前台皮肤。classic: paper/ink（亮端固定纸感）；vivid: vivid/vivid-dark
 // data-admin-theme → 后台明暗（light / dark），跟 site.themeMode 同步
 // data-ui          → 整站 UI 版本（classic / vivid）
 //
@@ -128,7 +129,7 @@ function applyTheme(animate = false) {
     setTimeout(() => el.classList.remove('theme-anim'), 300)
   }
   const isDark = site.themeMode === 'dark' || (site.themeMode === 'auto' && systemPrefersDark())
-  // vivid 自带亮/暗两套调色板，不复用 paper/sage/rose —— 否则两套 token 会互相打架。
+  // vivid 自带亮/暗两套调色板，不复用 classic 的纸感/墨色 —— 否则两套 token 会互相打架。
   const vivid = !adminScope && site.ui_id === 'vivid'
   const theme = vivid
     ? (isDark ? 'vivid-dark' : 'vivid')
@@ -152,8 +153,11 @@ if (typeof window !== 'undefined' && window.matchMedia) {
 
 export async function loadSite() {
   try {
-    const data = await publicApi.site()
+    const resp = await publicApi.site()
-    Object.assign(site, data)
+    // 响应结构：{ settings: {…}, uploads_public_base }
+    const { uploads_public_base, settings } = resp || {}
+    setThumbBase(uploads_public_base)
+    Object.assign(site, settings)
     // 防御性：服务端返回的 light_skin_id 必须是白名单之一，否则兜底 paper
     if (!isValidLightSkin(site.light_skin_id)) site.light_skin_id = 'paper'
     // ui_id 同理；同时回写本地缓存，让下一次首屏不用等接口就知道该用哪套 UI

frontend/src/styles.css

@@ -31,56 +31,34 @@
   --col-main: 640px;
   --col-right: 264px;
   --gutter: 28px;}
-:root[data-theme='ink'] {--paper: #1f1d1a;
+:root[data-theme='ink'] {/* 墨：暖炭底、暖白字、鎏金点缀。比旧版更中性（褪掉黄褐相），
-  --card: #25221e;
+     层次靠三档灰阶拉开；强调金提亮提纯，暗底上对比更足 */
-  --paper-sunken: #2b2722;
+  --paper: #191817;
-  --ink: #ece5d2;
+  --card: #201e1c;
-  --ink-soft: #c3b58f;
+  --paper-sunken: #262420;
-  --muted: #8c8270;
+  --ink: #e7e3da;
-  --faint: #6a6155;
+  --ink-soft: #b8b2a6;
-  --line: #3a352e;
+  --muted: #867f73;
-  --line-soft: #2f2b25;
+  --faint: #5f594f;
-  --accent: #c3a972;
+  --line: #34302b;
-  --accent-soft: rgba(195, 169, 114, 0.14);
+  --line-soft: #292623;
-  --accent-line: rgba(195, 169, 114, 0.4);}
+  --accent: #d9b97c;
-:root[data-theme='sage'] {--paper: #eef0e6;
+  --accent-soft: rgba(217, 185, 124, 0.12);
-  --card: #f6f7ef;
+  --accent-line: rgba(217, 185, 124, 0.4);}
-  --paper-sunken: #e2e6d6;
+:root[data-admin-theme='dark'] {--admin-bg: #191817;
-  --ink: #2a3127;
-  --ink-soft: #475042;
-  --muted: #6f7a68;
-  --faint: #94a08d;
-  --line: #d6dcc9;
-  --line-soft: #e6e9d9;
-  --accent: #5f7b5c;
-  --accent-soft: rgba(95, 123, 92, 0.12);
-  --accent-line: rgba(95, 123, 92, 0.38);}
-:root[data-theme='rose'] {--paper: #f7eee6;
-  --card: #fdf5ee;
-  --paper-sunken: #ecdfd3;
-  --ink: #3a2922;
-  --ink-soft: #5e463d;
-  --muted: #9a7c6f;
-  --faint: #b89c91;
-  --line: #ead9cb;
-  --line-soft: #f0e2d5;
-  --accent: #a55a4a;
-  --accent-soft: rgba(165, 90, 74, 0.1);
-  --accent-line: rgba(165, 90, 74, 0.38);}
-:root[data-admin-theme='dark'] {--admin-bg: #1a1815;
   --admin-paper: var(--admin-bg);
-  --admin-card: #25221e;
+  --admin-card: #201e1c;
-  --admin-paper-sunken: #2f2b25;
+  --admin-paper-sunken: #262420;
-  --admin-ink: #ece5d2;
+  --admin-ink: #e7e3da;
-  --admin-ink-soft: #c3b58f;
+  --admin-ink-soft: #b8b2a6;
-  --admin-muted: #9a8f7e;
+  --admin-muted: #948c7f;
-  --admin-faint: #6e6557;
+  --admin-faint: #635c51;
-  --admin-line: #3a352e;
+  --admin-line: #34302b;
-  --admin-line-soft: #2f2b25;
+  --admin-line-soft: #292623;
-  --admin-accent: #c3a972;
+  --admin-accent: #d9b97c;
-  --admin-accent-soft: rgba(195, 169, 114, 0.16);
+  --admin-accent-soft: rgba(217, 185, 124, 0.16);
-  --admin-accent-line: rgba(195, 169, 114, 0.42);
+  --admin-accent-line: rgba(217, 185, 124, 0.42);
-  --admin-on-accent: #1a1815;
+  --admin-on-accent: #191817;
   --admin-danger: #d68d75;
   --admin-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
   --admin-overlay: rgba(0, 0, 0, 0.6);}
@@ -230,7 +208,10 @@ html.topbar-hidden {--topbar-h: 0px;}
   min-width: 0;}
 .prose {font-size: 16.5px;
   line-height: var(--lh);
-  color: var(--ink);}
+  color: var(--ink);
+  /* anywhere 而非 break-word：长 URL/长 token 要参与 min-content 计算，
+     否则时间线正文里的裸链接会把列撑破（真机上浏览器缩放适配后整页缩小+右侧留白） */
+  overflow-wrap: anywhere;}
 .prose > :first-child {margin-top: 22px;}
 .prose p {margin: 0 0 1.1em;}
 .prose > p:first-of-type::first-letter {float: left;
@@ -254,6 +235,17 @@ html.topbar-hidden {--topbar-h: 0px;}
   margin-top: 8px;
   background: var(--accent);}
 .prose h4 {font-size: 16.5px;}
+/* 悬停浮现的标题锚点（enhanceProse 注入，指向 heading id） */
+.prose .h-anchor {opacity: 0;
+  margin-left: 8px;
+  font-family: var(--mono);
+  font-size: 0.72em;
+  color: var(--faint);
+  text-decoration: none;
+  border-bottom: 0;
+  transition: opacity .2s;}
+.prose h2:hover .h-anchor, .prose h3:hover .h-anchor, .prose h4:hover .h-anchor {opacity: 1;}
+.prose .h-anchor:hover {color: var(--accent);}
 .prose blockquote {margin: 1.4em 0;
   padding: 2px 0 2px 18px;
   border-left: 2px solid var(--accent-line);
@@ -273,12 +265,32 @@ html.topbar-hidden {--topbar-h: 0px;}
   background: var(--paper-sunken);
   padding: 1px 5px;
   border-radius: 3px;}
+.prose .pre-wrap {position: relative;}
+.pre-copy {position: absolute;
+  top: 8px;
+  right: 8px;
+  z-index: 1;
+  padding: 3px 10px;
+  border: 0;
+  border-radius: 5px;
+  font-size: 12px;
+  color: inherit;
+  background: color-mix(in srgb, var(--ink) 14%, transparent);
+  opacity: 0;
+  cursor: pointer;
+  transition: opacity .15s, transform .08s;}
+.pre-copy:hover {opacity: 1;}
+.pre-wrap:hover .pre-copy {opacity: 0.85;}
+.pre-copy:active {transform: translateY(2px);}
+.pre-copy.done {opacity: 1;
+  color: var(--accent);}
 .prose pre {background: var(--paper-sunken);
   border: 1px solid var(--line-soft);
-  border-radius: 4px;
+  border-radius: 10px;
-  padding: 14px 16px;
+  padding: 16px 18px;
-  overflow-x: auto;
+  overflow: auto;
-  line-height: 1.7;}
+  line-height: 1.7;
+  max-height: 30.5em;}
 .prose pre code {background: none;
   padding: 0;
   font-size: 13.5px;}
@@ -289,14 +301,22 @@ html.topbar-hidden {--topbar-h: 0px;}
   background: var(--line);
   margin: 2em 0;}
 .prose table {width: 100%;
-  border-collapse: collapse;
+  border-collapse: separate;
-  margin: 1.4em 0;
+  border-spacing: 0;
-  font-size: 15px;}
+  margin: 1.6em 0;
-.prose th, .prose td {border: 1px solid var(--line);
+  font-size: 14.5px;
-  padding: 7px 10px;
+  border: 1px solid var(--line);
+  border-radius: 10px;
+  overflow: hidden;}
+.prose th, .prose td {border: 0;
+  border-bottom: 1px solid var(--line-soft);
+  padding: 11px 16px;
   text-align: left;}
+.prose tr > * + * {border-left: 1px solid var(--line-soft);}
+.prose tbody tr:last-child td {border-bottom: 0;}
 .prose th {background: var(--paper-sunken);
   font-weight: 600;}
+.prose tbody tr:nth-child(even) {background: color-mix(in srgb, var(--paper-sunken) 55%, transparent);}
 .prose-short {font-size: 20px;
   line-height: 1.9;}
 .prose-short > p:first-of-type::first-letter {float: none;
@@ -304,6 +324,32 @@ html.topbar-hidden {--topbar-h: 0px;}
   line-height: inherit;
   margin: 0;
   color: inherit;}
+/* 时间线里的短文同样不放大首字：一句话的纸条压个大字像截断
+   （详情页 .prose-short 同此；长文详情的首字下沉保留） */
+.prose.short-body > p:first-of-type::first-letter {float: none;
+  font-size: inherit;
+  line-height: inherit;
+  font-family: inherit;
+  margin: 0;
+  color: inherit;}
+/* 短文配图：Twitter 式网格（快发盒上传，≤4 张；详情页用） */
+.post-imgs {display: grid;
+  gap: 3px;
+  margin-top: 18px;
+  border-radius: 6px;
+  overflow: hidden;}
+.post-imgs img {display: block;
+  width: 100%;
+  height: 100%;
+  object-fit: cover;}
+.post-imgs.n2, .post-imgs.n4 {grid-template-columns: 1fr 1fr;}
+.post-imgs.n3 {grid-template-columns: 1fr 1fr;}
+.post-imgs.n2 img, .post-imgs.n4 img {aspect-ratio: 1;}
+.post-imgs.n3 img {aspect-ratio: 1;}
+.post-imgs.n3 img:first-child {grid-row: span 2;
+  aspect-ratio: auto;
+  height: 100%;}
+.post-imgs.n1 img {max-height: 560px;}
 .empty {padding: 48px 0;
   text-align: center;
   color: var(--muted);
@@ -809,17 +855,37 @@ html.topbar-hidden {--topbar-h: 0px;}
   0%, 100% {opacity: 1;}
   50% {opacity: 0.3;}
 }
+/* md 页签容器现在是 CodeMirror 挂载点（原为 textarea） */
 .md-pane {width: 100%;
   min-height: 460px;
   border: 1px solid var(--admin-line);
   border-radius: 3px;
   background: var(--admin-card);
-  padding: 18px 22px;
+  padding: 6px 14px;
-  font-family: var(--mono);
-  font-size: 14px;
-  line-height: 1.7;
   color: var(--admin-ink);
-  resize: vertical;
+  overflow: hidden;}
+.md-pane:focus-within {border-color: var(--admin-accent);}
+/* 轻提示栈：上传进度 / 转存结果 / 校验失败 */
+.toast-stack {position: fixed;
+  right: 18px;
+  bottom: 18px;
+  z-index: 90;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  max-width: 360px;}
+.toast {padding: 9px 14px;
+  border-radius: 6px;
+  font-size: 13px;
+  line-height: 1.6;
+  color: var(--admin-ink);
+  background: var(--admin-card);
+  border: 1px solid var(--admin-line);
+  box-shadow: 0 6px 24px rgba(0,0,0,.12);
+  overflow-wrap: anywhere;}
+.toast.ok {border-color: color-mix(in srgb, var(--admin-accent) 55%, transparent);}
+.toast.err {border-color: #c26a55;
+  color: #b4553f;
   outline: none;}
 .md-pane:focus {border-color: var(--admin-accent);}
 .toolbar {display: flex;
@@ -842,12 +908,13 @@ html.topbar-hidden {--topbar-h: 0px;}
   color: var(--admin-muted);
   margin-right: 4px;
   text-transform: uppercase;}
-.tb-btn {width: 28px;
+/* xLog 式工具栏按钮：方形圆角、线性图标、悬停出底框 */
-  height: 28px;
+.tb-btn {width: 32px;
+  height: 32px;
   border: 1px solid transparent;
-  border-radius: 3px;
+  border-radius: 6px;
   background: transparent;
-  color: var(--admin-ink-soft);
+  color: var(--admin-muted);
   cursor: pointer;
   font-size: 12.5px;
   display: inline-flex;
@@ -860,9 +927,12 @@ html.topbar-hidden {--topbar-h: 0px;}
   border-color: var(--admin-line);
   color: var(--admin-ink);}
 }
-.tb-btn.italic {font-style: italic;}
+.tb-btn svg {width: 17px;
-.tb-btn.mono {font-family: var(--mono);
+  height: 17px;}
-  font-size: 11.5px;}
+.tb-text {font-family: var(--mono);
+  font-size: 11.5px;
+  font-weight: 700;
+  color: inherit;}
 .tb-popover {display: flex;
   gap: 6px;
   padding: 8px;
@@ -1357,4 +1427,25 @@ a.cm-name-a:hover {color: var(--accent);}
   .cm-link {padding: 8px 2px;}
   .cm-more-r {padding: 10px 0;}
   .cm-input {font-size: 16px;}
-}
+}
+/* 编辑器图片缩放把手：Milkdown 图片块 hover 底部出现拖拽条（上下拖调高度，
+   比例存进 markdown 的 alt）。默认半透明让访客知道它在那儿。 */
+.admin-shell .image-resize-handle {opacity: 0.45;}
+.admin-shell .image-wrapper:hover .image-resize-handle {opacity: 1;}
+
+/* lightbox 打开时藏掉吸顶/固定栏：一是全屏观感，二是绕开真机上
+   backdrop-filter 元素合成层盖过遮罩的 Chromium 绘制问题 */
+body.lb-open .sticky-head,
+body.lb-open .topbar,
+body.lb-open .reading-bar {visibility: hidden;}
+
+/* classic 文章页阅读进度条：视口顶部细线，vivid 的同款能力 */
+.reading-bar {position: fixed;
+  top: 0;
+  left: 0;
+  height: 2px;
+  width: 0;
+  background: var(--accent);
+  z-index: 60;
+  transition: width .1s linear;
+  pointer-events: none;}

frontend/src/ui/yohaku/YohakuArticle.vue

@@ -1,7 +1,9 @@
 <script setup>
 import { computed, onBeforeUnmount, onMounted, ref } from 'vue'
-import { sanitizeHtml } from '../../utils'
+import { applyImageRatio, sanitizeHtml } from '../../utils'
+import { openLightbox } from '../../lightbox'
 import CommentSection from '../../components/comments/CommentSection.vue'
+import LinkCard from '../../components/LinkCard.vue'
 
 // 余白文章页。对应设计稿 viewPost() 的三栏「纸」：
 //   左 side-l ： 时间线（当前篇前后各两篇，标签来自位置）
@@ -166,7 +168,27 @@ function onTocClick(e) {
         <!-- 短文不渲染标题：正文第一句就是全部，再给个截断标题是重复 -->
         <h1 v-if="isShort" class="sr-only">{{ title }}</h1>
 
-        <div class="prose" :class="{ 'prose-note': isShort }" v-html="sanitizeHtml(props.contentHtml)" />
+        <div class="prose" :class="{ 'prose-note': isShort }" v-html="applyImageRatio(sanitizeHtml(props.contentHtml))" />
+
+        <!-- 短文配图：Twitter 式网格（快发盒上传）；点图开预览 -->
+        <div
+          v-if="isShort && props.post.images && props.post.images.length"
+          class="post-imgs"
+          :class="'n' + Math.min(props.post.images.length, 4)"
+        >
+          <img
+            v-for="(u, i) in props.post.images.slice(0, 4)"
+            :key="i"
+            :src="u"
+            alt=""
+            loading="lazy"
+            decoding="async"
+            @click="openLightbox(props.post.images, i)"
+          />
+        </div>
+
+        <!-- 外链预览卡片：正文里第一个链接，发布时后端已抓好 -->
+        <LinkCard v-if="isShort && props.post.link_card" :card="props.post.link_card" />
 
         <div class="end">
           <RouterLink v-for="t in props.post.tags || []" :key="t" class="tg" to="/tags">{{ t }}</RouterLink>

frontend/src/ui/yohaku/YohakuFeed.vue

@@ -1,5 +1,8 @@
 <script setup>
 import { RouterLink } from 'vue-router'
+import { openLightbox } from '../../lightbox'
+import { thumbURL, thumbifyHtml } from '../../utils'
+import LinkCard from '../../components/LinkCard.vue'
 
 // 余白列表。对应设计稿的 <div class="feed">：长文是卡片（封面 + 标题 + 摘要 + 元信息 + 标签），
 // 短文是纸条（直接铺正文，元信息在正文后）。两种密度混在同一条时间线里，这是设计稿的主张。
@@ -34,7 +37,7 @@ const shortTitle = (p) => plain(p.content_html).slice(0, 40) + '…'
       <!-- 长文：卡片 -->
       <RouterLink v-if="p.kind === 'long'" class="card" :to="`/post/${encodeURIComponent(p.slug)}`">
         <div v-if="p.cover_url" class="cov">
-          <img :src="p.cover_url" alt="" loading="lazy">
+          <img :src="thumbURL(p.cover_url, 640)" alt="" loading="lazy">
         </div>
         <div class="body">
           <h2>{{ p.title }}</h2>
@@ -53,7 +56,26 @@ const shortTitle = (p) => plain(p.content_html).slice(0, 40) + '…'
 
       <!-- 短文：纸条，正文直接铺开 -->
       <RouterLink v-else class="note" :to="`/post/${encodeURIComponent(p.slug)}`">
-        <div class="body" v-html="p.content_html" />
+        <div class="body" v-html="thumbifyHtml(p.content_html)" />
+        <!-- 短文配图：Twitter 式网格（快发盒上传）；点图开预览（不跳详情） -->
+        <div
+          v-if="p.images && p.images.length"
+          class="imgs"
+          :class="'n' + Math.min(p.images.length, 4)"
+        >
+          <img
+            v-for="(u, i) in p.images.slice(0, 4)"
+            :key="i"
+            :src="thumbURL(u, p.images.length === 1 ? 720 : 480)"
+            alt=""
+            loading="lazy"
+            decoding="async"
+            @click.prevent.stop="openLightbox(p.images, i)"
+          />
+        </div>
+        <!-- 外链预览卡片：正文里第一个链接，发布时后端已抓好 -->
+        <LinkCard v-if="p.link_card" :card="p.link_card" />
+
         <div class="meta">
           <span class="badge short">SHORT</span>
           <time :datetime="p.published_at">{{ fmtDateTime(p.published_at) }}</time>

frontend/src/ui/yohaku/YohakuFoot.vue

@@ -1,6 +1,13 @@
 <script setup>
 import { RouterLink } from 'vue-router'
 import { site } from '../../site'
+import { socialIcon } from '../../socialIcons'
+
+// 社交排只放站主自己的账号；源码仓库是「项目信息」，和 classic 页脚一样单独
+// 成行挂在版权旁边（RightRail 的 .foot-meta）。混在一起会让人以为这是本站的
+// 社交身份之一，而它其实是代码仓库入口。
+const PROJECT_REPO = 'https://git.gopher.ink/mirrors2/ONE'
+const social = (site.social_links || []).filter((s) => s && s.url && s.url !== PROJECT_REPO)
 
 // 余白页脚。对应设计稿的 <footer class="foot">。
 //
@@ -21,7 +28,20 @@ const links = [
 <template>
   <footer class="foot">
     <div class="quote">What&rsquo;s left unsaid holds the most weight.</div>
-    <div>{{ site.footer_note }}<template v-if="site.icp"> · {{ site.icp }}</template></div>
+    <div v-if="social.length" class="foot-social">
+      <a
+        v-for="s in social"
+        :key="s.label + s.url"
+        :href="s.url"
+        :title="s.label"
+        :aria-label="s.label"
+        :target="s.url.startsWith('http') ? '_blank' : undefined"
+        :rel="s.url.startsWith('http') ? 'noopener' : undefined"
+      >
+        <svg v-if="socialIcon(s.url)" viewBox="0 0 24 24" aria-hidden="true"><path :d="socialIcon(s.url)" /></svg>
+        <span v-else>{{ s.label }}</span>
+      </a>
+    </div>
     <div class="foot-nav">
       <template v-for="(l, i) in links" :key="l.to">
         <span v-if="i" class="sep">·</span>
@@ -30,5 +50,13 @@ const links = [
       <span class="sep">·</span>
       <a href="/rss.xml">RSS</a>
     </div>
+    <!-- 项目信息：固定的源码入口 + 版权，压在最后。和上面那排社交账号分开——
+         它是代码仓库入口，不是站主的社交身份（顺序同 classic 的 RightRail） -->
+    <div class="foot-meta">
+      <a :href="PROJECT_REPO" title="项目源码" aria-label="项目源码" target="_blank" rel="noopener">
+        <svg viewBox="0 0 24 24" aria-hidden="true"><path :d="socialIcon(PROJECT_REPO)" /></svg>
+      </a>
+      <span>{{ site.footer_note }}<template v-if="site.icp"> · {{ site.icp }}</template></span>
+    </div>
   </footer>
 </template>

frontend/src/ui/yohaku/YohakuHome.vue

@@ -4,6 +4,7 @@ import YohakuHero from './YohakuHero.vue'
 import YohakuToolbar from './YohakuToolbar.vue'
 import YohakuFeed from './YohakuFeed.vue'
 import YohakuPager from './YohakuPager.vue'
+import { thumbURL } from '../../utils'
 
 // 首页装配。对应设计稿 viewHome() 的 DOM 顺序：
 // hero → wrap(toolbar + feed + empty + pager) → showcase（作品前三件 + 查看所有）。
@@ -81,7 +82,7 @@ const emit = defineEmits(['update:kind', 'update:tag', 'update:query', 'go'])
         to="/projects"
       >
         <div v-if="p.cover_url" class="cov">
-          <img :src="p.cover_url" alt="" loading="lazy">
+          <img :src="thumbURL(p.cover_url, 480)" alt="" loading="lazy">
           <span v-if="p.status" class="st">{{ p.status }}</span>
         </div>
         <div class="body">

frontend/src/ui/yohaku/article.css

@@ -96,8 +96,12 @@ html[data-ui='vivid'] .prose code {font-family:var(--mono);font-size:.88em;
   padding:2px 7px;border-radius:6px;}
 html[data-ui='vivid'] .prose pre {background:color-mix(in srgb,var(--ink) 92%,var(--accent));
   color:#e8e8f0;padding:18px 20px;border-radius:12px;
-  overflow-x:auto;font-size:13.5px;line-height:1.7;
+  overflow:auto;font-size:13.5px;line-height:1.7;
-  box-shadow:var(--shadow-lg);}
+  box-shadow:var(--shadow-lg);
+  max-height:30.5em;}
+/* 复制按钮（vivid 配色：浅字浮在深底上） */
+html[data-ui='vivid'] .pre-copy {color:#e8e8f0;
+  background:rgba(255,255,255,.14);}
 /* 暗色下「92% ink」混出的是浅底，浅底配浅字没法读；暗端换深底微混强调色 */
 html[data-ui='vivid'][data-theme='vivid-dark'] .prose pre {
   background:color-mix(in srgb,var(--paper) 86%,var(--accent));
@@ -130,6 +134,11 @@ html[data-ui='vivid'] .paper > .end {margin-top:40px;padding-top:24px;border-top
   display:flex;gap:14px;flex-wrap:wrap;align-items:center;}
 html[data-ui='vivid'] .paper > .end .tg {padding:6px 0}
 
+/* 短文配图：Twitter 式网格（快发盒上传，≤4 张；跟 prose 同宽，圆角跟 vivid 走） */
+html[data-ui='vivid'] .post-imgs {margin-top: 6px;
+  border-radius: var(--radius);}
+html[data-ui='vivid'] .post-imgs.n1 img {max-height: 520px;}
+
 /* ==========================================================================
    把 classic 的 .prose 挡回去
    --------------------------------------------------------------------------
@@ -210,3 +219,17 @@ html[data-ui='vivid'] .sr-only {position: absolute;
   white-space: nowrap;
   border: 0;}
 html[data-ui='vivid'] .toc a:active { color: var(--accent); }
+
+/* ---- 表格（xLog 式：圆角容器 + 斑马纹，替代满格线） ---- */
+html[data-ui='vivid'] .prose table {width:100%;
+  border-collapse:separate;border-spacing:0;
+  margin:1.8em 0;font-size:14px;
+  border:1px solid var(--line);border-radius:12px;overflow:hidden;}
+html[data-ui='vivid'] .prose th, html[data-ui='vivid'] .prose td {border:0;
+  border-bottom:1px solid var(--line-soft);
+  padding:12px 18px;text-align:left;}
+html[data-ui='vivid'] .prose tr > * + * {border-left:1px solid var(--line-soft);}
+html[data-ui='vivid'] .prose tbody tr:last-child td {border-bottom:0;}
+html[data-ui='vivid'] .prose th {background:var(--accent-soft);font-weight:600;}
+html[data-ui='vivid'] .prose tbody tr:nth-child(even) {background:var(--card);}
+/* 标题锚点 + 复制按钮沿用 classic 的 .h-anchor/.pre-copy 基础样式 */

frontend/src/ui/yohaku/chrome.css

@@ -169,6 +169,25 @@ html[data-ui='vivid'] .foot {max-width:1100px;margin:40px auto 0;padding:28px 28
   border-top:1px solid var(--line);
   text-align:center;color:var(--muted);font-size:12.5px;line-height:2;}
 html[data-ui='vivid'] .foot a {color:var(--accent);font-weight:600;transition:opacity .25s}
+/* 页脚社交排：图标居中一行，与 classic 页脚同步 */
+html[data-ui='vivid'] .foot-social {display:flex;justify-content:center;align-items:center;
+  gap:18px;margin:14px 0 18px;}
+html[data-ui='vivid'] .foot-social a {color:var(--soft);font-weight:400;
+  display:inline-flex;align-items:center;justify-content:center;
+  width:30px;height:30px;border-radius:8px;transition:color .25s,background .25s;}
+html[data-ui='vivid'] .foot-social a:hover {color:var(--accent);background:var(--accent-soft);}
+html[data-ui='vivid'] .foot-social svg {width:17px;height:17px;fill:currentColor;}
+html[data-ui='vivid'] .foot-social span {font-size:12px;}
+/* 项目信息行：源码入口 + 版权。刻意不并进 .foot-social——那一排是站主的社交
+   身份，源码是仓库入口，混在一起会让人以为它也是一个社交账号。
+   放在 .foot a 规则之后：两者特指度相同，靠后者才能压掉默认的强调色。 */
+html[data-ui='vivid'] .foot-meta {display:flex;justify-content:center;align-items:center;
+  gap:8px;margin:16px 0 0;color:var(--muted);}
+html[data-ui='vivid'] .foot-meta a {display:inline-flex;align-items:center;justify-content:center;
+  width:26px;height:26px;border-radius:7px;color:var(--soft);font-weight:400;
+  transition:color .25s,background .25s;}
+html[data-ui='vivid'] .foot-meta a:hover {color:var(--accent);background:var(--accent-soft);}
+html[data-ui='vivid'] .foot-meta svg {width:15px;height:15px;fill:currentColor;}
 @media (hover: hover) and (pointer: fine) {
   html[data-ui='vivid'] .foot a:hover {opacity:.75}
 }

frontend/src/ui/yohaku/home.css

@@ -121,13 +121,31 @@ html[data-ui='vivid'] .note {display:block;background:transparent;
 }
 html[data-ui='vivid'] .note .meta {display:flex;gap:10px;align-items:center;
   font-size:12px;color:var(--muted);font-weight:600;margin-top:16px;}
-html[data-ui='vivid'] .note .body {margin:0;font-size:15.5px;line-height:1.8;color:var(--text);}
+html[data-ui='vivid'] .note .body {margin:0;font-size:15.5px;line-height:1.8;color:var(--text);
+  /* 短文正文用的是 .body 而不是 .prose，所以拿不到 styles.css 里 .prose 的
+     overflow-wrap:anywhere——裸链接这种不可断行的长 token 会把整列撑到 550px+，
+     手机上表现为页面横向能滚、右侧留白。用 anywhere 而非 break-word：
+     要让它参与 min-content 计算才真正压得住列宽。 */
+  overflow-wrap:anywhere;}
 html[data-ui='vivid'] .note .body a {color:var(--accent);font-weight:600;
   border-bottom:1px solid color-mix(in srgb,var(--accent) 40%,transparent);
   transition:border-color .25s;}
 @media (hover: hover) and (pointer: fine) {
   html[data-ui='vivid'] .note .body a:hover {border-bottom-color:var(--accent)}
 }
+/* 短文配图：Twitter 式网格（快发盒上传，≤4 张） */
+html[data-ui='vivid'] .note .imgs {display:grid;gap:3px;margin-top:10px;
+  border-radius:var(--radius);overflow:hidden;}
+html[data-ui='vivid'] .note .imgs img {display:block;width:100%;height:100%;
+  object-fit:cover;cursor:zoom-in;}
+html[data-ui='vivid'] .note .imgs.n2,
+html[data-ui='vivid'] .note .imgs.n4 {grid-template-columns:1fr 1fr;}
+html[data-ui='vivid'] .note .imgs.n3 {grid-template-columns:1fr 1fr;}
+html[data-ui='vivid'] .note .imgs.n2 img,
+html[data-ui='vivid'] .note .imgs.n4 img {aspect-ratio:1;}
+html[data-ui='vivid'] .note .imgs.n3 img {aspect-ratio:1;}
+html[data-ui='vivid'] .note .imgs.n3 img:first-child {grid-row:span 2;
+  aspect-ratio:auto;height:100%;}
 html[data-ui='vivid'] .note .tags {display:flex;gap:14px;flex-wrap:wrap;margin-top:8px}
 html[data-ui='vivid'] .pager {display:flex;gap:8px;align-items:center;justify-content:center;
   margin-top:36px;flex-wrap:wrap;}

frontend/src/utils.js

@@ -3,7 +3,77 @@ import DOMPurify from 'dompurify'
 // 后端 goldmark 已转义原始 HTML，这里再过一道 DOMPurify 作纵深防御，
 // 所有 v-html 出口必须经过它。
 export function sanitizeHtml(html) {
-  return DOMPurify.sanitize(html || '')
+  return enhanceProse(DOMPurify.sanitize(html || ''))
+}
+
+// ---------- 缩略图 ----------
+// 时间线只展示小图：把我们存储上的图片直链改写为 /uploads/thumb/{key}?w=，
+// 后端懒生成并永久缓存。识别规则：以 uploads_public_base 开头的直链，
+// 或同源的 /uploads/ 相对路径（本地存储兜底）。外链（图床/头像）原样返回。
+// base 由 site.js 拉到站点设置后经 setThumbBase 注入（不走 import 避免循环依赖）。
+const IMG_EXT = /\.(jpe?g|png|gif)([?#].*)?$/i
+let thumbBase = ''
+
+export function setThumbBase(base) {
+  thumbBase = (base || '').replace(/\/+$/, '')
+}
+
+export function thumbURL(u, w = 480) {
+  if (!u || typeof u !== 'string') return u
+  let key = ''
+  if (thumbBase && u.startsWith(thumbBase + '/')) key = u.slice(thumbBase.length + 1)
+  else if (u.startsWith('/uploads/') && !u.startsWith('/uploads/thumb/')) key = u.slice('/uploads/'.length)
+  else return u
+  if (!IMG_EXT.test(key)) return u
+  return '/uploads/thumb/' + key + '?w=' + w
+}
+
+// ---------- xLog 式排版增强 ----------
+// 对消毒后的正文 HTML 做三件展示层增强（markdown/库里内容不动）：
+// 1) pre 包一层容器并注入悬停复制按钮；
+// 2) 带 id 的标题（withHeadingIds 生成）尾部加 # 锚点；
+// 3) （盘古之白在后端渲染出口做，见 backend/internal/render/pangu.go）
+export function enhanceProse(html) {
+  if (!html) return html
+  // 复制按钮：包在 .pre-wrap 里，按钮悬浮于 pre 右上
+  html = html
+    .replace(/<pre\b/g, '<div class="pre-wrap"><button type="button" class="pre-copy" aria-label="复制代码">复制</button><pre')
+    .replace(/<\/pre>/g, '</pre></div>')
+  // 标题锚点：h2-h4 且有 id 的，末尾补一个 # 链接（悬停浮现）
+  html = html.replace(
+    /<h([2-4])([^>]*\bid="([^"]+)"[^>]*)>([\s\S]*?)<\/h\1>/g,
+    (m, lvl, attrs, id, inner) =>
+      `<h${lvl}${attrs}>${inner}<a class="h-anchor" href="#${id}" aria-label="标题链接">#</a></h${lvl}>`
+  )
+  return html
+}
+
+// 编辑器拖拽缩放的比例展示：Milkdown 图片块把高度比例写进 markdown 的 alt
+// （![0.6](url)），渲染出的 <img alt="0.6"> 在这里还原成对应的宽度并居中。
+// 纯数字 alt 才生效（>=1 的当 100% 处理），正常图片的描述性 alt 不受影响。
+export function applyImageRatio(html) {
+  if (!html) return html
+  return html.replace(/<img\b[^>]*>/gi, (tag) => {
+    const m = tag.match(/\balt="(\d*\.?\d+)"/i)
+    if (!m) return tag
+    const ratio = Number.parseFloat(m[1])
+    if (!Number.isFinite(ratio) || ratio <= 0 || ratio >= 1) return tag
+    const style = `display:block;width:${(ratio * 100).toFixed(1)}%;max-width:100%;height:auto;margin-inline:auto;`
+    if (/\bstyle="/i.test(tag)) return tag.replace(/\bstyle="/i, 'style="' + style)
+    return tag.replace(/^<img/i, '<img style="' + style + '"')
+  })
+}
+
+// 时间线正文 HTML（短文全文 / 长文 600 字符截断）里的 <img> 换缩略图 + 补懒加载。
+// 只在展示层重写，库里存的正文不动。截断的 HTML 可能带半截标签，
+// 正则只匹配完整的 <img ...src="..."> ，坏尾巴交给 sanitize/浏览器容错。
+export function thumbifyHtml(html, w = 480) {
+  if (!html) return html
+  return html.replace(/<img\b[^>]*?>/gi, (tag) => {
+    let out = tag.replace(/\bsrc="([^"]*)"/i, (m, src) => 'src="' + thumbURL(src, w) + '"')
+    if (!/\bloading=/i.test(out)) out = out.replace(/^<img/i, '<img loading="lazy"')
+    return out
+  })
 }
 
 // 用 Intl.DateTimeFormat — locale 感知，未来要 i18n 只换 locale 即可

frontend/src/views/PostView.vue

@@ -1,13 +1,15 @@
 <script setup>
-import { computed, onMounted, ref, watch } from 'vue'
+import { computed, onBeforeUnmount, onMounted, ref, watch } from 'vue'
 import { useRoute } from 'vue-router'
 import LeftNav from '../components/LeftNav.vue'
 import RightRail from '../components/RightRail.vue'
 import YohakuArticle from '../ui/yohaku/YohakuArticle.vue'
 import CommentSection from '../components/comments/CommentSection.vue'
+import LinkCard from '../components/LinkCard.vue'
+import { openLightbox } from '../lightbox'
 import { publicApi } from '../api'
 import { site, applyDocTitle } from '../site'
-import { formatDate, minutesLabel, sanitizeHtml } from '../utils'
+import { applyImageRatio, formatDate, minutesLabel, sanitizeHtml } from '../utils'
 
 const route = useRoute()
 const post = ref(null)
@@ -31,6 +33,14 @@ function withHeadingIds(html) {
 const contentHtml = ref('')
 const headings = ref([])
 
+// 顶部阅读进度条（classic）：滚动过正文才算数，短文太短不显示
+const progress = ref(0)
+function onScroll() {
+  const doc = document.documentElement
+  const total = doc.scrollHeight - window.innerHeight
+  progress.value = total > 300 ? Math.min(100, (window.scrollY / total) * 100) : 0
+}
+
 async function load() {
   loading.value = true
   error.value = ''
@@ -40,7 +50,7 @@ async function load() {
   try {
     post.value = await publicApi.post(route.params.slug)
     const prepared = withHeadingIds(post.value.content_html)
-    contentHtml.value = prepared.html
+    contentHtml.value = applyImageRatio(prepared.html)
     headings.value = prepared.headings
     applyDocTitle(post.value.kind === 'short' ? '短文' : post.value.title)
   } catch (e) {
@@ -50,7 +60,11 @@ async function load() {
   }
 }
 
-onMounted(load)
+onMounted(() => {
+  load()
+  window.addEventListener('scroll', onScroll, { passive: true })
+})
+onBeforeUnmount(() => window.removeEventListener('scroll', onScroll))
 watch(() => route.params.slug, load)
 
 const isShort = computed(() => post.value && post.value.kind === 'short')
@@ -69,6 +83,8 @@ const initial = computed(() => (site.author_name || 'O').trim().slice(0, 1).toUp
   />
 
   <div v-else class="shell">
+    <!-- 阅读进度：贴在视口顶部的细线 -->
+    <div class="reading-bar" :style="{ width: progress + '%' }" aria-hidden="true"></div>
     <div class="layout">
       <!-- LeftNav / RightRail 之前 import 了却没渲染，导致整页掉进 236px 的左列。
            补上，和 HomeView 的三栏一致。 -->
@@ -106,6 +122,26 @@ const initial = computed(() => (site.author_name || 'O').trim().slice(0, 1).toUp
             v-html="sanitizeHtml(contentHtml)"
           ></div>
 
+          <!-- 短文配图：Twitter 式网格（快发盒上传）；点图开预览 -->
+          <div
+            v-if="isShort && post.images && post.images.length"
+            class="post-imgs"
+            :class="'n' + Math.min(post.images.length, 4)"
+          >
+            <img
+              v-for="(u, i) in post.images.slice(0, 4)"
+              :key="i"
+              :src="u"
+              alt=""
+              loading="lazy"
+              decoding="async"
+              @click="openLightbox(post.images, i)"
+            />
+          </div>
+
+          <!-- 外链预览卡片：正文里第一个链接，发布时后端已抓好 -->
+          <LinkCard v-if="isShort && post.link_card" :card="post.link_card" />
+
           <footer class="foot">
             <div v-if="post.tags && post.tags.length" class="tags">
               <RouterLink
@@ -124,7 +160,7 @@ const initial = computed(() => (site.author_name || 'O').trim().slice(0, 1).toUp
         <!-- 评论区（和 vivid 共用同一个组件，见 components/comments/） -->
         <CommentSection v-if="post" :post-id="post.id" />
       </main>
-      <RightRail />
+      <RightRail :toc="isShort ? [] : headings" />
     </div>
   </div>
 </template>

frontend/vite.config.ts

@@ -16,6 +16,8 @@ export default defineConfig({
     port: 3000,
     proxy: {
       '/api': { target, changeOrigin: true },
+      // 上传文件与缩略图路由都在后端（/uploads/、/uploads/thumb/）
+      '/uploads': { target, changeOrigin: true },
       '/rss.xml': { target, changeOrigin: true },
       '/feed': { target, changeOrigin: true },
     },