模型限制: 系统配置全局开放/禁止 + 用户级限制 + 网关拦截

- User 新增 allowed_models/denied_models(用户级模型限制)
- 系统配置 model_allowlist/model_denylist 全局策略, 保存即时失效网关缓存
- 网关 checkModelAllowed: 用户级 > 全局(禁止命中→403, 白名单非空→仅白名单)
- 三个协议处理器均校验, 错误按客户端协议格式返回
- 配置页"模型限制"卡片(全局允许/禁止多选); 用户编辑支持允许/禁止模型

Co-Authored-By: Claude <noreply@anthropic.com>

server/internal/api/admin.go

@@ -48,11 +48,13 @@ func (h *Handler) AdminPatchUser(c *gin.Context) {
 		return
 	}
 	var req struct {
-		Username *string `json:"username"`
-		Email    *string `json:"email"`
-		Password *string `json:"password"`
-		Role     *string `json:"role"`
-		Status   *string `json:"status"`
+		Username      *string   `json:"username"`
+		Email         *string   `json:"email"`
+		Password      *string   `json:"password"`
+		Role          *string   `json:"role"`
+		Status        *string   `json:"status"`
+		AllowedModels *[]string `json:"allowed_models"`
+		DeniedModels  *[]string `json:"denied_models"`
 	}
 	if err := c.ShouldBindJSON(&req); err != nil {
 		resp.Fail(c, http.StatusBadRequest, "invalid input")
@@ -113,6 +115,15 @@ func (h *Handler) AdminPatchUser(c *gin.Context) {
 		}
 		updates["status"] = *req.Status
 	}
+	// 模型限制(jsonb)：手动序列化
+	if req.AllowedModels != nil {
+		raw, _ := json.Marshal(*req.AllowedModels)
+		updates["allowed_models"] = string(raw)
+	}
+	if req.DeniedModels != nil {
+		raw, _ := json.Marshal(*req.DeniedModels)
+		updates["denied_models"] = string(raw)
+	}
 	if len(updates) == 0 {
 		resp.OK(c, gin.H{"ok": true})
 		return
@@ -211,5 +222,9 @@ func (h *Handler) AdminPutConfig(c *gin.Context) {
 		resp.Fail(c, http.StatusInternalServerError, "failed to save config")
 		return
 	}
+	// 模型限制等策略可能变化，立即失效缓存
+	if h.gw != nil {
+		h.gw.ResetModelPolicy()
+	}
 	resp.OK(c, gin.H{"ok": true})
 }

server/internal/api/auth.go

@@ -8,18 +8,20 @@ import (
 	"time"
 
 	"github.com/gin-gonic/gin"
-	"github.com/openteam/server/internal/app"
 	"github.com/openteam/server/internal/api/middleware"
+	"github.com/openteam/server/internal/app"
 	"github.com/openteam/server/internal/pkg/resp"
+	"github.com/openteam/server/internal/proxy"
 	"github.com/openteam/server/internal/store"
 )
 
 // Handler 聚合所有管理 API。
 type Handler struct {
-	a *app.App
+	a  *app.App
+	gw *proxy.Gateway
 }
 
-func NewHandler(a *app.App) *Handler { return &Handler{a: a} }
+func NewHandler(a *app.App, gw *proxy.Gateway) *Handler { return &Handler{a: a, gw: gw} }
 
 // ---------------------------------------------------------------------------
 // 认证
@@ -219,6 +221,8 @@ func (h *Handler) publicUser(u *store.User) gin.H {
 		"role":       u.Role,
 		"balance":    u.Balance,
 		"status":     u.Status,
+		"allowed_models": u.AllowedModels,
+		"denied_models":  u.DeniedModels,
 		"created_at": u.CreatedAt,
 	}
 }

server/internal/api/router.go

@@ -21,7 +21,7 @@ func NewRouter(a *app.App, gw *proxy.Gateway) *gin.Engine {
 	r := gin.New()
 	r.Use(gin.Logger(), gin.Recovery(), middleware.CORS())
 
-	h := NewHandler(a)
+	h := NewHandler(a, gw)
 
 	// --- 代理端点（对外）---
 	proxyGroup := r.Group("/v1")