refactor: 命令树移入 internal/cli，去掉 DefaultRun 注入

- cmd/server/cmd → internal/cli，与 internal/api、internal/proxy 平级
- serve() 移入 cli 包作为默认子命令，main.go 退化为纯入口
- 消除 cmd/cmd 冗余层级和 main → cmd 的回调注入

server/cmd/server/main.go

@@ -2,69 +2,8 @@
 // 启动：OT_PROXY_UPSTREAM_KEY=sk-xxx go run ./cmd/server
 package main
 
-import (
-	"context"
-	"errors"
-	"log"
-	"net/http"
-	"os"
-	"os/signal"
-	"strconv"
-	"syscall"
-	"time"
-
-	"github.com/openteam/server/cmd/server/cmd"
-	"github.com/openteam/server/internal/api"
-	"github.com/openteam/server/internal/app"
-	"github.com/openteam/server/internal/config"
-	"github.com/openteam/server/internal/proxy"
-)
-
-func init() {
-	cmd.DefaultRun = serve
-}
+import "github.com/openteam/server/internal/cli"
 
 func main() {
-	cmd.Execute()
-}
-
-func serve() {
-	cfg, err := config.Load()
-	if err != nil {
-		log.Fatalf("config: %v", err)
-	}
-
-	a, err := app.New(cfg)
-	if err != nil {
-		log.Fatalf("app init: %v", err)
-	}
-	defer a.Shutdown(context.Background())
-
-	gw := proxy.NewGateway(a.DB, a.Enc, a.Usage, a.Limit, cfg.RateLimit.UserRPS, cfg.Proxy.LogRaw)
-	router := api.NewRouter(a, gw)
-
-	srv := &http.Server{
-		Addr:              ":" + strconv.Itoa(cfg.Port),
-		Handler:           router,
-		ReadHeaderTimeout: 10 * time.Second,
-	}
-
-	go func() {
-		log.Printf("openteam listening on %s (env=%s)", srv.Addr, cfg.Env)
-		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
-			log.Fatalf("server: %v", err)
-		}
-	}()
-
-	quit := make(chan os.Signal, 1)
-	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
-	<-quit
-
-	log.Println("shutting down...")
-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
-	defer cancel()
-	if err := srv.Shutdown(ctx); err != nil {
-		log.Printf("server shutdown: %v", err)
-	}
-	a.Usage.Close()
-}
+	cli.Execute()
+}

server/internal/cli/reset_admin.go

@@ -1,5 +1,5 @@
-// Package cmd 命令行入口。
-package cmd
+// Package cli 命令行入口。
+package cli
 
 import (
 	"crypto/rand"
@@ -175,4 +175,4 @@ func randomPassword(n int) (string, error) {
 		buf[i] = pwAlphabet[k.Int64()]
 	}
 	return string(buf), nil
-}
+}

server/internal/cli/root.go

@@ -1,13 +1,10 @@
-// Package cmd 命令行入口（Cobra 子命令分发）。
-package cmd
+// Package cli 命令行入口（Cobra 子命令分发）。
+package cli
 
 import (
 	"github.com/spf13/cobra"
 )
 
-// DefaultRun 无子命令时的默认行为（由 main 注入服务启动函数）。
-var DefaultRun func()
-
 // Execute 启动根命令。
 func Execute() {
 	cobra.CheckErr(rootCmd.Execute())
@@ -23,11 +20,7 @@ var rootCmd = &cobra.Command{
 
 子命令：
   reset-admin-password  重置管理员密码（交互式，无参数时自动提示）`,
-	Run: func(c *cobra.Command, args []string) {
-		if DefaultRun != nil {
-			DefaultRun()
-		} else {
-			_ = c.Help()
-		}
+	RunE: func(c *cobra.Command, args []string) error {
+		return serve()
 	},
-}
+}

server/internal/cli/serve.go

@@ -0,0 +1,62 @@
+// Package cli 命令行入口。
+package cli
+
+import (
+	"context"
+	"errors"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"strconv"
+	"syscall"
+	"time"
+
+	"github.com/openteam/server/internal/api"
+	"github.com/openteam/server/internal/app"
+	"github.com/openteam/server/internal/config"
+	"github.com/openteam/server/internal/proxy"
+)
+
+// serve 启动 HTTP 服务（默认子命令）。
+func serve() error {
+	cfg, err := config.Load()
+	if err != nil {
+		return err
+	}
+
+	a, err := app.New(cfg)
+	if err != nil {
+		return err
+	}
+	defer a.Shutdown(context.Background())
+
+	gw := proxy.NewGateway(a.DB, a.Enc, a.Usage, a.Limit, cfg.RateLimit.UserRPS, cfg.Proxy.LogRaw)
+	router := api.NewRouter(a, gw)
+
+	srv := &http.Server{
+		Addr:              ":" + strconv.Itoa(cfg.Port),
+		Handler:           router,
+		ReadHeaderTimeout: 10 * time.Second,
+	}
+
+	go func() {
+		log.Printf("openteam listening on %s (env=%s)", srv.Addr, cfg.Env)
+		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+			log.Fatalf("server: %v", err)
+		}
+	}()
+
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+
+	log.Println("shutting down...")
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	if err := srv.Shutdown(ctx); err != nil {
+		log.Printf("server shutdown: %v", err)
+	}
+	a.Usage.Close()
+	return nil
+}