refactor: 重构 Space 页面为统一多 Tab 布局 + 移除独立关注/粉丝子页面

- 后端：SpaceController 支持 5 个 Tab（文章/关注/粉丝/收藏/设置），统一处理本人与访客视图
- 后端：注入 FavoriteService 支持收藏夹 Tab，新增用户统计数据查询
- 后端：新增 PUT /api/space/privacy 隐私设置 API 端点
- 后端：移除 FollowPageController 及 /space/:uid/followers|following 路由
- 前端：完全重写 space/index.html，顶部信息栏 + Tab 导航 + 左侧栏 + 主内容区
- 前端：重写 space.css 适配新布局（Profile Header/Tab Bar/文章/收藏/设置）
- 清理：删除独立的 follow HTML 模板和 CSS 文件
- 模型：User 表新增 follower_list_public 隐私字段

internal/router/api.go

@@ -176,6 +176,15 @@ func setupAPIRoutes(r *gin.Engine, cfg *config.Config, d *dependencies) {
 		favToggleAPI.POST("/favorite", d.favoriteCtrl.ToggleFavorite)
 	}
 
+	// --- 空间/隐私设置 API（需登录） ---
+	spaceAPI := r.Group("/api/space")
+	spaceAPI.Use(d.authMdw.Required())
+	spaceAPI.Use(d.authMdw.BannedWriteGuard())
+	spaceAPI.Use(middleware.CSRF(cfg))
+	{
+		spaceAPI.PUT("/privacy", d.spaceCtrl.UpdatePrivacy)
+	}
+
 	// --- Studio 趋势 API（需登录） ---
 	trendsAPI := r.Group("/api/studio")
 	trendsAPI.Use(d.authMdw.Required())

internal/router/deps_core.go

@@ -39,7 +39,6 @@ type dependencies struct {
 	adminCommentCtrl *adminCtrl.AdminCommentController
 	reactionCtrl    *controller.ReactionController
 	followCtrl      *controller.FollowController
-	followPageCtrl  *controller.FollowPageController
 	favoriteCtrl    *controller.FavoriteController
 	favoriteService *service.FavoriteService
 	trendsService   *service.TrendsService

internal/router/deps_extra.go

@@ -80,17 +80,17 @@ func buildDeps(db *gorm.DB, cfg *config.Config, siteSettings *config.SiteSetting
 	followService := service.NewFollowService(db, followRepo)
 	followService.SetNotifier(notificationService) // 关注通知
 	followCtrl := controller.NewFollowController(followService)
-	followPageCtrl := controller.NewFollowPageController(followService)
+
+	// 收藏夹系统（需在 SpaceController 之前初始化）
+	favoriteRepo := repository.NewFavoriteRepo(db)
+	favoriteService := service.NewFavoriteService(db, favoriteRepo)
+	favoriteCtrl := controller.NewFavoriteController(favoriteService)
 
 	// 用户空间
 	spaceService := service.NewSpaceService(userRepo, postRepo)
 	spaceCtrl := controller.NewSpaceController(spaceService)
 	spaceCtrl.WithFollowService(followService)
-
-	// 收藏夹系统
-	favoriteRepo := repository.NewFavoriteRepo(db)
-	favoriteService := service.NewFavoriteService(db, favoriteRepo)
-	favoriteCtrl := controller.NewFavoriteController(favoriteService)
+	spaceCtrl.WithFavoriteService(favoriteService)
 
 	// Studio 趋势图
 	trendsService := service.NewTrendsService(energyRepo, commentRepo, reactionRepo, favoriteRepo)
@@ -115,7 +115,6 @@ func buildDeps(db *gorm.DB, cfg *config.Config, siteSettings *config.SiteSetting
 		adminCommentCtrl: adminCommentCtrl,
 		reactionCtrl:    reactionCtrl,
 		followCtrl:      followCtrl,
-		followPageCtrl:  followPageCtrl,
 		favoriteCtrl:    favoriteCtrl,
 		favoriteService: favoriteService,
 		trendsService:   trendsService,

internal/router/frontend.go

@@ -45,10 +45,6 @@ func setupFrontendRoutes(r *gin.Engine, cfg *config.Config, d *dependencies) {
 		pages.GET("/space", d.spaceCtrl.MySpace)
 		pages.GET("/space/:uid", d.spaceCtrl.ShowSpace)
 
-		// 关注/粉丝列表页
-		pages.GET("/space/:uid/followers", d.followPageCtrl.FollowersPage)
-		pages.GET("/space/:uid/following", d.followPageCtrl.FollowingPage)
-
 		// 帖子页面
 		pages.GET("/posts", d.postCtrl.ListPage)
 		pages.GET("/posts/:id", d.postCtrl.ShowPage)