feat(moderation): 帖评删除占位感知与硬删清场

管理删帖须填类型与理由并展示专用页；评论软删占位、版主可硬删不占楼。 Co-authored-by: Cursor <cursoragent@cursor.com>
2026-09-16 07:01:04 +08:00
parent 2b27703e6c
commit bcb4f6a603
15 changed files with 825 additions and 116 deletions
--- a/backend/handler/comment.go
+++ b/backend/handler/comment.go
@@ -66,6 +66,13 @@ func (h *Handlers) CreateComment(c *gin.Context) {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的帖子 ID"})
 		return
 	}
+	if allow, err := h.Setting.AllowComments(); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "评论暂时不可用"})
+		return
+	} else if !allow {
+		c.JSON(http.StatusForbidden, gin.H{"error": "站点已关闭评论"})
+		return
+	}
 	var req CreateCommentRequest
 	if err := c.ShouldBindJSON(&req); err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
@@ -99,7 +106,7 @@ func (h *Handlers) CreateComment(c *gin.Context) {
 	c.JSON(http.StatusOK, gin.H{"comment": comment})
 }

-// DeleteComment 删除评论
+// DeleteComment 软删评论（占位）
 func (h *Handlers) DeleteComment(c *gin.Context) {
 	claims := middleware.CurrentUser(c)
 	cid, err := strconv.ParseUint(c.Param("cid"), 10, 64)
@@ -120,3 +127,25 @@ func (h *Handlers) DeleteComment(c *gin.Context) {
 	}
 	c.JSON(http.StatusOK, gin.H{"message": "已删除"})
 }
+
+// PurgeComment 硬删评论及子树（仅版主；不占位）
+func (h *Handlers) PurgeComment(c *gin.Context) {
+	claims := middleware.CurrentUser(c)
+	cid, err := strconv.ParseUint(c.Param("cid"), 10, 64)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的评论 ID"})
+		return
+	}
+	if err := h.Comment.Purge(h.loadActor(claims.ID), uint(cid), claims.ID); err != nil {
+		switch {
+		case errors.Is(err, service.ErrCommentNotFound):
+			c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
+		case errors.Is(err, service.ErrCommentForbidden):
+			c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
+		default:
+			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		}
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"message": "已彻底删除"})
+}
--- a/backend/handler/moderation.go
+++ b/backend/handler/moderation.go
@@ -6,6 +6,7 @@ import (
 	"strconv"

 	"github.com/freefire/jiang13-bbs/middleware"
+	"github.com/freefire/jiang13-bbs/model"
 	"github.com/freefire/jiang13-bbs/service"
 	"github.com/gin-gonic/gin"
 	"gorm.io/gorm"
@@ -118,7 +119,33 @@ func (h *Handlers) AdminListComments(c *gin.Context) {
 }

 func (h *Handlers) AdminSoftDeletePost(c *gin.Context) {
-	h.execContentAction(c, h.Moderation.SoftDeletePost)
+	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
+	if err != nil || id == 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的 ID"})
+		return
+	}
+	var body struct {
+		DeleteType   string `json:"delete_type"`
+		DeleteReason string `json:"delete_reason"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "请提交删除类型与理由"})
+		return
+	}
+	actor := middleware.CurrentActor(c)
+	authorID, err := h.Moderation.SoftDeletePost(actor, uint(id), body.DeleteType, body.DeleteReason)
+	if err != nil {
+		h.writeModerationError(c, err)
+		return
+	}
+	label := model.PostDeleteTypeLabel(body.DeleteType)
+	preview := label
+	if body.DeleteReason != "" {
+		preview = label + "：" + body.DeleteReason
+	}
+	h.Notification.Create(authorID, actor.ID, model.NotificationTypeDeleted, uint(id), 0, preview)
+	h.broadcastModerationChanged()
+	c.JSON(http.StatusOK, gin.H{"message": "操作成功"})
 }

 func (h *Handlers) AdminRestorePost(c *gin.Context) {
@@ -168,7 +195,9 @@ func (h *Handlers) writeModerationError(c *gin.Context, err error) {
 	default:
 		msg := err.Error()
 		if msg == "帖子已在回收站" || msg == "帖子未被删除" ||
-			msg == "评论已在回收站" || msg == "评论未被删除" {
+			msg == "评论已在回收站" || msg == "评论未被删除" ||
+			msg == "无效的删除类型" || msg == "请填写删除理由" ||
+			msg == "删除理由不能超过 200 字" {
 			c.JSON(http.StatusBadRequest, gin.H{"error": msg})
 			return
 		}
--- a/backend/handler/post.go
+++ b/backend/handler/post.go
@@ -361,7 +361,7 @@ func (h *Handlers) DownloadPostAttachment(c *gin.Context) {
 	_ = filepath.Base(path)
 }

-// DeletePost 删除帖子
+// DeletePost 删除帖子（作者自删或 staff 软删；staff 须提交类型与理由）
 func (h *Handlers) DeletePost(c *gin.Context) {
 	claims := middleware.CurrentUser(c)
 	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
@@ -369,10 +369,30 @@ func (h *Handlers) DeletePost(c *gin.Context) {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的帖子 ID"})
 		return
 	}
-	if err := h.Post.Delete(h.loadActor(claims.ID), uint(id), claims.ID); err != nil {
+	var body struct {
+		DeleteType   string `json:"delete_type"`
+		DeleteReason string `json:"delete_reason"`
+	}
+	_ = c.ShouldBindJSON(&body)
+
+	staffDeleted, authorID, err := h.Post.Delete(
+		h.loadActor(claims.ID),
+		uint(id),
+		claims.ID,
+		service.DeletePostOpts{DeleteType: body.DeleteType, DeleteReason: body.DeleteReason},
+	)
+	if err != nil {
 		respondPostModError(c, err)
 		return
 	}
+	if staffDeleted {
+		label := model.PostDeleteTypeLabel(body.DeleteType)
+		preview := label
+		if body.DeleteReason != "" {
+			preview = label + "：" + body.DeleteReason
+		}
+		h.Notification.Create(authorID, claims.ID, model.NotificationTypeDeleted, uint(id), 0, preview)
+	}
 	c.JSON(http.StatusOK, gin.H{"message": "已删除"})
 }

--- a/backend/model/models.go
+++ b/backend/model/models.go
@@ -177,6 +177,10 @@ type Post struct {
 	ViewCount     int            `gorm:"default:0" json:"view_count"`
 	CommentCount  int            `gorm:"default:0" json:"comment_count"`
 	Liked         bool           `gorm:"-" json:"liked"` // 当前用户是否已点赞（展示字段，不入库）
+	// 软删元数据：列表仍排除；详情 Unscoped 可读作 tombstone 页
+	DeleteType    string         `gorm:"size:32;default:''" json:"delete_type,omitempty"`
+	DeleteReason  string         `gorm:"size:256;default:''" json:"delete_reason,omitempty"`
+	DeletedBy     uint           `gorm:"not null;default:0" json:"deleted_by,omitempty"` // 执行删除者；与 UserID 不同即为管理删除
 	CreatedAt     time.Time      `json:"created_at"`
 	UpdatedAt     time.Time      `json:"updated_at"`
 	DeletedAt     gorm.DeletedAt `gorm:"index" json:"-"`
@@ -185,6 +189,43 @@ type Post struct {
 	User  User  `gorm:"foreignKey:UserID" json:"user,omitempty"`
 }

+// 帖子管理删除类型（staff 软删必填）
+const (
+	PostDeleteTypeSpam      = "spam"
+	PostDeleteTypeViolation = "violation"
+	PostDeleteTypeOffTopic  = "off_topic"
+	PostDeleteTypeDuplicate = "duplicate"
+	PostDeleteTypeOther     = "other"
+)
+
+// ValidPostDeleteType 管理删帖类型白名单
+func ValidPostDeleteType(t string) bool {
+	switch t {
+	case PostDeleteTypeSpam, PostDeleteTypeViolation, PostDeleteTypeOffTopic,
+		PostDeleteTypeDuplicate, PostDeleteTypeOther:
+		return true
+	}
+	return false
+}
+
+// PostDeleteTypeLabel 类型中文标签（通知/专用页）
+func PostDeleteTypeLabel(t string) string {
+	switch t {
+	case PostDeleteTypeSpam:
+		return "垃圾广告"
+	case PostDeleteTypeViolation:
+		return "违规内容"
+	case PostDeleteTypeOffTopic:
+		return "灌水跑题"
+	case PostDeleteTypeDuplicate:
+		return "重复内容"
+	case PostDeleteTypeOther:
+		return "其他"
+	default:
+		return ""
+	}
+}
+
 // PointLedger 积分流水（余额以 User.Points 为准，本表可审计）
 type PointLedger struct {
 	ID        uint      `gorm:"primaryKey" json:"id"`
@@ -302,6 +343,7 @@ const (
 	NotificationTypeRejected      = "rejected"       // 内容审核未通过
 	NotificationTypeMention       = "mention"        // 群聊中 @ 了你（PostID=0，用 RoomID/MessageID）
 	NotificationTypePendingReview = "pending_review" // 有新内容待审核（发给可审者）
+	NotificationTypeDeleted       = "deleted"        // 帖子被管理员删除
 )

 // Notification 站内通知
--- a/backend/router/router.go
+++ b/backend/router/router.go
@@ -151,6 +151,7 @@ func Setup(cfg *config.Config) (*gin.Engine, error) {
 		api.POST("/posts/:id/like", h.ToggleLike)
 		api.POST("/posts/:id/comments", middleware.RateLimitMiddleware(limiter, service.RateComment), h.CreateComment)
 		api.DELETE("/posts/:id/comments/:cid", h.DeleteComment)
+		api.DELETE("/posts/:id/comments/:cid/purge", h.PurgeComment)
 		// 通知
 		api.GET("/notifications", h.Notifications)
 		api.GET("/notifications/unread-count", h.UnreadCount)
--- a/backend/service/admin_content.go
+++ b/backend/service/admin_content.go
@@ -303,16 +303,38 @@ func (s *ModerationService) loadCommentUnscoped(actor *Actor, id uint) (*model.C
 	return &cm, post.BoardID, nil
 }

-// SoftDeletePost 软删帖子（未删除时）
-func (s *ModerationService) SoftDeletePost(actor *Actor, id uint) error {
+// SoftDeletePost 软删帖子（未删除时）；须填写删除类型与理由，并通知作者
+func (s *ModerationService) SoftDeletePost(actor *Actor, id uint, deleteType, deleteReason string) (authorID uint, err error) {
 	post, err := s.loadPostUnscoped(actor, id)
 	if err != nil {
-		return err
+		return 0, err
 	}
 	if post.DeletedAt.Valid {
-		return errors.New("帖子已在回收站")
+		return 0, errors.New("帖子已在回收站")
 	}
-	return s.db.Delete(post).Error
+	deleteType = strings.TrimSpace(deleteType)
+	deleteReason = strings.TrimSpace(deleteReason)
+	if !model.ValidPostDeleteType(deleteType) {
+		return 0, errors.New("无效的删除类型")
+	}
+	if deleteReason == "" {
+		return 0, errors.New("请填写删除理由")
+	}
+	if len([]rune(deleteReason)) > 200 {
+		return 0, errors.New("删除理由不能超过 200 字")
+	}
+	updates := map[string]interface{}{
+		"delete_type":   deleteType,
+		"delete_reason": deleteReason,
+		"deleted_by":    actor.ID,
+	}
+	if err := s.db.Model(post).Updates(updates).Error; err != nil {
+		return 0, err
+	}
+	if err := s.db.Delete(post).Error; err != nil {
+		return 0, err
+	}
+	return post.UserID, nil
 }

 // RestorePost 从回收站恢复帖子
--- a/backend/service/comment.go
+++ b/backend/service/comment.go
@@ -27,6 +27,7 @@ func NewCommentService(db *gorm.DB) *CommentService {
 // CommentNode 评论树节点：嵌入 model.Comment 使 JSON 字段拍平，replies 为空时省略
 type CommentNode struct {
 	model.Comment
+	Deleted bool          `json:"deleted,omitempty"` // 软删占位
 	Replies []CommentNode `json:"replies,omitempty"`
 }

@@ -35,8 +36,8 @@ const maxReplyDepth = 10

 // ListFloorPaged 楼层分页获取帖子评论树：
 // 分页与楼层号只针对主评论（parent_id IS NULL），每楼附带全部子评论（时间正序）。
-// viewer 可为作者本人或该板可审者时并入 pending；游客仅 published。
-// 返回：树根列表、楼层数、全部评论数（含回复）。
+// 已软删评论以 tombstone 占位（计入楼层）；已硬删不存在。
+// totalComments 仅计未删条数（头部徽章）；floors 含 tombstone 主评。
 func (s *CommentService) ListFloorPaged(postID, boardID, viewerID uint, actor *Actor, page, size int) ([]CommentNode, int64, int64, error) {
 	if page < 1 {
 		page = 1
@@ -44,18 +45,23 @@ func (s *CommentService) ListFloorPaged(postID, boardID, viewerID uint, actor *A
 	if size < 1 || size > 100 {
 		size = 20
 	}
-	base := applyCommentListVisibility(s.db.Model(&model.Comment{}).Where("post_id = ?", postID), boardID, viewerID, actor)
+	// Unscoped：把软删行一并纳入，供占位展示
+	base := applyCommentListVisibility(
+		s.db.Unscoped().Model(&model.Comment{}).Where("post_id = ?", postID),
+		boardID, viewerID, actor,
+	)

 	var floors, totalComments int64
 	if err := base.Session(&gorm.Session{}).
 		Where("parent_id IS NULL").Count(&floors).Error; err != nil {
 		return nil, 0, 0, err
 	}
-	if err := base.Session(&gorm.Session{}).Count(&totalComments).Error; err != nil {
+	// 徽章：仅未软删
+	if err := base.Session(&gorm.Session{}).
+		Where("deleted_at IS NULL").Count(&totalComments).Error; err != nil {
 		return nil, 0, 0, err
 	}

-	// 1. 本页楼层（主评论）
 	var roots []model.Comment
 	if err := base.Session(&gorm.Session{}).
 		Where("parent_id IS NULL").
@@ -70,19 +76,17 @@ func (s *CommentService) ListFloorPaged(postID, boardID, viewerID uint, actor *A
 		return []CommentNode{}, floors, totalComments, nil
 	}

-	// 2. 一次拉齐本页全部楼层的所有回复（root_id 冗余，免递归查询）
 	rootIDs := make([]uint, len(roots))
 	for i, r := range roots {
 		rootIDs[i] = r.ID
 	}
-	replyQ := applyCommentListVisibility(s.db.Where("root_id IN (?)", rootIDs), boardID, viewerID, actor)
+	replyQ := applyCommentListVisibility(s.db.Unscoped().Where("root_id IN (?)", rootIDs), boardID, viewerID, actor)
 	var replies []model.Comment
 	if err := replyQ.Order("created_at ASC").Preload("User").Find(&replies).Error; err != nil {
 		return nil, 0, 0, err
 	}

-	// 3. 组装树：按 parent_id 建索引递归构造；父缺失（已删/脏数据）时降级挂到所属楼层根部
-	children := make(map[uint][]model.Comment, len(replies)) // parentID -> 直接子评论（时间正序）
+	children := make(map[uint][]model.Comment, len(replies))
 	for _, r := range replies {
 		if r.ParentID != nil {
 			children[*r.ParentID] = append(children[*r.ParentID], r)
@@ -93,24 +97,23 @@ func (s *CommentService) ListFloorPaged(postID, boardID, viewerID uint, actor *A
 	build = func(pid uint) []CommentNode {
 		out := []CommentNode{}
 		for _, c := range children[pid] {
-			out = append(out, CommentNode{Comment: c, Replies: build(c.ID)})
+			out = append(out, toCommentNode(c, build(c.ID)))
 			placed[c.ID] = true
 		}
 		return out
 	}
 	result := make([]CommentNode, len(roots))
 	for i := range roots {
-		result[i] = CommentNode{Comment: roots[i], Replies: build(roots[i].ID)}
+		result[i] = toCommentNode(roots[i], build(roots[i].ID))
 		placed[roots[i].ID] = true
 	}
-	// 防御性兜底：父评论不在树中的回复 → 挂到所属楼层根部，保证不丢内容
 	for _, r := range replies {
 		if placed[r.ID] || r.RootID == nil {
 			continue
 		}
 		for i := range result {
 			if result[i].ID == *r.RootID {
-				result[i].Replies = append(result[i].Replies, CommentNode{Comment: r, Replies: build(r.ID)})
+				result[i].Replies = append(result[i].Replies, toCommentNode(r, build(r.ID)))
 				break
 			}
 		}
@@ -118,17 +121,38 @@ func (s *CommentService) ListFloorPaged(postID, boardID, viewerID uint, actor *A
 	return result, floors, totalComments, nil
 }

-// applyCommentListVisibility 评论流可见性：published，或 pending 且（作者 / 该板可审）
+// toCommentNode 软删行清空正文与用户展示信息，标 deleted
+func toCommentNode(c model.Comment, replies []CommentNode) CommentNode {
+	if !c.DeletedAt.Valid {
+		return CommentNode{Comment: c, Replies: replies}
+	}
+	c.Content = ""
+	c.User = model.User{}
+	return CommentNode{Comment: c, Deleted: true, Replies: replies}
+}
+
+// applyCommentListVisibility 评论流可见性：published，或 pending 且（作者 / 该板可审）；
+// 软删行：已发布的对所有人占位；待审软删仅作者/可审者可见占位。
 func applyCommentListVisibility(db *gorm.DB, boardID, viewerID uint, actor *Actor) *gorm.DB {
+	pub := model.ContentStatusPublished
+	pend := model.ContentStatusPending
 	if viewerID == 0 || actor == nil {
-		return db.Where("status = ?", model.ContentStatusPublished)
+		return db.Where(
+			"(deleted_at IS NULL AND status = ?) OR (deleted_at IS NOT NULL AND status = ?)",
+			pub, pub,
+		)
 	}
 	if actor.CanModerateBoard(boardID) {
-		return db.Where("status IN ?", []string{model.ContentStatusPublished, model.ContentStatusPending})
+		return db.Where(
+			"(deleted_at IS NULL AND status IN ?) OR (deleted_at IS NOT NULL AND status IN ?)",
+			[]string{pub, pend}, []string{pub, pend},
+		)
 	}
 	return db.Where(
-		"status = ? OR (status = ? AND user_id = ?)",
-		model.ContentStatusPublished, model.ContentStatusPending, viewerID,
+		`(deleted_at IS NULL AND (status = ? OR (status = ? AND user_id = ?)))
+		 OR (deleted_at IS NOT NULL AND (status = ? OR (status = ? AND user_id = ?)))`,
+		pub, pend, viewerID,
+		pub, pend, viewerID,
 	)
 }

@@ -241,14 +265,12 @@ func (s *CommentService) CountByUser(userID uint) (int64, error) {
 	return total, err
 }

-// Delete 删除评论（作者本人，或对帖子所属板块有审核权的管理成员），
-// 级联软删整棵子树
+// Delete 软删单条评论（作者本人或板块审核权），不级联子树；占位保留楼层。
 func (s *CommentService) Delete(actor *Actor, commentID, userID uint) error {
 	var comment model.Comment
 	if err := s.db.First(&comment, commentID).Error; err != nil {
 		return ErrCommentNotFound
 	}
-	// 权限校验：作者本人或板块审核权
 	if comment.UserID != userID {
 		var post model.Post
 		if err := s.db.Select("id", "board_id").First(&post, comment.PostID).Error; err != nil {
@@ -258,12 +280,23 @@ func (s *CommentService) Delete(actor *Actor, commentID, userID uint) error {
 			return ErrCommentForbidden
 		}
 	}
-	// 收集子树：取同楼层全部评论，多轮标记出以目标为祖先的集合（含自身，深度有限必然收敛）
+	if err := s.db.Delete(&comment).Error; err != nil {
+		return err
+	}
+	if comment.Status == model.ContentStatusPublished {
+		s.db.Model(&model.Post{}).Where("id = ?", comment.PostID).
+			UpdateColumn("comment_count", gorm.Expr("GREATEST(comment_count - 1, 0)"))
+	}
+	return nil
+}
+
+// collectDescendantIDs 收集以 root 为根的子树 ID（含自身）
+func (s *CommentService) collectDescendantIDs(comment model.Comment) []uint {
 	var all []model.Comment
 	if comment.RootID != nil {
-		s.db.Where("root_id = ?", *comment.RootID).Find(&all)
+		s.db.Unscoped().Where("root_id = ?", *comment.RootID).Find(&all)
 	} else {
-		s.db.Where("root_id = ?", comment.ID).Find(&all)
+		s.db.Unscoped().Where("root_id = ? OR id = ?", comment.ID, comment.ID).Find(&all)
 	}
 	descendants := map[uint]bool{comment.ID: true}
 	for i := 0; i <= maxReplyDepth; i++ {
@@ -285,27 +318,37 @@ func (s *CommentService) Delete(actor *Actor, commentID, userID uint) error {
 	for id := range descendants {
 		ids = append(ids, id)
 	}
-	// 只有已发布评论曾计入 comment_count，递减时排除待审/被拒评论。
-	// all 含同楼层全部子评论（删除主评论时目标自身不在 all 内，需单独计入）
-	publishedCnt := 0
-	if comment.Status == model.ContentStatusPublished {
-		publishedCnt++
+	return ids
+}
+
+// Purge 硬删评论及子树（仅板块审核权）；不占位；对尚未软删的已发布条递减 comment_count。
+func (s *CommentService) Purge(actor *Actor, commentID, userID uint) error {
+	var comment model.Comment
+	if err := s.db.Unscoped().First(&comment, commentID).Error; err != nil {
+		return ErrCommentNotFound
 	}
-	for _, c := range all {
-		if c.ID == comment.ID {
-			continue
+	var post model.Post
+	if err := s.db.Select("id", "board_id").First(&post, comment.PostID).Error; err != nil {
+		return ErrCommentNotFound
 	}
-		if descendants[c.ID] && c.Status == model.ContentStatusPublished {
-			publishedCnt++
+	if actor == nil || !actor.CanModerateBoard(post.BoardID) {
+		return ErrCommentForbidden
 	}
-	}
-	// 软删子树并按已发布条数递减帖子评论数
-	if err := s.db.Delete(&model.Comment{}, ids).Error; err != nil {
+	_ = userID
+
+	ids := s.collectDescendantIDs(comment)
+	// 仅对「尚未软删」的已发布评论减计数（软删时已减过）
+	var livePublished int64
+	s.db.Model(&model.Comment{}).
+		Where("id IN ? AND status = ? AND deleted_at IS NULL", ids, model.ContentStatusPublished).
+		Count(&livePublished)
+
+	if err := s.db.Unscoped().Delete(&model.Comment{}, ids).Error; err != nil {
 		return err
 	}
-	if publishedCnt > 0 {
+	if livePublished > 0 {
 		s.db.Model(&model.Post{}).Where("id = ?", comment.PostID).
-			UpdateColumn("comment_count", gorm.Expr("GREATEST(comment_count - ?, 0)", publishedCnt))
+			UpdateColumn("comment_count", gorm.Expr("GREATEST(comment_count - ?, 0)", livePublished))
 	}
 	return nil
 }
--- a/backend/service/post.go
+++ b/backend/service/post.go
@@ -14,6 +14,8 @@ import (
 var (
 	ErrPostNotFound     = errors.New("帖子不存在")
 	ErrPostForbidden    = errors.New("无权限操作此帖子")
+	ErrPostDeleteMeta   = errors.New("管理删除须填写类型与理由")
+	ErrPostInvalidType  = errors.New("无效的删除类型")
 )

 // PostService 帖子服务
@@ -384,6 +386,13 @@ type PostDetail struct {
 	Poll          *PollState          `json:"poll,omitempty"`
 	Bounty        *BountyState        `json:"bounty,omitempty"`
 	Lottery       *LotteryState       `json:"lottery,omitempty"`
+	// 软删 tombstone：列表不可见，详情专用页可读
+	Tombstone    bool       `json:"tombstone,omitempty"`
+	DeleteType   string     `json:"delete_type,omitempty"`
+	DeleteReason string     `json:"delete_reason,omitempty"`
+	DeletedBy    uint       `json:"deleted_by,omitempty"`
+	StaffDeleted bool       `json:"staff_deleted,omitempty"`
+	DeletedAt    *time.Time `json:"deleted_at,omitempty"`
 }

 // CreatePostInput 发帖入参
@@ -412,12 +421,24 @@ type UpdatePostInput struct {
 	AttachmentIDs *[]uint // nil=不改附件；非 nil=替换列表
 }

-// GetByIDForViewer 获取帖子详情（带状态可见性 + 正文访问控制）
+// GetByIDForViewer 获取帖子详情（带状态可见性 + 正文访问控制）。
+// 已软删帖返回 tombstone（无正文/附件）；已硬删或不存在返回 ErrPostNotFound。
 func (s *PostService) GetByIDForViewer(id, viewerID uint, loadActor func() *Actor) (*PostDetail, error) {
 	var post model.Post
-	if err := s.db.Preload("Board").Preload("User").First(&post, id).Error; err != nil {
+	err := s.db.Preload("Board").Preload("User").First(&post, id).Error
+	if err != nil {
+		if !errors.Is(err, gorm.ErrRecordNotFound) {
 			return nil, ErrPostNotFound
 		}
+		// 默认 scope 找不到：尝试软删行 → tombstone
+		if err := s.db.Unscoped().Preload("Board").Preload("User").First(&post, id).Error; err != nil {
+			return nil, ErrPostNotFound
+		}
+		if !post.DeletedAt.Valid {
+			return nil, ErrPostNotFound
+		}
+		return buildPostTombstone(&post), nil
+	}
 	if !visibleToPost(&post, viewerID, loadActor) {
 		return nil, ErrPostNotFound
 	}
@@ -448,6 +469,34 @@ func (s *PostService) GetByIDForViewer(id, viewerID uint, loadActor func() *Acto
 	return detail, nil
 }

+func buildPostTombstone(post *model.Post) *PostDetail {
+	var deletedAt *time.Time
+	if post.DeletedAt.Valid {
+		t := post.DeletedAt.Time
+		deletedAt = &t
+	}
+	staffDeleted := post.DeletedBy != 0 && post.DeletedBy != post.UserID
+	return &PostDetail{
+		ID:           post.ID,
+		BoardID:      post.BoardID,
+		UserID:       post.UserID,
+		Title:        post.Title,
+		PostType:     model.NormalizePostType(post.PostType),
+		Status:       post.Status,
+		CreatedAt:    post.CreatedAt,
+		UpdatedAt:    post.UpdatedAt,
+		Board:        post.Board,
+		User:         post.User,
+		Attachments:  []PostAttachmentDTO{},
+		Tombstone:    true,
+		DeleteType:   post.DeleteType,
+		DeleteReason: post.DeleteReason,
+		DeletedBy:    post.DeletedBy,
+		StaffDeleted: staffDeleted,
+		DeletedAt:    deletedAt,
+	}
+}
+
 func buildPostDetail(post *model.Post) *PostDetail {
 	return &PostDetail{
 		ID: post.ID, BoardID: post.BoardID, UserID: post.UserID,
@@ -954,17 +1003,53 @@ func (s *PostService) checkNewUserCooldown(userID uint) error {
 	return nil
 }

-// Delete 删除帖子（作者本人，或对该板块有审核权的管理成员）
-func (s *PostService) Delete(actor *Actor, postID, userID uint) error {
+// DeletePostOpts 删帖选项：staff 软删必填类型与理由；作者自删传零值
+type DeletePostOpts struct {
+	DeleteType   string
+	DeleteReason string
+}
+
+// Delete 删除帖子（作者本人，或对该板块有审核权的管理成员）。
+// staff 删除他人帖必须提供合法类型与非空理由；作者自删不写类型/理由。
+// 返回 staffDeleted 与作者 ID，供 handler 发通知。
+func (s *PostService) Delete(actor *Actor, postID, userID uint, opts DeletePostOpts) (staffDeleted bool, authorID uint, err error) {
 	var post model.Post
 	if err := s.db.First(&post, postID).Error; err != nil {
-		return ErrPostNotFound
+		return false, 0, ErrPostNotFound
 	}
-	if post.UserID != userID && !actor.CanModerateBoard(post.BoardID) {
-		return ErrPostForbidden
+	authorID = post.UserID
+
+	deleteType := ""
+	deleteReason := ""
+	if post.UserID == userID {
+		staffDeleted = false
+	} else if actor != nil && actor.CanModerateBoard(post.BoardID) {
+		deleteType = strings.TrimSpace(opts.DeleteType)
+		deleteReason = strings.TrimSpace(opts.DeleteReason)
+		if !model.ValidPostDeleteType(deleteType) {
+			return false, authorID, ErrPostInvalidType
+		}
+		if deleteReason == "" {
+			return false, authorID, ErrPostDeleteMeta
+		}
+		if len([]rune(deleteReason)) > 200 {
+			return false, authorID, errors.New("删除理由不能超过 200 字")
+		}
+		staffDeleted = true
+	} else {
+		return false, authorID, ErrPostForbidden
+	}
+
+	updates := map[string]interface{}{
+		"delete_type":   deleteType,
+		"delete_reason": deleteReason,
+		"deleted_by":    userID,
+	}
+	if err := s.db.Model(&post).Updates(updates).Error; err != nil {
+		return false, authorID, err
 	}
 	if err := s.db.Delete(&post).Error; err != nil {
-		return err
+		return false, authorID, err
 	}
-	return nil
+	return staffDeleted, authorID, nil
 }
--- a/frontend/app/admin/content/ContentAdmin.tsx
+++ b/frontend/app/admin/content/ContentAdmin.tsx
@@ -34,6 +34,7 @@ import { formatRelative } from "@/lib/format";
 import { toast } from "@/lib/toast";
 import Avatar from "@/components/Avatar";
 import ConfirmDialog from "@/components/ConfirmDialog";
+import StaffDeletePostModal from "@/components/StaffDeletePostModal";

 const PAGE_SIZE = 15;

@@ -139,6 +140,8 @@ export default function ContentAdmin({
    run: () => Promise<void>;
  } | null>(null);
  const [confirmBusy, setConfirmBusy] = useState(false);
+  const [staffDeletePost, setStaffDeletePost] = useState<AdminContentPost | null>(null);
+  const [staffDeleteBusy, setStaffDeleteBusy] = useState(false);

  const refreshCounts = useCallback(() => {
    apiAdminContentCounts().then(setCounts).catch(() => {});
@@ -515,18 +518,7 @@ export default function ContentAdmin({
                      type="button"
                      className="btn btn-line btn-sm"
                      disabled={busy}
-                      onClick={() =>
-                        askConfirm(
-                          "移入回收站",
-                          `确定软删帖子「${p.title}」吗？可稍后在「已删除」中恢复。`,
-                          () =>
-                            apiAdminSoftDeletePost(p.id).then(() => {
-                              toast("已移入回收站", "ok");
-                              reload(postsPage);
-                            }),
-                          true
-                        )
-                      }
+                      onClick={() => setStaffDeletePost(p)}
                    >
                      <Trash2 size={14} /> 删除
                    </button>
@@ -691,6 +683,25 @@ export default function ContentAdmin({
            });
        }}
      />
+
+      <StaffDeletePostModal
+        open={!!staffDeletePost}
+        title={staffDeletePost?.title}
+        busy={staffDeleteBusy}
+        onClose={() => !staffDeleteBusy && setStaffDeletePost(null)}
+        onConfirm={(opts) => {
+          if (!staffDeletePost) return;
+          setStaffDeleteBusy(true);
+          apiAdminSoftDeletePost(staffDeletePost.id, opts)
+            .then(() => {
+              toast("已移入回收站", "ok");
+              setStaffDeletePost(null);
+              reload(postsPage);
+            })
+            .catch((e) => toast(e instanceof Error ? e.message : "操作失败"))
+            .finally(() => setStaffDeleteBusy(false));
+        }}
+      />
    </div>
  );
 }
--- a/frontend/app/notifications/NotificationsClient.tsx
+++ b/frontend/app/notifications/NotificationsClient.tsx
@@ -76,7 +76,7 @@ export default function NotificationsClient({ initialData }: { initialData: Noti
            const approval = n.type === "approved" || n.type === "rejected";
            const iconNode = n.type === "approved"
              ? <CheckCircle2 size={16} />
-              : n.type === "rejected"
+              : n.type === "rejected" || n.type === "deleted"
                ? <XCircle size={16} />
                : n.type === "like"
                  ? <Heart size={16} />
@@ -87,14 +87,14 @@ export default function NotificationsClient({ initialData }: { initialData: Noti
                      : <MessageCircle size={16} />;
            const iconColor = n.type === "approved"
              ? "var(--ok)"
-              : n.type === "rejected"
+              : n.type === "rejected" || n.type === "deleted"
                ? "var(--danger)"
                : n.type === "like"
                  ? "var(--clay)"
                  : "var(--accent)";
            const iconBg = n.type === "approved"
              ? "var(--ok-soft)"
-              : n.type === "rejected"
+              : n.type === "rejected" || n.type === "deleted"
                ? "var(--danger-soft)"
                : n.type === "like"
                  ? "var(--clay-soft)"
@@ -143,6 +143,8 @@ export default function NotificationsClient({ initialData }: { initialData: Noti
                              ? "在消息中提到了你"
                              : n.type === "pending_review"
                                ? "有新内容待审核"
+                                : n.type === "deleted"
+                                  ? "删除了你的帖子"
                                  : "点赞了你的帖子"}
                      </span>
                    </>
--- a/frontend/app/post/[id]/page.tsx
+++ b/frontend/app/post/[id]/page.tsx
@@ -18,12 +18,13 @@ import {
  fetchComments,
  fetchPosts,
  fetchUserProfile,
+  postDeleteTypeLabel,
  type UserProfile,
  type PostListItem,
  type Board,
 } from "@/lib/api";
 import { authCookieHeader } from "@/lib/cookies";
-import { getMeCached } from "@/lib/serverData";
+import { getMeCached, getPublicSettingsCached } from "@/lib/serverData";
 import CommentSection from "@/components/CommentSection";
 import PostActions from "@/components/PostActions";
 import LikeButton from "@/components/LikeButton";
@@ -50,9 +51,16 @@ export async function generateMetadata({ params }: PageProps): Promise<Metadata>
  try {
    // 带登录态：作者/管理团队看待审帖时标签标题也应是真实标题而非"帖子不存在"
    const { post } = await fetchPostDetail(id, authCookieHeader(await cookies()));
+    if (post.tombstone) {
+      return {
+        title: post.title || "帖子已删除",
+        description: "该帖子已被删除",
+        robots: { index: false, follow: false },
+      };
+    }
    const desc = post.content_locked
      ? post.access_hint || "部分内容需满足条件后可见"
-      : post.content.slice(0, 160);
+      : (post.content || "").slice(0, 160);
    return {
      title: post.title,
      description: desc,
@@ -383,10 +391,63 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
    notFound();
  }

-  // 评论 / 当前用户 / 作者资料 / 同板块热议并行拉取；侧栏数据失败一律静默降级，不阻塞正文
-  const [commentsData, me, profile, relatedData] = await Promise.all([
+  // 软删专用页：列表已不可见，原链接展示删除说明
+  if (post.tombstone) {
+    const typeLabel = postDeleteTypeLabel(post.delete_type);
+    return (
+      <div className="max-w-lg mx-auto py-16 px-4 text-center">
+        <p
+          className="inline-flex items-center rounded-full px-3 py-1 text-[12px] font-semibold mb-4"
+          style={{ background: "var(--danger-soft)", color: "var(--danger)" }}
+        >
+          帖子已删除
+        </p>
+        <h1 className="text-[20px] sm:text-[22px] font-extrabold mb-3" style={{ color: "var(--ink)" }}>
+          {post.title || "（无标题）"}
+        </h1>
+        {post.staff_deleted ? (
+          <div
+            className="panel text-left p-5 sm:p-6 mt-2"
+            style={{ borderColor: "var(--danger-soft)" }}
+          >
+            <p className="text-[14px] font-medium mb-3" style={{ color: "var(--ink)" }}>
+              此帖已被管理员删除
+            </p>
+            {typeLabel && (
+              <p className="text-[13px] mb-2" style={{ color: "var(--ink-2)" }}>
+                <span style={{ color: "var(--ink-3)" }}>类型：</span>
+                {typeLabel}
+              </p>
+            )}
+            {post.delete_reason && (
+              <p className="text-[13px] leading-relaxed" style={{ color: "var(--ink-2)" }}>
+                <span style={{ color: "var(--ink-3)" }}>理由：</span>
+                {post.delete_reason}
+              </p>
+            )}
+          </div>
+        ) : (
+          <p className="meta text-[14px] mt-2">作者已删除此帖</p>
+        )}
+        <div className="mt-8 flex items-center justify-center gap-3">
+          <Link href="/" className="btn btn-line btn-sm">
+            返回首页
+          </Link>
+          {post.board?.id ? (
+            <Link href={`/?board=${post.board_id}`} className="btn btn-primary btn-sm">
+              浏览板块
+            </Link>
+          ) : null}
+        </div>
+      </div>
+    );
+  }
+
+  // 评论 / 当前用户 / 站点设置 / 作者资料 / 同板块热议并行拉取；侧栏数据失败一律静默降级，不阻塞正文
+  const [commentsData, me, siteSettings, profile, relatedData] = await Promise.all([
    fetchComments(id, commentPage, cookie),
    getMeCached(cookie || undefined),
+    getPublicSettingsCached(),
    fetchUserProfile(String(post.user.id), 1, cookie).catch(() => null),
    fetchPosts(1, 8, post.board_id, "recommended", "", false, cookie).catch(() => null),
  ]);
@@ -554,6 +615,7 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
                    pinned={post.pinned}
                    recommended={post.recommended}
                    status={post.status}
+                    title={post.title}
                  />
                </div>

@@ -659,6 +721,7 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
                page={commentsData.page}
                size={commentsData.size}
                user={me.user}
+                allowComments={siteSettings.allow_comments}
                acceptMode={acceptMode}
                acceptedCommentId={
                  post.question?.accepted_comment_id ||
--- a/frontend/components/CommentSection.tsx
+++ b/frontend/components/CommentSection.tsx
@@ -1,12 +1,21 @@
 "use client";

-import { useRef, useState } from "react";
+import { useEffect, useRef, useState } from "react";
 import { useRouter } from "next/navigation";
 import Link from "next/link";
-import { Trash2, MessagesSquare, ChevronRight, ChevronDown, BadgeCheck, XCircle } from "lucide-react";
+import {
+  Trash2,
+  MessagesSquare,
+  MessageSquareOff,
+  ChevronRight,
+  ChevronDown,
+  BadgeCheck,
+  XCircle,
+} from "lucide-react";
 import {
  apiCreateComment,
  apiDeleteComment,
+  apiPurgeComment,
  apiAcceptBounty,
  apiAcceptQuestion,
  apiAdminApproveComment,
@@ -16,6 +25,7 @@ import {
 } from "@/lib/api";
 import { canModerateBoard } from "@/lib/roles";
 import { toast } from "@/lib/toast";
+import { realtime, RT_SETTINGS_CHANGED, type RtSettingsData } from "@/lib/realtime";
 import Avatar from "./Avatar";
 import Pagination from "./Pagination";
 import MarkdownBodyClient from "@/components/MarkdownBodyClient";
@@ -37,6 +47,8 @@ interface CommentSectionProps {
  /** 悬赏或问答：可采纳时在评论旁显示采纳按钮（二者按帖子类型二选一） */
  acceptMode?: "bounty" | "question" | null;
  acceptedCommentId?: number;
+  /** 全站是否开放评论；缺省 true。关闭时隐藏发评/回复入口 */
+  allowComments?: boolean;
 }

 // 删除按钮的两段式确认：点一下进入确认态，3 秒未确认自动复原
@@ -59,6 +71,7 @@ export default function CommentSection({
  user,
  acceptMode = null,
  acceptedCommentId = 0,
+  allowComments: allowCommentsProp = true,
 }: CommentSectionProps) {
  const router = useRouter();
  const [content, setContent] = useState("");
@@ -72,13 +85,33 @@ export default function CommentSection({
  const [approvingId, setApprovingId] = useState<number | null>(null);
  const [rejectTargetId, setRejectTargetId] = useState<number | null>(null);
  const [rejecting, setRejecting] = useState(false);
+  const [purgeTargetId, setPurgeTargetId] = useState<number | null>(null);
+  const [purging, setPurging] = useState(false);
  // 折叠状态：哪些楼层展开了子回复（默认全部折叠，SSR 初始为收起）
  const [expandedFloors, setExpandedFloors] = useState<Set<number>>(new Set());
+  const [commentsOpen, setCommentsOpen] = useState(allowCommentsProp !== false);
  const textareaRef = useRef<HTMLTextAreaElement>(null);

+  useEffect(() => {
+    setCommentsOpen(allowCommentsProp !== false);
+  }, [allowCommentsProp]);
+
+  // 管理后台开关变更后即时隐藏发评入口（后端仍硬拒绝）
+  useEffect(() => {
+    return realtime.on<RtSettingsData>(RT_SETTINGS_CHANGED, (data) => {
+      if (typeof data?.allow_comments === "boolean") {
+        setCommentsOpen(data.allow_comments);
+        if (!data.allow_comments) {
+          setReplyTarget(null);
+          setReplyContent("");
+        }
+      }
+    });
+  }, []);
+
  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
-    if (!content.trim()) return;
+    if (!commentsOpen || !content.trim()) return;
    setSubmitting(true);
    try {
      const res = await apiCreateComment(postId, content);
@@ -105,7 +138,7 @@ export default function CommentSection({

  const handleSubmitReply = async (e: React.FormEvent) => {
    e.preventDefault();
-    if (!replyTarget || !replyContent.trim()) return;
+    if (!commentsOpen || !replyTarget || !replyContent.trim()) return;
    setSubmitting(true);
    try {
      const res = await apiCreateComment(postId, replyContent, replyTarget.id);
@@ -204,19 +237,47 @@ export default function CommentSection({
    }
  };

+  const handlePurgeConfirm = async () => {
+    if (purgeTargetId == null) return;
+    setPurging(true);
+    try {
+      const res = await apiPurgeComment(postId, purgeTargetId);
+      if (res.message) {
+        toast("已彻底删除", "ok");
+        setPurgeTargetId(null);
+        router.refresh();
+      } else {
+        toast(res.error || "彻底删除失败");
+      }
+    } catch (e) {
+      toast(e instanceof Error ? e.message : "彻底删除失败");
+    } finally {
+      setPurging(false);
+    }
+  };
+
  // 引用功能已移除：与"回复"功能重叠，且会割裂讨论上下文（抖音风格无此功能）

-  const canDelete = (comment: CommentNode) =>
-    !!user && (user.id === comment.user.id || canModerateBoard(user, boardId));
+  const canSoftDelete = (comment: CommentNode) =>
+    !comment.deleted &&
+    !!user &&
+    (user.id === comment.user?.id || canModerateBoard(user, boardId));
+
+  const canPurge = (comment: CommentNode) =>
+    !!user && canModerateBoard(user, boardId);

  const canApprove = (comment: CommentNode) =>
-    !!user && comment.status === "pending" && canModerateBoard(user, boardId);
+    !comment.deleted &&
+    !!user &&
+    comment.status === "pending" &&
+    canModerateBoard(user, boardId);

  const canAccept = (comment: CommentNode) =>
+    !comment.deleted &&
    !!acceptMode &&
    !!user &&
    comment.status === "published" &&
-    comment.user.id !== authorId;
+    comment.user?.id !== authorId;

  const openReply = (c: CommentNode) => {
    setReplyTarget({ id: c.id, nickname: c.user.nickname || c.user.username });
@@ -235,8 +296,8 @@ export default function CommentSection({

  const totalPages = Math.max(1, Math.ceil(total / size));

-  // 内联回复表单（出现在目标评论正下方）
-  const inlineReplyForm = replyTarget && (
+  // 内联回复表单（出现在目标评论正下方；全站关评时不渲染）
+  const inlineReplyForm = commentsOpen && replyTarget && (
    <form onSubmit={handleSubmitReply} className="cmt-reply-form mt-3">
      <div className="text-[12px] mb-2" style={{ color: "var(--ink-3)" }}>
        回复 <span style={{ color: "var(--accent)" }}>@{replyTarget.nickname}</span>
@@ -285,7 +346,104 @@ export default function CommentSection({
    const replyCount = countReplies(node);
    const isFloor = depth === 0;
    const isExpanded = isFloor ? expandedFloors.has(c.id) : true;
-    const parentAuthor = parent?.user.nickname || parent?.user.username;
+    const parentAuthor = parent?.user?.nickname || parent?.user?.username;
+
+    // 软删占位：保留楼层/回复位，不展示正文；子回复仍可展开
+    if (c.deleted) {
+      const tombstoneBody = (
+        <div
+          className="rounded-lg px-3 py-2.5 text-[13px]"
+          style={{
+            background: "var(--panel-2)",
+            color: "var(--ink-3)",
+            border: "1px dashed var(--line)",
+          }}
+        >
+          此评论已删除
+        </div>
+      );
+      const purgeBtn = canPurge(c) && (
+        <button
+          type="button"
+          className="cmt-reply-btn !text-[var(--danger)]"
+          disabled={purging}
+          onClick={() => setPurgeTargetId(c.id)}
+          data-tip="彻底删除，不占位"
+        >
+          彻底删除
+        </button>
+      );
+
+      if (!isFloor) {
+        return (
+          <div key={c.id} id={`comment-${c.id}`} className="cmt-reply-row scroll-mt-24 opacity-80">
+            <div className="flex gap-2.5">
+              <span className="shrink-0 w-7 h-7 rounded-full" style={{ background: "var(--line)" }} aria-hidden />
+              <div className="flex-1 min-w-0">
+                {tombstoneBody}
+                <div className="flex items-center gap-3 mt-1.5">
+                  <span className="meta text-[11.5px]">{new Date(c.created_at).toLocaleString("zh-CN")}</span>
+                  {purgeBtn}
+                </div>
+              </div>
+            </div>
+            {node.replies && node.replies.length > 0 && (
+              <div className="cmt-children">
+                {node.replies.map((r) => renderComment(r, depth + 1, undefined, node))}
+              </div>
+            )}
+          </div>
+        );
+      }
+
+      return (
+        <div
+          key={c.id}
+          id={`comment-${c.id}`}
+          className="py-5 border-t first:border-t-0 scroll-mt-24 opacity-90"
+          style={{ borderColor: "var(--line)" }}
+        >
+          <div className="flex gap-3">
+            <span className="shrink-0 w-[38px] h-[38px] rounded-full mt-0.5" style={{ background: "var(--line)" }} aria-hidden />
+            <div className="flex-1 min-w-0">
+              <div className="flex items-center gap-2.5 mb-1.5">
+                <span className="text-sm" style={{ color: "var(--ink-3)" }}>
+                  已删除
+                </span>
+                {floor && (
+                  <a href={`#comment-${c.id}`} className="cmt-floor-label" aria-label={`楼层 ${floor}`}>
+                    #{floor}
+                  </a>
+                )}
+              </div>
+              {tombstoneBody}
+              <div className="flex items-center gap-3 mt-2">
+                <span className="meta text-[11.5px]">{new Date(c.created_at).toLocaleString("zh-CN")}</span>
+                {purgeBtn}
+              </div>
+              {node.replies && node.replies.length > 0 && (
+                <div className="mt-3">
+                  <button
+                    type="button"
+                    onClick={() => toggleFloor(c.id)}
+                    className="cmt-fold-btn"
+                    aria-expanded={isExpanded}
+                  >
+                    {isExpanded ? <ChevronDown size={14} /> : <ChevronRight size={14} />}
+                    <span>{isExpanded ? "收起回复" : `展开 ${replyCount} 条回复`}</span>
+                  </button>
+                  {isExpanded && (
+                    <div className="cmt-replies-wrap">
+                      {node.replies.map((r) => renderComment(r, 1, undefined, node))}
+                    </div>
+                  )}
+                </div>
+              )}
+            </div>
+          </div>
+        </div>
+      );
+    }

    if (!isFloor) {
      // 子回复：紧凑行式布局（抖音风格）
@@ -323,7 +481,7 @@ export default function CommentSection({
              <div className="flex items-center justify-between mt-1.5">
                <div className="flex items-center gap-3">
                  <span className="meta text-[11.5px]">{new Date(c.created_at).toLocaleString("zh-CN")}</span>
-                  {user && (
+                  {commentsOpen && user && (
                    <button
                      onClick={() => openReply(c)}
                      className={`cmt-reply-btn transition-colors ${
@@ -374,7 +532,7 @@ export default function CommentSection({
                    </>
                  )}
                </div>
-                {canDelete(c) && (
+                {canSoftDelete(c) && (
                  <button
                    onClick={() => handleDelete(c.id)}
                    disabled={deletingId === c.id}
@@ -382,17 +540,27 @@ export default function CommentSection({
                      confirmingId === c.id ? "!text-[var(--danger)]" : "hover:text-[var(--danger)]"
                    }`}
                    aria-label={confirmingId === c.id ? "再次点击确认删除" : "删除评论"}
-                    data-tip={confirmingId === c.id ? "再点一次确认删除" : "删除"}
+                    data-tip={confirmingId === c.id ? "再点一次确认删除（占位）" : "删除（占位）"}
                  >
                    {confirmingId === c.id ? (
-                      <span className="text-[11.5px] whitespace-nowrap">
-                        确认删除?{countReplies(c) > 0 && `（含 ${countReplies(c)} 条回复）`}
-                      </span>
+                      <span className="text-[11.5px] whitespace-nowrap">确认删除?</span>
                    ) : (
                      <Trash2 size={14} />
                    )}
                  </button>
                )}
+                {canPurge(c) && (
+                  <button
+                    type="button"
+                    onClick={() => setPurgeTargetId(c.id)}
+                    disabled={purging}
+                    className="meta p-1 hover:text-[var(--danger)] transition-colors"
+                    data-tip="彻底删除，不占位"
+                    aria-label="彻底删除"
+                  >
+                    <XCircle size={14} />
+                  </button>
+                )}
              </div>
              {replyTarget?.id === c.id && inlineReplyForm}
            </div>
@@ -440,7 +608,7 @@ export default function CommentSection({
            <div className="flex items-center justify-between mt-2">
              <div className="flex items-center gap-3">
                <span className="meta text-[11.5px]">{new Date(c.created_at).toLocaleString("zh-CN")}</span>
-                {user && (
+                {commentsOpen && user && (
                  <button
                    onClick={() => openReply(c)}
                    className={`cmt-reply-btn transition-colors ${
@@ -491,7 +659,7 @@ export default function CommentSection({
                  </>
                )}
              </div>
-              {canDelete(c) && (
+              {canSoftDelete(c) && (
                <button
                  onClick={() => handleDelete(c.id)}
                  disabled={deletingId === c.id}
@@ -499,17 +667,27 @@ export default function CommentSection({
                    confirmingId === c.id ? "!text-[var(--danger)]" : "hover:text-[var(--danger)]"
                  }`}
                  aria-label={confirmingId === c.id ? "再次点击确认删除" : "删除评论"}
-                  data-tip={confirmingId === c.id ? "再点一次确认删除" : "删除"}
+                  data-tip={confirmingId === c.id ? "再点一次确认删除（占位）" : "删除（占位）"}
                >
                  {confirmingId === c.id ? (
-                    <span className="text-[11.5px] whitespace-nowrap">
-                      确认删除?{countReplies(c) > 0 && `（含 ${countReplies(c)} 条回复）`}
-                    </span>
+                    <span className="text-[11.5px] whitespace-nowrap">确认删除?</span>
                  ) : (
                    <Trash2 size={14} />
                  )}
                </button>
              )}
+              {canPurge(c) && (
+                <button
+                  type="button"
+                  onClick={() => setPurgeTargetId(c.id)}
+                  disabled={purging}
+                  className="meta p-1 hover:text-[var(--danger)] transition-colors"
+                  data-tip="彻底删除，不占位"
+                  aria-label="彻底删除"
+                >
+                  <XCircle size={14} />
+                </button>
+              )}
            </div>
            {replyTarget?.id === c.id && inlineReplyForm}

@@ -555,7 +733,34 @@ export default function CommentSection({
        <span className="meta ml-auto text-[11.5px]">共 {totalPages} 页楼层</span>
      </div>

-      {user ? (
+      {!commentsOpen ? (
+        <div
+          className="mb-8 rounded-2xl border px-5 py-6 text-center sm:px-6"
+          style={{
+            borderColor: "color-mix(in srgb, var(--ink-3) 35%, var(--line))",
+            background:
+              "repeating-linear-gradient(-45deg, transparent, transparent 6px, color-mix(in srgb, var(--ink-3) 8%, transparent) 6px, color-mix(in srgb, var(--ink-3) 8%, transparent) 7px), var(--panel-2)",
+          }}
+          role="status"
+        >
+          <span
+            className="mx-auto mb-3 flex h-11 w-11 items-center justify-center rounded-xl"
+            style={{
+              background: "color-mix(in srgb, var(--ink-3) 14%, transparent)",
+              color: "var(--ink-3)",
+            }}
+            aria-hidden
+          >
+            <MessageSquareOff size={22} />
+          </span>
+          <p className="text-[15px] font-semibold" style={{ color: "var(--ink)" }}>
+            评论功能暂时关闭
+          </p>
+          <p className="meta mt-1.5 text-[12.5px] leading-relaxed">
+            站点当前暂停发表新评论与回复，历史评论仍可浏览。
+          </p>
+        </div>
+      ) : user ? (
        <form onSubmit={handleSubmit} className="mb-8">
          <textarea
            ref={textareaRef}
@@ -602,7 +807,9 @@ export default function CommentSection({
            <p className="text-sm" style={{ color: "var(--ink-2)" }}>
              暂无评论
            </p>
-            <p className="meta text-[12.5px] mt-1">来说两句，抢占沙发</p>
+            <p className="meta text-[12.5px] mt-1">
+              {commentsOpen ? "来说两句，抢占沙发" : "评论开放后即可参与讨论"}
+            </p>
          </div>
        )}
      </div>
@@ -621,6 +828,19 @@ export default function CommentSection({
          if (!rejecting) setRejectTargetId(null);
        }}
      />
+
+      <ConfirmDialog
+        open={purgeTargetId != null}
+        title="彻底删除评论"
+        message="将从数据库永久删除此评论及其全部子回复，不保留占位、不可恢复。刷屏垃圾请用此操作。"
+        confirmLabel="彻底删除"
+        danger
+        busy={purging}
+        onConfirm={handlePurgeConfirm}
+        onCancel={() => {
+          if (!purging) setPurgeTargetId(null);
+        }}
+      />
    </section>
  );
 }
--- a/frontend/components/NotificationBell.tsx
+++ b/frontend/components/NotificationBell.tsx
@@ -133,15 +133,17 @@ export default function NotificationBell({ initialUnread = 0 }: { initialUnread?
    if (n.type === "rejected") return "未通过审核";
    if (n.type === "mention") return "在消息中提到了你";
    if (n.type === "pending_review") return "有新内容待审核";
+    if (n.type === "deleted") return "删除了你的帖子";
    return "点赞了你的帖子";
  };

  // 审核结果类通知：无互动对象语义，使用专用图标与语义色
-  const isApproval = (n: NotificationItem) => n.type === "approved" || n.type === "rejected";
+  const isApproval = (n: NotificationItem) =>
+    n.type === "approved" || n.type === "rejected" || n.type === "deleted";
  const iconStyle = (n: NotificationItem): { color: string; bg: string; node: React.ReactNode } => {
    if (n.type === "approved")
      return { color: "var(--ok)", bg: "var(--ok-soft)", node: <CheckCircle2 size={15} /> };
-    if (n.type === "rejected")
+    if (n.type === "rejected" || n.type === "deleted")
      return { color: "var(--danger)", bg: "var(--danger-soft)", node: <XCircle size={15} /> };
    if (n.type === "like")
      return { color: "var(--clay)", bg: "var(--clay-soft)", node: <Heart size={15} /> };
--- a/frontend/components/PostActions.tsx
+++ b/frontend/components/PostActions.tsx
@@ -8,6 +8,7 @@ import { apiMe, apiDeletePost, apiTogglePin, apiToggleRecommend, apiAdminApprove
 import { canModerateBoard, isAdminOrAbove } from "@/lib/roles";
 import { toast } from "@/lib/toast";
 import ConfirmDialog from "@/components/ConfirmDialog";
+import StaffDeletePostModal from "@/components/StaffDeletePostModal";

 interface PostActionsProps {
  postId: string;
@@ -17,6 +18,8 @@ interface PostActionsProps {
  recommended: boolean;
  /** 帖子审核状态：pending 时对可审者显示「通过评审」 */
  status: string;
+  /** 供删除确认展示 */
+  title?: string;
 }

 export default function PostActions({
@@ -26,6 +29,7 @@ export default function PostActions({
  pinned,
  recommended,
  status,
+  title,
 }: PostActionsProps) {
  const router = useRouter();
  const [user, setUser] = useState<User | null>(null);
@@ -35,6 +39,7 @@ export default function PostActions({
  const [isRecommended, setIsRecommended] = useState(recommended);
  const [acting, setActing] = useState(false);
  const [confirmDelete, setConfirmDelete] = useState(false);
+  const [staffDeleteOpen, setStaffDeleteOpen] = useState(false);
  const menuRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
@@ -43,7 +48,6 @@ export default function PostActions({
      .catch(() => setUser(null));
  }, []);

-  // 点击外部 / Esc 关闭菜单（与通知铃铛同一交互模式）
  useEffect(() => {
    if (!open) return;
    const onDown = (e: MouseEvent) => {
@@ -60,17 +64,20 @@ export default function PostActions({
    };
  }, [open]);

-  // 作者本人或有该板块审核权的管理团队可管理；置顶/加精仅管理员及以上
  const canManage = !!user && (user.id === authorId || canModerateBoard(user, boardId));
  const isAdmin = !!user && isAdminOrAbove(user.role);
  const canApprove = !!user && status === "pending" && canModerateBoard(user, boardId);
+  // staff 删他人帖：走类型+理由；作者自删：简单确认
+  const staffDeletingOther =
+    !!user && user.id !== authorId && canModerateBoard(user, boardId);

-  const handleDelete = async () => {
+  const runDelete = async (opts?: { delete_type?: string; delete_reason?: string }) => {
    setDeleting(true);
    try {
-      const res = await apiDeletePost(postId);
+      const res = await apiDeletePost(postId, opts);
      if (res.message) {
        setConfirmDelete(false);
+        setStaffDeleteOpen(false);
        router.push("/");
        toast("帖子已删除", "ok");
      } else {
@@ -217,7 +224,8 @@ export default function PostActions({
            role="menuitem"
            onClick={() => {
              setOpen(false);
-              setConfirmDelete(true);
+              if (staffDeletingOther) setStaffDeleteOpen(true);
+              else setConfirmDelete(true);
            }}
            disabled={deleting}
            className={`${itemCls} items-center`}
@@ -232,13 +240,21 @@ export default function PostActions({
      <ConfirmDialog
        open={confirmDelete}
        title="删除帖子"
-        message="确定要删除这篇帖子吗？此操作不可恢复。"
+        message="确定要删除这篇帖子吗？列表将不再展示，打开原链接会提示已删除。"
        confirmLabel="确认删除"
        danger
        busy={deleting}
-        onConfirm={handleDelete}
+        onConfirm={() => void runDelete()}
        onCancel={() => setConfirmDelete(false)}
      />
+
+      <StaffDeletePostModal
+        open={staffDeleteOpen}
+        title={title}
+        busy={deleting}
+        onClose={() => setStaffDeleteOpen(false)}
+        onConfirm={(opts) => void runDelete(opts)}
+      />
    </div>
  );
 }
--- a/frontend/components/StaffDeletePostModal.tsx
+++ b/frontend/components/StaffDeletePostModal.tsx
@@ -0,0 +1,124 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import Modal from "@/components/Modal";
+import { POST_DELETE_TYPES } from "@/lib/api";
+
+/**
+ * Staff 软删帖：必填删除类型 + 理由。
+ * 作者自删仍用 ConfirmDialog，不走此组件。
+ */
+export default function StaffDeletePostModal({
+  open,
+  title,
+  busy,
+  onClose,
+  onConfirm,
+}: {
+  open: boolean;
+  /** 帖子标题，展示在说明里 */
+  title?: string;
+  busy?: boolean;
+  onClose: () => void;
+  onConfirm: (opts: { delete_type: string; delete_reason: string }) => void;
+}) {
+  const [deleteType, setDeleteType] = useState("spam");
+  const [reason, setReason] = useState("");
+  const [err, setErr] = useState("");
+
+  useEffect(() => {
+    if (open) {
+      setDeleteType("spam");
+      setReason("");
+      setErr("");
+    }
+  }, [open]);
+
+  if (!open) return null;
+
+  const submit = () => {
+    const r = reason.trim();
+    if (!r) {
+      setErr("请填写删除理由");
+      return;
+    }
+    if ([...r].length > 200) {
+      setErr("删除理由不能超过 200 字");
+      return;
+    }
+    onConfirm({ delete_type: deleteType, delete_reason: r });
+  };
+
+  return (
+    <Modal
+      open
+      title="删除帖子"
+      description={
+        title
+          ? `将删除「${title}」。列表不再展示；原链接会显示删除类型与理由。`
+          : "列表不再展示；原链接会显示删除类型与理由。"
+      }
+      onClose={onClose}
+      busy={busy}
+      maxWidthClass="max-w-[440px]"
+      panelClassName="p-5"
+      ariaLabel="删除帖子"
+      footer={
+        <>
+          <button type="button" className="btn btn-line" onClick={onClose} disabled={busy}>
+            取消
+          </button>
+          <button type="button" className="btn btn-danger" onClick={submit} disabled={busy}>
+            {busy ? "删除中…" : "确认删除"}
+          </button>
+        </>
+      }
+    >
+      <p className="mb-2 text-[12.5px]" style={{ color: "var(--ink)" }}>
+        删除类型
+      </p>
+      <div className="flex flex-col gap-1.5 mb-4" role="radiogroup" aria-label="删除类型">
+        {POST_DELETE_TYPES.map((t) => {
+          const active = deleteType === t.value;
+          return (
+            <button
+              key={t.value}
+              type="button"
+              role="radio"
+              aria-checked={active}
+              onClick={() => setDeleteType(t.value)}
+              className="text-left rounded-lg px-3 py-2 text-[13px] transition-colors"
+              style={{
+                border: `1.5px solid ${active ? "var(--accent)" : "var(--line)"}`,
+                background: active ? "var(--accent-soft)" : "var(--panel-2)",
+                color: active ? "var(--accent)" : "var(--ink)",
+              }}
+            >
+              {t.label}
+            </button>
+          );
+        })}
+      </div>
+      <label className="block mb-1.5 text-[12.5px]" style={{ color: "var(--ink)" }} htmlFor="delete-reason">
+        删除理由 <span style={{ color: "var(--danger)" }}>*</span>
+      </label>
+      <textarea
+        id="delete-reason"
+        className="field"
+        rows={3}
+        value={reason}
+        onChange={(e) => {
+          setReason(e.target.value);
+          setErr("");
+        }}
+        placeholder="将展示在帖子专用页与作者通知中"
+        maxLength={200}
+      />
+      {err && (
+        <p className="mt-2 text-[12px]" style={{ color: "var(--danger)" }}>
+          {err}
+        </p>
+      )}
+    </Modal>
+  );
+}