fix(chat): 发送后切会话不再误标未读，管理端撤回实时同步到对话页

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/handler/chat.go

@@ -6,6 +6,7 @@ import (
 	"strconv"
 
 	"github.com/freefire/jiang13-bbs/middleware"
+	"github.com/freefire/jiang13-bbs/model"
 	"github.com/freefire/jiang13-bbs/realtime"
 	"github.com/freefire/jiang13-bbs/service"
 	"github.com/gin-gonic/gin"
@@ -387,26 +388,7 @@ func (h *Handlers) RecallChatMessage(c *gin.Context) {
 		c.JSON(chatErrToStatus(err), gin.H{"error": err.Error()})
 		return
 	}
-	data := gin.H{
-		"id":          msg.ID,
-		"room_id":     roomID,
-		"sender_id":   msg.SenderID,
-		"recalled_by": msg.RecalledBy,
-		"recalled_at": msg.RecalledAt,
-	}
-	if msg.Recaller != nil && msg.Recaller.ID > 0 {
-		data["recaller"] = gin.H{
-			"id":       msg.Recaller.ID,
-			"username": msg.Recaller.Username,
-			"nickname": msg.Recaller.Nickname,
-			"avatar":   msg.Recaller.Avatar,
-			"role":     msg.Recaller.Role,
-		}
-	}
-	h.Hub.BroadcastRoom(realtime.RoomChat(roomID), realtime.Envelope{
-		Type: realtime.EventChatRecalled,
-		Data: data,
-	})
+	h.broadcastChatRecalled(roomID, msg)
 	// 监管者保留正文供界面展示；撤回者本人保留正文供「重新编辑」；其余不回传
 	if !oversee && msg.SenderID != claims.ID {
 		msg.Content = ""
@@ -471,3 +453,80 @@ func (h *Handlers) ChatUnreadSummary(c *gin.Context) {
 	}
 	c.JSON(http.StatusOK, gin.H{"total": total, "rooms": rooms})
 }
+
+// AdminChatMessages 管理端消息监管队列；room_type=group|direct
+func (h *Handlers) AdminChatMessages(c *gin.Context) {
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	q := c.Query("q")
+	roomType := c.Query("room_type")
+	msgs, total, err := h.Chat.AdminListMessages(page, q, roomType)
+	if err != nil {
+		if err.Error() == "房间类型无效" {
+			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+			return
+		}
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "加载聊天消息失败"})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"messages": msgs, "total": total, "page": page})
+}
+
+// AdminRecallChatMessage 管理端撤回群聊消息（staff；监管者可撤任意）
+func (h *Handlers) AdminRecallChatMessage(c *gin.Context) {
+	claims := middleware.CurrentUser(c)
+	roomID, err := strconv.ParseUint(c.Param("roomId"), 10, 64)
+	if err != nil || roomID == 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "房间 ID 无效"})
+		return
+	}
+	mid, err := strconv.ParseUint(c.Param("mid"), 10, 64)
+	if err != nil || mid == 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "消息 ID 无效"})
+		return
+	}
+	oversee := h.chatOversee(claims.ID)
+	// 非监管 staff：仅允许撤回自己发送的（与前台一致）
+	msg, err := h.Chat.RecallMessage(claims.ID, uint(roomID), uint(mid), oversee)
+	if err != nil {
+		c.JSON(chatErrToStatus(err), gin.H{"error": err.Error()})
+		return
+	}
+	h.broadcastChatRecalled(uint(roomID), msg)
+	c.JSON(http.StatusOK, gin.H{
+		"ok": true, "id": msg.ID, "room_id": roomID, "recalled_at": msg.RecalledAt,
+	})
+}
+
+// broadcastChatRecalled 会话内撤回与管理端撤回共用：先落库再推 chat:{roomID}
+func (h *Handlers) broadcastChatRecalled(roomID uint, msg *model.ChatMessage) {
+	if h.Hub == nil || msg == nil {
+		return
+	}
+	data := gin.H{
+		"id":          msg.ID,
+		"room_id":     roomID,
+		"sender_id":   msg.SenderID,
+		"recalled_by": msg.RecalledBy,
+		"recalled_at": msg.RecalledAt,
+	}
+	if msg.Recaller != nil && msg.Recaller.ID > 0 {
+		data["recaller"] = gin.H{
+			"id":       msg.Recaller.ID,
+			"username": msg.Recaller.Username,
+			"nickname": msg.Recaller.Nickname,
+			"avatar":   msg.Recaller.Avatar,
+			"role":     msg.Recaller.Role,
+		}
+	}
+	env := realtime.Envelope{Type: realtime.EventChatRecalled, Data: data}
+	h.Hub.BroadcastRoom(realtime.RoomChat(roomID), env)
+	// 未订阅该房间的成员（侧栏在看别的会话）也需要实时改预览
+	if h.Chat == nil {
+		return
+	}
+	if memberIDs, err := h.Chat.ListMemberIDs(roomID); err == nil {
+		for _, uid := range memberIDs {
+			h.Hub.BroadcastUser(uid, env)
+		}
+	}
+}