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>

frontend/app/chat/[id]/ChatRoomClient.tsx

@@ -48,6 +48,7 @@ import { canOverseeChat } from "@/lib/roles";
 import { toast } from "@/lib/toast";
 import { scrollBehavior } from "@/lib/motion";
 import Avatar from "@/components/Avatar";
+import AutolinkText from "@/components/AutolinkText";
 import ConfirmDialog from "@/components/ConfirmDialog";
 import ContextMenu, { type CtxMenuItem } from "@/components/ContextMenu";
 
@@ -56,10 +57,11 @@ const MARK_READ_GAP_MS = 2_000;
 const markReadInflight = new Set<number>();
 const markReadLastAt = new Map<number, number>();
 
-function requestMarkChatRead(roomId: number): void {
+function requestMarkChatRead(roomId: number, opts?: { force?: boolean }): void {
   const now = Date.now();
   const last = markReadLastAt.get(roomId) || 0;
-  if (markReadInflight.has(roomId) || now - last < MARK_READ_GAP_MS) return;
+  if (markReadInflight.has(roomId)) return;
+  if (!opts?.force && now - last < MARK_READ_GAP_MS) return;
   markReadInflight.add(roomId);
   markReadLastAt.set(roomId, now);
   apiMarkChatRead(roomId, 0)
@@ -235,6 +237,17 @@ function highlightMentions(content: string, members: ChatRoomMember[]) {
   return parts;
 }
 
+/** 消息正文：URL 自动识别 + @提及；外链新开跟随站点策略 */
+function renderChatContent(content: string, members: ChatRoomMember[]) {
+  return (
+    <AutolinkText
+      text={content}
+      forceNewTab
+      renderText={(seg) => <>{highlightMentions(seg, members)}</>}
+    />
+  );
+}
+
 /** 输入区镜像层：已确认的 @ 显示为飞书风 token */
 function renderComposerMirror(content: string, tokens: Set<string>) {
   if (!content) return null;
@@ -405,10 +418,13 @@ export default function ChatRoomClient({
     }
   }, [roomId, canView]);
 
-  const markReadToLatest = useCallback(() => {
-    if (!isRealMember) return;
-    requestMarkChatRead(roomId);
-  }, [roomId, isRealMember]);
+  const markReadToLatest = useCallback(
+    (opts?: { force?: boolean }) => {
+      if (!isRealMember) return;
+      requestMarkChatRead(roomId, opts);
+    },
+    [roomId, isRealMember]
+  );
 
   useEffect(() => {
     if (!canView) return;
@@ -563,7 +579,11 @@ export default function ChatRoomClient({
         return [...prev, message];
       });
       requestAnimationFrame(() => scrollToBottom(true));
-      markReadToLatest();
+      // 发送成功立刻同步侧栏预览，并强制推进已读（避开进房 MarkRead 的 2s 节流）
+      window.dispatchEvent(
+        new CustomEvent("j13-chat-sent", { detail: { roomId, message } })
+      );
+      markReadToLatest({ force: true });
     } catch (e) {
       setContent(prevContent);
       setMentionTokens(prevTokens);
@@ -1196,7 +1216,7 @@ export default function ChatRoomClient({
                                 已撤回
                               </div>
                               <div style={{ color: "var(--ink-2)" }}>
-                                {highlightMentions(m.content, members)}
+                                {renderChatContent(m.content, members)}
                               </div>
                             </div>
                           </div>
@@ -1291,7 +1311,7 @@ export default function ChatRoomClient({
                             {m.reply_snap}
                           </button>
                         )}
-                        {highlightMentions(m.content, members)}
+                        {renderChatContent(m.content, members)}
                       </div>
                     </div>
                   </div>