feat(messaging): implement optimistic updates with retry for failed messages

- Add pending/failed message status to track send state
- Implement optimistic UI: show message immediately, update on server response
- Add retry functionality for failed messages via tap-to-retry
- Change send button from icon to text "发送" for clarity
- Add MessageSendService with temp ID generation to prevent collisions

feat(notification): add JPush notification deduplication and clear on tap

- Deduplicate notificationArrived events from dual JPush/vendor channels
- Clear all notifications on tap (QQ-style behavior)

feat(post): add client-side idempotency key for post creation

- Generate client_request_id per publish intent to prevent duplicates on retry
- Pass idempotency key through to postService and voteService

src/screens/message/components/ChatScreen/useChatScreen.ts

@@ -153,6 +153,7 @@ export const useChatScreen = (props?: ChatScreenProps) => {
     loadMoreMessages,
     refreshMessages,
     sendMessage: sendMessageViaManager,
+    retrySendMessage: retrySendMessageViaManager,
     isSending: isSendingViaManager,
     markAsRead,
     conversation,
@@ -1056,7 +1057,7 @@ export const useChatScreen = (props?: ChatScreenProps) => {
     return segments;
   }, []);
 
-  // 【新架构】发送消息（支持纯文字、纯多图、图文同条）
+  // 【新架构】发送消息（支持纯文字、纯多图、图文同条）- 乐观更新模式
   const handleSend = useCallback(async () => {
     const trimmedText = inputText.trim();
     const hasPending = pendingAttachments.length > 0;
@@ -1082,6 +1083,7 @@ export const useChatScreen = (props?: ChatScreenProps) => {
       }
     }
 
+    // 图片需要先上传（这个无法乐观，因为需要URL）
     const uploadedUrls: string[] = [];
     if (hasPending) {
       setUploadingAttachments(true);
@@ -1108,60 +1110,60 @@ export const useChatScreen = (props?: ChatScreenProps) => {
       }
     }
 
-    setSending(true);
+    // 构建消息段
+    const segments: MessageSegment[] = (trimmedText || replyingTo)
+      ? [...buildTextSegments(trimmedText, replyingTo)]
+      : [];
+    for (const url of uploadedUrls) {
+      segments.push({
+        type: 'image',
+        data: {
+          url,
+          thumbnail_url: url,
+        } as ImageSegmentData,
+      });
+    }
 
+    if (segments.length === 0) {
+      Alert.alert('无法发送', '消息内容为空');
+      return;
+    }
+
+    // 乐观更新：立即清空输入框并滚动到底部
+    const savedReplyTo = replyingTo;
+    setInputText('');
+    setSelectedMentions([]);
+    setMentionAll(false);
+    setReplyingTo(null);
+    setPendingAttachments([]);
+
+    // 立即滚动到底部显示新消息
+    setTimeout(() => {
+      scrollToLatest(false, false, hasPending ? 'send-mixed' : 'send-text');
+    }, 50);
+
+    // 后台发送消息（私聊与群聊统一走 MessageSendService 的乐观更新）：
+    // 1. 立即在 store 中插入 pending 临时消息
+    // 2. 成功 → 替换为正式消息、更新会话 last_message、写入本地数据库
+    // 3. 失败 → 标记为 failed，供用户点击重试
     try {
-      // 有文本或回复时才构建文本段，纯图片时不塞空 text
-      const segments: MessageSegment[] = (trimmedText || replyingTo)
-        ? [...buildTextSegments(trimmedText, replyingTo)]
-        : [];
-      for (const url of uploadedUrls) {
-        segments.push({
-          type: 'image',
-          data: {
-            url,
-            thumbnail_url: url,
-          } as ImageSegmentData,
-        });
-      }
-
-      if (segments.length === 0) {
-        Alert.alert('无法发送', '消息内容为空');
-        return;
-      }
-
-      if (isGroupChat && effectiveGroupId) {
-        await messageService.sendMessageByAction('group', conversationId, segments);
-
-        setInputText('');
-        setSelectedMentions([]);
-        setMentionAll(false);
-        setReplyingTo(null);
-        setPendingAttachments([]);
-      } else {
-        await sendMessageViaManager(segments);
-        setInputText('');
-        setSelectedMentions([]);
-        setMentionAll(false);
-        setReplyingTo(null);
-        setPendingAttachments([]);
-      }
-
-      setTimeout(() => {
-        scrollToLatest(false, false, hasPending ? 'send-mixed' : 'send-text');
-      }, 100);
+      await sendMessageViaManager(segments, {
+        replyToId: savedReplyTo?.id,
+        detailType: isGroupChat ? 'group' : 'private',
+      });
     } catch (error) {
       console.error('发送消息失败:', error);
-      Alert.alert('发送失败', getSendErrorMessage(error, '消息发送失败，请重试'));
-    } finally {
-      setSending(false);
+      // MessageSendService 已将消息置为 failed 并在 UI 上显示状态，
+      // 这里仅弹窗提示用户（与原行为保持一致）。
+      if (isGroupChat) {
+        Alert.alert('发送失败', getSendErrorMessage(error, '消息发送失败，请重试'));
+      }
     }
   }, [
     inputText,
     pendingAttachments,
     conversationId,
     isGroupChat,
-    effectiveGroupId,
     sendMessageViaManager,
     isMuted,
     muteAll,
@@ -1173,6 +1175,21 @@ export const useChatScreen = (props?: ChatScreenProps) => {
     scrollToLatest,
   ]);
 
+  // 重试发送失败的消息（点击「发送失败」气泡时触发）
+  // 仅对当前用户自己发送且状态为 failed 的消息生效；
+  // 重试期间消息会先变为 pending（发送中），再根据结果转为 normal/failed。
+  const handleRetrySend = useCallback(async (message: GroupMessage) => {
+    if (!conversationId) return;
+    if (message.sender_id !== currentUserId) return;
+    if (message.status !== 'failed') return;
+    try {
+      await retrySendMessageViaManager(message);
+    } catch (error) {
+      console.error('重试发送消息失败:', error);
+      Alert.alert('发送失败', getSendErrorMessage(error, '消息发送失败，请重试'));
+    }
+  }, [conversationId, currentUserId, retrySendMessageViaManager, getSendErrorMessage]);
+
   // 选择图片（多选进入输入框待发送，点发送时与文字一并发出）
   const handlePickImage = useCallback(async () => {
     if (pendingAttachments.length >= MAX_PENDING_CHAT_IMAGES) {
@@ -1636,6 +1653,7 @@ export const useChatScreen = (props?: ChatScreenProps) => {
     shouldShowTime,
     handleInputChange,
     handleSend,
+    handleRetrySend,
     removePendingAttachment,
     handleMoreAction,
     handleInsertEmoji,