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/styles.ts

@@ -416,6 +416,33 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
   readStatusTextRead: {
     color: colors.chat.success,
   },
+
+  // 发送状态（乐观更新）
+  sendStatusContainer: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    alignSelf: 'flex-end',
+    marginTop: 2,
+    marginRight: 2,
+  },
+  sendStatusRow: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: 2,
+  },
+  sendStatusIndicator: {
+    marginRight: 2,
+  },
+  pendingStatusText: {
+    fontSize: 10,
+    color: colors.chat.textSecondary,
+    fontWeight: '500',
+  },
+  failedStatusText: {
+    fontSize: 10,
+    color: '#FF3B30',
+    fontWeight: '500',
+  },
   
   // 输入框区域 - 与列表背景同色底栏，顶部细分隔
   inputWrapper: {
@@ -489,34 +516,30 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
     transform: [{ translateY: -1 }],
   },
   
-  // 发送按钮 - QQ/微信风格
+  // 发送按钮 - 微信风格文字按钮
   sendButtonActive: {
-    width: 36,
-    height: 36,
-    borderRadius: 18,  // 正圆形
+    minWidth: 56,
+    height: 34,
+    borderRadius: 8,
     backgroundColor: colors.primary.main,
     alignItems: 'center',
     justifyContent: 'center',
-    // 微信风格：轻微阴影，不夸张
+    paddingHorizontal: 12,
+    // 轻微阴影
     shadowColor: colors.primary.main,
     shadowOffset: { width: 0, height: 1 },
     shadowOpacity: 0.2,
-    shadowRadius: 3,
+    shadowRadius: 2,
     elevation: 2,
   },
   sendButtonDisabled: {
     opacity: 0.4,
   },
-  // 发送按钮光泽层（叠加在按钮上模拟渐变）
-  sendButtonShine: {
-    position: 'absolute',
-    top: 0,
-    left: 0,
-    right: 0,
-    height: '50%',
-    borderTopLeftRadius: 18,
-    borderTopRightRadius: 18,
-    backgroundColor: 'rgba(255, 255, 255, 0.08)',
+  sendButtonText: {
+    color: '#FFF',
+    fontSize: 14,
+    fontWeight: '600',
+    letterSpacing: 0.5,
   },
   
   // 输入框