feat(message): add conversation notification mute feature

Add notification mute functionality for conversations with the following changes:

- Add notification_muted field to ConversationResponse and related DTOs
- Add notificationMutedMap to message store for tracking mute state
- Add setConversationNotificationMuted API method
- Integrate mute toggle in GroupInfoScreen and PrivateChatInfoScreen
- Skip system notifications for muted conversations
- Suppress vibration for muted conversations in WS handler
- Clean up selected mentions when @mentions are removed from text

Chore changes:
- Update PostCard bookmark icon from 'bookmark' to 'star'
- Refine card styles across AppsScreen, MaterialsScreen, and SubjectMaterialsScreen
- Improve week selector scrolling to center selected week in ScheduleScreen

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

@@ -705,8 +705,25 @@ export const useChatScreen = (props?: ChatScreenProps) => {
       } else {
         setActivePanel('none');
       }
+
+      if (selectedMentions.length > 0) {
+        const stillPresent = selectedMentions.filter(userId => {
+          const member = groupMembers.find(m => m.user_id === userId);
+          const nickname = member?.nickname || member?.user?.nickname;
+          if (!nickname) return false;
+          const escapedName = nickname.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+          return new RegExp(`@${escapedName}(\\s|$)`, 'g').test(text);
+        });
+        if (stillPresent.length !== selectedMentions.length) {
+          setSelectedMentions(stillPresent);
+        }
+      }
+
+      if (mentionAll && !text.includes('@所有人')) {
+        setMentionAll(false);
+      }
     }
-  }, [isGroupChat]);
+  }, [isGroupChat, selectedMentions, mentionAll, groupMembers]);
 
   // 【改造】获取发送者信息（群聊）- 优先从消息的 sender 字段获取
   const getSenderInfo = useCallback((senderId: string): SenderInfo => {