refactor(LocalDataSource, PostRepository, ChatScreen): enhance database handling and message loading

- Introduced a promise-based initialization mechanism in LocalDataSource to prevent concurrent initialization issues.
- Updated PostRepository to utilize an enqueueWrite method for database operations, ensuring thread-safe writes.
- Refactored ChatScreen to improve message loading logic, including preloading history and managing scroll behavior more effectively.
- Enhanced message rendering logic to maintain correct indices in inverted lists and optimize user experience during scrolling.

src/services/database.ts

@@ -231,10 +231,19 @@ const isRecoverableDbError = (error: unknown): boolean => {
   const message = String(error);
   return (
     message.includes('NativeDatabase.prepareAsync') ||
-    message.includes('NullPointerException')
+    message.includes('NullPointerException') ||
+    message.includes('Cannot use shared object that was already released') ||
+    message.includes('NativeStatement')
   );
 };
 
+const recoverDbConnection = async (): Promise<SQLite.SQLiteDatabase> => {
+  // 清理当前引用，随后用当前用户上下文重建连接
+  db = null;
+  await initDatabase(currentDbUserId || undefined);
+  return getDb();
+};
+
 const withDbRead = async <T>(operation: (database: SQLite.SQLiteDatabase) => Promise<T>): Promise<T> => {
   let database = await getDb();
   try {
@@ -244,8 +253,7 @@ const withDbRead = async <T>(operation: (database: SQLite.SQLiteDatabase) => Pro
       throw error;
     }
     console.error('数据库读取异常，尝试重连后重试:', error);
-    db = null;
-    database = await getDb();
+    database = await recoverDbConnection();
     return operation(database);
   }
 };
@@ -259,7 +267,7 @@ const enqueueWrite = async <T>(operation: () => Promise<T>): Promise<T> => {
         throw error;
       }
       console.error('数据库写入异常，尝试重连后重试:', error);
-      db = null;
+      await recoverDbConnection();
       return operation();
     }
   };