refactor(logging): 优化日志格式和内容以提高可读性

- 调整日志格式，增加模块名显示
- 将部分debug日志升级为info级别以增加可见性
- 简化日志消息，缩短显示长度
- 统一日志前缀格式
- 优化工具调用日志显示

bot/handler.py

@@ -30,11 +30,11 @@ def _handle_message(data: P2ImMessageReceiveV1) -> None:
         sender = data.event.sender
 
         # Log raw event for debugging
-        logger.info(
-            "RAW event: type=%r content=%r chat_type=%r",
+        logger.debug(
+            "event type=%r chat_type=%r content=%r",
             getattr(message, "message_type", None),
-            getattr(message, "content", None),
             getattr(message, "chat_type", None),
+            (getattr(message, "content", None) or "")[:100],
         )
 
         # Only handle text messages
@@ -60,7 +60,7 @@ def _handle_message(data: P2ImMessageReceiveV1) -> None:
             logger.info("Empty text after stripping, ignoring")
             return
 
-        logger.info("Received message from %s in %s: %r", open_id, chat_id, text[:80])
+        logger.info("✉  ...%s → %r", open_id[-8:], text[:80])
 
         # Use open_id as user identifier for per-user history in the orchestrator
         user_id = open_id or chat_id