fix(im_bot): segment long WeChat text replies + enhance send diagnostics (#878)\n\niLink returns HTTP 200 but WeChat silently drops long messages (1698-char\nHTML image link, 3011-char skill list). Add WECHAT_TEXT_MAX_LEN=1500 and\nsegment long text into multiple items. Also log payload item lengths and\nmedia URL lengths for future diagnosis.

backend/python/main.py

@@ -191,6 +191,13 @@ async def lifespan(app: FastAPI):
     except Exception as e:
         logger.warning(f"[EventBus] 启动失败(不影响正常服务): {e}")
 
+    # 启动个人微信接收线程（之前仅在扫码确认时启动，重启后丢失）
+    try:
+        from app.api.im_bot_user import start_all_wechat_receivers
+        start_all_wechat_receivers()
+    except Exception as e:
+        logger.warning(f"[IM个人微信] 启动恢复失败(不影响正常服务): {e}")
+
     logger.info("Qihu-AIFlow v2.0.0 启动完成")
 
     yield