refactor: split TG worker into poller (callbacks) and sender (email summaries) threads

main.py

@@ -98,16 +98,21 @@ def _ai_processor(cfg):
             time.sleep(0.1 if pending_futures else 0.5)
 
 
-def _tg_worker(cfg):
-    logger.info("TG 线程已启动")
+def _tg_poller(cfg):
+    logger.info("TG 轮询线程已启动（按钮回调专用）")
     last_update_id = 0
     while _running:
         try:
             last_update_id = poll_telegram(cfg.telegram, cfg, last_update_id)
         except Exception as e:
             logger.error(f"TG 轮询错误: {e}", exc_info=True)
+        if _running:
+            _shutdown_event.wait(0.1)
 
-        # 每轮只处理一封待发邮件，然后立刻回去 poll Telegram
+
+def _tg_sender(cfg):
+    logger.info("TG 发送线程已启动（邮件摘要专用）")
+    while _running:
         try:
             info = _tg_queue.get_nowait()
             tg_send_and_mark(cfg, info)
@@ -122,7 +127,6 @@ def _tg_worker(cfg):
                 mark_failed(uid_str)
             except Exception:
                 pass
-
         if _running:
             _shutdown_event.wait(0.2)
 
@@ -140,7 +144,8 @@ def main():
     threads = [
         threading.Thread(target=_email_poller, args=(cfg,), daemon=True),
         threading.Thread(target=_ai_processor, args=(cfg,), daemon=True),
-        threading.Thread(target=_tg_worker, args=(cfg,), daemon=True),
+        threading.Thread(target=_tg_poller, args=(cfg,), daemon=True),
+        threading.Thread(target=_tg_sender, args=(cfg,), daemon=True),
     ]
 
     for t in threads: