格式统一

src/gui/core/event_bus.py

@@ -11,16 +11,19 @@
   - 新增 unsubscribe() 方法，允许面板销毁时清理订阅，防止内存泄漏和野指针回调
 """
 
+import sys
+import threading
 import traceback
 from collections import defaultdict
 from typing import Any, Callable, Dict, List, Optional
 
 
 class EventBus:
-    """发布-订阅事件总线"""
+    """发布-订阅事件总线（线程安全）。"""
 
     def __init__(self):
         self._subscribers: Dict[str, List[Callable]] = defaultdict(list)
+        self._lock = threading.Lock()
         # 异常日志回调（可选注入，供 LogManager 使用）
         self._error_logger: Optional[Callable[[str], None]] = None
 
@@ -30,38 +33,42 @@ class EventBus:
 
     def subscribe(self, event_name: str, callback: Callable[[dict], None]):
         """订阅事件。callback 接收一个 dict 作为事件数据。"""
-        if callback not in self._subscribers[event_name]:
-            self._subscribers[event_name].append(callback)
+        with self._lock:
+            if callback not in self._subscribers[event_name]:
+                self._subscribers[event_name].append(callback)
 
     def unsubscribe(self, event_name: str, callback: Callable[[dict], None]):
         """取消订阅。面板销毁或不再需要接收事件时调用，防止野指针回调。"""
-        subs = self._subscribers.get(event_name)
-        if subs and callback in subs:
-            subs.remove(callback)
-            # 清理空列表，避免字典膨胀
-            if not subs:
-                del self._subscribers[event_name]
+        with self._lock:
+            subs = self._subscribers.get(event_name)
+            if subs and callback in subs:
+                subs.remove(callback)
+                # 清理空列表，避免字典膨胀
+                if not subs:
+                    del self._subscribers[event_name]
 
     def publish(self, event_name: str, data: Dict[str, Any]):
         """发布事件，通知所有订阅者。订阅者异常不再静默吞掉，而是输出 traceback。
 
         迭代订阅者列表的副本，防止回调中调用 unsubscribe() 导致跳过后续订阅者。
         """
-        for callback in list(self._subscribers.get(event_name, [])):
+        with self._lock:
+            snapshot = list(self._subscribers.get(event_name, []))
+        for callback in snapshot:
             try:
                 callback(data)
             except Exception:
+                cb_name = getattr(callback, '__name__', None) or repr(callback)
                 err_msg = (
-                    f"[EventBus] 事件 '{event_name}' 的订阅者 {callback.__name__!r} 抛出异常:\n"
+                    f"[EventBus] 事件 '{event_name}' 的订阅者 {cb_name!r} 抛出异常:\n"
                     + traceback.format_exc()
                 )
                 if self._error_logger:
                     try:
                         self._error_logger(err_msg)
                     except Exception:
-                        pass
+                        print(err_msg, file=sys.stderr, flush=True)
                 else:
-                    import sys
                     print(err_msg, file=sys.stderr, flush=True)