feat: 服务端集成自动打包流程

backend/services/log_streamer.py

@@ -15,12 +15,17 @@ class LogStreamer:
         self._queues: Dict[str, asyncio.Queue] = {}
         self._subscribers: Dict[str, list] = {}
         self._log_lines: Dict[str, list] = {}
+        self._completed: set[str] = set()
 
     def create_queue(self, task_id: str) -> asyncio.Queue:
-        """创建任务的日志队列"""
+        """创建任务的日志队列（重复调用时保留已有日志）"""
+        if task_id in self._queues:
+            return self._queues[task_id]
+
         queue = asyncio.Queue(maxsize=LOG_QUEUE_MAX_SIZE)
         self._queues[task_id] = queue
-        self._log_lines[task_id] = []
+        self._log_lines.setdefault(task_id, [])
+        self._completed.discard(task_id)
         return queue
 
     async def emit(self, task_id: str, message: str, level: str = "info"):
@@ -66,11 +71,19 @@ class LogStreamer:
         if not queue:
             return
 
-        # 回放已缓存的历史日志
-        existing = self._log_lines.get(task_id, [])
+        # Messages are stored both in history and the live queue.  Replay the
+        # history once, then discard its queue copies before waiting for new logs.
+        existing = list(self._log_lines.get(task_id, []))
+        completed = task_id in self._completed
+        while not queue.empty():
+            queue.get_nowait()
+
         for entry in existing:
             yield entry
 
+        if completed:
+            return
+
         # 流式推送新消息
         while True:
             try:
@@ -86,6 +99,7 @@ class LogStreamer:
 
     def complete(self, task_id: str):
         """标记任务日志结束"""
+        self._completed.add(task_id)
         if task_id in self._queues:
             try:
                 self._queues[task_id].put_nowait(None)
@@ -95,6 +109,7 @@ class LogStreamer:
     def cleanup(self, task_id: str):
         """清理任务日志队列"""
         self._queues.pop(task_id, None)
+        self._completed.discard(task_id)
 
     def save_log(self, task_id: str, build_dir: Path):
         """将收集的日志保存到独立日志目录（不会随构建目录删除）"""