@

feat: shadcn主题 + 文件关系追踪 + 处理流程修复

前端:
- 全站应用 shadcn/ui 主题 (zinc灰调, Inter字体, 1px细边框, 无硬阴影)
- 重写 global.css / Dashboard.vue / Login.vue / Layout.vue 样式
- 新增文件处理子页面: 采购单(Orders), 表格处理(Tables), 图片处理(Images)
- 侧边栏使用 el-sub-menu 组织文件处理导航

后端:
- 新增 file_relations 表追踪 input→output→result 链路
- 新增 /files/relations, /files/stats/detailed 等关系查询API
- 新增 ocr-single, excel-single, pipeline-single, merge-batch 端点
- 处理流程增加跳过逻辑 (已处理文件自动跳过)
- 全流程不再自动合并, 合并仅在采购单页面手动触发

Bug修复:
- TaskManager: asyncio.create_task 在线程池中无事件循环 → 改用 _schedule() 调度
- PurchaseOrderMerger 缺少 config 参数 → 传入 ConfigManager()
- FastAPI regex= 弃用 → 改为 pattern=
- merger.process() 接收 Path 对象 → 转为字符串
@

web/backend/services/task_manager.py

@@ -47,10 +47,25 @@ class TaskManager:
         self._tasks: Dict[str, Task] = {}
         self._connections: Dict[str, Set] = {}
         self._db = None  # type: ignore
+        self._loop = None  # captured event loop
 
     def set_db_pool(self, db_pool):
         """Set the DBPool reference for database persistence."""
         self._db = db_pool
+        try:
+            self._loop = asyncio.get_running_loop()
+        except RuntimeError:
+            pass
+
+    def _schedule(self, coro):
+        """Schedule a coroutine from either async or thread context."""
+        try:
+            loop = asyncio.get_running_loop()
+            asyncio.ensure_future(coro, loop=loop)
+        except RuntimeError:
+            # No running loop — we're in a thread; schedule onto the main loop
+            if self._loop and self._loop.is_running():
+                asyncio.run_coroutine_threadsafe(coro, self._loop)
 
     def create_task(self, name: str) -> Task:
         task_id = str(uuid.uuid4())[:8]
@@ -58,7 +73,7 @@ class TaskManager:
         self._tasks[task_id] = task
         self._connections[task_id] = set()
         if self._db:
-            asyncio.create_task(
+            self._schedule(
                 self._db.execute_write(insert_task, task_id, name, TaskStatus.PENDING.value)
             )
         return task
@@ -76,13 +91,13 @@ class TaskManager:
         task.progress = progress
         task.message = message
         if self._db:
-            asyncio.create_task(
+            self._schedule(
                 self._db.execute_write(
                     update_task, task_id,
                     status=task.status.value, progress=progress, message=message,
                 )
             )
-        asyncio.create_task(self._broadcast(task_id))
+        self._schedule(self._broadcast(task_id))
 
     def add_log(self, task_id: str, line: str):
         task = self._tasks.get(task_id)
@@ -90,13 +105,13 @@ class TaskManager:
             return
         task.log_lines.append(line)
         if self._db:
-            asyncio.create_task(
+            self._schedule(
                 self._db.execute_write(
                     update_task, task_id,
                     log_lines=json.dumps(task.log_lines[-200:]),
                 )
             )
-        asyncio.create_task(self._broadcast(task_id))
+        self._schedule(self._broadcast(task_id))
 
     def set_completed(self, task_id: str, result_files: List[str] = None, message: str = ""):
         task = self._tasks.get(task_id)
@@ -109,7 +124,7 @@ class TaskManager:
             task.result_files = result_files
         now = datetime.now().isoformat()
         if self._db:
-            asyncio.create_task(
+            self._schedule(
                 self._db.execute_write(
                     update_task, task_id,
                     status=TaskStatus.COMPLETED.value, progress=100,
@@ -118,7 +133,7 @@ class TaskManager:
                     completed_at=now,
                 )
             )
-        asyncio.create_task(self._broadcast(task_id))
+        self._schedule(self._broadcast(task_id))
 
     def set_failed(self, task_id: str, error: str):
         task = self._tasks.get(task_id)
@@ -129,14 +144,14 @@ class TaskManager:
         task.message = f"处理失败: {error}"
         now = datetime.now().isoformat()
         if self._db:
-            asyncio.create_task(
+            self._schedule(
                 self._db.execute_write(
                     update_task, task_id,
                     status=TaskStatus.FAILED.value, error=error,
                     message=task.message, completed_at=now,
                 )
             )
-        asyncio.create_task(self._broadcast(task_id))
+        self._schedule(self._broadcast(task_id))
 
     def subscribe(self, task_id: str, websocket):
         if task_id in self._connections: