refactor: replace PostgREST calls in upload page with new API endpoints

- getDocumentTypes: switch from PostgREST /document_types to
  GET /api/document-types
- getTodayDocuments: switch from PostgREST /documents to
  GET /api/documents/list with userId + dateFrom params
- getQueueStatus: gracefully handle 404 (endpoint not yet migrated)
  by returning empty queue state instead of erroring

app/api/queue.ts

@@ -50,10 +50,21 @@ export async function getQueueStatus(): Promise<{ data?: QueueStatus; error?: st
 
     return { data: response.data };
   } catch (error) {
-    console.error('【队列状态】获取队列状态失败:', error);
+    // 队列接口暂未迁移，404 时返回空状态不报错
+    if (axios.isAxiosError(error) && error.response?.status === 404) {
+      return {
+        data: {
+          success: true,
+          timestamp: new Date().toISOString(),
+          queue: { pending_tasks: 0, processing_tasks: 0, available_slots: 0, max_concurrent: 4 },
+          documents: { waiting: 0, processing: 0, processing_ids: [] },
+        },
+      };
+    }
+    console.error("【队列状态】获取队列状态失败:", error);
     if (axios.isAxiosError(error)) {
       return { error: error.response?.data?.detail || error.message };
     }
-    return { error: error instanceof Error ? error.message : '获取队列状态失败' };
+    return { error: error instanceof Error ? error.message : "获取队列状态失败" };
   }
 }