fix: optimize compliance scan performance and improve error handling

- Refactor scan_compliance to eliminate N+1 queries using joinedload and batch loading
- Add try-except wrapper in compliance scan API endpoint
- Improve frontend axios error interceptor to display detail/message/timeout errors
- Update CORS config and nginx for domain deployment

backend/app/api/v1/project.py

@@ -1,5 +1,5 @@
 from typing import Optional
-from fastapi import APIRouter, Depends, Query
+from fastapi import APIRouter, Depends, Query, HTTPException, status
 from sqlalchemy.orm import Session
 
 from app.core.database import get_db
@@ -89,7 +89,6 @@ def delete_project(
 ):
     p = project_service.get_project(db, project_id)
     if not p:
-        from fastapi import HTTPException, status
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="项目不存在")
     # Only admin or project creator can delete
     if not _is_admin(current_user) and p.created_by != current_user.id:
@@ -110,32 +109,39 @@ def project_auto_classify(
 
     project = project_service.get_project(db, project_id)
     if not project:
-        from fastapi import HTTPException, status
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="项目不存在")
 
-    if background:
-        # Check if already running
-        if project.celery_task_id:
-            existing = AsyncResult(project.celery_task_id)
-            if existing.state in ("PENDING", "PROGRESS", "STARTED"):
-                return ResponseModel(data={"task_id": project.celery_task_id, "status": existing.state})
+    try:
+        if background:
+            # Check if already running
+            if project.celery_task_id:
+                existing = AsyncResult(project.celery_task_id)
+                if existing.state in ("PENDING", "PROGRESS", "STARTED"):
+                    return ResponseModel(data={"task_id": project.celery_task_id, "status": existing.state})
 
-        task = auto_classify_task.delay(project_id)
-        project.celery_task_id = task.id
-        project.status = "scanning"
-        db.commit()
-        return ResponseModel(data={"task_id": task.id, "status": task.state})
-    else:
-        from app.services.classification_engine import run_auto_classification
-        project.status = "scanning"
-        db.commit()
-        result = run_auto_classification(db, project_id)
-        if result.get("success"):
-            project.status = "assigning"
+            task = auto_classify_task.delay(project_id)
+            project.celery_task_id = task.id
+            project.status = "scanning"
+            db.commit()
+            return ResponseModel(data={"task_id": task.id, "status": task.state})
         else:
-            project.status = "created"
-        db.commit()
-        return ResponseModel(data=result)
+            from app.services.classification_engine import run_auto_classification
+            project.status = "scanning"
+            db.commit()
+            result = run_auto_classification(db, project_id)
+            if result.get("success"):
+                project.status = "assigning"
+            else:
+                project.status = "created"
+            db.commit()
+            return ResponseModel(data=result)
+    except Exception as e:
+        import logging
+        logging.exception("Auto classify failed")
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"自动分类执行失败: {str(e)}"
+        )
 
 
 @router.get("/{project_id}/auto-classify-status")
@@ -149,7 +155,6 @@ def project_auto_classify_status(
 
     project = project_service.get_project(db, project_id)
     if not project:
-        from fastapi import HTTPException, status
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="项目不存在")
 
     task_id = project.celery_task_id