fix: 修复斗鱼Cookie导出422路由冲突 & 优化登录密码错误提示

- cookies.py: 将 GET /export 路由移至 GET /{task_id} 之前，避免
  动态路径 task_id:int 误匹配 'export' 导致 422 校验错误
- LoginPage.tsx: 密码错误(401)时清空密码框并自动聚焦，方便快速重试
- database.py/migrations/env.py: 应用内嵌调用 alembic 时跳过 fileConfig，
  避免覆盖 uvicorn 日志配置导致启动日志丢失
- client.ts: 401 拦截排除 /auth/login，避免登录失败时误跳转吞掉错误提示

web/backend/routers/cookies.py

@@ -133,37 +133,6 @@ def cookies_summary(
     }
 
 
-@router.get("/{task_id}")
-def get_cookie(
-    task_id: int,
-    db: Session = Depends(get_db),
-    current: User = Depends(get_current_user),
-):
-    """获取单条 Cookie 详情，供复制操作按需读取完整敏感字段。"""
-    task = _visible_cookie_tasks_query(db, current).filter(LoginTask.id == task_id).first()
-    if not task:
-        raise HTTPException(status_code=404, detail="记录不存在")
-    acc = db.query(Account).filter(Account.id == task.account_id).first()
-    item = {
-        "id": task.id,
-        "batch_id": task.batch_id,
-        "account_id": task.account_id,
-        "account_username": acc.username if acc else "",
-        "assigned_to": acc.assigned_to if acc else None,
-        "assigned_username": acc.assigned_user.username if acc and acc.assigned_user else None,
-        "created_at": _fmt_dt(task.finished_at),
-        "cookie": "",
-        "cookie_preview": "***",
-        "account_password": "",
-    }
-    if user_has_permission(current, "cookie:view"):
-        cookie = task.cookie or ""
-        item["cookie"] = cookie
-        item["cookie_preview"] = cookie[:50] + "..." if len(cookie) > 50 else cookie
-        item["account_password"] = acc.password if acc else ""
-    return item
-
-
 @router.get("/export")
 def export_cookies(
     format: str = "csv",
@@ -215,6 +184,37 @@ def export_cookies(
     )
 
 
+@router.get("/{task_id}")
+def get_cookie(
+    task_id: int,
+    db: Session = Depends(get_db),
+    current: User = Depends(get_current_user),
+):
+    """获取单条 Cookie 详情，供复制操作按需读取完整敏感字段。"""
+    task = _visible_cookie_tasks_query(db, current).filter(LoginTask.id == task_id).first()
+    if not task:
+        raise HTTPException(status_code=404, detail="记录不存在")
+    acc = db.query(Account).filter(Account.id == task.account_id).first()
+    item = {
+        "id": task.id,
+        "batch_id": task.batch_id,
+        "account_id": task.account_id,
+        "account_username": acc.username if acc else "",
+        "assigned_to": acc.assigned_to if acc else None,
+        "assigned_username": acc.assigned_user.username if acc and acc.assigned_user else None,
+        "created_at": _fmt_dt(task.finished_at),
+        "cookie": "",
+        "cookie_preview": "***",
+        "account_password": "",
+    }
+    if user_has_permission(current, "cookie:view"):
+        cookie = task.cookie or ""
+        item["cookie"] = cookie
+        item["cookie_preview"] = cookie[:50] + "..." if len(cookie) > 50 else cookie
+        item["account_password"] = acc.password if acc else ""
+    return item
+
+
 @router.delete("/batch")
 def delete_cookies_batch(
     task_ids: str = "",