## 27) Error response body shape is inconsistent

backend/app/routers/jails.py

@@ -22,7 +22,7 @@ from __future__ import annotations
 import asyncio
 from typing import Annotated
 
-from fastapi import APIRouter, Body, HTTPException, Path, status
+from fastapi import APIRouter, Body, Path, status
 
 from app.dependencies import (
     AuthDep,
@@ -32,6 +32,7 @@ from app.dependencies import (
     HttpSessionDep,
     JailServiceStateDep,
 )
+from app.exceptions import BadRequestError
 from app.models.ban import JailBannedIpsResponse
 from app.models.jail import (
     IgnoreIpRequest,
@@ -469,15 +470,9 @@ async def get_jail_banned_ips(
         HTTPException: 502 when fail2ban is unreachable.
     """
     if page < 1:
-        raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST,
-            detail="page must be >= 1.",
-        )
+        raise BadRequestError("page must be >= 1.")
     if not (1 <= page_size <= 100):
-        raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST,
-            detail="page_size must be between 1 and 100.",
-        )
+        raise BadRequestError("page_size must be between 1 and 100.")
 
     return await jail_service.get_jail_banned_ips(
         socket_path=socket_path,