Add better jail configuration: file CRUD, enable/disable, log paths

Task 4 (Better Jail Configuration) implementation:
- Add fail2ban_config_dir setting to app/config.py
- New file_config_service: list/view/edit/create jail.d, filter.d, action.d files
  with path-traversal prevention and 512 KB content size limit
- New file_config router: GET/PUT/POST endpoints for jail files, filter files,
  and action files; PUT .../enabled for toggle on/off
- Extend config_service with delete_log_path() and add_log_path()
- Add DELETE /api/config/jails/{name}/logpath and POST /api/config/jails/{name}/logpath
- Extend geo router with re-resolve endpoint; add geo_re_resolve background task
- Update blocklist_service with revised scheduling helpers
- Update Docker compose files with BANGUI_FAIL2BAN_CONFIG_DIR env var and
  rw volume mount for the fail2ban config directory
- Frontend: new Jail Files, Filters, Actions tabs in ConfigPage; file editor
  with accordion-per-file, editable textarea, save/create; add/delete log paths
- Frontend: types in types/config.ts; API calls in api/config.ts and api/endpoints.ts
- 63 new backend tests (test_file_config_service, test_file_config, test_geo_re_resolve)
- 6 new frontend tests in ConfigPageLogPath.test.tsx
- ruff, mypy --strict, tsc --noEmit, eslint: all clean; 617 backend tests pass

backend/app/routers/config.py

@@ -18,7 +18,7 @@ from __future__ import annotations
 
 from typing import Annotated
 
-from fastapi import APIRouter, HTTPException, Path, Request, status
+from fastapi import APIRouter, HTTPException, Path, Query, Request, status
 
 from app.dependencies import AuthDep
 from app.models.config import (
@@ -354,9 +354,42 @@ async def add_log_path(
         raise _bad_gateway(exc) from exc
 
 
-# ---------------------------------------------------------------------------
-# Log preview
-# ---------------------------------------------------------------------------
+@router.delete(
+    "/jails/{name}/logpath",
+    status_code=status.HTTP_204_NO_CONTENT,
+    summary="Remove a monitored log path from a jail",
+)
+async def delete_log_path(
+    request: Request,
+    _auth: AuthDep,
+    name: _NamePath,
+    log_path: str = Query(..., description="Absolute path of the log file to stop monitoring."),
+) -> None:
+    """Stop a jail from monitoring the specified log file.
+
+    Uses ``set <jail> dellogpath <path>`` to remove the log path at runtime
+    without requiring a daemon restart.
+
+    Args:
+        request: Incoming request.
+        _auth: Validated session.
+        name: Jail name.
+        log_path: Absolute path to the log file to remove (query parameter).
+
+    Raises:
+        HTTPException: 404 when the jail does not exist.
+        HTTPException: 400 when the command is rejected.
+        HTTPException: 502 when fail2ban is unreachable.
+    """
+    socket_path: str = request.app.state.settings.fail2ban_socket
+    try:
+        await config_service.delete_log_path(socket_path, name, log_path)
+    except JailNotFoundError:
+        raise _not_found(name) from None
+    except ConfigOperationError as exc:
+        raise _bad_request(str(exc)) from exc
+    except Fail2BanConnectionError as exc:
+        raise _bad_gateway(exc) from exc
 
 
 @router.post(