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

frontend/src/api/config.ts

@@ -2,12 +2,19 @@
  * API functions for the configuration and server settings endpoints.
  */
 
-import { get, post, put } from "./client";
+import { del, get, post, put } from "./client";
 import { ENDPOINTS } from "./endpoints";
 import type {
   AddLogPathRequest,
+  ConfFileContent,
+  ConfFileCreateRequest,
+  ConfFilesResponse,
+  ConfFileUpdateRequest,
   GlobalConfig,
   GlobalConfigUpdate,
+  JailConfigFileContent,
+  JailConfigFileEnabledUpdate,
+  JailConfigFilesResponse,
   JailConfigListResponse,
   JailConfigResponse,
   JailConfigUpdate,
@@ -88,6 +95,15 @@ export async function addLogPath(
   await post<undefined>(ENDPOINTS.configJailLogPath(jailName), req);
 }
 
+export async function deleteLogPath(
+  jailName: string,
+  logPath: string
+): Promise<void> {
+  await del<undefined>(
+    `${ENDPOINTS.configJailLogPath(jailName)}?log_path=${encodeURIComponent(logPath)}`
+  );
+}
+
 // ---------------------------------------------------------------------------
 // Log preview
 // ---------------------------------------------------------------------------
@@ -139,3 +155,74 @@ export async function updateMapColorThresholds(
     update,
   );
 }
+
+// ---------------------------------------------------------------------------
+// Jail config files (Task 4a)
+// ---------------------------------------------------------------------------
+
+export async function fetchJailConfigFiles(): Promise<JailConfigFilesResponse> {
+  return get<JailConfigFilesResponse>(ENDPOINTS.configJailFiles);
+}
+
+export async function fetchJailConfigFileContent(
+  filename: string
+): Promise<JailConfigFileContent> {
+  return get<JailConfigFileContent>(ENDPOINTS.configJailFile(filename));
+}
+
+export async function setJailConfigFileEnabled(
+  filename: string,
+  update: JailConfigFileEnabledUpdate
+): Promise<void> {
+  await put<undefined>(ENDPOINTS.configJailFileEnabled(filename), update);
+}
+
+// ---------------------------------------------------------------------------
+// Filter files (Task 4d)
+// ---------------------------------------------------------------------------
+
+export async function fetchFilterFiles(): Promise<ConfFilesResponse> {
+  return get<ConfFilesResponse>(ENDPOINTS.configFilters);
+}
+
+export async function fetchFilterFile(name: string): Promise<ConfFileContent> {
+  return get<ConfFileContent>(ENDPOINTS.configFilter(name));
+}
+
+export async function updateFilterFile(
+  name: string,
+  req: ConfFileUpdateRequest
+): Promise<void> {
+  await put<undefined>(ENDPOINTS.configFilter(name), req);
+}
+
+export async function createFilterFile(
+  req: ConfFileCreateRequest
+): Promise<ConfFileContent> {
+  return post<ConfFileContent>(ENDPOINTS.configFilters, req);
+}
+
+// ---------------------------------------------------------------------------
+// Action files (Task 4e)
+// ---------------------------------------------------------------------------
+
+export async function fetchActionFiles(): Promise<ConfFilesResponse> {
+  return get<ConfFilesResponse>(ENDPOINTS.configActions);
+}
+
+export async function fetchActionFile(name: string): Promise<ConfFileContent> {
+  return get<ConfFileContent>(ENDPOINTS.configAction(name));
+}
+
+export async function updateActionFile(
+  name: string,
+  req: ConfFileUpdateRequest
+): Promise<void> {
+  await put<undefined>(ENDPOINTS.configAction(name), req);
+}
+
+export async function createActionFile(
+  req: ConfFileCreateRequest
+): Promise<ConfFileContent> {
+  return post<ConfFileContent>(ENDPOINTS.configActions, req);
+}