chore: update styles, exports, api, tests, and mark config redesign task complete

- configStyles.ts: add listDetailRoot, listPane, listItem, listItemSelected,
  detailPane style slots
- index.ts: export ConfigListDetail and RawConfigSection
- api/config.ts: add writeFilterFile and writeActionFile API helpers
- setupTests.ts: add ResizeObserver and matchMedia mocks for Fluent UI v9
- ConfigPageLogPath.test.tsx: update to render inside FluentProvider
- Docs/Tasks.md: mark config view redesign task as complete

frontend/src/api/config.ts

@@ -182,6 +182,13 @@ export async function fetchJailConfigFileContent(
   return get<JailConfigFileContent>(ENDPOINTS.configJailFile(filename));
 }
 
+export async function updateJailConfigFile(
+  filename: string,
+  req: ConfFileUpdateRequest
+): Promise<void> {
+  await put<undefined>(ENDPOINTS.configJailFile(filename), req);
+}
+
 export async function setJailConfigFileEnabled(
   filename: string,
   update: JailConfigFileEnabledUpdate