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/components/__tests__/ConfigPageLogPath.test.tsx

@@ -36,6 +36,7 @@ const {
   mockUpdateServerSettings,
   mockFlushLogs,
   mockSetJailConfigFileEnabled,
+  mockUpdateJailConfigFile,
 } = vi.hoisted(() => ({
   mockAddLogPath: vi.fn<() => Promise<void>>().mockResolvedValue(undefined),
   mockDeleteLogPath: vi.fn<() => Promise<void>>().mockResolvedValue(undefined),
@@ -73,6 +74,7 @@ const {
   mockUpdateServerSettings: vi.fn<() => Promise<void>>().mockResolvedValue(undefined),
   mockFlushLogs: vi.fn().mockResolvedValue({ message: "ok" }),
   mockSetJailConfigFileEnabled: vi.fn<() => Promise<void>>().mockResolvedValue(undefined),
+  mockUpdateJailConfigFile: vi.fn<() => Promise<void>>().mockResolvedValue(undefined),
 }));
 
 vi.mock("../../api/config", () => ({
@@ -91,6 +93,7 @@ vi.mock("../../api/config", () => ({
   updateMapColorThresholds: mockUpdateMapColorThresholds,
   fetchJailConfigFiles: mockFetchJailConfigFiles,
   fetchJailConfigFileContent: vi.fn(),
+  updateJailConfigFile: mockUpdateJailConfigFile,
   setJailConfigFileEnabled: mockSetJailConfigFileEnabled,
   fetchFilterFiles: mockFetchFilterFiles,
   fetchFilterFile: vi.fn(),
@@ -104,6 +107,10 @@ vi.mock("../../api/config", () => ({
   testRegex: vi.fn(),
 }));
 
+vi.mock("../../api/jails", () => ({
+  fetchJails: vi.fn().mockResolvedValue({ jails: [], total: 0 }),
+}));
+
 /** Minimal jail fixture used across tests. */
 const MOCK_JAIL: JailConfig = {
   name: "sshd",
@@ -134,10 +141,10 @@ function renderConfigPage() {
   );
 }
 
-/** Waits for the sshd accordion button to appear and clicks it open. */
+/** Waits for the sshd list item to appear and clicks it to open the detail pane. */
 async function openSshdAccordion(user: ReturnType<typeof userEvent.setup>) {
-  const accordionBtn = await screen.findByRole("button", { name: /sshd/i });
-  await user.click(accordionBtn);
+  const listItem = await screen.findByRole("option", { name: /sshd/i });
+  await user.click(listItem);
 }
 
 // ---------------------------------------------------------------------------