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/config/index.ts

@@ -12,6 +12,8 @@ export { AutoSaveIndicator } from "./AutoSaveIndicator";
 export type { AutoSaveStatus, AutoSaveIndicatorProps } from "./AutoSaveIndicator";
 export { ConfFilesTab } from "./ConfFilesTab";
 export type { ConfFilesTabProps } from "./ConfFilesTab";
+export { ConfigListDetail } from "./ConfigListDetail";
+export type { ConfigListDetailProps } from "./ConfigListDetail";
 export { ExportTab } from "./ExportTab";
 export { FilterForm } from "./FilterForm";
 export type { FilterFormProps } from "./FilterForm";
@@ -21,6 +23,8 @@ export { JailFilesTab } from "./JailFilesTab";
 export { JailFileForm } from "./JailFileForm";
 export { JailsTab } from "./JailsTab";
 export { MapTab } from "./MapTab";
+export { RawConfigSection } from "./RawConfigSection";
+export type { RawConfigSectionProps } from "./RawConfigSection";
 export { RegexList } from "./RegexList";
 export type { RegexListProps } from "./RegexList";
 export { RegexTesterTab } from "./RegexTesterTab";