Add language config and locale-aware parsing

Introduce centralized language configuration and wire locale-aware behavior across scraping and ranking. Adds src/lib/constants/language-config.ts with per-language scraping rules, stop words, and character replacements; replaces AudibleRegion.isEnglish with a language field in types and AUDIBLE_REGIONS. Update AudibleService, ebook scraper, processors, and API routes to use getLanguageForRegion so Anna's Archive searches, scraping selectors, runtime/rating parsing, and ranking use language-specific params and filters. Extend ranking algorithm to accept stopWords and characterReplacements and apply them during normalization and matching. Update UI selects to mark non-English regions and adjust tests accordingly.

tests/api/audiobooks-search.routes.test.ts

@@ -10,6 +10,7 @@ let authRequest: any;
 const requireAuthMock = vi.hoisted(() => vi.fn());
 const configServiceMock = vi.hoisted(() => ({
   get: vi.fn(),
+  getAudibleRegion: vi.fn().mockResolvedValue('us'),
 }));
 const prowlarrMock = vi.hoisted(() => ({
   search: vi.fn(),
@@ -43,6 +44,7 @@ vi.mock('@/lib/utils/indexer-grouping', () => ({
 describe('Audiobooks search torrents route', () => {
   beforeEach(() => {
     vi.clearAllMocks();
+    configServiceMock.getAudibleRegion.mockResolvedValue('us');
     authRequest = {
       user: { id: 'user-1', role: 'user' },
       json: vi.fn(),

tests/api/requests-actions.routes.test.ts

@@ -12,7 +12,7 @@ const prismaMock = createPrismaMock();
 const requireAuthMock = vi.hoisted(() => vi.fn());
 const prowlarrMock = vi.hoisted(() => ({ search: vi.fn(), searchWithVariations: vi.fn() }));
 const rankTorrentsMock = vi.hoisted(() => vi.fn());
-const configServiceMock = vi.hoisted(() => ({ get: vi.fn() }));
+const configServiceMock = vi.hoisted(() => ({ get: vi.fn(), getAudibleRegion: vi.fn().mockResolvedValue('us') }));
 const groupIndexersMock = vi.hoisted(() => vi.fn());
 const groupDescriptionMock = vi.hoisted(() => vi.fn(() => 'Group'));
 const configState = vi.hoisted(() => ({
@@ -75,6 +75,7 @@ vi.mock('fs/promises', () => ({ default: fsMock, ...fsMock, constants: { R_OK: 4
 describe('Request action routes', () => {
   beforeEach(() => {
     vi.clearAllMocks();
+    configServiceMock.getAudibleRegion.mockResolvedValue('us');
     configState.values.clear();
     authRequest = { user: { id: 'user-1', role: 'user' }, json: vi.fn() };
     requireAuthMock.mockImplementation((_req: any, handler: any) => handler(authRequest));