Add per-user ignored audiobooks feature

Introduce a per-user "ignored audiobooks" feature to suppress auto-requests. Changes include:

- Database: add Prisma model IgnoredAudiobook and SQL migration to create ignored_audiobooks table with indexes and FK to users.
- Backend: new API routes to list, add, delete, and check ignored audiobooks (/api/user/ignored-audiobooks, /check/:asin, /:id). Add annotateWithIgnoreStatus utility and integrate it into multiple audiobook list endpoints (popular, new-releases, category, search, authors, series).
- Request creator: add ignore-list check (with sibling-ASIN expansion) and a bypassIgnore option for manual requests; return an 'ignored' reason when blocked.
- Frontend: hooks (useIsIgnored, useToggleIgnore, useIgnoredList) and UI updates — AudiobookCard shows an "Ignored" indicator and AudiobookDetailsModal adds an ignore toggle and propagates local state changes.
- Misc: adjust deduplication duration tolerance (to 5% / min 10 minutes), tweak SWR refresh intervals for shelves/syncing, and small logging/info updates.
- Tests: add unit tests for request-creator ignore logic and update existing tests/mocks to account for ignore annotation; extend prisma test helper with ignoredAudiobook mock.

This commit implements the ignore-list end-to-end (DB, server, client, and tests) so users can ignore specific ASINs and have auto-request flows respect that preference.

src/app/api/authors/[asin]/books/route.ts

@@ -10,6 +10,7 @@ import { deduplicateAndCollectGroups } from '@/lib/utils/deduplicate-audiobooks'
 import { persistDedupGroups } from '@/lib/services/works.service';
 import { getCurrentUser } from '@/lib/middleware/auth';
 import { RMABLogger } from '@/lib/utils/logger';
+import { annotateWithIgnoreStatus } from '@/lib/utils/ignored-audiobooks';
 
 const logger = RMABLogger.create('API.Authors.Books');
 
@@ -67,11 +68,14 @@ export async function GET(
     const userId = currentUser.sub || undefined;
     const enrichedBooks = await enrichAudiobooksWithMatches(dedupedBooks, userId);
 
-    logger.info(`Author books complete: "${authorName}" → ${enrichedBooks.length} books (page ${page})`);
+    // Annotate with per-user ignore status
+    const annotatedBooks = await annotateWithIgnoreStatus(enrichedBooks, userId);
+
+    logger.info(`Author books complete: "${authorName}" → ${annotatedBooks.length} books (page ${page})`);
 
     return NextResponse.json({
       success: true,
-      books: enrichedBooks,
+      books: annotatedBooks,
       authorName: authorName.trim(),
       authorAsin: asin,
       totalBooks: enrichedBooks.length,