Add reported-issues, Goodreads sync & notifs

Introduce user-reported-issues and Goodreads shelf sync features and wire them into notifications. Adds Prisma migrations and schema changes (ReportedIssue, GoodreadsShelf, GoodreadsBookMapping), API endpoints for reporting (POST /audiobooks/[asin]/report-issue) and admin management (list, resolve/dismiss, replace), and an admin UI section to view/dismiss/replace reported issues. Adds a new notification event (issue_reported) with updates to notification schemas, docs and provider handling, plus a notification-events constants file. Refactors request creation to use createRequestForUser service, adds a Goodreads sync processor/service/hooks/UI modals, a scrape-resilience util, and related tests and minor integration updates.

src/app/api/user/goodreads-shelves/[id]/route.ts

@@ -0,0 +1,50 @@
+/**
+ * Component: Goodreads Shelf Delete Route
+ * Documentation: documentation/backend/services/goodreads-sync.md
+ */
+
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAuth, AuthenticatedRequest } from '@/lib/middleware/auth';
+import { prisma } from '@/lib/db';
+import { RMABLogger } from '@/lib/utils/logger';
+
+const logger = RMABLogger.create('API.GoodreadsShelves');
+
+/**
+ * DELETE /api/user/goodreads-shelves/[id]
+ * Remove a Goodreads shelf subscription (ownership check)
+ */
+export async function DELETE(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    try {
+      if (!req.user) {
+        return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+      }
+
+      const { id } = await params;
+
+      const shelf = await prisma.goodreadsShelf.findUnique({
+        where: { id },
+      });
+
+      if (!shelf) {
+        return NextResponse.json({ error: 'Shelf not found' }, { status: 404 });
+      }
+
+      // Ownership check
+      if (shelf.userId !== req.user.id) {
+        return NextResponse.json({ error: 'Forbidden' }, { status: 403 });
+      }
+
+      await prisma.goodreadsShelf.delete({ where: { id } });
+
+      return NextResponse.json({ success: true });
+    } catch (error) {
+      logger.error('Failed to delete shelf', { error: error instanceof Error ? error.message : String(error) });
+      return NextResponse.json({ error: 'Failed to delete shelf' }, { status: 500 });
+    }
+  });
+}