feat(client): redesign sidebar navigation, settings, and user management

Rework the app shell around a customizable sidebar: reorderable sections, sidebar zones, entity
popovers, and per-user preference persistence, backed by a dedicated browse counts endpoint so
entity totals stay cheap on large libraries.

Redesign the file naming settings with pattern fields, a token helper sheet, and a debounced live
preview. Rebuild the admin users table with server-side pagination, search, and filter DTOs, status
pills, confirmation dialogs, and magic link actions. Group notification preferences by category and
refine the account and privacy settings layouts.

Update theme tokens, icon references, and template event handler bindings across client features for
consistency, extend all locale catalogs, and add unit coverage for the new composables, components,
and server modules.

server/src/app.module.ts

@@ -44,6 +44,7 @@ import { SeedModule } from './modules/seed/seed.module';
 import { EmailModule } from './modules/email/email.module';
 import { EpubModule } from './modules/reader/epub/epub.module';
 import { BookDockModule } from './modules/book-dock/book-dock.module';
+import { BrowseCountsModule } from './modules/browse-counts/browse-counts.module';
 import { UploadModule } from './modules/upload/upload.module';
 import { UserModule } from './modules/user/user.module';
 import { AuthorsModule } from './modules/authors/authors.module';
@@ -151,6 +152,7 @@ import { BookDuplicatesModule } from './modules/book-duplicates/book-duplicates.
     AccountActivityModule,
     SharedReadingInsightsModule,
     BookDuplicatesModule,
+    BrowseCountsModule,
   ],
   providers: [
     { provide: APP_INTERCEPTOR, useClass: AuditInterceptor },