feat: unify QuickInputBar across all apps with locale + deferSearch

- Add `locale` prop to all 6 apps using QuickInputBar
  (todo, contacts, zitare, citycorners, questions, calendar)
- Enable `deferSearch` on apps with create flow
  (contacts, zitare, questions) to match todo behavior
- Pass locale through Calendar's UnifiedBar wrapper
- Questions: default to 'en' locale (English-first app)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/contacts/apps/web/src/routes/(app)/+layout.svelte

@@ -347,9 +347,12 @@
 				placeholder="Neuer Kontakt oder suchen..."
 				emptyText="Keine Kontakte gefunden"
 				searchingText="Suche..."
+				searchText="Suchen"
 				onCreate={handleCreate}
 				onParseCreate={handleParseCreate}
 				createText="Erstellen"
+				deferSearch={true}
+				locale={$locale || 'de'}
 				appIcon="contacts"
 				bottomOffset={inputBarBottomOffset}
 				hasFabRight={showContactsToolbar}