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/calendar/apps/web/src/lib/components/calendar/UnifiedBar.svelte

@@ -32,6 +32,8 @@
 		isMobile?: boolean;
 		/** Hide the entire bar (e.g. immersive mode) */
 		hidden?: boolean;
+		/** Locale for syntax highlighting (e.g., 'de', 'en') */
+		locale?: string;
 	}
 
 	let {
@@ -53,6 +55,7 @@
 		showCalendarLayers = false,
 		isMobile = false,
 		hidden = false,
+		locale = 'de',
 	}: Props = $props();
 
 	const flyConfig = { duration: 250, easing: quintOut, y: 40 };
@@ -141,6 +144,7 @@
 			{searchingText}
 			{createText}
 			{appIcon}
+			{locale}
 			bottomOffset="0px"
 			hasFabRight={showCalendarLayers}
 			{defaultOptions}

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

@@ -473,6 +473,7 @@
 				searchingText="Suche..."
 				createText="Erstellen"
 				appIcon="calendar"
+				locale={$locale || 'de'}
 				defaultOptions={calendarOptions}
 				selectedDefaultId={selectedDefaultCalendarId}
 				defaultOptionLabel="Standard-Kalender"