fix: extract types from .svelte files for proper named re-exports

Svelte 5 .svelte modules only expose a default export, so 'export type { X } from "./X.svelte"' fails type-check. Move shared interfaces into adjacent .ts type files.

- shared-ui/navigation: SpotlightAction, ContentSearcher, ContentSearch{Result,Group} → types.ts
- shared-auth-ui: PasskeyManagerTranslations, TwoFactorSetupTranslations, SessionManagerTranslations → types.ts
- mana/web/page-carousel: CarouselPage → new types.ts
- mana/web: bump @vitest/* to 4.1.2 (matches lockfile)

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

packages/shared-auth-ui/src/components/PasskeyManager.svelte

@@ -1,31 +1,5 @@
 <script lang="ts">
-	/** Translation strings for the PasskeyManager */
-	export interface PasskeyManagerTranslations {
-		title: string;
-		noPasskeys: string;
-		registerButton: string;
-		renameButton: string;
-		deleteButton: string;
-		cancelButton: string;
-		saveButton: string;
-		confirmDeleteTitle: string;
-		confirmDeleteMessage: string;
-		created: string;
-		lastUsed: string;
-		never: string;
-		backedUp: string;
-		notBackedUp: string;
-		browserNotSupported: string;
-		registerNamePlaceholder: string;
-		registerNameLabel: string;
-		registerTitle: string;
-		renamePlaceholder: string;
-		errorGeneric: string;
-		daysAgo: (days: number) => string;
-		hoursAgo: (hours: number) => string;
-		minutesAgo: (minutes: number) => string;
-		justNow: string;
-	}
+	import type { PasskeyManagerTranslations } from '../types';
 
 	interface Passkey {
 		id: string;

packages/shared-auth-ui/src/components/SessionManager.svelte

@@ -1,26 +1,6 @@
 <script lang="ts">
 	import { parseUserAgent, getDeviceType } from '../utils/userAgent';
-
-	export interface SessionManagerTranslations {
-		title?: string;
-		subtitle?: string;
-		current?: string;
-		revoke?: string;
-		revokeAll?: string;
-		lastActivity?: string;
-		confirmRevoke?: string;
-		confirmRevokeAll?: string;
-		noSessions?: string;
-		unknown?: string;
-		refresh?: string;
-		revokeError?: string;
-		revokeAllError?: string;
-		justNow?: string;
-		minutesAgo?: string;
-		hoursAgo?: string;
-		yesterday?: string;
-		daysAgo?: string;
-	}
+	import type { SessionManagerTranslations } from '../types';
 
 	interface Session {
 		id: string;

packages/shared-auth-ui/src/components/TwoFactorSetup.svelte

@@ -1,32 +1,6 @@
 <script lang="ts">
 	import QRCode from 'qrcode';
-	import type { AuthResult } from '../types';
-
-	export interface TwoFactorSetupTranslations {
-		title: string;
-		statusEnabled: string;
-		statusDisabled: string;
-		enableButton: string;
-		disableButton: string;
-		regenerateButton: string;
-		passwordLabel: string;
-		passwordPlaceholder: string;
-		confirmButton: string;
-		cancelButton: string;
-		setupTitle: string;
-		setupStep1: string;
-		setupStep2: string;
-		manualEntryLabel: string;
-		copyButton: string;
-		copiedButton: string;
-		doneButton: string;
-		disableConfirmTitle: string;
-		disableConfirmText: string;
-		backupCodesTitle: string;
-		backupCodesWarning: string;
-		copyCodesButton: string;
-		copiedCodesButton: string;
-	}
+	import type { AuthResult, TwoFactorSetupTranslations } from '../types';
 
 	const defaultTranslations: TwoFactorSetupTranslations = {
 		title: 'Zwei-Faktor-Authentifizierung',