fix(web): align lazy-PreviewOverlay layout with renamed OIDC bootstrap

Stale import landed when 6b8c7ab rebased on top of the OIDC-rename
commit. The call site updated to bootstrapSessionFromPhotoPrism but
the import line kept the old bootstrapSessionFromCookies name —
svelte-check caught it on the next pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

web/src/routes/+layout.svelte

@@ -9,7 +9,7 @@
 	import { ModeWatcher } from 'mode-watcher';
 	import { Toaster } from 'svelte-sonner';
 	import { isAuthenticated } from '$lib/stores/session.svelte';
-	import { bootstrapSessionFromCookies } from '$lib/services/photoprism';
+	import { bootstrapSessionFromPhotoPrism } from '$lib/services/photoprism';
 	import { setLeftSidebarWidth, view } from '$lib/stores/view.svelte';
 	import { resizable } from '$lib/actions/resizable';
 	import { queryClient } from '$lib/queryClient';