Update @auth/sveltekit to latest stable version 1.10.0

- Upgraded @auth/sveltekit from 0.14.0 to 1.10.0
- Updated session API from event.locals.getSession() to event.locals.auth()
- Fixed TypeScript definitions for new auth API in app.d.ts
- Updated layout server load functions to use LayoutServerLoad type
- Fixed session callbacks with proper token type casting
- Switched to generic OIDC provider config to resolve issuer validation issues
- All auth functionality now working with latest Auth.js version

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/hooks.server.ts

@@ -10,7 +10,7 @@ import * as auth from "./auth"
 async function authorization({ event, resolve }) {
 	// Protect any routes under /authenticated
 	if (event.url.pathname.startsWith('/rezepte/edit') || event.url.pathname.startsWith('/rezepte/add')) {
-   const session = await event.locals.getSession();
+   const session = await event.locals.auth();
 		if (!session) {
 			redirect(303, '/auth/signin');
 		}