Implement secure client-side favorites loading to fix nginx 502 issues

- Create client-side favorites store with secure authentication
- Remove server-side favorites fetching that caused nginx routing issues
- Update FavoriteButton to properly handle short_name/ObjectId relationship
- Use existing /api/rezepte/favorites/check endpoint for status checking
- Maintain security by requiring authentication for all favorites operations

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

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

src/routes/rezepte/+page.server.ts

@@ -1,22 +1,14 @@
 import type { PageServerLoad } from "./$types";
-import { getUserFavorites, addFavoriteStatusToRecipes } from "$lib/server/favorites";
 
-export async function load({ fetch, locals }) {
+export async function load({ fetch }) {
     let current_month = new Date().getMonth() + 1
     const res_season = await fetch(`/api/rezepte/items/in_season/` + current_month);
     const res_all_brief = await fetch(`/api/rezepte/items/all_brief`);
     const item_season = await res_season.json();
     const item_all_brief = await res_all_brief.json();
     
-    // Get user favorites and session
-    const [userFavorites, session] = await Promise.all([
-        getUserFavorites(fetch, locals),
-        locals.auth()
-    ]);
-    
     return {
-        season: addFavoriteStatusToRecipes(item_season, userFavorites),
-        all_brief: addFavoriteStatusToRecipes(item_all_brief, userFavorites),
-        session
+        season: item_season,
+        all_brief: item_all_brief
     };
 };