Add favorite indicators to recipe cards and improve favorites UI

- Add heart emoji indicators to recipe cards (top-left positioning)
- Show favorites across all recipe list pages (season, category, icon, tag)
- Create favorites utility functions for server-side data merging
- Convert client-side load files to server-side for session access
- Redesign favorite button with emoji hearts (🖤/❤️) and bottom-right positioning
- Fix randomizer array mutation issue causing card display glitches
- Implement consistent favorite indicators with drop shadows for visibility

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

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

src/routes/rezepte/[name]/+page.svelte

@@ -310,13 +310,11 @@ h4{
 			{/each}
 		</div>
 		
-		<div class="tags center">
-			<FavoriteButton 
-				recipeId={data.short_name} 
-				isFavorite={data.isFavorite || false} 
-				isLoggedIn={!!data.session?.user} 
-			/>
-		</div>
+		<FavoriteButton 
+			recipeId={data.short_name} 
+			isFavorite={data.isFavorite || false} 
+			isLoggedIn={!!data.session?.user} 
+		/>
 		
 		{#if data.note}
 			<RecipeNote note={data.note}></RecipeNote>