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/season/+page.server.ts

@@ -0,0 +1,19 @@
+import type { PageServerLoad } from "./$types";
+import { getUserFavorites, addFavoriteStatusToRecipes } from "$lib/server/favorites";
+
+export const load: PageServerLoad = async ({ fetch, locals }) => {
+    let current_month = new Date().getMonth() + 1
+    const res_season = await fetch(`/api/rezepte/items/in_season/` + current_month);
+    const item_season = await res_season.json();
+    
+    // Get user favorites and session
+    const [userFavorites, session] = await Promise.all([
+        getUserFavorites(fetch, locals),
+        locals.auth()
+    ]);
+    
+    return {
+        season: addFavoriteStatusToRecipes(item_season, userFavorites),
+        session
+    };
+};

src/routes/rezepte/season/+page.svelte

@@ -14,7 +14,7 @@
 <SeasonLayout active_index={current_month-1}>
 <Recipes slot=recipes>
 	{#each rand_array(data.season) as recipe}
-		<Card {recipe} {current_month}></Card>
+		<Card {recipe} {current_month} isFavorite={recipe.isFavorite} showFavoriteIndicator={!!data.session?.user}></Card>
 	{/each}
 </Recipes>
 </SeasonLayout>

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

@@ -1,10 +0,0 @@
-import type { PageLoad } from "./$types";
-
-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 item_season = await res_season.json();
-    return {
-	    season: item_season,
-    };
-};

src/routes/rezepte/season/[month]/+page.server.ts

@@ -0,0 +1,19 @@
+import type { PageServerLoad } from "./$types";
+import { getUserFavorites, addFavoriteStatusToRecipes } from "$lib/server/favorites";
+
+export const load: PageServerLoad = async ({ fetch, locals, params }) => {
+    const res_season = await fetch(`/api/rezepte/items/in_season/` + params.month);
+    const item_season = await res_season.json();
+    
+    // Get user favorites and session
+    const [userFavorites, session] = await Promise.all([
+        getUserFavorites(fetch, locals),
+        locals.auth()
+    ]);
+    
+    return {
+        month: params.month,
+        season: addFavoriteStatusToRecipes(item_season, userFavorites),
+        session
+    };
+};

src/routes/rezepte/season/[month]/+page.svelte

@@ -12,7 +12,7 @@
 <SeasonLayout active_index={data.month -1}>
 <Recipes slot=recipes>
 	{#each rand_array(data.season) as recipe}
-		<Card {recipe} icon_override=true></Card>
+		<Card {recipe} icon_override=true isFavorite={recipe.isFavorite} showFavoriteIndicator={!!data.session?.user}></Card>
 	{/each}
 </Recipes>
 </SeasonLayout>

src/routes/rezepte/season/[month]/+page.ts

@@ -1,12 +0,0 @@
-import type { PageLoad } from "./$types";
-
-export async function load({ fetch, params }) {
-    const res_season = await fetch(`/api/rezepte/items/in_season/` + params.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();
-    return {
-	    month: params.month,
-	    season: item_season,
-    };
-};