perf: drop all_brief fetch from favorites page

Favorites page fetched both /favorites/recipes and /items/all_brief, then
stitched isFavorite flags onto allRecipes so Search could filter across
the full catalogue. But Search is invoked with favoritesOnly={true} and
hideFavoritesFilter (so it's pinned on), so it only ever returns matches
that are already in the favorites list — allRecipes was dead weight.

- drop allRes / allRecipes / favoriteIds / allRecipesWithFavorites
- Search now receives data.favorites directly
- filteredFavorites filters data.favorites by matchedRecipeIds
- use locals.session ?? locals.auth() to reuse the hook's auth lookup

TODO.md

@@ -7,7 +7,7 @@ Order = impact. Font items + app.html preload intentionally skipped.
 - [x] 1. Lucide subpath imports — convert `from '@lucide/svelte'` barrel imports to `@lucide/svelte/icons/<kebab-name>` so Vite tree-shakes per-icon (current 748 KB shared chunk)
 - [x] 2. Chart.js dynamic import in `FitnessChart.svelte` (drop 244 KB from non-stats fitness routes)
 - [x] 3. Recipe API endpoints — drop `JSON.parse(JSON.stringify(...))` double-serialize (9 endpoints). Client-side shuffle / cache headers deferred (would require rethinking hero preload + hydration)
-- [ ] 4. Favorites page — drop unnecessary `all_brief` fetch (verify consumer first)
+- [x] 4. Favorites page — drop unnecessary `all_brief` fetch (verified Search uses `favoritesOnly` so `allRecipes` was redundant)
 - [ ] 5. Replace redundant `locals.auth()` with `locals.session` across recipe/calendar/fitness loaders
 - [ ] 6. Stream fitness stats loader — return promises for slow panels
 - [ ] 7. Overview endpoint — add `.select(...)` projection, cap timeseries window

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "homepage",
-	"version": "1.46.15",
+	"version": "1.46.16",
 	"private": true,
 	"type": "module",
 	"scripts": {

src/routes/[recipeLang=recipeLang]/favorites/+page.server.ts

@@ -3,7 +3,7 @@ import { redirect } from '@sveltejs/kit';
 
 export const load: PageServerLoad = async ({ fetch, locals, params }) => {
     const apiBase = `/api/${params.recipeLang}`;
-    const session = await locals.auth();
+    const session = locals.session ?? await locals.auth();
 
     if (!session?.user?.nickname) {
         const callbackUrl = encodeURIComponent(`/${params.recipeLang}/favorites`);
@@ -11,43 +11,24 @@ export const load: PageServerLoad = async ({ fetch, locals, params }) => {
     }
 
     try {
-        const [res, allRes] = await Promise.all([
-            fetch(`${apiBase}/favorites/recipes`),
-            fetch(`${apiBase}/items/all_brief`)
-        ]);
+        const res = await fetch(`${apiBase}/favorites/recipes`);
 
         if (!res.ok) {
             return {
                 favorites: [],
-                allRecipes: [],
                 error: 'Failed to load favorites'
             };
         }
 
-        const [favorites, allRecipes] = await Promise.all([res.json(), allRes.json()]);
-
-        // Mark all favorites with isFavorite flag for filter compatibility
-        const favoritesWithFlag = favorites.map((recipe: any) => ({
-            ...recipe,
-            isFavorite: true
-        }));
-
-        // Get favorite IDs for marking in allRecipes
-        const favoriteIds = new Set(favoritesWithFlag.map((r: any) => r._id));
-        const allRecipesWithFavorites = allRecipes.map((recipe: any) => ({
-            ...recipe,
-            isFavorite: favoriteIds.has(recipe._id)
-        }));
+        const favorites = await res.json();
 
         return {
-            favorites: favoritesWithFlag,
-            allRecipes: allRecipesWithFavorites,
+            favorites: favorites.map((recipe: any) => ({ ...recipe, isFavorite: true })),
             session
         };
     } catch (e) {
         return {
             favorites: [],
-            allRecipes: [],
             error: 'Failed to load favorites'
         };
     }

src/routes/[recipeLang=recipeLang]/favorites/+page.svelte

@@ -33,12 +33,12 @@
 
     function handleSearchResults(ids: Set<string>, categories: Set<string>) {
         matchedRecipeIds = ids;
-        hasActiveSearch = ids.size < (data.allRecipes?.length || data.favorites.length);
+        hasActiveSearch = ids.size < data.favorites.length;
     }
 
     const filteredFavorites = $derived.by(() => {
         if (!hasActiveSearch) return data.favorites;
-        return data.allRecipes.filter((r: any) => matchedRecipeIds.has(r._id));
+        return data.favorites.filter((r: any) => matchedRecipeIds.has(r._id));
     });
 </script>
 
@@ -93,7 +93,7 @@
 
 <p class="to-try-link"><a href="/{data.recipeLang}/to-try">{labels.toTry} &rarr;</a></p>
 
-<Search favoritesOnly={true} lang={data.lang} recipes={data.allRecipes || data.favorites} isLoggedIn={!!data.session?.user} onSearchResults={handleSearchResults}></Search>
+<Search favoritesOnly={true} lang={data.lang} recipes={data.favorites} isLoggedIn={!!data.session?.user} onSearchResults={handleSearchResults}></Search>
 
 {#if data.error}
     <p class="empty-state">{labels.errorLoading} {data.error}</p>