Cap LITE at one FAVORITED recipe

Freeing the FAVORITED tab for LITE put no ceiling on the list, and a list
of your own picks is what PRO is selling. One star is free, the second
names the build; un-starring stays open so the list can always come back
under the limit.

App.tsx

@@ -26,7 +26,7 @@ import { processAndExportPhoto } from './src/utils/exportEngine';
 import { processAndExportPhotoNative } from './src/utils/nativeExport';
 import { exportRecipeXml, importRecipeXml } from './src/utils/recipeShare';
 import { PARAM_DEFS } from './src/utils/paramDefs';
-import { IS_PRO, LITE_MARK, LITE_RECIPE_LIMIT, proLookInUse } from './src/utils/entitlement';
+import { IS_PRO, LITE_FAVORITE_LIMIT, LITE_MARK, LITE_RECIPE_LIMIT, proLookInUse } from './src/utils/entitlement';
 import UltraWide from './modules/recipescam-ultrawide';
 
 // @ts-ignore
@@ -949,6 +949,12 @@ export default function App() {
   // untouched either way.
   const handleToggleFavorite = (id: string) => {
     const on = !favoriteIds.includes(id);
+    // LITE gets one favorite; PRO is what buys a list. Un-starring is never
+    // gated, so the way back under the limit is always open.
+    if (on && !pro && favoriteIds.length >= LITE_FAVORITE_LIMIT) {
+      promptProFeature(`Favoriting more than ${LITE_FAVORITE_LIMIT} recipe`);
+      return;
+    }
     setFavoriteIds((ids) => (on ? [...ids, id] : ids.filter((x) => x !== id)));
     setFavoriteId(id, on).catch((e) => console.warn('Failed to save favorite:', e));
   };

src/utils/entitlement.ts

@@ -16,9 +16,9 @@ export const IS_PRO = IS_PRO_BUILD;
 //
 // What LITE owns outright: the eight film sims, the bundled recipes, its own
 // recipes up to LITE_RECIPE_LIMIT, its own watermark text (in one face), the
-// plain frames and every parameter. What needs PRO: the three printed frames,
-// the GPS stamp, the platform's other fonts, and the next recipe past the
-// limit.
+// plain frames, one favorite and every parameter. What needs PRO: the three
+// printed frames, the GPS stamp, the platform's other fonts, the next recipe
+// past the limit, and the second favorite.
 
 // Frames on the LITE side: the plain export only. The three printed looks are
 // PRO (the artwork/card geometry is the paid half of the FRAME tab).
@@ -28,6 +28,11 @@ export const PRO_FRAMES: FrameId[] = ['classic-white', 'polaroid', 'wallframe'];
 // free, deleting one is PRO — so a LITE list only ever grows to this size.
 export const LITE_RECIPE_LIMIT = 3;
 
+// FAVORITED is a LITE feature, but only one deep: the first star is free, the
+// second needs PRO. Un-starring is always free, so the list can always come
+// back under the limit.
+export const LITE_FAVORITE_LIMIT = 1;
+
 // Burned into every LITE export, bottom-right of the photo/frame area. Fractions
 // of the stamp canvas, same space the custom mark uses. The user's own mark is
 // free on top of it.