Keep the dialled-in look when swapping film simulations

App.tsx

@@ -402,6 +402,19 @@ export default function App() {
     // never flip the watermark on/off.
   };
 
+  // Picking a film sim swaps the look only: everything the user dialled in on
+  // the LIGHT/WB/FX tabs and the frame they picked stay exactly as they are.
+  // A saved recipe still loads its own stored values (that is what saving it
+  // was for). Same trick as the session restore below: set the recipe without
+  // applyRecipe, which would snap the sliders back to the sim's canonical set.
+  const handleSelectRecipe = (recipe: Recipe) => {
+    if (!FILM_SIMS.some((s) => s.id === recipe.id)) {
+      applyRecipe(recipe);
+      return;
+    }
+    setSelectedRecipe({ ...recipe, adjustments, frameId: selectedFrame });
+  };
+
   // The recipe exactly as the user picked it. `selectedRecipe` is NOT a safe
   // copy of it: every slider move rewrites its `adjustments` in place
   // (handleUpdateAdjustments), so the canonical values only survive in the
@@ -1084,7 +1097,7 @@ export default function App() {
               onOpenParamChange={setOpenParamKey}
               currentBaseFilter={selectedRecipe?.baseFilter}
               onCreateRecipe={handleCreateRecipe}
-              onSelectRecipe={applyRecipe}
+              onSelectRecipe={handleSelectRecipe}
               onUpdateAdjustments={handleUpdateAdjustments}
               onUpdateFrame={handleUpdateFrame}
               onToggleGeotag={handleToggleGeotag}