feat(frame): rename the RETRO POLAROID chip to RETRO INSTANT

src/components/Viewfinder.tsx

@@ -144,7 +144,7 @@ export interface ViewfinderHandle {
   flushExposureBias(): Promise<void>;
   /**
    * Current interactive photo reposition inside a framed library window
-   * (RETRO POLAROID / WALL FRAME): scale s (>=1) and the visible window-center
+   * (RETRO INSTANT / WALL FRAME): scale s (>=1) and the visible window-center
    * as 0..1 fractions of the photo's cover plane (the area that fills the
    * window at 1x). Null when no framed window is showing or the photo is
    * unzoomed. App passes it to the export engine so the saved file shows
@@ -847,7 +847,7 @@ const Viewfinder = forwardRef<ViewfinderHandle, ViewfinderProps>(function Viewfi
     () => createSynchronizable<number[]>([0, 0, 0, 0, 0, 0, 0, 0.5, 0.5]),
     []
   );
-  // RETRO POLAROID on the live camera is NOT drawn in the frame pipeline: that
+  // RETRO INSTANT on the live camera is NOT drawn in the frame pipeline: that
   // canvas is an offscreen surface in frame-pixel space which RNSkia later
   // cover-fits onto the view, so frame-space geometry overflows the screen and
   // cannot be aligned with the dp-space overlays. The camera just renders the
@@ -2249,7 +2249,7 @@ const Viewfinder = forwardRef<ViewfinderHandle, ViewfinderProps>(function Viewfi
   const cinemaOn = cinemaEffect != null && !!cinemaParams;
   const useShaderPass = !!imageFitRect && ((toneEffect != null && toneOn) || cinemaOn);
 
-  // RETRO POLAROID (library): the whole picture is contain-fitted into the
+  // RETRO INSTANT (library): the whole picture is contain-fitted into the
   // card's photo window — nothing is masked or cropped, and the card is
   // centered on the black background like a physical print. The window keeps
   // the photo aspect ratio, so fit="fill" never distorts.

src/utils/exportEngine.ts

@@ -425,7 +425,7 @@ export async function processAndExportPhoto(
       }
     }
 
-    // 7. Frame. RETRO POLAROID is not a border drawn on the photo: the whole
+    // 7. Frame. RETRO INSTANT is not a border drawn on the photo: the whole
     // processed picture is composited, uncropped, into the window of a bigger
     // off-white card (real print proportions, see frameUtils) — the export IS
     // the card, with the photo scaled to the window so it keeps ~WIN_W of the

src/utils/frameUtils.ts

@@ -9,7 +9,7 @@ export interface FrameDefinition {
 export const FRAMES: FrameDefinition[] = [
   { id: 'none', name: 'NO FRAME' },
   { id: 'classic-white', name: 'CLASSIC BORDER' },
-  { id: 'polaroid', name: 'RETRO POLAROID' },
+  { id: 'polaroid', name: 'RETRO INSTANT' },
   { id: 'wallframe', name: 'WALL FRAME' },
 ];