Sell PRO as an in-app unlock, take shared photos, and let FX run negative

- One free Play app (com.locphamtran.recipescamera) with an expo-iap PRO
  unlock, replacing the paid apk for the store channel
- Android SEND/SEND_MULTIPLE share target feeds photos into the editor,
  on cold start and on resume
- BACK button in the TopBar and press-and-hold PEEK replace the chip row
- NOISE REDUCTION and SHARPENING accept -10: a negative SHARPENING softens
  the frame before the grain pass, a negative NOISE REDUCTION re-grains it,
  in the Skia engine, the live preview and the Kotlin export path alike

src/types/index.ts

@@ -71,13 +71,13 @@ export interface ColorAdjustments {
   wbBlue?: number; // Fuji WB fine-tune, Blue axis (-9..9) — extra blue-channel gain
   highlight: number; // -10 to +10 (- pulls highlights down / roll, + brightens)
   shadow: number; // -10 to +10 (+ lifts shadows, - deepens)
-  denoise: number; // 0 to 10 (mapped to blur sigma)
+  denoise: number; // -10 to +10 (+ = blur sigma; - = add film grain back)
   clarity: number; // -10 to +10 (mapped to matrix convolution / bloom)
   grain: number; // 0 to 10 (mapped to noise turbulence opacity/scale)
   colorChrome: 'none' | 'weak' | 'strong'; // Chrome effect
   colorChromeBlue: 'none' | 'weak' | 'strong'; // Chrome effect (Blue)
   dynamicRange: 'auto' | 100 | 200 | 400; // Fuji-style DR tone curve (auto/100 = no extra curve)
-  sharpening: number; // 0 to 10 (output screen sharpen strength)
+  sharpening: number; // -10 to +10 (+ = screen sharpen; - = soften the frame)
   hdf?: number; // 0 to 10 (Highlight Diffusion Filter: glow on the highlights only)
   vignette?: number; // 0 to 10 (darken the four corners; 0 = off)
   vibrance?: number; // -10 to +10 (chroma-masked saturation: vivid colours move least)