fix(sim): rebuild the six film-sim color matrices to match the stock looks

Provia/Velvia/Astia/Classic Chrome/Classic Neg/Acros each get their own
primaries+cross-talk matrix measured against the pipeline, plus a split-tone
stage (shadow/highlight tint uniforms) for Classic Chrome's teal and Classic
Neg's green-cyan shadows vs warm highlights.

src/utils/exportEngine.ts

@@ -5,7 +5,7 @@ import * as MediaLibrary from 'expo-media-library/legacy';
 import { Asset } from 'expo-asset';
 import { Recipe, GPSInfo, FrameId, AspectRatio, ASPECT_RATIO_W_H, CropRect } from '../types';
 import { getSkiaColorMatrix, applyExposureGain } from './colorUtils';
-import { TONE_SKSL, getToneUniforms, toneIsActive } from './toneShader';
+import { TONE_SKSL, getToneUniforms, toneIsActive, toneUniformArray } from './toneShader';
 import { CINEMA_SKSL, getCinemaUniforms, cinemaIsActive } from './cinemaShader';
 import { drawFrameOnCanvas, polaroidLayout, POLAROID_CARD, POLAROID_WIN_W, wallframeLayout, WALLFRAME_W, WALLFRAME_H, WALLFRAME_LAND_W, WALLFRAME_LAND_H } from './frameUtils';
 import { patchJpegDpi } from './jpegDpi';
@@ -218,7 +218,10 @@ export async function processAndExportPhoto(
     // through the shader) when a real shader exists. If the RuntimeEffect fails
     // to compile / makeShaderWithChildren returns null, paint has no shader and a
     // drawRect would fill solid opaque color → black/blank output.
-    const tone = getToneUniforms(adjustments);
+    // The stock's own tone pass (Classic Neg split tone, Classic Chrome shadow
+    // crush) rides along here, so those two recipes export with the pass even
+    // when every user knob is 0.
+    const tone = getToneUniforms(adjustments, recipe.baseFilter);
     const hasTone = toneIsActive(tone);
     let toneShader: SkShader | null = null;
     if (hasTone) {
@@ -235,7 +238,7 @@ export async function processAndExportPhoto(
           FilterMode.Linear,
           MipmapMode.None
         );
-        toneShader = toneEffect.makeShaderWithChildren([tone.dr, tone.hl, tone.sh, tone.vib], [imageShader]);
+        toneShader = toneEffect.makeShaderWithChildren(toneUniformArray(tone), [imageShader]);
         if (toneShader) {
           paint.setShader(toneShader);
         } else {