Startup mode default/last-session; GPS watermark default OFF; shutter OFF truly silent

- Settings STARTUP MODE chips (AsyncStorage startup_mode): default = clean camera
  + PROVIA neutral 4:3, last = restore full session look.
- initSession: resolve sim-* recipe ids via FILM_SIMS (fix clobber of session
  ratio/adjustments to 4:3 canonical); restore via setSelectedRecipe not
  applyRecipe so user tweaks (frame/geotag/ratio) survive restore.
- applyDefaultStartup turns GPS watermark OFF (user-requested default).
- Shutter: OFF must not play click on must-play-policy devices. VisionCamera
  v5.2.3 HybridPhotoOutput.kt plays MediaActionSound itself gated by
  (enableShutterSound ?: true) || mustPlayShutterSound — on Xiaomi mustPlay=true
  so OFF still clicked. Both capture paths now gate on enableShutterSound != false.
  node_modules patch not trackable -> artifacts/patches/vision-camera-shutter-silent.patch.
  Verified on Xiaomi 12S Ultra: log SND user=false -> play=false; cold-start
  DEFAULT shows GPS WATERMARK OFF.

App.tsx

@@ -16,9 +16,9 @@ import ToolRail, { TabId } from './src/components/ToolRail';
 import SettingsModal from './src/components/SettingsModal';
 import PhotoViewerModal from './src/components/PhotoViewerModal';
 
-import { Recipe, ColorAdjustments, FrameId, GPSInfo, AspectRatio, MeterMode, PhotoEntry, ShutterSound } from './src/types';
+import { Recipe, ColorAdjustments, FrameId, GPSInfo, AspectRatio, MeterMode, PhotoEntry, ShutterSound, StartupMode } from './src/types';
 import { getAllRecipes, saveCustomRecipe, deleteCustomRecipe } from './src/utils/storageUtils';
-import { DEFAULT_ADJUSTMENTS } from './src/utils/defaultRecipes';
+import { DEFAULT_ADJUSTMENTS, FILM_SIMS, filmSimToRecipe } from './src/utils/defaultRecipes';
 import { getCurrentGPS, requestLocationPermissions } from './src/utils/locationUtils';
 import { resolvePhotoGPS } from './src/utils/photoGps';
 import { processAndExportPhoto } from './src/utils/exportEngine';
@@ -29,6 +29,7 @@ import { PARAM_DEFS } from './src/utils/paramDefs';
 import './global.css';
 
 const SESSION_KEY = 'saved_session';
+const STARTUP_MODE_KEY = 'startup_mode';
 
 // P5: native Kotlin export path. EXPO_PUBLIC_NATIVE_EXPORT=1 swaps the Skia
 // render engine for the RecipesCamExport native pipeline (same look contract,
@@ -100,6 +101,9 @@ export default function App() {
   const [settingsVisible, setSettingsVisible] = useState(false);
   // Shutter click: only OFF/ON (no volume API on Android). Applied at capture.
   const [shutterSound, setShutterSound] = useState<ShutterSound>('on');
+  // Startup behavior: 'default' = PROVIA neutral at 4:3 camera; 'last' = restore
+  // previous session from AsyncStorage. Default is 'default'.
+  const [startupMode, setStartupMode] = useState<StartupMode>('default');
   const photoSeq = useRef(0);
   const [isProcessing, setIsProcessing] = useState(false);
   // Short shutter-burst lock: guards the capturePhotoToFile calls from
@@ -195,6 +199,34 @@ export default function App() {
     const list = await getAllRecipes();
     setRecipes(list);
 
+    // Startup mode: 'default' opens camera + PROVIA film sim (neutral
+    // adjustments, DEFAULT_ADJUSTMENTS) at 4:3. 'last' restores the previous
+    // session from AsyncStorage; with no saved session it falls back to the
+    // same clean default state.
+    let startup: StartupMode = 'default';
+    try {
+      const raw = await AsyncStorage.getItem(STARTUP_MODE_KEY);
+      if (raw === 'last') startup = 'last';
+    } catch (e) {
+      console.warn('Failed to read startup mode:', e);
+    }
+    setStartupMode(startup);
+
+    const applyDefaultStartup = () => {
+      setMode('camera');
+      setLibraryImageUri(null);
+      setAspectRatio('4:3');
+      const provia = FILM_SIMS.find((f) => f.id === 'sim-provia');
+      if (provia) applyRecipe(filmSimToRecipe(provia));
+      // Clean camera start: GPS watermark stays OFF until the user opts in.
+      setUseGeotag(false);
+    };
+
+    if (startup === 'default') {
+      applyDefaultStartup();
+      return;
+    }
+
     let session: any = null;
     try {
       const raw = await AsyncStorage.getItem(SESSION_KEY);
@@ -230,14 +262,22 @@ export default function App() {
       if (session.shutterSound === 'on' || session.shutterSound === 'off') setShutterSound(session.shutterSound);
       if (session.gpsInfo) setGpsInfo(session.gpsInfo);
       if (session.selectedRecipeId) {
-        restoredRecipe = list.find((r: Recipe) => r.id === session.selectedRecipeId) || null;
+        // Film sims are never persisted in the recipe list (sims applied on the
+        // fly) — resolve sim ids via FILM_SIMS, real recipes via the list.
+        const sim = FILM_SIMS.find((f) => f.id === session.selectedRecipeId);
+        restoredRecipe = sim
+          ? filmSimToRecipe(sim)
+          : list.find((r: Recipe) => r.id === session.selectedRecipeId) || null;
       }
     }
 
     if (restoredRecipe) {
-      applyRecipe(restoredRecipe);
-    } else if (list.length > 0) {
-      applyRecipe(list[0]);
+      // Recipe identity restored; the look (adjustments/frame/geotag/ratio)
+      // stays exactly as saved in the session above — applyRecipe would reset
+      // them to the recipe's canonical values and drop the user's tweaks.
+      setSelectedRecipe(restoredRecipe);
+    } else {
+      applyDefaultStartup();
     }
   };
 
@@ -315,6 +355,11 @@ export default function App() {
     }
   };
 
+  const handleStartupMode = (mode: StartupMode) => {
+    setStartupMode(mode);
+    AsyncStorage.setItem(STARTUP_MODE_KEY, mode).catch(() => {});
+  };
+
   // Latest-rawEnabled ref so the stable session-error callback below can read
   // the live toggle without re-subscribing the Camera session on every render.
   const rawEnabledRef = useRef(rawEnabled);
@@ -851,6 +896,8 @@ export default function App() {
         onMeterModeChange={setMeterMode}
         shutterSound={shutterSound}
         onShutterSound={setShutterSound}
+        startupMode={startupMode}
+        onStartupMode={handleStartupMode}
       />
 
       {/* Session photo viewer (swipe across captured/exported photos) */}