fix: camera unmount, sticker trash, update reset

src/services/settings.ts

@@ -2,10 +2,10 @@ import { File, Paths } from 'expo-file-system';
 import * as FileSystem from 'expo-file-system/legacy';
 import { FRAMES } from '../data/frames';
 
-export const APP_VERSION = 2; // Increment this whenever you want settings to reset on update
+import * as Application from 'expo-application';
 
 export interface AppSettings {
-  appVersion: number;
+  appLastUpdate: number | null;
   countdownDuration: number; // in seconds
   printerIp: string;
   adminPassword: string;
@@ -33,7 +33,7 @@ export interface AppSettings {
 const settingsFile = new File(Paths.document, 'settings.json');
 
 const DEFAULT_SETTINGS: AppSettings = {
-  appVersion: APP_VERSION,
+  appLastUpdate: null,
   countdownDuration: 3,
   printerIp: '192.168.1.100',
   adminPassword: '1234',
@@ -56,21 +56,35 @@ const DEFAULT_SETTINGS: AppSettings = {
  * Load settings from persistent storage.
  */
 export async function loadSettings(): Promise<AppSettings> {
+  let currentUpdateTime: number | null = null;
+  try {
+    const updateTime = await Application.getLastUpdateTimeAsync();
+    currentUpdateTime = updateTime ? updateTime.getTime() : null;
+  } catch (e) {
+    console.warn('Could not get app update time:', e);
+  }
+
   try {
     const content = await settingsFile.text();
     const parsed = JSON.parse(content);
     
-    // Reset to defaults if the app version has changed (app updated)
-    if (parsed.appVersion !== APP_VERSION) {
-      console.log(`Settings version mismatch (old: ${parsed.appVersion}, new: ${APP_VERSION}). Resetting to default.`);
-      return DEFAULT_SETTINGS;
+    // Reset to defaults if the app installation/update time has changed
+    // Allow a small drift margin (e.g. 5 seconds) just in case
+    if (parsed.appLastUpdate && currentUpdateTime) {
+      if (Math.abs(parsed.appLastUpdate - currentUpdateTime) > 5000) {
+        console.log(`App update detected. Resetting settings to default.`);
+        const defaults = { ...DEFAULT_SETTINGS, appLastUpdate: currentUpdateTime };
+        // Instantly save the new default settings to disk so they persist!
+        await saveSettings(defaults);
+        return defaults;
+      }
     }
 
-    return { ...DEFAULT_SETTINGS, ...parsed };
+    return { ...DEFAULT_SETTINGS, ...parsed, appLastUpdate: currentUpdateTime };
   } catch (e) {
     console.error('Failed to load settings, using defaults:', e);
   }
-  return DEFAULT_SETTINGS;
+  return { ...DEFAULT_SETTINGS, appLastUpdate: currentUpdateTime };
 }
 
 /**