feat: add photo selection reel for collages and app version reset

src/services/settings.ts

@@ -2,7 +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
+
 export interface AppSettings {
+  appVersion: number;
   countdownDuration: number; // in seconds
   printerIp: string;
   adminPassword: string;
@@ -30,6 +33,7 @@ export interface AppSettings {
 const settingsFile = new File(Paths.document, 'settings.json');
 
 const DEFAULT_SETTINGS: AppSettings = {
+  appVersion: APP_VERSION,
   countdownDuration: 3,
   printerIp: '192.168.1.100',
   adminPassword: '1234',
@@ -55,6 +59,13 @@ export async function loadSettings(): Promise<AppSettings> {
   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;
+    }
+
     return { ...DEFAULT_SETTINGS, ...parsed };
   } catch (e) {
     console.error('Failed to load settings, using defaults:', e);