Update camera screens, configuration, and build setup

src/services/settings.ts

@@ -1,4 +1,4 @@
-import * as FileSystem from 'expo-file-system/legacy';
+import { File, Paths } from 'expo-file-system';
 
 export interface AppSettings {
   countdownDuration: number; // in seconds
@@ -7,7 +7,7 @@ export interface AppSettings {
   kioskModeEnabled: boolean;
 }
 
-const SETTINGS_FILE = `${FileSystem.documentDirectory}settings.json`;
+const settingsFile = new File(Paths.document, 'settings.json');
 
 const DEFAULT_SETTINGS: AppSettings = {
   countdownDuration: 3,
@@ -21,9 +21,8 @@ const DEFAULT_SETTINGS: AppSettings = {
  */
 export async function loadSettings(): Promise<AppSettings> {
   try {
-    const fileInfo = await FileSystem.getInfoAsync(SETTINGS_FILE);
-    if (fileInfo.exists) {
-      const content = await FileSystem.readAsStringAsync(SETTINGS_FILE);
+    if (settingsFile.exists) {
+      const content = await settingsFile.text();
       const parsed = JSON.parse(content);
       return { ...DEFAULT_SETTINGS, ...parsed };
     }
@@ -39,7 +38,7 @@ export async function loadSettings(): Promise<AppSettings> {
 export async function saveSettings(settings: AppSettings): Promise<void> {
   try {
     const content = JSON.stringify(settings, null, 2);
-    await FileSystem.writeAsStringAsync(SETTINGS_FILE, content);
+    settingsFile.write(content);
     console.log('Settings saved successfully:', content);
   } catch (e) {
     console.error('Failed to save settings:', e);