Refactor mobile to fix dependency resolution and add polyfills

Update Expo and React dependencies to compatible versions. Create a
custom Metro config to resolve module conflicts in the workspace and
map Jest modules to local node_modules.

Add a SharedArrayBuffer polyfill for older runtimes and introduce an
adapter for expo-notifications to abstract direct imports.

apps/mobile/metro.config.js

@@ -0,0 +1,27 @@
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { getDefaultConfig } from 'expo/metro-config.js';
+
+const projectRoot = path.dirname(fileURLToPath(import.meta.url));
+const workspaceRoot = path.resolve(projectRoot, '../..');
+
+const config = getDefaultConfig(projectRoot);
+
+config.resolver.disableHierarchicalLookup = true;
+config.resolver.nodeModulesPaths = [
+  path.resolve(projectRoot, 'node_modules'),
+  path.resolve(workspaceRoot, 'node_modules'),
+];
+config.resolver.extraNodeModules = {
+  react: path.resolve(projectRoot, 'node_modules/react'),
+  'react-test-renderer': path.resolve(projectRoot, 'node_modules/react-test-renderer'),
+  'react-native-safe-area-context': path.resolve(projectRoot, 'node_modules/react-native-safe-area-context'),
+  'react-native-screens': path.resolve(projectRoot, 'node_modules/react-native-screens'),
+  '@react-native-async-storage/async-storage': path.resolve(
+    projectRoot,
+    'node_modules/@react-native-async-storage/async-storage',
+  ),
+  'expo-application': path.resolve(projectRoot, 'node_modules/expo-notifications/node_modules/expo-application'),
+};
+
+export default config;