Fix Android emulation and runtime errors for both apps

- Add emulator management scripts (start/stop/status) with logging to /tmp
- Fix AVD config: enable GPU acceleration, increase RAM to 4096M
- Update babel-preset-expo 9.3.2 -> 55.0.8 to fix RN 0.83 private methods
  support without breaking polyfills
- Add Android package name to expo app.json
- Fix Flutter startup crash: call WidgetsFlutterBinding.ensureInitialized
  before accessing platform channels in db init

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

todo-expo/package.json

@@ -15,6 +15,7 @@
     "@expo/vector-icons": "^15.0.2",
     "@react-navigation/native": "^6.1.6",
     "@react-navigation/native-stack": "^6.9.12",
+    "babel-preset-expo": "^55.0.8",
     "create-react-class": "^15.7.0",
     "expo": "^55.0.2",
     "expo-cli": "^6.3.8",
@@ -30,6 +31,9 @@
     "react-native-web": "^0.21.0"
   },
   "devDependencies": {
+    "@babel/plugin-transform-class-properties": "^7.28.6",
+    "@babel/plugin-transform-private-methods": "^7.28.6",
+    "@babel/plugin-transform-private-property-in-object": "^7.28.6",
     "shadow-cljs": "^2.23.3"
   },
   "private": true