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>

scripts/emu-status.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+# Check Android emulator status
+export ANDROID_HOME="$HOME/Android/Sdk"
+export PATH="$ANDROID_HOME/emulator:$ANDROID_HOME/platform-tools:$PATH"
+
+echo "=== ADB Devices ==="
+adb devices 2>/dev/null || echo "adb not running"
+
+echo ""
+echo "=== Emulator Processes ==="
+ps aux | grep -E "(qemu-system|emulator)" | grep -v grep || echo "No emulator running"
+
+echo ""
+echo "=== Boot Status ==="
+if adb devices 2>/dev/null | grep -q "emulator"; then
+    echo "boot_completed: $(adb shell getprop sys.boot_completed 2>/dev/null | tr -d '\r')"
+    echo "boot_anim: $(adb shell getprop init.svc.bootanim 2>/dev/null | tr -d '\r')"
+    echo "API level: $(adb shell getprop ro.build.version.sdk 2>/dev/null | tr -d '\r')"
+else
+    echo "No emulator connected"
+fi
+
+echo ""
+echo "=== Recent Boot Log ==="
+tail -10 /tmp/emulator-boot.log 2>/dev/null || echo "No boot log"
+
+echo ""
+echo "=== Recent Emulator Log (last 10 lines) ==="
+tail -10 /tmp/emulator.log 2>/dev/null || echo "No emulator log"