fix(rn): add ADB reverse port forwarding for Metro connection

React Native Android apps connect to localhost:8081 by default, but Metro
runs on a dynamically allocated port (e.g., 8091). Add ADB reverse port
forwarding before deployment so the app can reach Metro:

  adb reverse tcp:8081 tcp:$METRO_PORT

This fixes the "Unable to load script" error shown in the app.

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

Author: abueide

examples/react-native/tests/test-suite-all-e2e.yaml

@@ -141,6 +141,20 @@ processes:
       . ${REACT_NATIVE_VIRTENV}/metro/env-all.sh
       echo "Metro port: $METRO_PORT"
 
+      # Setup ADB reverse port forwarding so app can reach Metro
+      # React Native apps connect to localhost:8081 by default, forward to actual Metro port
+      serial=""
+      state_dir="${ANDROID_RUNTIME_DIR:-.devbox/virtenv}/${SUITE_NAME:-default}"
+      if [ -f "$state_dir/emulator-serial.txt" ]; then
+        serial="$(cat "$state_dir/emulator-serial.txt")"
+      fi
+      if [ -z "$serial" ]; then
+        serial="emulator-${EMU_PORT:-5554}"
+      fi
+
+      echo "Setting up Metro port forwarding: 8081 -> $METRO_PORT (serial: $serial)"
+      adb -s "$serial" reverse tcp:8081 tcp:$METRO_PORT
+
       # Deploy using android.sh (APK already built by build-android)
       android.sh deploy
     depends_on:

examples/react-native/tests/test-suite-android-e2e.yaml

@@ -94,6 +94,20 @@ processes:
       . ${REACT_NATIVE_VIRTENV}/metro/env-android.sh
       echo "Metro port: $METRO_PORT"
 
+      # Setup ADB reverse port forwarding so app can reach Metro
+      # React Native apps connect to localhost:8081 by default, forward to actual Metro port
+      serial=""
+      state_dir="${ANDROID_RUNTIME_DIR:-.devbox/virtenv}/${SUITE_NAME:-default}"
+      if [ -f "$state_dir/emulator-serial.txt" ]; then
+        serial="$(cat "$state_dir/emulator-serial.txt")"
+      fi
+      if [ -z "$serial" ]; then
+        serial="emulator-${EMU_PORT:-5554}"
+      fi
+
+      echo "Setting up Metro port forwarding: 8081 -> $METRO_PORT (serial: $serial)"
+      adb -s "$serial" reverse tcp:8081 tcp:$METRO_PORT
+
       # Deploy using android.sh (APK already built by build-android)
       android.sh deploy
     depends_on: