feat(wearos): add release signing via EAS credentials.json

scripts/build-wearos.sh

@@ -30,6 +30,21 @@ cd "$WEAR_DIR"
 echo "Building WearOS ($PROFILE) v$VERSION ($VERSION_CODE)..."
 
 if [ "$PROFILE" = "release" ]; then
+  if [ ! -f "$WEAR_DIR/../credentials.json" ]; then
+    echo "credentials.json not found. Downloading from EAS..."
+    cd "$PROJECT_ROOT"
+    eas credentials --platform android --non-interactive 2>/dev/null || {
+      echo "Auto-download failed. Run manually:"
+      echo "  eas credentials --platform android"
+      echo "  → Choose 'credentials.json: Upload/Download credentials'"
+      echo "  → Choose 'Download credentials from EAS to credentials.json'"
+      echo "  Then: cp credentials.json targets/wearos/credentials.json"
+      exit 1
+    }
+    cp credentials.json "$WEAR_DIR/credentials.json"
+    echo "credentials.json copied to targets/wearos/"
+    cd "$WEAR_DIR"
+  fi
   ./gradlew assembleRelease -PversionName="$VERSION" -PversionCode="$VERSION_CODE"
   APK_PATH="app/build/outputs/apk/release/app-release.apk"
 else