Android: wire Firebase google-services.json into the build (client half)

Commit the client Firebase config (bizgaze-connect, package com.bizgaze.connect)
and have the Codemagic Android step copy it into android/app/ so the google-services
Gradle plugin applies and FirebaseApp initializes — fixing the root cause of the
"Default FirebaseApp is not initialized" crash. google-services.json is client-side
(ships in the APK), safe for this private repo. The service-account key stays OUT of
git (.gitignore: *firebase-adminsdk*.json / *service-account*.json) — it goes on the
server as FCM_SERVICE_ACCOUNT separately.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

codemagic.yaml

@@ -218,16 +218,24 @@ workflows:
           # camera/mic/notification permissions the web UI needs (mirrors ios-patch.sh for iOS). Tolerant + idempotent.
           node scripts/android-patch.js android/app/src/main/AndroidManifest.xml
 
-      - name: (Optional) Firebase google-services.json for FCM push
+      - name: Firebase google-services.json for FCM push
         script: |
-          cd mobile/android/app
-          if [ -n "$GOOGLE_SERVICES_JSON" ]; then
-            # Portable decode: GNU coreutils uses --decode/-d, BSD/macOS base64 uses -D.
-            echo "$GOOGLE_SERVICES_JSON" | { base64 --decode 2>/dev/null || base64 -D; } > google-services.json
-            echo "google-services.json written — FCM push enabled in this build"
+          # Place the client Firebase config into android/app/ so the google-services Gradle plugin applies and
+          # FirebaseApp initializes at runtime — WITHOUT it, PushNotifications.register() throws
+          # "Default FirebaseApp is not initialized" and crashes the app on Android. Prefer the committed file;
+          # fall back to a base64 GOOGLE_SERVICES_JSON env var. (Runs from the repo root; the Android project was
+          # generated in the previous step.)
+          DEST=mobile/android/app/google-services.json
+          if [ -f mobile/FirebaseAccount_Google/google-services.json ]; then
+            cp mobile/FirebaseAccount_Google/google-services.json "$DEST"
+            echo "google-services.json copied from repo → FCM enabled"
+          elif [ -n "$GOOGLE_SERVICES_JSON" ]; then
+            echo "$GOOGLE_SERVICES_JSON" | { base64 --decode 2>/dev/null || base64 -D; } > "$DEST"
+            echo "google-services.json written from env → FCM enabled"
           else
-            echo "No GOOGLE_SERVICES_JSON set — building WITHOUT FCM push (fine for a shell/UI test build)"
+            echo "No google-services.json found — building WITHOUT FCM push"
           fi
+          ls -l "$DEST" 2>/dev/null || echo "(no google-services.json placed)"
 
       - name: Build the debug APK
         script: |