Initial commit: parksmarter-client + BigBrainParking app

Reverse-engineered ParkSmarter API client (TypeScript, live-verified) plus a
de-Googled Expo/React Native app for GrapheneOS: MapLibre meter map with GPS,
VisionCamera QR kiosk scanning with save/share, local session-expiry reminders,
UnifiedPush wiring, and Gitea CI to publish signed APKs for Obtainium.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.gitea/workflows/build-apk.yml

@@ -0,0 +1,62 @@
+# Build a signed release APK and publish it as a Gitea/Forgejo release.
+# Obtainium then tracks this repo's releases and offers updates.
+#
+# Triggers on any tag like v0.1.0. Requires a self-hosted Actions runner that has
+# (or a container image that provides) the Android SDK + JDK 17 + Node 20.
+#
+# Required repo secrets (Settings -> Actions -> Secrets):
+#   ANDROID_KEYSTORE_B64   base64 of your release keystore (keep this key forever —
+#                          Obtainium/F-Droid pin the signer; a new key = users must reinstall)
+#   ANDROID_KEYSTORE_PASSWORD
+#   ANDROID_KEY_ALIAS
+#   ANDROID_KEY_PASSWORD
+#
+# Generate the keystore once, locally:
+#   keytool -genkeypair -v -keystore bigbrainparking.keystore \
+#     -alias bigbrainparking -keyalg RSA -keysize 2048 -validity 10000
+#   base64 -w0 bigbrainparking.keystore   # -> ANDROID_KEYSTORE_B64
+
+name: build-apk
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    # A container with Android SDK + Node preinstalled keeps the runner simple:
+    container:
+      image: reactnativecommunity/react-native-android:latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build the API client
+        run: npm run build --workspace parksmarter-client
+
+      - name: Restore signing keystore
+        run: |
+          echo "${{ secrets.ANDROID_KEYSTORE_B64 }}" | base64 -d > "$PWD/app/release.keystore"
+
+      - name: Expo prebuild (generate android/)
+        working-directory: app
+        run: npx expo prebuild --platform android --no-install
+
+      - name: Assemble signed release
+        working-directory: app/android
+        env:
+          BBP_UPLOAD_STORE_FILE: ../release.keystore
+          BBP_UPLOAD_STORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
+          BBP_UPLOAD_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
+          BBP_UPLOAD_KEY_PASSWORD: ${{ secrets.ANDROID_KEY_PASSWORD }}
+        run: ./gradlew assembleRelease --no-daemon
+
+      - name: Publish release with APK
+        uses: akkuman/gitea-release-action@v1
+        with:
+          files: app/android/app/build/outputs/apk/release/*.apk
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}