chore(android): rename the RuStore signing secrets ANDROID_* -> ANDROID_RUSTORE_*

The signing key is store-specific: RuStore self-signs (the cert is the app cert), while Google Play re-signs via Play App Signing (the uploaded key is only the upload key). Keep a separate key per store and name the secrets accordingly. Only the Gitea secret names change; build.gradle keeps the store-agnostic env contract (ANDROID_KEYSTORE_*), so the same build serves a future Google key from its own workflow. New names: ANDROID_RUSTORE_KEYSTORE_BASE64 / _KEYSTORE_PASSWORD / _KEY_ALIAS / _KEY_PASSWORD.

.gitea/workflows/android-build.yaml

@@ -3,7 +3,7 @@
 # a PR. It builds the native-flavoured SPA, bundles the offline dictionaries into the APK assets, and
 # assembles a release APK, uploaded as a run artifact (RuStore upload stays manual for the MVP).
 #
-# Signing degrades gracefully: with the ANDROID_KEYSTORE_* secrets present the APK is signed; without
+# Signing degrades gracefully: with the ANDROID_RUSTORE_* secrets present the APK is signed; without
 # them build.gradle produces an UNSIGNED release APK (so a dry run still proves the whole pipeline).
 # The keystore is a publication prerequisite — see deploy/README.md (Android build/release runbook).
 # The toolchain is self-provisioned here (JDK 21 + a cached Android SDK), so the runner host needs
@@ -144,7 +144,7 @@ jobs:
       - name: Decode the release keystore
         id: keystore
         env:
-          ANDROID_KEYSTORE_BASE64: ${{ secrets.ANDROID_KEYSTORE_BASE64 }}
+          ANDROID_KEYSTORE_BASE64: ${{ secrets.ANDROID_RUSTORE_KEYSTORE_BASE64 }}
         run: |
           if [ -n "$ANDROID_KEYSTORE_BASE64" ]; then
             printf '%s' "$ANDROID_KEYSTORE_BASE64" | base64 -d > "${GITHUB_WORKSPACE}/release.jks"
@@ -152,16 +152,16 @@ jobs:
             echo "keystore decoded -> signed release build"
           else
             echo "file=" >> "$GITHUB_OUTPUT"
-            echo "::warning::ANDROID_KEYSTORE_BASE64 is not set — building an UNSIGNED release APK (not installable/publishable)"
+            echo "::warning::ANDROID_RUSTORE_KEYSTORE_BASE64 secret is not set — building an UNSIGNED release APK (not installable/publishable)"
           fi
 
       - name: Assemble the release APK
         working-directory: ui/android
         env:
           ANDROID_KEYSTORE_FILE: ${{ steps.keystore.outputs.file }}
-          ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
+          ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_RUSTORE_KEYSTORE_PASSWORD }}
-          ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
+          ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_RUSTORE_KEY_ALIAS }}
-          ANDROID_KEY_PASSWORD: ${{ secrets.ANDROID_KEY_PASSWORD }}
+          ANDROID_KEY_PASSWORD: ${{ secrets.ANDROID_RUSTORE_KEY_PASSWORD }}
         run: ./gradlew assembleRelease -PversionCode=${{ steps.prep.outputs.code }} -PversionName=${{ steps.prep.outputs.name }} --console=plain
 
       - name: Upload the APK artifact

deploy/README.md

@@ -257,8 +257,8 @@ web/prod rollout — a signed APK uploaded to RuStore by hand. The build/release
   the SDK is missing or unreadable.
 - **Release keystore** (create once, **back up off-host** — losing it means the app can never be updated):
   `keytool -genkeypair -v -keystore erudit-release.jks -alias erudit -keyalg RSA -keysize 4096 -validity 10000`,
-  then set the Gitea **secrets** `ANDROID_KEYSTORE_BASE64` (`base64 -w0 erudit-release.jks`),
+  then set the Gitea **secrets** `ANDROID_RUSTORE_KEYSTORE_BASE64` (`base64 -w0 erudit-release.jks`),
-  `ANDROID_KEYSTORE_PASSWORD`, `ANDROID_KEY_ALIAS`, `ANDROID_KEY_PASSWORD`. Set the `ANDROID_RUSTORE_URL`
+  `ANDROID_RUSTORE_KEYSTORE_PASSWORD`, `ANDROID_RUSTORE_KEY_ALIAS`, `ANDROID_RUSTORE_KEY_PASSWORD`. Set the `ANDROID_RUSTORE_URL`
   variable to the store listing once published (empty until then — the in-app update button no-ops).
 - **Wire-break discipline:** the prod deploy that ships an incompatible wire change **also** bumps
   `GATEWAY_MIN_CLIENT_VERSION` to that release (see Optional variables), so an old installed APK is turned