feat(ci): add keystore signing step for production release builds

.gitea/workflows/build.yml

@@ -7,6 +7,8 @@ on:
 env:
   PATH: /opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
   ANDROID_HOME: /Users/freetlab/Library/Android/sdk
+  KEYSTORE_PATH: /Users/freetlab/.openclaw/workspace/.secure/farolero/farolero-upload.jks
+  KEYSTORE_ALIAS: upload
 
 jobs:
   analizar:
@@ -47,6 +49,20 @@ jobs:
           which flutter
           flutter --version
 
+      - name: Configurar keystore de firma
+        env:
+          KEYSTORE_PASSWORD: *** secrets.FAROLERO_KEYSTORE_PASSWORD }}
+        run: |
+          if [ ! -f "$KEYSTORE_PATH" ]; then
+            echo "ERROR: Keystore no encontrado en $KEYSTORE_PATH"
+            exit 1
+          fi
+          echo "storeFile=$KEYSTORE_PATH" > android/key.properties
+          echo "storePassword=$KEYSTORE_PASSWORD" >> android/key.properties
+          echo "keyAlias=$KEYSTORE_ALIAS" >> android/key.properties
+          echo "keyPassword=$KEYSTORE_PASSWORD" >> android/key.properties
+          echo "✅ Keystore configurado"
+
       - name: Bump versión patch + commit
         run: |
           git config user.name "ShanaiaBot"