revert: 恢复签名密码默认值，无需额外配置 Secret

.github/workflows/release.yml

@@ -21,10 +21,6 @@ jobs:
       - name: Decode Keystore
         run: echo "${{ secrets.KEYSTORE_BASE64 }}" | base64 -d > release.jks
       - name: Build Release APK
-        env:
-          KEYSTORE_PASSWORD: ${{ secrets.KEYSTORE_PASSWORD }}
-          KEYSTORE_ALIAS: ${{ secrets.KEYSTORE_ALIAS }}
-          KEY_PASSWORD: ${{ secrets.KEY_PASSWORD }}
         run: |
           chmod +x gradlew
           ./gradlew assembleRelease

app/build.gradle.kts

@@ -26,9 +26,9 @@ android {
     signingConfigs {
         create("release") {
             storeFile = rootProject.file("release.jks")
-            storePassword = System.getenv("KEYSTORE_PASSWORD") ?: ""
+            storePassword = System.getenv("KEYSTORE_PASSWORD") ?: "RainyToken2026!"
             keyAlias = System.getenv("KEYSTORE_ALIAS") ?: "rainy"
-            keyPassword = System.getenv("KEY_PASSWORD") ?: ""
+            keyPassword = System.getenv("KEY_PASSWORD") ?: "RainyToken2026!"
         }
     }