v3.2.0: full QA fixes and in-app virtual environment

android/app/build.gradle

@@ -1,5 +1,19 @@
 apply plugin: 'com.android.application'
 
+def envOrDefault(String key, String fallback) {
+    def fromEnv = System.getenv(key)
+    if (fromEnv != null && fromEnv.trim()) return fromEnv.trim()
+    if (project.hasProperty(key) && project.property(key)?.toString()?.trim()) return project.property(key).toString().trim()
+    return fallback
+}
+
+def debugStorePass = envOrDefault('ZAI_DEBUG_STORE_PASSWORD', 'android')
+def debugKeyAlias = envOrDefault('ZAI_DEBUG_KEY_ALIAS', 'androiddebugkey')
+def debugKeyPass = envOrDefault('ZAI_DEBUG_KEY_PASSWORD', 'android')
+def releaseStorePass = envOrDefault('ZAI_RELEASE_STORE_PASSWORD', 'zaichat')
+def releaseKeyAlias = envOrDefault('ZAI_RELEASE_KEY_ALIAS', 'zai-chat')
+def releaseKeyPass = envOrDefault('ZAI_RELEASE_KEY_PASSWORD', 'zaichat')
+
 android {
     namespace = "ai.z.chat"
     compileSdk = rootProject.ext.compileSdkVersion
@@ -7,8 +21,8 @@ android {
         applicationId "ai.z.chat"
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode 22
-        versionName "3.1.2"
+        versionCode 23
+        versionName "3.2.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         aaptOptions {
             ignoreAssetsPattern = '!.svn:!.git:!.ds_store:!*.scc:.*:!CVS:!thumbs.db:!picasa.ini:!*~'
@@ -18,15 +32,15 @@ android {
     signingConfigs {
         debug {
             storeFile file('debug.keystore')
-            storePassword 'android'
-            keyAlias 'androiddebugkey'
-            keyPassword 'android'
+            storePassword debugStorePass
+            keyAlias debugKeyAlias
+            keyPassword debugKeyPass
         }
         release {
             storeFile file('release.keystore')
-            storePassword 'zaichat'
-            keyAlias 'zai-chat'
-            keyPassword 'zaichat'
+            storePassword releaseStorePass
+            keyAlias releaseKeyAlias
+            keyPassword releaseKeyPass
         }
     }