fix: use release keystore in CI when RELEASE_STORE_FILE is set

The build.gradle now reads RELEASE_STORE_FILE, RELEASE_STORE_PASSWORD,
RELEASE_KEY_ALIAS, and RELEASE_KEY_PASSWORD env vars for release signing.
Falls back to debug keystore for local development.

Also updates whatsnew for v0.4.1.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

android/app/build.gradle

@@ -81,6 +81,8 @@ def enableMinifyInReleaseBuilds = (findProperty('android.enableMinifyInReleaseBu
  */
 def jscFlavor = 'io.github.react-native-community:jsc-android:2026004.+'
 
+apply from: new File(["node", "--print", "require('path').dirname(require.resolve('@sentry/react-native/package.json'))"].execute().text.trim(), "sentry.gradle")
+
 android {
     ndkVersion rootProject.ext.ndkVersion
 
@@ -92,8 +94,8 @@ android {
         applicationId 'ai.opencode.mobile'
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode 1
-        versionName "1.0.0"
+        versionCode 4
+        versionName "0.4.1"
 
         buildConfigField "String", "REACT_NATIVE_RELEASE_LEVEL", "\"${findProperty('reactNativeReleaseLevel') ?: 'stable'}\""
     }
@@ -104,8 +106,8 @@ android {
             keyAlias 'androiddebugkey'
             keyPassword 'android'
         }
-        release {
-            if (System.getenv("RELEASE_STORE_FILE")) {
+        if (System.getenv("RELEASE_STORE_FILE")) {
+            release {
                 storeFile file(System.getenv("RELEASE_STORE_FILE"))
                 storePassword System.getenv("RELEASE_STORE_PASSWORD")
                 keyAlias System.getenv("RELEASE_KEY_ALIAS")
@@ -118,7 +120,7 @@ android {
             signingConfig signingConfigs.debug
         }
         release {
-            signingConfig System.getenv("RELEASE_STORE_FILE") ? signingConfigs.release : signingConfigs.debug
+            signingConfig signingConfigs.findByName('release') ?: signingConfigs.debug
             def enableShrinkResources = findProperty('android.enableShrinkResourcesInReleaseBuilds') ?: 'false'
             shrinkResources enableShrinkResources.toBoolean()
             minifyEnabled enableMinifyInReleaseBuilds