chore: bump version to 2.3.7 (build 238)

- Updated versionName from 2.3.6.1 to 2.3.7
- Incremented versionCode from 237 to 238

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: graycreate

config.gradle

@@ -1,7 +1,7 @@
 ext {
     app = [
-            versionCode: 237,
-            versionName: "2.3.6.1"
+            versionCode: 238,
+            versionName: "2.3.7"
     ]
     android = [
             supportVersion: '26.1.0'