docs: complete 100% kdoc coverage and update app branding

app/src/main/java/com/example/retroha/BaseActivity.kt

@@ -4,6 +4,11 @@ import android.content.Context
 import android.os.Bundle
 import com.example.retroha.i18n.LocaleHelper
 
+/**
+ * Base activity class that provides automatic localization support.
+ * All activities in the application should extend this class to ensure
+ * dynamic language changes are applied correctly.
+ */
 abstract class BaseActivity : Activity() {
     override fun attachBaseContext(newBase: Context) {
         super.attachBaseContext(LocaleHelper.setLocale(newBase))