fix proguard

mobile/android/app/build.gradle

@@ -81,6 +81,7 @@ android {
 
     release {
       signingConfig signingConfigs.release
+      proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
     }
   }
   namespace 'app.alextran.immich'

mobile/android/app/proguard-rules.pro

@@ -36,4 +36,12 @@
 ##---------------End: proguard configuration for Gson  ----------
 
 # Keep all widget model classes and their fields for Gson
--keep class app.alextran.immich.widget.model.** { *; }
+-keep class app.alextran.immich.widget.model.** { *; }
+
+##---------------Begin: proguard configuration for ok_http JNI ----------
+# The ok_http Dart plugin accesses OkHttp and Okio classes via JNI
+# string-based reflection (JClass.forName), which R8 cannot trace.
+-keep class okhttp3.** { *; }
+-keep class okio.** { *; }
+-keep class com.example.ok_http.** { *; }
+##---------------End: proguard configuration for ok_http JNI ----------