Refactor to Compose based UI

app/src/other/java/io/nekohasekai/sfa/vendor/Vendor.kt

@@ -4,18 +4,25 @@ import android.app.Activity
 import androidx.camera.core.ImageAnalysis
 
 object Vendor : VendorInterface {
-
     override fun checkUpdateAvailable(): Boolean {
         return false
     }
 
-    override fun checkUpdate(activity: Activity, byUser: Boolean) {
+    override fun checkUpdate(
+        activity: Activity,
+        byUser: Boolean,
+    ) {
     }
 
     override fun createQRCodeAnalyzer(
         onSuccess: (String) -> Unit,
-        onFailure: (Exception) -> Unit
+        onFailure: (Exception) -> Unit,
     ): ImageAnalysis.Analyzer? {
         return null
     }
-}
+
+    override fun isPerAppProxyAvailable(): Boolean {
+        // Per-app Proxy is available for non-Play Store builds
+        return true
+    }
+}