Add Ladill Mini native Android and iOS apps.

Ship full-featured mobile clients with auth, payments, QRs, push notifications, and iOS polish including Figtree typography, app icons, and QR previews.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/android/app/proguard-rules.pro

@@ -0,0 +1,18 @@
+# Retrofit / Gson models are accessed reflectively.
+-keepattributes Signature
+-keepattributes *Annotation*
+-keep class com.ladill.mini.data.model.** { *; }
+
+# Retrofit
+-keepclasseswithmembers class * {
+    @retrofit2.http.* <methods>;
+}
+-dontwarn okhttp3.**
+-dontwarn okio.**
+-dontwarn retrofit2.**
+
+# Firebase Cloud Messaging
+-keep class com.google.firebase.** { *; }
+-keep class com.google.android.gms.** { *; }
+-dontwarn com.google.firebase.**
+-dontwarn com.google.android.gms.**