fix(android): apply robust static RGB colors and compatible background opacity fallback

pedi-foods/Sources/PediFoods/Views/Auth/LoginView.swift

@@ -43,6 +43,13 @@ struct LoginView: View {
                 (colorScheme == .dark ? Color.black : AppColors.backgroundLight)
                     .ignoresSafeArea()
 
+#if os(Android)
+                pinHeroImage
+                    .scaledToFill()
+                    .frame(height: heroHeight + 80)
+                    .offset(y: heroVisible ? -60 : -(heroHeight + 220))
+                    .opacity(colorScheme == .dark ? 0.08 : 0.15)
+#else
                 pinHeroImage
                     .scaledToFill()
                     .frame(height: heroHeight + 80)
@@ -54,6 +61,7 @@ struct LoginView: View {
                             endPoint: .bottom
                         )
                     )
+#endif
 
                 VStack(spacing: 18) {
                     Spacer().frame(height: logoTopInset)