feat: tela de apps com logos/menu de exclusao, correcao de tema nas mini apps e sidebar de navegacao

lib/utils/miniapp_bridge.dart

@@ -71,11 +71,20 @@ class MiniappBridge {
   }
 
   /// Builds the theme palette map sent to mini apps. Colors are serialized as
-  /// `#AARRGGBB` hex strings so they can be used directly in CSS/JS.
-  static Map<String, Object?> buildPalette(ColorScheme scheme, Brightness brightness) {
+  /// `#RRGGBBAA` hex strings (CSS 8-digit order) so they can be used directly
+  /// in CSS/JS.
+  static Map<String, Object?> buildPalette(
+    ColorScheme scheme,
+    Brightness brightness,
+  ) {
     String hex(Color c) {
       final value = c.toARGB32();
-      return '#${value.toRadixString(16).padLeft(8, '0').toUpperCase()}';
+      final rgb = value & 0xFFFFFF;
+      final alpha = (value >> 24) & 0xFF;
+      return '#${rgb
+              .toRadixString(16)
+              .padLeft(6, '0')}${alpha.toRadixString(16).padLeft(2, '0')}'
+          .toUpperCase();
     }
 
     return {