feat: add carpet

lib/core/theme/app_theme.dart

@@ -53,11 +53,17 @@ class AppTheme {
     final base = ThemeData.dark(useMaterial3: true);
     return base.copyWith(
       scaffoldBackgroundColor: AppColors.bg,
-      primaryColor: AppColors.accent,
+      primaryColor: AppColors.lapis,
+      canvasColor: AppColors.bg,
+      cardColor: AppColors.panel,
+      dividerColor: AppColors.goldFaint,
       colorScheme: base.colorScheme.copyWith(
         primary: AppColors.gold,
-        secondary: AppColors.accent,
+        onPrimary: AppColors.lapisInk,
+        secondary: AppColors.lapis,
+        tertiary: AppColors.accent,
         surface: AppColors.panel,
+        onSurface: AppColors.text,
       ),
       textTheme: base.textTheme.apply(
         fontFamily: fontFamily,
@@ -69,6 +75,36 @@ class AppTheme {
         foregroundColor: AppColors.gold,
         centerTitle: true,
       ),
+      // دیالوگ/منو/اسنک‌بار با همان قابِ لاجورد + طلا.
+      dialogTheme: DialogThemeData(
+        backgroundColor: AppColors.panel,
+        surfaceTintColor: Colors.transparent,
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(18),
+          side: const BorderSide(color: AppColors.gold, width: 1.5),
+        ),
+        titleTextStyle: const TextStyle(
+            fontFamily: fontFamily,
+            color: AppColors.gold,
+            fontSize: 19,
+            fontWeight: FontWeight.bold),
+        contentTextStyle:
+            const TextStyle(fontFamily: fontFamily, color: AppColors.text),
+      ),
+      snackBarTheme: const SnackBarThemeData(
+        backgroundColor: AppColors.lapisMid,
+        contentTextStyle: TextStyle(fontFamily: fontFamily, color: AppColors.text),
+        behavior: SnackBarBehavior.floating,
+      ),
+      tabBarTheme: const TabBarThemeData(
+        labelColor: AppColors.gold,
+        unselectedLabelColor: Colors.white60,
+        indicatorColor: AppColors.gold,
+      ),
+      bottomSheetTheme: const BottomSheetThemeData(
+        backgroundColor: AppColors.panel,
+        surfaceTintColor: Colors.transparent,
+      ),
       inputDecorationTheme: InputDecorationTheme(
         filled: true,
         fillColor: AppColors.bgDark.withValues(alpha: 0.6),