feat : persian calendar and date picker

packages/core/lib/presentation/widget/app_bar/r_app_bar.dart

@@ -16,8 +16,8 @@ class RAppBar extends StatelessWidget implements PreferredSizeWidget {
   const RAppBar({
     super.key,
     required this.title,
-    this.backgroundColor = AppColor.lightGreyLight,
-    this.iconColor = AppColor.blueNormal,
+    this.backgroundColor = AppColor.blueNormal,
+    this.iconColor = Colors.white,
     this.titleTextStyle,
     this.onBackPressed,
     this.additionalActions,
@@ -34,13 +34,13 @@ class RAppBar extends StatelessWidget implements PreferredSizeWidget {
       scrolledUnderElevation: 0,
       titleTextStyle:
           titleTextStyle ??
-          AppFonts.yekan16.copyWith(color: AppColor.blueNormal),
+          AppFonts.yekan16.copyWith(color:Colors.white),
       title: Text(title),
 
-      leading:Padding(
+      leading:leading!=null ? Padding(
         padding: const EdgeInsets.only(right: 16),
         child: leading,
-      ),
+      ) : null,
       actions: [
         if (additionalActions != null) ...additionalActions!,
         Padding(