Refactor: Implement multi-item inventory for Pad Tracker and dynamic navigation

lib/screens/husband/_HusbandLearnScreen.dart

@@ -1,3 +1,8 @@
+import 'package:flutter/material.dart';
+import 'package:google_fonts/google_fonts.dart';
+import '../../theme/app_theme.dart';
+import './learn_article_screen.dart';
+
 class _HusbandLearnScreen extends StatelessWidget {
   const _HusbandLearnScreen();
 
@@ -149,6 +154,7 @@ class _HusbandLearnScreen extends StatelessWidget {
       ],
     );
   }
+}
 
 class _LearnItem {
   final IconData icon;