Implement husband-wife connection dialogue and theme support for learn articles

lib/screens/settings/relationship_settings_screen.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../models/user_profile.dart';
 import '../../providers/user_provider.dart';
+import '../../models/teaching_plan.dart';
 
 class RelationshipSettingsScreen extends ConsumerWidget {
   const RelationshipSettingsScreen({super.key});
@@ -23,6 +24,34 @@ class RelationshipSettingsScreen extends ConsumerWidget {
                   'Select your current relationship status to customize your experience.',
                   style: TextStyle(fontSize: 16),
                 ),
+                const SizedBox(height: 16),
+                // Sample Data Button
+                Center(
+                  child: TextButton.icon(
+                    onPressed: () {
+                       final user = ref.read(userProfileProvider);
+                       if (user != null) {
+                           final samplePlan = TeachingPlan.create(
+                               topic: 'Walking in Love',
+                               scriptureReference: 'Ephesians 5:1-2',
+                               notes: 'As Christ loved us and gave himself up for us, a fragrant offering and sacrifice to God. Let our marriage reflect this sacrificial love.',
+                               date: DateTime.now(),
+                           );
+                           
+                           final List<TeachingPlan> updatedPlans = [...(user.teachingPlans ?? []), samplePlan];
+                           ref.read(userProfileProvider.notifier).updateProfile(
+                               user.copyWith(teachingPlans: updatedPlans)
+                           );
+                           
+                           ScaffoldMessenger.of(context).showSnackBar(
+                               const SnackBar(content: Text('Sample Teaching Plan Loaded! Check Devotional page.')),
+                           );
+                       }
+                    },
+                    icon: const Icon(Icons.science_outlined),
+                    label: const Text('Load Sample Teaching Plan (Demo)'),
+                  ),
+                ),
                 const SizedBox(height: 24),
                 _buildOption(
                   context,