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

lib/screens/settings/notification_settings_screen.dart

@@ -56,6 +56,60 @@ class NotificationSettingsScreen extends ConsumerWidget {
                   .updateProfile(userProfile.copyWith(notifyLowSupply: value));
             },
           ),
+          if (userProfile.isPadTrackingEnabled) ...[
+            const Divider(),
+             Padding(
+              padding: const EdgeInsets.symmetric(vertical: 8.0, horizontal: 16.0),
+              child: Text(
+                'Pad Change Reminders',
+                style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                  color: Theme.of(context).colorScheme.primary,
+                  fontWeight: FontWeight.bold,
+                ),
+              ),
+            ),
+            CheckboxListTile(
+              title: const Text('2 Hours Before'),
+              value: userProfile.notifyPad2Hours,
+              onChanged: (value) async {
+                if (value != null) {
+                  await ref.read(userProfileProvider.notifier).updateProfile(
+                      userProfile.copyWith(notifyPad2Hours: value));
+                }
+              },
+            ),
+            CheckboxListTile(
+              title: const Text('1 Hour Before'),
+              value: userProfile.notifyPad1Hour,
+              onChanged: (value) async {
+                if (value != null) {
+                  await ref.read(userProfileProvider.notifier).updateProfile(
+                      userProfile.copyWith(notifyPad1Hour: value));
+                }
+              },
+            ),
+            CheckboxListTile(
+              title: const Text('30 Minutes Before'),
+              value: userProfile.notifyPad30Mins,
+              onChanged: (value) async {
+                if (value != null) {
+                  await ref.read(userProfileProvider.notifier).updateProfile(
+                      userProfile.copyWith(notifyPad30Mins: value));
+                }
+              },
+            ),
+            CheckboxListTile(
+              title: const Text('Change Now (Time\'s Up)'),
+              subtitle: const Text('Get notified when it\'s recommended to change.'),
+              value: userProfile.notifyPadNow,
+              onChanged: (value) async {
+                if (value != null) {
+                  await ref.read(userProfileProvider.notifier).updateProfile(
+                      userProfile.copyWith(notifyPadNow: value));
+                }
+              },
+            ),
+          ],
         ],
       ),
     );