Resolve all lints and deprecation warnings

lib/screens/settings/sharing_settings_screen.dart

@@ -2,7 +2,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:google_fonts/google_fonts.dart';
 import '../../theme/app_theme.dart';
-import '../../models/user_profile.dart';
 import '../../providers/user_provider.dart';
 
 class SharingSettingsScreen extends ConsumerWidget {
@@ -31,7 +30,9 @@ class SharingSettingsScreen extends ConsumerWidget {
           ListTile(
             leading: const Icon(Icons.link),
             title: const Text('Link with Husband'),
-            subtitle: Text(userProfile.partnerName != null ? 'Linked to ${userProfile.partnerName}' : 'Not linked'),
+            subtitle: Text(userProfile.partnerName != null
+                ? 'Linked to ${userProfile.partnerName}'
+                : 'Not linked'),
             trailing: const Icon(Icons.chevron_right),
             onTap: () => _showShareDialog(context, ref),
           ),
@@ -67,9 +68,8 @@ class SharingSettingsScreen extends ConsumerWidget {
             title: const Text('Share Energy Levels'),
             value: userProfile.shareEnergyLevels,
             onChanged: (value) {
-              ref
-                  .read(userProfileProvider.notifier)
-                  .updateProfile(userProfile.copyWith(shareEnergyLevels: value));
+              ref.read(userProfileProvider.notifier).updateProfile(
+                  userProfile.copyWith(shareEnergyLevels: value));
             },
           ),
           SwitchListTile(
@@ -98,16 +98,17 @@ class SharingSettingsScreen extends ConsumerWidget {
   void _showShareDialog(BuildContext context, WidgetRef ref) {
     // Generate a simple pairing code
     final userProfile = ref.read(userProfileProvider);
-    final pairingCode = userProfile?.id?.substring(0, 6).toUpperCase() ?? 'ABC123';
+    final pairingCode =
+        userProfile?.id.substring(0, 6).toUpperCase() ?? 'ABC123';
 
     showDialog(
       context: context,
       builder: (context) => AlertDialog(
-        title: Row(
+        title: const Row(
           children: [
             Icon(Icons.share_outlined, color: AppColors.navyBlue),
-            const SizedBox(width: 8),
-            const Text('Share with Husband'),
+            SizedBox(width: 8),
+            Text('Share with Husband'),
           ],
         ),
         content: Column(
@@ -115,15 +116,17 @@ class SharingSettingsScreen extends ConsumerWidget {
           children: [
             Text(
               'Share this code with your husband so he can connect to your cycle data:',
-              style: GoogleFonts.outfit(fontSize: 14, color: AppColors.warmGray),
+              style:
+                  GoogleFonts.outfit(fontSize: 14, color: AppColors.warmGray),
             ),
             const SizedBox(height: 24),
             Container(
               padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 16),
               decoration: BoxDecoration(
-                color: AppColors.navyBlue.withOpacity(0.1),
+                color: AppColors.navyBlue.withValues(alpha: 0.1),
                 borderRadius: BorderRadius.circular(12),
-                border: Border.all(color: AppColors.navyBlue.withOpacity(0.3)),
+                border: Border.all(
+                    color: AppColors.navyBlue.withValues(alpha: 0.3)),
               ),
               child: SelectableText(
                 pairingCode,
@@ -138,7 +141,8 @@ class SharingSettingsScreen extends ConsumerWidget {
             const SizedBox(height: 16),
             Text(
               'He can enter this in his app under Settings > Connect with Wife.',
-              style: GoogleFonts.outfit(fontSize: 12, color: AppColors.warmGray),
+              style:
+                  GoogleFonts.outfit(fontSize: 12, color: AppColors.warmGray),
               textAlign: TextAlign.center,
             ),
           ],