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

lib/screens/onboarding/onboarding_screen.dart

@@ -31,6 +31,9 @@ class _OnboardingScreenState extends ConsumerState<OnboardingScreen> {
   int _averageCycleLength = 28;
   DateTime? _lastPeriodStart;
   bool _isIrregularCycle = false;
+  int _minCycleLength = 25;
+  int _maxCycleLength = 35;
+  bool _isPadTrackingEnabled = false;
 
   @override
   void dispose() {
@@ -121,8 +124,11 @@ class _OnboardingScreenState extends ConsumerState<OnboardingScreen> {
           ? _fertilityGoal
           : null,
       averageCycleLength: _averageCycleLength,
+      minCycleLength: _minCycleLength,
+      maxCycleLength: _maxCycleLength,
       lastPeriodStartDate: _lastPeriodStart,
       isIrregularCycle: _isIrregularCycle,
+      isPadTrackingEnabled: _isPadTrackingEnabled,
       hasCompletedOnboarding: true,
       createdAt: DateTime.now(),
       updatedAt: DateTime.now(),
@@ -704,6 +710,53 @@ class _OnboardingScreenState extends ConsumerState<OnboardingScreen> {
             controlAffinity: ListTileControlAffinity.leading,
           ),
 
+          if (_isIrregularCycle) ...[
+            const SizedBox(height: 8),
+            Text('Cycle range (shortest to longest)',
+                style: theme.textTheme.titleSmall?.copyWith(
+                    fontWeight: FontWeight.w500,
+                    color: theme.colorScheme.onSurface)),
+            Row(
+              children: [
+                Expanded(
+                  child: RangeSlider(
+                    values: RangeValues(_minCycleLength.toDouble(), _maxCycleLength.toDouble()),
+                    min: 21,
+                    max: 45,
+                    divisions: 24,
+                    activeColor: AppColors.sageGreen,
+                    labels: RangeLabels('$_minCycleLength days', '$_maxCycleLength days'),
+                    onChanged: (values) {
+                      setState(() {
+                        _minCycleLength = values.start.round();
+                        _maxCycleLength = values.end.round();
+                      });
+                    },
+                  ),
+                ),
+              ],
+            ),
+            Center(
+              child: Text('$_minCycleLength - $_maxCycleLength days',
+                  style: theme.textTheme.bodyMedium?.copyWith(
+                      fontWeight: FontWeight.w600,
+                      color: AppColors.sageGreen)),
+            ),
+          ],
+
+          // Enable Supply Tracking Checkbox
+          CheckboxListTile(
+            title: Text('Enable supply tracking',
+                style: theme.textTheme.bodyLarge
+                    ?.copyWith(color: theme.colorScheme.onSurface)),
+            value: _isPadTrackingEnabled,
+            onChanged: (val) =>
+                setState(() => _isPadTrackingEnabled = val ?? false),
+            activeColor: AppColors.sageGreen,
+            contentPadding: EdgeInsets.zero,
+            controlAffinity: ListTileControlAffinity.leading,
+          ),
+
           const SizedBox(height: 24),
           Text('Last period start date',
               style: theme.textTheme.titleMedium?.copyWith(