Resolve all lints and deprecation warnings

lib/screens/calendar/calendar_screen.dart

@@ -6,7 +6,6 @@ import 'package:table_calendar/table_calendar.dart';
 import '../../models/user_profile.dart';
 import '../../models/cycle_entry.dart';
 import '../../providers/user_provider.dart';
-import '../../services/cycle_service.dart';
 import '../../theme/app_theme.dart';
 import '../log/log_screen.dart';
 import 'package:uuid/uuid.dart';
@@ -96,7 +95,7 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
                     borderRadius: BorderRadius.circular(20),
                     boxShadow: [
                       BoxShadow(
-                        color: Colors.black.withOpacity(0.05),
+                        color: Colors.black.withValues(alpha: 0.05),
                         blurRadius: 15,
                         offset: const Offset(0, 5),
                       ),
@@ -134,7 +133,7 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
                             AppColors.charcoal,
                       ),
                       todayDecoration: BoxDecoration(
-                        color: AppColors.sageGreen.withOpacity(0.3),
+                        color: AppColors.sageGreen.withValues(alpha: 0.3),
                         shape: BoxShape.circle,
                       ),
                       todayTextStyle: GoogleFonts.outfit(
@@ -303,7 +302,7 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
     return Container(
       padding: const EdgeInsets.all(4),
       decoration: BoxDecoration(
-        color: AppColors.lightGray.withOpacity(0.5),
+        color: AppColors.lightGray.withValues(alpha: 0.5),
         borderRadius: BorderRadius.circular(12),
       ),
       child: Row(
@@ -332,7 +331,7 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
             boxShadow: isSelected
                 ? [
                     BoxShadow(
-                      color: Colors.black.withOpacity(0.1),
+                      color: Colors.black.withValues(alpha: 0.1),
                       blurRadius: 4,
                       offset: const Offset(0, 2),
                     )
@@ -359,12 +358,12 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
       child: Container(
         padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
         decoration: BoxDecoration(
-          color: AppColors.blushPink.withOpacity(0.5),
+          color: AppColors.blushPink.withValues(alpha: 0.5),
           borderRadius: BorderRadius.circular(20),
         ),
         child: Row(
           children: [
-            Icon(Icons.info_outline, size: 16, color: AppColors.rose),
+            const Icon(Icons.info_outline, size: 16, color: AppColors.rose),
             const SizedBox(width: 4),
             Text(
               'Legend',
@@ -451,7 +450,7 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
         borderRadius: BorderRadius.circular(16),
         boxShadow: [
           BoxShadow(
-            color: Colors.black.withOpacity(0.05),
+            color: Colors.black.withValues(alpha: 0.05),
             blurRadius: 10,
             offset: const Offset(0, 4),
           ),
@@ -482,7 +481,7 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
                 padding:
                     const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
                 decoration: BoxDecoration(
-                  color: _getPhaseColor(phase).withOpacity(0.15),
+                  color: _getPhaseColor(phase).withValues(alpha: 0.15),
                   borderRadius: BorderRadius.circular(20),
                 ),
                 child: Row(
@@ -625,9 +624,10 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
       margin: const EdgeInsets.only(top: 8),
       padding: const EdgeInsets.all(12),
       decoration: BoxDecoration(
-        color: AppColors.menstrualPhase.withOpacity(0.05),
+        color: AppColors.menstrualPhase.withValues(alpha: 0.05),
         borderRadius: BorderRadius.circular(12),
-        border: Border.all(color: AppColors.menstrualPhase.withOpacity(0.2)),
+        border:
+            Border.all(color: AppColors.menstrualPhase.withValues(alpha: 0.2)),
       ),
       child: Row(
         children: [
@@ -703,9 +703,9 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
       margin: const EdgeInsets.only(top: 16),
       padding: const EdgeInsets.all(16),
       decoration: BoxDecoration(
-        color: AppColors.softGold.withOpacity(isDark ? 0.15 : 0.1),
+        color: AppColors.softGold.withValues(alpha: isDark ? 0.15 : 0.1),
         borderRadius: BorderRadius.circular(12),
-        border: Border.all(color: AppColors.softGold.withOpacity(0.3)),
+        border: Border.all(color: AppColors.softGold.withValues(alpha: 0.3)),
       ),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
@@ -758,7 +758,7 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
           Container(
             padding: const EdgeInsets.all(8),
             decoration: BoxDecoration(
-              color: color.withOpacity(0.1),
+              color: color.withValues(alpha: 0.1),
               borderRadius: BorderRadius.circular(8),
             ),
             child: Icon(icon, color: color, size: 18),
@@ -791,13 +791,24 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
 
   String _getSymptomsString(CycleEntry entry) {
     List<String> s = [];
-    if (entry.crampIntensity != null && entry.crampIntensity! > 0)
+    if (entry.crampIntensity != null && entry.crampIntensity! > 0) {
       s.add('Cramps (${entry.crampIntensity}/5)');
-    if (entry.hasHeadache) s.add('Headache');
-    if (entry.hasBloating) s.add('Bloating');
-    if (entry.hasBreastTenderness) s.add('Breast Tenderness');
-    if (entry.hasFatigue) s.add('Fatigue');
-    if (entry.hasAcne) s.add('Acne');
+    }
+    if (entry.hasHeadache) {
+      s.add('Headache');
+    }
+    if (entry.hasBloating) {
+      s.add('Bloating');
+    }
+    if (entry.hasBreastTenderness) {
+      s.add('Breast Tenderness');
+    }
+    if (entry.hasFatigue) {
+      s.add('Fatigue');
+    }
+    if (entry.hasAcne) {
+      s.add('Acne');
+    }
     return s.join(', ');
   }
 
@@ -856,14 +867,9 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
     return months[month - 1];
   }
 
-  bool _isLoggedPeriodDay(DateTime date, List<CycleEntry> entries) {
-    final entry = _getEntryForDate(date, entries);
-    return entry?.isPeriodDay ?? false;
-  }
-
   Widget _buildCalendarDay(DateTime day, DateTime focusedDay,
       List<CycleEntry> entries, DateTime? lastPeriodStart, int cycleLength,
-      {bool isSelected = false, bool isToday = false, bool isWeekend = false}) {
+      {bool isSelected = false, bool isToday = false}) {
     final phase = _getPhaseForDate(day, lastPeriodStart, cycleLength);
     final isDark = Theme.of(context).brightness == Brightness.dark;
 
@@ -888,12 +894,12 @@ class _CalendarScreenState extends ConsumerState<CalendarScreen> {
       );
     } else if (isToday) {
       decoration = BoxDecoration(
-        color: AppColors.sageGreen.withOpacity(0.2),
+        color: AppColors.sageGreen.withValues(alpha: 0.2),
         shape: BoxShape.circle,
       );
     } else if (phase != null) {
       decoration = BoxDecoration(
-        color: _getPhaseColor(phase).withOpacity(isDark ? 0.2 : 0.15),
+        color: _getPhaseColor(phase).withValues(alpha: isDark ? 0.2 : 0.15),
         shape: BoxShape.circle,
       );
     }