feat: add ZetaCalendar component and usage example

example/lib/config/components_config.dart

@@ -8,6 +8,7 @@ import 'package:zeta_example/pages/components/banner_example.dart' deferred as b
 import 'package:zeta_example/pages/components/bottom_sheet_example.dart' deferred as bottom_sheet_example;
 import 'package:zeta_example/pages/components/breadcrumb_example.dart' deferred as breadcrumb_example;
 import 'package:zeta_example/pages/components/button_example.dart' deferred as button_example;
+import 'package:zeta_example/pages/components/calendar_example.dart' deferred as calendar_example;
 import 'package:zeta_example/pages/components/card_example.dart' deferred as card_example;
 import 'package:zeta_example/pages/components/chat_item_example.dart' deferred as chat_item_example;
 import 'package:zeta_example/pages/components/checkbox_example.dart' deferred as checkbox_example;
@@ -61,6 +62,7 @@ const String bannerSystemRoute = 'SystemBanner';
 const String bannerInPageRoute = 'InPageBanner';
 const String bottomSheetRoute = 'BottomSheet';
 const String breadcrumbRoute = 'Breadcrumb';
+const String calendarRoute = 'Calendar';
 const String buttonRoute = 'Buttons/Button';
 const String iconButtonRoute = 'Buttons/IconButton';
 const String buttonGroupRoute = 'ButtonGroup';
@@ -171,6 +173,10 @@ final Map<String, ExampleWrap> componentExampleNames = {
     pageBuilder: (context) => breadcrumb_example.BreadcrumbExample(),
     loader: breadcrumb_example.loadLibrary,
   ),
+  calendarRoute: ExampleWrap(
+    pageBuilder: (context) => calendar_example.CalendarExample(),
+    loader: calendar_example.loadLibrary,
+  ),
   buttonRoute: ExampleWrap(
     pageBuilder: (context) => button_example.ButtonExample(),
     loader: button_example.loadLibrary,

example/lib/pages/components/calendar_example.dart

@@ -0,0 +1,85 @@
+import 'package:flutter/material.dart';
+import 'package:zeta_example/config/components_config.dart';
+import 'package:zeta_example/widgets.dart';
+import 'package:zeta_flutter/zeta_flutter.dart';
+
+class CalendarExample extends StatefulWidget {
+  const CalendarExample({Key? key}) : super(key: key);
+
+  @override
+  State<CalendarExample> createState() => _CalendarExampleState();
+}
+
+class _CalendarExampleState extends State<CalendarExample> {
+  DateTimeRange? _selectedRange;
+
+  @override
+  Widget build(BuildContext context) {
+    return ExampleScaffold(
+      name: calendarRoute,
+      child: SingleChildScrollView(
+        padding: const EdgeInsets.all(16),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            if (_selectedRange != null)
+              Padding(
+                padding: const EdgeInsets.only(bottom: 16),
+                child: Text(
+                  'Selected: ${_formatDate(_selectedRange!.start)} – ${_formatDate(_selectedRange!.end)}',
+                  style: Zeta.of(context).textStyles.bodyMedium,
+                ),
+              ),
+            ZetaCalendar(
+              key: const Key('docs-calendar'),
+              initialStartDate: DateTime(2028, 7, 3),
+              initialEndDate: DateTime(2028, 8, 18),
+              minDate: DateTime(2020),
+              maxDate: DateTime(2035),
+              onRangeChanged: (range) {
+                setState(() => _selectedRange = range);
+              },
+              onApply: (range) {
+                if (range != null) {
+                  ScaffoldMessenger.of(context).showSnackBar(
+                    SnackBar(
+                      content: Text(
+                        'Applied: ${_formatDate(range.start)} – ${_formatDate(range.end)}',
+                      ),
+                    ),
+                  );
+                }
+              },
+              onCancel: () {
+                ScaffoldMessenger.of(context).showSnackBar(
+                  const SnackBar(content: Text('Cancelled')),
+                );
+              },
+              onReset: () {
+                setState(() => _selectedRange = null);
+              },
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  String _formatDate(DateTime date) {
+    const months = [
+      'Jan',
+      'Feb',
+      'Mar',
+      'Apr',
+      'May',
+      'Jun',
+      'Jul',
+      'Aug',
+      'Sep',
+      'Oct',
+      'Nov',
+      'Dec',
+    ];
+    return '${months[date.month - 1]} ${date.day}, ${date.year}';
+  }
+}

example/linux/flutter/generated_plugins.cmake

@@ -8,6 +8,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST
+  jni
 )
 
 set(PLUGIN_BUNDLED_LIBRARIES)

example/windows/flutter/generated_plugins.cmake

@@ -8,6 +8,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST
+  jni
 )
 
 set(PLUGIN_BUNDLED_LIBRARIES)