refactor: 重构前端 UI 组件与后端 AgentScope schemas

apps/lib/features/calendar/ui/widgets/create_event_sheet.dart

@@ -145,12 +145,22 @@ class _CreateEventSheetState extends State<CreateEventSheet>
       child: Row(
         mainAxisAlignment: MainAxisAlignment.spaceBetween,
         children: [
-          GestureDetector(
-            onTap: () => Navigator.pop(context),
-            child: const Icon(
-              LucideIcons.x,
-              size: 24,
-              color: AppColors.slate700,
+          SizedBox(
+            width: AppSpacing.xxl * 2,
+            height: AppSpacing.xxl * 2,
+            child: TextButton(
+              onPressed: () => Navigator.pop(context),
+              style: TextButton.styleFrom(
+                padding: const EdgeInsets.all(AppSpacing.none),
+                shape: RoundedRectangleBorder(
+                  borderRadius: BorderRadius.circular(AppRadius.full),
+                ),
+              ),
+              child: const Icon(
+                LucideIcons.x,
+                size: AppSpacing.xxl,
+                color: AppColors.slate700,
+              ),
             ),
           ),
           Text(
@@ -164,16 +174,25 @@ class _CreateEventSheetState extends State<CreateEventSheet>
           ValueListenableBuilder<TextEditingValue>(
             valueListenable: _titleController,
             builder: (context, value, child) {
-              return GestureDetector(
-                onTap: _saveEvent,
-                child: Text(
-                  '保存',
-                  style: TextStyle(
-                    fontSize: 17,
-                    fontWeight: FontWeight.w600,
-                    color: value.text.trim().isNotEmpty
-                        ? AppColors.blue600
-                        : AppColors.slate400,
+              final enabled = value.text.trim().isNotEmpty;
+              return SizedBox(
+                height: AppSpacing.xxl * 2,
+                child: TextButton(
+                  onPressed: enabled ? _saveEvent : null,
+                  style: TextButton.styleFrom(
+                    padding: const EdgeInsets.symmetric(
+                      horizontal: AppSpacing.md,
+                    ),
+                    minimumSize: const Size(AppSpacing.none, AppSpacing.none),
+                    tapTargetSize: MaterialTapTargetSize.shrinkWrap,
+                  ),
+                  child: Text(
+                    '保存',
+                    style: TextStyle(
+                      fontSize: 17,
+                      fontWeight: FontWeight.w600,
+                      color: enabled ? AppColors.blue600 : AppColors.slate400,
+                    ),
                   ),
                 ),
               );