feat:增加待办提醒功能

lib/widgets/common.dart

@@ -79,6 +79,9 @@ Widget buildOmniDateButton({
     onPressed: () async {
       final DateTime? picked = await showOmniDateTimePicker(
         context: context,
+        constraints: const BoxConstraints(
+          maxWidth: 400,
+        ),
         initialDate: selectedDate ?? DateTime.now(),
         firstDate: DateTime(
           DateTime.now().year,

lib/widgets/task_dialog.dart

@@ -19,6 +19,7 @@ class _TaskDialogState extends State<TaskDialog> {
   late Priority _selectedPriority;
   DateTime? _selectedDueDate;
   DateTime? _selectedScheduleTime;
+  DateTime? _createTime;
   final _formKey = GlobalKey<FormState>();
 
   @override
@@ -29,6 +30,7 @@ class _TaskDialogState extends State<TaskDialog> {
     _selectedPriority = widget.task?.priority ?? Priority.medium;
     _selectedDueDate = widget.task?.dueDate;
     _selectedScheduleTime = widget.task?.scheduleTime;
+    _createTime = widget.task?.createTime;
   }
 
   @override
@@ -38,8 +40,22 @@ class _TaskDialogState extends State<TaskDialog> {
     super.dispose();
   }
 
-  void onConfirmClick() {
+  void onConfirmClick() async {
     if (_formKey.currentState!.validate()) {
+      if (_selectedScheduleTime != null &&
+          _selectedScheduleTime!.isBefore(DateTime.now())) {
+        await displayInfoBar(
+          context,
+          builder: (context, close) {
+            return InfoBar(
+              title: const Text('提醒时间不能早于当前时间'),
+              severity: InfoBarSeverity.error,
+            );
+          },
+        );
+        return;
+      }
+
       final task = Task(
         id: widget.task?.id,
         title: _titleController.text,
@@ -48,6 +64,7 @@ class _TaskDialogState extends State<TaskDialog> {
         scheduleTime: _selectedScheduleTime,
         priority: _selectedPriority,
         isCompleted: widget.task?.isCompleted ?? false,
+        createTime: _createTime,
       );
       widget.onSave(task);
       Navigator.pop(context);

lib/widgets/task_item.dart

@@ -1,4 +1,5 @@
 import 'package:fluent_ui/fluent_ui.dart';
+import 'package:intl/intl.dart';
 import 'package:task_hub/models/task.dart';
 
 class TaskItem extends StatelessWidget {
@@ -39,11 +40,14 @@ class TaskItem extends StatelessWidget {
                       Expanded(child: _buildTitle(context)),
                     ],
                   ),
-                  const SizedBox(height: 4),
-                  if (task.desc != null && task.desc!.isNotEmpty) _buildDesc(),
-                  const SizedBox(height: 4),
-                  if (task.dueDate != null || task.scheduleTime != null)
+                  if (task.desc != null && task.desc!.isNotEmpty) ...[
+                    const SizedBox(height: 4),
+                    _buildDesc(),
+                  ],
+                  if (task.dueDate != null || task.scheduleTime != null) ...[
+                    const SizedBox(height: 4),
                     _buildDate(),
+                  ]
                 ],
               ),
             ),
@@ -92,7 +96,7 @@ class TaskItem extends StatelessWidget {
           Icon(FluentIcons.calendar, size: 12, color: Colors.grey),
           const SizedBox(width: 4),
           Text(
-            '截止日期: ${_formatDate(task.dueDate!)}',
+            '截止日期: ${DateFormat('yyyy-MM-dd').format(task.dueDate!)}',
             style: TextStyle(color: Colors.grey, fontSize: 12),
           ),
           const SizedBox(width: 4),
@@ -101,7 +105,7 @@ class TaskItem extends StatelessWidget {
           Icon(FluentIcons.clock, size: 12, color: Colors.grey),
           const SizedBox(width: 4),
           Text(
-            '提醒日期: ${_formatDate(task.scheduleTime!)}',
+            '提醒日期: ${DateFormat('yyyy-MM-dd HH:mm:ss').format(task.scheduleTime!)}',
             style: TextStyle(color: Colors.grey, fontSize: 12),
           ),
         ],
@@ -181,8 +185,4 @@ class TaskItem extends StatelessWidget {
       ),
     );
   }
-
-  String _formatDate(DateTime date) {
-    return '${date.year}-${date.month.toString().padLeft(2, '0')}-${date.day.toString().padLeft(2, '0')}';
-  }
 }