feat:重构代办事项模块

lib/utils/todo_utils.dart

@@ -0,0 +1,23 @@
+import 'package:flisp_app/models/todo.dart';
+
+List<TodoItem> getActiveTodos(TodoTab currentTab, List<TodoItem> todos) {
+  switch (currentTab) {
+    case TodoTab.active:
+      return todos.where((todo) => !todo.isCompleted).toList();
+    case TodoTab.completed:
+      return todos.where((todo) => todo.isCompleted).toList();
+    case TodoTab.today:
+      final today = DateTime.now();
+      return todos
+          .where(
+            (todo) =>
+        todo.dueDate != null &&
+            todo.dueDate!.year == today.year &&
+            todo.dueDate!.month == today.month &&
+            todo.dueDate!.day == today.day,
+      )
+          .toList();
+    default:
+      return todos;
+  }
+}