Refine schedule/todo UI and integrate Google Photos API

flutter_app/lib/widgets/todo_list_widget.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
 import 'package:provider/provider.dart';
 import '../models/todo_item.dart';
 import '../models/family_member.dart';
@@ -85,7 +86,7 @@ class _TodoListWidgetState extends State<TodoListWidget> {
             mainAxisAlignment: MainAxisAlignment.spaceBetween,
             children: [
               Text(
-                "Today's Todos",
+                "오늘의 할 일",
                 style: Theme.of(context).textTheme.titleLarge?.copyWith(
                       color: Colors.white,
                       fontWeight: FontWeight.bold,
@@ -128,7 +129,7 @@ class _TodoListWidgetState extends State<TodoListWidget> {
             Icon(Icons.thumb_up, color: Colors.white24, size: 32),
             SizedBox(height: 8),
             Text(
-              'All done for today!',
+              '오늘 할 일을 모두 마쳤습니다!',
               style: TextStyle(color: Colors.white54),
             ),
           ],
@@ -218,6 +219,12 @@ class _TodoListWidgetState extends State<TodoListWidget> {
               decorationColor: Colors.white54,
             ),
           ),
+          subtitle: todo.dueDate != null && (todo.dueDate!.hour != 0 || todo.dueDate!.minute != 0)
+              ? Text(
+                  DateFormat('HH:mm').format(todo.dueDate!),
+                  style: const TextStyle(color: Colors.white54, fontSize: 12),
+                )
+              : null,
           trailing: Checkbox(
             value: todo.completed,
             onChanged: (val) async {