修正上架時 Google Play 檢查出的 issue

lib/expense/expense_api.dart

@@ -1,11 +1,10 @@
 import 'dart:io';
-import 'dart:convert'; // [修正 1] 必須導入此包才能使用 json.decode
+// [修正 1] 必須導入此包才能使用 json.decode
 import 'package:http/http.dart' as http;
 import 'package:intl/intl.dart';
 import '../services/generic_api_service.dart';
 import '../auth_manager.dart';
 import 'expense_model.dart';
-import 'package:path/path.dart' as p;
 
 class ExpenseApiService {
   final GenericApiService _apiService = GenericApiService();
@@ -44,7 +43,7 @@ class ExpenseApiService {
       );
 
       // 取得本地檔案名稱
-      String picFileName = "${GenericApiService.BASE_IP}/upload/eis_$db/images/" + file.path.split('/').last;
+      String picFileName = "${GenericApiService.BASE_IP}/upload/eis_$db/images/${file.path.split('/').last}";
 
       // [修正] index.js 的 multer 配置要求 key 必須是 'file'
       request.files.add(await http.MultipartFile.fromPath('file', file.path));

lib/expense/expense_detail.dart

@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 import './expense_model.dart';
-import '../services/generic_api_service.dart';
 
 class ExpenseDetail extends StatelessWidget {
   final ExpenseApply expense;

lib/expense/expense_form.dart

@@ -132,7 +132,7 @@ class _ExpenseFormState extends State<ExpenseForm> {
               // [新增] 類別下拉選單
               const SizedBox(height: 16),
               DropdownButtonFormField<String>(
-                value: _selectedExpId,
+                initialValue: _selectedExpId,
                 decoration: const InputDecoration(labelText: "費用類別", border: OutlineInputBorder()),
                 items: _classList.map((c) => DropdownMenuItem(
                   value: c.expId,

lib/expense/expense_model.dart

@@ -1,5 +1,3 @@
-import 'package:flutter/material.dart';
-import 'package:intl/intl.dart';
 // 在 expense_model.dart 中修改
 import '../auth_manager.dart';
 import '../services/generic_api_service.dart';