학생 계정 엑셀 일괄 등록 기능 추가 (신입생 등)

- 학생 계정 관리 화면에 드래그앤드롭/클릭 업로드 영역 추가
  (excel, desktop_drop, file_picker 패키지 도입)
- .xlsx 파싱 → 미리보기 팝업 → 확인 후 한 명씩 순서대로 계정 생성,
  결과(성공/실패)를 요약해서 보여줌. 초기 비밀번호는 1234 고정
- file_picker의 웹 구현체가 pickFile(s)를 아직 구현하지 않아서
  (UnimplementedError) 웹에서는 package:web으로 직접 <input type=file>을
  다뤄서 우회 (lib/function/excel_file_picker_web.dart), 다른 플랫폼은
  기존 file_picker 사용 (excel_file_picker_io.dart)

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

lib/function/excel_file_picker.dart

@@ -0,0 +1,4 @@
+// 📄 엑셀 파일 하나를 골라 바이트로 돌려주는 진입점. 실제 구현은 플랫폼별로 갈라진다
+// (web은 file_picker의 웹 구현체에 pickFile(s)가 아직 없어서 dart:html로 직접 처리).
+export 'excel_file_picker_io.dart'
+    if (dart.library.html) 'excel_file_picker_web.dart';

lib/function/excel_file_picker_io.dart

@@ -0,0 +1,13 @@
+// 📄 [비웹 플랫폼] file_picker로 엑셀 파일 하나를 고른다.
+import 'dart:typed_data';
+import 'package:file_picker/file_picker.dart';
+
+/// 사용자가 엑셀(.xlsx) 파일을 고르면 바이트를 돌려준다. 취소하면 null.
+Future<Uint8List?> pickExcelFileBytes() async {
+  final files = await FilePicker.pickFiles(
+    type: FileType.custom,
+    allowedExtensions: ['xlsx'],
+  );
+  if (files.isEmpty) return null;
+  return files.first.readAsBytes();
+}

lib/function/excel_file_picker_web.dart

@@ -0,0 +1,31 @@
+// 📄 [웹 전용] file_picker의 웹 구현체에 pickFile(s)가 아직 없어서(UnimplementedError),
+// 숨겨진 <input type="file">를 직접 만들어 처리한다.
+import 'dart:async';
+import 'dart:js_interop';
+import 'dart:typed_data';
+import 'package:web/web.dart' as web;
+
+/// 사용자가 엑셀(.xlsx) 파일을 고르면 바이트를 돌려준다. 취소하면 null.
+Future<Uint8List?> pickExcelFileBytes() async {
+  final completer = Completer<web.File?>();
+  final input = web.HTMLInputElement()
+    ..type = 'file'
+    ..accept = '.xlsx'
+    ..style.display = 'none';
+  // 문서에 실제로 붙어있지 않으면 일부 브라우저/자동화 환경에서 change 이벤트가
+  // 안정적으로 안 잡힌다 — 그래서 body에 잠깐 붙였다가 끝나면 반드시 제거한다.
+  web.document.body!.append(input);
+
+  input.onchange = (web.Event event) {
+    final file = input.files?.item(0);
+    input.remove();
+    completer.complete(file);
+  }.toJS;
+
+  input.click();
+  final file = await completer.future;
+  if (file == null) return null;
+
+  final buffer = await file.arrayBuffer().toDart;
+  return buffer.toDart.asUint8List();
+}

lib/function/teacher_student_management_controller.dart

@@ -1,13 +1,115 @@
-// 👥 교사용 학생 계정 관리 화면의 기능(서버 통신/상태) 담당 컨트롤러.
+// 👥 교사용 학생 계정 관리 화면의 기능(서버 통신/상태/엑셀 일괄등록) 담당 컨트롤러.
 import 'dart:convert';
+import 'package:excel/excel.dart';
 import 'package:flutter/foundation.dart';
 import 'package:http/http.dart' as http;
 import '../config.dart';
 
+/// 📄 엑셀 한 줄에서 뽑아낸 학생 정보 (아직 서버에 보내기 전, 미리보기용).
+class BulkStudentRow {
+  final String studentId;
+  final String name;
+  final int? grade;
+
+  const BulkStudentRow({
+    required this.studentId,
+    required this.name,
+    this.grade,
+  });
+}
+
+/// 📊 일괄 등록 결과. [failures]는 "학번 이름: 실패사유" 형태의 문자열 목록.
+class BulkImportResult {
+  final int successCount;
+  final List<String> failures;
+
+  const BulkImportResult({required this.successCount, required this.failures});
+}
+
 class TeacherStudentManagementController extends ChangeNotifier {
   bool _isWorking = false;
   bool get isWorking => _isWorking;
 
+  int _bulkTotal = 0;
+  int _bulkDone = 0;
+  int get bulkTotal => _bulkTotal;
+  int get bulkDone => _bulkDone;
+
+  /// 📄 엑셀 파일 바이트를 파싱한다. 1행은 머리글로 보고 건너뛰며,
+  /// A열=학번, B열=이름, C열=학년(선택, 숫자) 순서를 기대한다.
+  /// 학번이나 이름이 비어있는 줄은 조용히 무시한다.
+  List<BulkStudentRow> parseExcelBytes(Uint8List bytes) {
+    final excel = Excel.decodeBytes(bytes);
+    if (excel.tables.isEmpty) return [];
+
+    final sheet = excel.tables.values.first;
+    final rows = <BulkStudentRow>[];
+
+    for (final row in sheet.rows.skip(1)) {
+      final studentId = _cellText(row.isNotEmpty ? row[0]?.value : null);
+      final name = _cellText(row.length > 1 ? row[1]?.value : null);
+      if (studentId == null || name == null) continue;
+
+      final grade = _cellToGrade(row.length > 2 ? row[2]?.value : null);
+      rows.add(BulkStudentRow(studentId: studentId, name: name, grade: grade));
+    }
+    return rows;
+  }
+
+  String? _cellText(CellValue? value) {
+    if (value == null) return null;
+    String text;
+    if (value is IntCellValue) {
+      text = value.value.toString();
+    } else if (value is DoubleCellValue) {
+      text = value.value == value.value.roundToDouble()
+          ? value.value.toInt().toString()
+          : value.value.toString();
+    } else {
+      text = value.toString().trim();
+    }
+    return text.isEmpty ? null : text;
+  }
+
+  int? _cellToGrade(CellValue? value) {
+    if (value == null) return null;
+    if (value is IntCellValue) return value.value;
+    if (value is DoubleCellValue) return value.value.round();
+    return int.tryParse(value.toString().trim());
+  }
+
+  /// ➕ 엑셀에서 뽑아낸 학생 목록을 한 명씩 순서대로 서버에 등록한다 (기본 비밀번호 1234).
+  /// 한 명 실패해도 나머지는 계속 진행하고, 마지막에 성공/실패를 모아서 돌려준다.
+  Future<BulkImportResult> bulkAddStudents(List<BulkStudentRow> rows) async {
+    _isWorking = true;
+    _bulkTotal = rows.length;
+    _bulkDone = 0;
+    notifyListeners();
+
+    int successCount = 0;
+    final failures = <String>[];
+
+    for (final row in rows) {
+      final (success, message) = await _createStudentRequest(
+        studentId: row.studentId,
+        name: row.name,
+        password: "1234",
+        grade: row.grade,
+      );
+      if (success) {
+        successCount++;
+      } else {
+        failures.add('${row.studentId} ${row.name}: $message');
+      }
+      _bulkDone++;
+      notifyListeners();
+    }
+
+    _isWorking = false;
+    notifyListeners();
+    return BulkImportResult(successCount: successCount, failures: failures);
+  }
+
   /// ➕ 학생 계정 추가. (성공여부, 메시지)를 반환한다 — UI가 성공했을 때만 입력칸을 비운다.
   Future<(bool success, String message)> addStudentAccount({
     required String studentId,
@@ -17,6 +119,28 @@ class TeacherStudentManagementController extends ChangeNotifier {
   }) async {
     _isWorking = true;
     notifyListeners();
+    try {
+      return await _createStudentRequest(
+        studentId: studentId,
+        name: name,
+        password: password,
+        grade: grade,
+      );
+    } finally {
+      _isWorking = false;
+      notifyListeners();
+    }
+  }
+
+  /// 실제 계정 생성 HTTP 요청. isWorking 상태는 건드리지 않는다 —
+  /// 단건 등록(addStudentAccount)과 일괄 등록(bulkAddStudents) 양쪽에서
+  /// 각자 알맞은 시점에 isWorking을 관리하기 위해 분리했다.
+  Future<(bool success, String message)> _createStudentRequest({
+    required String studentId,
+    required String name,
+    required String password,
+    int? grade,
+  }) async {
     try {
       final url = Uri.parse('$baseUrl/api/users/create');
       final response = await http.post(
@@ -38,9 +162,6 @@ class TeacherStudentManagementController extends ChangeNotifier {
       }
     } catch (e) {
       return (false, '🚨 네트워크 에러: $e');
-    } finally {
-      _isWorking = false;
-      notifyListeners();
     }
   }
 

lib/ui/teacher_student_management_page.dart

@@ -1,6 +1,9 @@
 // 👥 교사용 학생 계정 관리 화면 (UI 전용). 신규 학생 계정 추가 폼과 강제 삭제 다이얼로그를 그린다.
 // 서버 통신/상태는 lib/function/teacher_student_management_controller.dart가 담당한다.
+import 'dart:typed_data';
+import 'package:desktop_drop/desktop_drop.dart';
 import 'package:flutter/material.dart';
+import '../function/excel_file_picker.dart';
 import '../function/teacher_student_management_controller.dart';
 
 // -----------------------------------------------------------------------------
@@ -22,6 +25,7 @@ class _TeacherStudentManagementPageState
   final TextEditingController _addNameController = TextEditingController();
   final TextEditingController _addPwController = TextEditingController();
   int? _selectedGrade;
+  bool _isDragging = false;
 
   @override
   void dispose() {
@@ -63,6 +67,183 @@ class _TeacherStudentManagementPageState
     ).showSnackBar(SnackBar(content: Text(message)));
   }
 
+  // 📄 [파일 선택 버튼 동작] "파일 선택"으로 엑셀 고르기
+  Future<void> _pickExcelFile() async {
+    final bytes = await pickExcelFileBytes();
+    if (bytes == null) return;
+    if (!mounted) return;
+    await _handleExcelBytes(bytes);
+  }
+
+  // 📄 엑셀 바이트를 파싱해서 미리보기 다이얼로그를 띄운다 (드래그/파일선택 공용).
+  Future<void> _handleExcelBytes(Uint8List bytes) async {
+    List<BulkStudentRow> rows;
+    try {
+      rows = _controller.parseExcelBytes(bytes);
+    } catch (e) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(SnackBar(content: Text('❌ 엑셀 파일을 읽는 데 실패했습니다: $e')));
+      return;
+    }
+    if (rows.isEmpty) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(
+          content: Text('⚠️ 유효한 학생 데이터를 찾지 못했습니다. (1행은 머리글로 건너뜁니다)'),
+        ),
+      );
+      return;
+    }
+    _showBulkPreviewDialog(rows);
+  }
+
+  // 📋 [일괄 등록 확인 팝업] 엑셀에서 뽑아낸 명단을 미리 보여주고 확정받는다.
+  void _showBulkPreviewDialog(List<BulkStudentRow> rows) {
+    showDialog(
+      context: context,
+      builder: (context) => AlertDialog(
+        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(24)),
+        title: Text('📄 ${rows.length}명 확인됨'),
+        content: SizedBox(
+          width: 400,
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              const Text(
+                '아래 명단으로 계정을 일괄 생성합니다 (초기 비밀번호: 1234).',
+                style: TextStyle(color: Colors.black54, fontSize: 13),
+              ),
+              const SizedBox(height: 12),
+              ConstrainedBox(
+                constraints: const BoxConstraints(maxHeight: 300),
+                child: ListView.builder(
+                  shrinkWrap: true,
+                  itemCount: rows.length,
+                  itemBuilder: (context, i) {
+                    final row = rows[i];
+                    return ListTile(
+                      dense: true,
+                      leading: CircleAvatar(
+                        radius: 14,
+                        child: Text(
+                          '${i + 1}',
+                          style: const TextStyle(fontSize: 11),
+                        ),
+                      ),
+                      title: Text('${row.name} (${row.studentId})'),
+                      trailing: Text(
+                        row.grade != null ? '${row.grade}학년' : '미배정',
+                        style: TextStyle(color: Colors.grey[600]),
+                      ),
+                    );
+                  },
+                ),
+              ),
+            ],
+          ),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(context),
+            child: const Text('취소', style: TextStyle(color: Colors.grey)),
+          ),
+          ElevatedButton(
+            onPressed: () {
+              Navigator.pop(context);
+              _runBulkImport(rows);
+            },
+            style: ElevatedButton.styleFrom(
+              backgroundColor: Colors.orange,
+              foregroundColor: Colors.white,
+              shape: RoundedRectangleBorder(
+                borderRadius: BorderRadius.circular(12),
+              ),
+            ),
+            child: Text('${rows.length}명 일괄 등록'),
+          ),
+        ],
+      ),
+    );
+  }
+
+  // 🚀 실제 일괄 등록 실행 + 진행 상황 표시 + 결과 요약 팝업.
+  Future<void> _runBulkImport(List<BulkStudentRow> rows) async {
+    showDialog(
+      context: context,
+      barrierDismissible: false,
+      builder: (context) => ListenableBuilder(
+        listenable: _controller,
+        builder: (context, _) => AlertDialog(
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(24),
+          ),
+          content: Row(
+            children: [
+              const CircularProgressIndicator(),
+              const SizedBox(width: 20),
+              Text(
+                '등록 중... (${_controller.bulkDone}/${_controller.bulkTotal})',
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+
+    final result = await _controller.bulkAddStudents(rows);
+
+    if (!mounted) return;
+    Navigator.pop(context); // 진행 팝업 닫기
+
+    showDialog(
+      context: context,
+      builder: (context) => AlertDialog(
+        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(24)),
+        title: Text(
+          result.failures.isEmpty ? '✅ 일괄 등록 완료' : '⚠️ 일괄 등록 완료 (일부 실패)',
+        ),
+        content: SizedBox(
+          width: 400,
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              Text(
+                '성공 ${result.successCount}명 / 실패 ${result.failures.length}명',
+              ),
+              if (result.failures.isNotEmpty) ...[
+                const SizedBox(height: 12),
+                const Text(
+                  '실패 목록',
+                  style: TextStyle(fontWeight: FontWeight.bold),
+                ),
+                const SizedBox(height: 6),
+                ConstrainedBox(
+                  constraints: const BoxConstraints(maxHeight: 200),
+                  child: SingleChildScrollView(
+                    child: Text(
+                      result.failures.join('\n'),
+                      style: const TextStyle(fontSize: 12, color: Colors.red),
+                    ),
+                  ),
+                ),
+              ],
+            ],
+          ),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(context),
+            child: const Text('확인'),
+          ),
+        ],
+      ),
+    );
+  }
+
   // 🏫 [기존 학생 학년 지정/변경 다이얼로그]
   void _showUpdateGradeDialog() {
     final TextEditingController idController = TextEditingController();
@@ -377,6 +558,90 @@ class _TeacherStudentManagementPageState
                 ),
                 const SizedBox(height: 36),
 
+                // 🏷️ 인디케이터 바 (엑셀 일괄 등록)
+                Row(
+                  children: [
+                    Container(
+                      width: 4,
+                      height: 16,
+                      decoration: BoxDecoration(
+                        color: Colors.orange,
+                        borderRadius: BorderRadius.circular(2),
+                      ),
+                    ),
+                    const SizedBox(width: 8),
+                    const Text(
+                      '엑셀로 한번에 추가 (신입생 등)',
+                      style: TextStyle(
+                        fontSize: 18,
+                        fontWeight: FontWeight.bold,
+                      ),
+                    ),
+                  ],
+                ),
+                const SizedBox(height: 16),
+
+                DropTarget(
+                  onDragEntered: (_) => setState(() => _isDragging = true),
+                  onDragExited: (_) => setState(() => _isDragging = false),
+                  onDragDone: (details) async {
+                    setState(() => _isDragging = false);
+                    if (details.files.isEmpty) return;
+                    final bytes = await details.files.first.readAsBytes();
+                    if (!mounted) return;
+                    await _handleExcelBytes(bytes);
+                  },
+                  child: InkWell(
+                    onTap: _pickExcelFile,
+                    borderRadius: BorderRadius.circular(24),
+                    child: Container(
+                      width: double.infinity,
+                      padding: const EdgeInsets.symmetric(vertical: 28),
+                      decoration: BoxDecoration(
+                        color: _isDragging ? Colors.orange[50] : Colors.white,
+                        borderRadius: BorderRadius.circular(24),
+                        border: Border.all(
+                          color: _isDragging
+                              ? Colors.orange
+                              : Colors.grey.shade300,
+                          width: _isDragging ? 2 : 1,
+                        ),
+                      ),
+                      child: Column(
+                        children: [
+                          Icon(
+                            Icons.upload_file_rounded,
+                            size: 40,
+                            color: _isDragging
+                                ? Colors.orange
+                                : Colors.grey[400],
+                          ),
+                          const SizedBox(height: 12),
+                          Text(
+                            _isDragging ? '여기에 놓으세요' : '엑셀 파일을 드래그하거나 눌러서 선택',
+                            style: TextStyle(
+                              fontWeight: FontWeight.bold,
+                              color: _isDragging
+                                  ? Colors.orange[800]
+                                  : Colors.black87,
+                            ),
+                          ),
+                          const SizedBox(height: 4),
+                          Text(
+                            '.xlsx · 1행은 머리글, A열=학번 B열=이름 C열=학년(선택)',
+                            style: TextStyle(
+                              fontSize: 12,
+                              color: Colors.grey[500],
+                            ),
+                            textAlign: TextAlign.center,
+                          ),
+                        ],
+                      ),
+                    ),
+                  ),
+                ),
+                const SizedBox(height: 36),
+
                 // 🏷️ 인디케이터 바 (기존 학생 학년 지정/변경)
                 Row(
                   children: [

linux/flutter/generated_plugin_registrant.cc

@@ -6,6 +6,10 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <desktop_drop/desktop_drop_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
+  g_autoptr(FlPluginRegistrar) desktop_drop_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "DesktopDropPlugin");
+  desktop_drop_plugin_register_with_registrar(desktop_drop_registrar);
 }

linux/flutter/generated_plugins.cmake

@@ -3,6 +3,7 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  desktop_drop
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,13 +5,17 @@
 import FlutterMacOS
 import Foundation
 
+import desktop_drop
 import device_info_plus
+import file_picker_darwin
 import firebase_core
 import firebase_messaging
 import flutter_local_notifications
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  DesktopDropPlugin.register(with: registry.registrar(forPlugin: "DesktopDropPlugin"))
   DeviceInfoPlusMacosPlugin.register(with: registry.registrar(forPlugin: "DeviceInfoPlusMacosPlugin"))
+  FilePickerPlugin.register(with: registry.registrar(forPlugin: "FilePickerPlugin"))
   FLTFirebaseCorePlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseCorePlugin"))
   FLTFirebaseMessagingPlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseMessagingPlugin"))
   FlutterLocalNotificationsPlugin.register(with: registry.registrar(forPlugin: "FlutterLocalNotificationsPlugin"))

pubspec.lock

@@ -9,6 +9,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.75"
+  android_file_picker:
+    dependency: transitive
+    description:
+      name: android_file_picker
+      sha256: "1f111ed6bb33724ba782cc86357e3fd97f57051d55fc61adf33dcfc5049a1581"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.3"
+  archive:
+    dependency: transitive
+    description:
+      name: archive
+      sha256: cb6a278ef2dbb298455e1a713bda08524a175630ec643a242c399c932a0a1f7d
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.6.1"
   args:
     dependency: transitive
     description:
@@ -57,6 +73,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.19.1"
+  cross_file:
+    dependency: transitive
+    description:
+      name: cross_file
+      sha256: f141ea4f277af142a0356955707f6556f37b03947d39d55585981a06ca437bd6
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.5+5"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: c8ea0233063ba03258fbcf2ca4d6dadfefe14f02fab57702265467a19f27fadf
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.7"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -73,6 +105,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.14"
+  desktop_drop:
+    dependency: "direct main"
+    description:
+      name: desktop_drop
+      sha256: c65d1f959ccf4bb6803f984303d03e1e0dd4c0f73a3a2eca2d1b46d48ea16999
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.8.2"
   device_info_plus:
     dependency: "direct main"
     description:
@@ -89,6 +129,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "8.1.0"
+  equatable:
+    dependency: transitive
+    description:
+      name: equatable
+      sha256: "3bce007a596ff8b3119c45d68aaef631272537c03d30e5d4534dd24bf4c5eaa2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
+  excel:
+    dependency: "direct main"
+    description:
+      name: excel
+      sha256: "1a15327dcad260d5db21d1f6e04f04838109b39a2f6a84ea486ceda36e468780"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.6"
   fake_async:
     dependency: transitive
     description:
@@ -121,6 +177,46 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "7.0.1"
+  file_picker:
+    dependency: "direct main"
+    description:
+      name: file_picker
+      sha256: b7acb5d123cb398f6b4a8a38e43777545254f8fc1fabef3ee11cbbb56aece9c8
+      url: "https://pub.dev"
+    source: hosted
+    version: "12.1.2"
+  file_picker_darwin:
+    dependency: transitive
+    description:
+      name: file_picker_darwin
+      sha256: "6e7cae501d48fd57a27911608db718ebd898e6ccf934bf09e33a8c0d0365bec0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
+  file_picker_linux:
+    dependency: transitive
+    description:
+      name: file_picker_linux
+      sha256: f0f01ed42967b7355f6f25c8b121ea531d1948e2a9b4b44f4b4de8489d7b04ae
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.2"
+  file_picker_platform_interface:
+    dependency: transitive
+    description:
+      name: file_picker_platform_interface
+      sha256: "11ef1b5c14d9186b4788cc273dd8d5cb81bca847145060991a28234ff7916fc1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.0"
+  file_picker_web:
+    dependency: transitive
+    description:
+      name: file_picker_web
+      sha256: df472142f63c4557fdfbb375c81454ca1c251491069eefcdc6a866bc12f8750b
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.3"
   firebase_core:
     dependency: "direct main"
     description:
@@ -517,6 +613,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
+  universal_platform:
+    dependency: transitive
+    description:
+      name: universal_platform
+      sha256: "64e16458a0ea9b99260ceb5467a214c1f298d647c659af1bff6d3bf82536b1ec"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
   vector_math:
     dependency: transitive
     description:
@@ -550,7 +654,7 @@ packages:
     source: hosted
     version: "15.2.0"
   web:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: web
       sha256: "868d88a33d8a87b18ffc05f9f030ba328ffefba92d6c127917a2ba740f9cfe4a"
@@ -573,6 +677,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.3"
+  windows_file_picker:
+    dependency: transitive
+    description:
+      name: windows_file_picker
+      sha256: "225f58e64c15c2d7b34fb8faf3ca188831967f26b5a723d7c3a7969e41c9b5a5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
   xdg_directories:
     dependency: transitive
     description:

pubspec.yaml

@@ -52,6 +52,10 @@ dependencies:
 
   # 📳 무단 반출 감지 시 진동 (백그라운드 서비스에서도 동작하도록 HapticFeedback 대신 사용)
   vibration: ^3.2.0
+  excel: ^4.0.6
+  file_picker: ^12.1.2
+  desktop_drop: ^0.8.2
+  web: ^1.1.1
 
 dev_dependencies:
   flutter_test:
@@ -63,11 +67,6 @@ dev_dependencies:
   # package. See that file for information about deactivating specific lint
   # rules and activating additional ones.
   flutter_lints: ^6.0.0
-
-# For information on the generic Dart part of this file, see the
-# following page: https://dart.dev/tools/pub/pubspec
-
-# The following section is specific to Flutter packages.
 flutter:
 
   # The following line ensures that the Material Icons font is

windows/flutter/generated_plugin_registrant.cc

@@ -6,10 +6,13 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <desktop_drop/desktop_drop_plugin.h>
 #include <firebase_core/firebase_core_plugin_c_api.h>
 #include <permission_handler_windows/permission_handler_windows_plugin.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
+  DesktopDropPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("DesktopDropPlugin"));
   FirebaseCorePluginCApiRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("FirebaseCorePluginCApi"));
   PermissionHandlerWindowsPluginRegisterWithRegistrar(

windows/flutter/generated_plugins.cmake

@@ -3,6 +3,7 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  desktop_drop
   firebase_core
   permission_handler_windows
 )