release: 1.1.5 Android 빌드 호환성 수정

AGP 9 환경에서 desktop_drop 플러그인의 Kotlin Gradle Plugin
적용 방식이 깨져 있어 릴리즈 APK 빌드가 실패하던 문제를 해결.
desktop_drop을 0.8.3으로 올리고, :desktop_drop 서브프로젝트에
kotlin-android 플러그인을 명시적으로 적용하도록 root build.gradle.kts에
예외 처리 추가.

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

android/build.gradle.kts

@@ -26,6 +26,11 @@ subprojects {
 tasks.register<Delete>("clean") {
     delete(rootProject.layout.buildDirectory)
 }
+subprojects {
+    if (project.name == "desktop_drop") {
+        pluginManager.apply("org.jetbrains.kotlin.android")
+    }
+}
 subprojects {
     plugins.withId("com.android.library") {
         extensions.configure<com.android.build.gradle.BaseExtension> {

lib/debug_pocket_main.dart

@@ -13,10 +13,7 @@ class DebugPocketApp extends StatelessWidget {
   Widget build(BuildContext context) {
     return const MaterialApp(
       debugShowCheckedModeBanner: false,
-      home: NfcPocketCheckInScreen(
-        studentId: "2061",
-        studentName: "디버그테스트",
-      ),
+      home: NfcPocketCheckInScreen(studentId: "2061", studentName: "디버그테스트"),
     );
   }
 }

lib/function/admin_controller.dart

@@ -17,12 +17,12 @@ class AdminController extends ChangeNotifier {
     try {
       final response = await http.get(url);
       if (response.statusCode == 200) {
-        return '💥 DB가 깔끔하게 초기화되었습니다! (출석 번호 1번부터 시작)';
+        return 'DB가 깔끔하게 초기화되었습니다! (출석 번호 1번부터 시작)';
       } else {
-        return '❌ 초기화 실패: 서버 권한 오류 (${response.statusCode})';
+        return '초기화 실패: 서버 권한 오류 (${response.statusCode})';
       }
     } catch (e) {
-      return '❌ 네트워크 에러: 서버와 연결할 수 없습니다.';
+      return '네트워크 에러: 서버와 연결할 수 없습니다.';
     } finally {
       _isLoading = false;
       notifyListeners();

lib/function/dashboard_layout_controller.dart

@@ -0,0 +1,158 @@
+// 🧩 대시보드 타일 배치(위치/크기)의 서버 통신/상태 담당 컨트롤러.
+// 캔버스는 6열×4행 고정, 타일 크기는 1x1~4x4. 계정별로 서버(계정=userId)에 저장한다.
+import 'dart:convert';
+import 'package:flutter/foundation.dart';
+import 'package:http/http.dart' as http;
+import '../config.dart';
+import '../models/dashboard_tile_layout.dart';
+
+class DashboardLayoutController extends ChangeNotifier {
+  final String userId;
+  DashboardLayoutController(this.userId);
+
+  Map<String, TileRect> _positions = {};
+  bool _isLoading = true;
+  bool _isSaving = false;
+  bool _isEditing = false;
+
+  Map<String, TileRect> get positions => _positions;
+  bool get isLoading => _isLoading;
+  bool get isSaving => _isSaving;
+  bool get isEditing => _isEditing;
+
+  void enterEditMode() {
+    _isEditing = true;
+    notifyListeners();
+  }
+
+  /// 편집 중이던 변경을 서버에 저장하지 않고 그대로 유지한 채 편집 모드만 끈다.
+  /// (저장은 [save]를 명시적으로 불러야 함 — 완료 버튼이 save+exit를 같이 호출한다.)
+  void exitEditMode() {
+    _isEditing = false;
+    notifyListeners();
+  }
+
+  /// 서버에 저장된 배치를 불러오고, 현재 화면에 보여야 할 타일 id 목록([visibleIds]) 중
+  /// 저장된 값이 없는 새 타일은 빈 칸을 찾아 1x1로 자동 배치한다.
+  Future<void> load(List<String> visibleIds) async {
+    _isLoading = true;
+    notifyListeners();
+
+    Map<String, TileRect> loaded = {};
+    try {
+      final response = await http.get(
+        Uri.parse('$baseUrl/api/dashboard/layout?userId=$userId'),
+      );
+      if (response.statusCode == 200) {
+        final data = jsonDecode(utf8.decode(response.bodyBytes));
+        final rawLayout = data['layout'];
+        if (rawLayout is List) {
+          for (final item in rawLayout) {
+            final id = item['id']?.toString();
+            if (id == null) continue;
+            final rect = TileRect.fromJson(item);
+            if (rect.isWithinCanvas) loaded[id] = rect;
+          }
+        }
+      }
+    } catch (_) {
+      // 새로고침 실패는 조용히 무시하고 기본 배치로 대체한다.
+    }
+
+    _positions = _fillDefaults(loaded, visibleIds);
+    _isLoading = false;
+    notifyListeners();
+  }
+
+  Map<String, TileRect> _fillDefaults(
+    Map<String, TileRect> existing,
+    List<String> ids,
+  ) {
+    final Map<String, TileRect> result = {};
+    for (final id in ids) {
+      final saved = existing[id];
+      if (saved != null && !_collidesWithAny(result, saved, null)) {
+        result[id] = saved;
+      }
+    }
+    for (final id in ids) {
+      if (result.containsKey(id)) continue;
+      final spot = _findFirstFit(result, 1, 1);
+      if (spot != null) {
+        result[id] = TileRect(x: spot.$1, y: spot.$2, w: 1, h: 1);
+      }
+      // 캔버스(6x4=24칸)가 꽉 찼으면 자리를 못 찾을 수도 있음 — 그 타일은 화면에 안 보이게 됨.
+    }
+    return result;
+  }
+
+  bool _collidesWithAny(
+    Map<String, TileRect> placed,
+    TileRect candidate,
+    String? ignoreId,
+  ) {
+    for (final entry in placed.entries) {
+      if (entry.key == ignoreId) continue;
+      if (entry.value.overlaps(candidate)) return true;
+    }
+    return false;
+  }
+
+  (int, int)? _findFirstFit(Map<String, TileRect> placed, int w, int h) {
+    for (int y = 0; y <= kGridRows - h; y++) {
+      for (int x = 0; x <= kGridCols - w; x++) {
+        final candidate = TileRect(x: x, y: y, w: w, h: h);
+        if (!_collidesWithAny(placed, candidate, null)) return (x, y);
+      }
+    }
+    return null;
+  }
+
+  bool _fits(String movingId, TileRect candidate) {
+    if (!candidate.isWithinCanvas) return false;
+    return !_collidesWithAny(_positions, candidate, movingId);
+  }
+
+  /// 타일을 (newX, newY)로 옮긴다. 다른 타일과 겹치거나 캔버스를 벗어나면 무시하고 false 반환.
+  bool tryMove(String id, int newX, int newY) {
+    final cur = _positions[id];
+    if (cur == null) return false;
+    final candidate = cur.copyWith(x: newX, y: newY);
+    if (!_fits(id, candidate)) return false;
+    _positions = {..._positions, id: candidate};
+    notifyListeners();
+    return true;
+  }
+
+  /// 타일 크기를 (newW, newH)로 바꾼다. 다른 타일과 겹치거나 4x4/캔버스를 벗어나면 무시.
+  bool tryResize(String id, int newW, int newH) {
+    final cur = _positions[id];
+    if (cur == null) return false;
+    final candidate = cur.copyWith(w: newW, h: newH);
+    if (!_fits(id, candidate)) return false;
+    _positions = {..._positions, id: candidate};
+    notifyListeners();
+    return true;
+  }
+
+  Future<void> save() async {
+    _isSaving = true;
+    notifyListeners();
+    try {
+      final layout = _positions.entries
+          .map((e) => e.value.toJson(e.key))
+          .toList();
+      await http.post(
+        Uri.parse('$baseUrl/api/dashboard/layout'),
+        headers: {"Content-Type": "application/json"},
+        body: jsonEncode({"userId": userId, "layout": layout}),
+      );
+    } catch (_) {
+      // 저장 실패해도 로컬 배치는 유지 — 다음에 다시 시도 가능.
+    } finally {
+      _isSaving = false;
+      _isEditing = false;
+      notifyListeners();
+    }
+  }
+}

lib/function/device_checkout_controller.dart

@@ -0,0 +1,48 @@
+// 📱 스마트기기(패드) 반출 신청 화면의 기능(서버 통신/상태) 담당 컨트롤러.
+// NFC가 안 되는 패드용 대체 절차 — 시작~종료 시각과 사용 목적을 적어 신청하면
+// 선생님 승인 후 저울(아두이노)이 실제 픽업/반납 여부를 감시한다 (하드웨어는 나중에 붙임).
+import 'dart:convert';
+import 'package:flutter/foundation.dart';
+import 'package:http/http.dart' as http;
+import '../config.dart';
+
+class DeviceCheckoutController extends ChangeNotifier {
+  bool _isSubmitting = false;
+  bool get isSubmitting => _isSubmitting;
+
+  /// ➕ 반출 요청 제출. (성공여부, 메시지)를 반환한다.
+  Future<(bool success, String message)> submitRequest({
+    required String studentId,
+    required String studentName,
+    required String purpose,
+    required String startTime,
+    required String endTime,
+  }) async {
+    _isSubmitting = true;
+    notifyListeners();
+    try {
+      final response = await http.post(
+        Uri.parse('$baseUrl/api/device-checkout/request'),
+        headers: {"Content-Type": "application/json"},
+        body: jsonEncode({
+          "studentId": studentId,
+          "studentName": studentName,
+          "purpose": purpose,
+          "startTime": startTime,
+          "endTime": endTime,
+        }),
+      );
+      final result = jsonDecode(utf8.decode(response.bodyBytes));
+      if (response.statusCode == 200 && result['status'] == 'success') {
+        return (true, '${result['message'] ?? '요청이 접수되었습니다.'}');
+      } else {
+        return (false, '${result['message'] ?? '요청 실패'}');
+      }
+    } catch (e) {
+      return (false, '네트워크 에러: $e');
+    } finally {
+      _isSubmitting = false;
+      notifyListeners();
+    }
+  }
+}

lib/function/device_checkout_ledger_controller.dart

@@ -0,0 +1,100 @@
+// 📋 선생님용 "스마트기기 반출 대장" 화면의 기능(서버 통신/상태) 담당 컨트롤러.
+import 'dart:async';
+import 'dart:convert';
+import 'package:flutter/foundation.dart';
+import 'package:http/http.dart' as http;
+import '../config.dart';
+
+class DeviceCheckoutLedgerController extends ChangeNotifier {
+  List<dynamic> _requests = [];
+  bool _isLoading = true;
+  bool _isWorking = false;
+  Timer? _timer;
+  bool _disposed = false;
+
+  List<dynamic> get requests => _requests;
+  bool get isLoading => _isLoading;
+  bool get isWorking => _isWorking;
+
+  void _safeNotify() {
+    if (!_disposed) notifyListeners();
+  }
+
+  void init() {
+    fetchAll();
+    _timer = Timer.periodic(const Duration(seconds: 5), (_) => fetchAll());
+  }
+
+  @override
+  void dispose() {
+    _disposed = true;
+    _timer?.cancel();
+    super.dispose();
+  }
+
+  Future<void> fetchAll() async {
+    try {
+      final response = await http.get(
+        Uri.parse('$baseUrl/api/device-checkout/list'),
+      );
+      if (response.statusCode == 200) {
+        final data = jsonDecode(utf8.decode(response.bodyBytes));
+        _requests = data['requests'] ?? [];
+      }
+    } catch (_) {
+      // 새로고침 실패는 조용히 무시하고 마지막으로 받아온 목록을 유지한다.
+    } finally {
+      _isLoading = false;
+      _safeNotify();
+    }
+  }
+
+  // ✅ 승인 시 승인한 선생님 계정을 함께 보낸다 (대장에 "OOO 선생님이 허용했습니다" 표시 +
+  // 미반납 알림을 그 선생님에게만 보내기 위함).
+  Future<(bool success, String message)> approve(
+    int requestId, {
+    required String teacherId,
+    required String teacherName,
+  }) async {
+    return _postAction('/api/device-checkout/approve', {
+      "requestId": requestId,
+      "teacherId": teacherId,
+      "teacherName": teacherName,
+    });
+  }
+
+  Future<(bool success, String message)> reject(int requestId) async {
+    return _postAction('/api/device-checkout/reject', {"requestId": requestId});
+  }
+
+  // 🖐️ [하드웨어 자동 감지 전까지 임시] 선생님이 기기를 실제로 돌려받았을 때 누르는 버튼.
+  Future<(bool success, String message)> confirmReturn(int requestId) async {
+    return _postAction('/api/device-checkout/return', {"requestId": requestId});
+  }
+
+  Future<(bool success, String message)> _postAction(
+    String path,
+    Map<String, dynamic> body,
+  ) async {
+    _isWorking = true;
+    _safeNotify();
+    try {
+      final response = await http.post(
+        Uri.parse('$baseUrl$path'),
+        headers: {"Content-Type": "application/json"},
+        body: jsonEncode(body),
+      );
+      final result = jsonDecode(utf8.decode(response.bodyBytes));
+      if (response.statusCode == 200 && result['status'] == 'success') {
+        await fetchAll();
+        return (true, '${result['message'] ?? '처리되었습니다.'}');
+      }
+      return (false, '${result['message'] ?? '처리 실패'}');
+    } catch (e) {
+      return (false, '네트워크 에러: $e');
+    } finally {
+      _isWorking = false;
+      _safeNotify();
+    }
+  }
+}

lib/function/login_controller.dart

@@ -17,10 +17,8 @@ class LoginResult {
   final bool isDeviceMatched;
   final String? errorMessage;
 
-  const LoginResult.masterSuccess({
-    required this.studentId,
-    required this.name,
-  }) : outcome = LoginOutcome.masterSuccess,
+  const LoginResult.masterSuccess({required this.studentId, required this.name})
+    : outcome = LoginOutcome.masterSuccess,
       role = null,
       isDeviceMatched = true,
       errorMessage = null;
@@ -55,16 +53,13 @@ class LoginController extends ChangeNotifier {
 
   Future<LoginResult> login(String id, String password) async {
     if (id.isEmpty || password.isEmpty) {
-      return const LoginResult.error('⚠️ 학번과 비밀번호를 모두 입력해 주세요.');
+      return const LoginResult.error('학번과 비밀번호를 모두 입력해 주세요.');
     }
 
     // 🔥 [개발자 마스터 계정]
     if (id == "2061") {
       if (password == "happy9642!") {
-        return const LoginResult.masterSuccess(
-          studentId: "2061",
-          name: "훗춧가룻",
-        );
+        return const LoginResult.masterSuccess(studentId: "2061", name: "훗춧가룻");
       } else {
         return const LoginResult.error('개발자 계정의 마스터 비밀번호가 올바르지 않습니다.');
       }
@@ -200,9 +195,9 @@ class LoginController extends ChangeNotifier {
       final resData = jsonDecode(utf8.decode(response.bodyBytes));
 
       if (response.statusCode == 200 && resData['status'] == 'success') {
-        return (true, '✅ 비밀번호가 변경되었습니다!');
+        return (true, '비밀번호가 변경되었습니다!');
       } else {
-        return (false, '❌ 실패: ${resData['message']}');
+        return (false, '실패: ${resData['message']}');
       }
     } catch (e) {
       return (false, '서버 에러 발생: $e');

lib/function/nfc_pocket_checkin_controller.dart

@@ -17,8 +17,12 @@ import '../config.dart' show baseUrl;
 // 🛡️ iOS 근접센서 감시용 네이티브 채널 (ios/Runner/ProximityMonitorPlugin.swift 참고).
 // 조도 센서 API가 없는 iOS에서, 통화 중 화면이 꺼지는 것과 같은 원리인
 // 근접센서로 "주머니 안/밖" 상태 변화를 감지해 대체한다.
-const MethodChannel _proximityMethodChannel = MethodChannel('proximity_monitor');
-const EventChannel _proximityEventChannel = EventChannel('proximity_monitor/events');
+const MethodChannel _proximityMethodChannel = MethodChannel(
+  'proximity_monitor',
+);
+const EventChannel _proximityEventChannel = EventChannel(
+  'proximity_monitor/events',
+);
 
 enum WatchMessageLevel { info, success, warning, error }
 
@@ -78,9 +82,9 @@ class NfcPocketCheckinController extends ChangeNotifier {
       // 화면이 열려있는 동안은 실시간으로 위반 알림을 받아 팝업을 띄운다.
       // 무단 반출이 한 번 감지되면 "신뢰된 감시 세션"은 끝난 것으로 보고,
       // 다음 태깅은 체크아웃이 아니라 새 출석(재출석)으로 처리되도록 감시 상태를 해제한다.
-      _violationSub = FlutterBackgroundService().on('violation_detected').listen((
-        event,
-      ) {
+      _violationSub = FlutterBackgroundService()
+          .on('violation_detected')
+          .listen((event) {
             _isWatching = false;
             notifyListeners();
             onViolationDetected(event?['pocketNumber']?.toString());
@@ -91,9 +95,9 @@ class NfcPocketCheckinController extends ChangeNotifier {
       ) {
         _isWatching = false;
         _activePocketNumber = null;
-        _statusMessage = "✅ 폰을 회수했습니다. 수고하셨습니다!";
+        _statusMessage = "폰을 회수했습니다. 수고하셨습니다!";
         notifyListeners();
-        onMessage("✅ 폰이 정상적으로 회수되었습니다.", WatchMessageLevel.success);
+        onMessage("폰이 정상적으로 회수되었습니다.", WatchMessageLevel.success);
       });
     }
   }
@@ -117,7 +121,7 @@ class NfcPocketCheckinController extends ChangeNotifier {
   void _startNfcSession() async {
     bool isAvailable = await NfcManager.instance.isAvailable();
     if (!isAvailable) {
-      _statusMessage = "❌ 이 스마트폰은 NFC 기능이 꺼져있거나 지원되지 않습니다.";
+      _statusMessage = "이 스마트폰은 NFC 기능이 꺼져있거나 지원되지 않습니다.";
       notifyListeners();
       return;
     }
@@ -134,7 +138,7 @@ class NfcPocketCheckinController extends ChangeNotifier {
         }
 
         _isProcessing = true;
-        _statusMessage = "⏳ 태그 인식 완료! 서버에 출석 전송 중...";
+        _statusMessage = "태그 인식 완료! 서버에 출석 전송 중...";
         notifyListeners();
 
         try {
@@ -163,7 +167,7 @@ class NfcPocketCheckinController extends ChangeNotifier {
             tagUid: _getTagUid(tag),
           );
         } catch (e) {
-          onMessage("❌ 태그 읽기 실패: $e", WatchMessageLevel.error);
+          onMessage("태그 읽기 실패: $e", WatchMessageLevel.error);
         } finally {
           // 3초 후 연타 방지 해제 (쿨다운)
           await Future.delayed(const Duration(seconds: 3));
@@ -216,16 +220,16 @@ class NfcPocketCheckinController extends ChangeNotifier {
             onMessage("ℹ️ 이 기기는 백그라운드 감시를 지원하지 않습니다.", WatchMessageLevel.info);
           }
         } else {
-          onMessage("⚠️ 출석 실패: ${result['message']}", WatchMessageLevel.warning);
+          onMessage("출석 실패: ${result['message']}", WatchMessageLevel.warning);
         }
       } else {
         onMessage(
-          "🚨 서버 에러 (코드: ${response.statusCode})",
+          "서버 에러 (코드: ${response.statusCode})",
           WatchMessageLevel.error,
         );
       }
     } catch (e) {
-      onMessage("❌ 서버 연결 실패: $e", WatchMessageLevel.error);
+      onMessage("서버 연결 실패: $e", WatchMessageLevel.error);
     }
   }
 
@@ -255,7 +259,7 @@ class NfcPocketCheckinController extends ChangeNotifier {
 
     _isWatching = true;
     _activePocketNumber = pocketNumber;
-    _statusMessage = "🛡️ 백그라운드에서 감시 중입니다. 화면을 꺼도 계속 감시돼요.";
+    _statusMessage = "백그라운드에서 감시 중입니다. 화면을 꺼도 계속 감시돼요.";
     notifyListeners();
   }
 
@@ -268,9 +272,9 @@ class NfcPocketCheckinController extends ChangeNotifier {
     }
     _isWatching = false;
     _activePocketNumber = null;
-    _statusMessage = "✅ 폰을 회수했습니다. 감시가 종료되었습니다.";
+    _statusMessage = "폰을 회수했습니다. 감시가 종료되었습니다.";
     notifyListeners();
-    onMessage("✅ 감시가 종료되었습니다. 수고하셨습니다!", WatchMessageLevel.success);
+    onMessage("감시가 종료되었습니다. 수고하셨습니다!", WatchMessageLevel.success);
   }
 
   // -----------------------------------------------------------------------
@@ -291,13 +295,13 @@ class NfcPocketCheckinController extends ChangeNotifier {
 
     _activePocketNumber = pocketNumber;
     _isWatching = true;
-    _statusMessage = "📥 주머니에 넣는 중...";
+    _statusMessage = "주머니에 넣는 중...";
     notifyListeners();
 
     try {
       await _proximityMethodChannel.invokeMethod('start');
     } catch (e) {
-      onMessage("❌ 근접센서 감시 시작 실패: $e", WatchMessageLevel.error);
+      onMessage("근접센서 감시 시작 실패: $e", WatchMessageLevel.error);
       _isWatching = false;
       _isIosProximityWatch = false;
       notifyListeners();
@@ -307,7 +311,7 @@ class NfcPocketCheckinController extends ChangeNotifier {
     // 학생이 폰을 주머니에 넣을 시간을 준 뒤, 그 시점 상태를 기준값으로 삼는다.
     await Future.delayed(const Duration(seconds: 4));
 
-    _statusMessage = "🛡️ 감시 중입니다. 화면을 잠그지 말고 주머니에 넣어주세요.";
+    _statusMessage = "감시 중입니다. 화면을 잠그지 말고 주머니에 넣어주세요.";
     notifyListeners();
 
     _proximitySub = _proximityEventChannel.receiveBroadcastStream().listen((
@@ -359,9 +363,9 @@ class NfcPocketCheckinController extends ChangeNotifier {
 
     if (isPermitted) {
       _activePocketNumber = null;
-      _statusMessage = "✅ 폰을 회수했습니다. 수고하셨습니다!";
+      _statusMessage = "폰을 회수했습니다. 수고하셨습니다!";
       notifyListeners();
-      onMessage("✅ 폰이 정상적으로 회수되었습니다.", WatchMessageLevel.success);
+      onMessage("폰이 정상적으로 회수되었습니다.", WatchMessageLevel.success);
       return;
     }
 

lib/function/nfc_tag_writer_controller.dart

@@ -37,19 +37,19 @@ class NfcTagWriterController extends ChangeNotifier {
 
   Future<void> startWriteSession(String number) async {
     if (number.isEmpty) {
-      onMessage("⚠️ 주머니 번호를 입력해주세요.", true);
+      onMessage("주머니 번호를 입력해주세요.", true);
       return;
     }
     final String pocketLabel = "POCKET_$number";
 
     bool isAvailable = await NfcManager.instance.isAvailable();
     if (!isAvailable) {
-      onMessage("❌ NFC가 꺼져있거나 지원되지 않습니다.", true);
+      onMessage("NFC가 꺼져있거나 지원되지 않습니다.", true);
       return;
     }
 
     _isWriting = true;
-    _statusMessage = "📡 [$pocketLabel] 쓸 준비 완료! 스티커에 폰 뒷면을 대주세요.";
+    _statusMessage = "[$pocketLabel] 쓸 준비 완료! 스티커에 폰 뒷면을 대주세요.";
     notifyListeners();
 
     NfcManager.instance.startSession(
@@ -58,11 +58,11 @@ class NfcTagWriterController extends ChangeNotifier {
         try {
           final ndef = Ndef.from(tag);
           if (ndef == null) {
-            onMessage("❌ 이 태그는 NDEF 쓰기를 지원하지 않는 종류입니다.", true);
+            onMessage("이 태그는 NDEF 쓰기를 지원하지 않는 종류입니다.", true);
             return;
           }
           if (!ndef.isWritable) {
-            onMessage("❌ 이 태그는 쓰기 잠금(read-only) 상태입니다.", true);
+            onMessage("이 태그는 쓰기 잠금(read-only) 상태입니다.", true);
             return;
           }
 
@@ -78,8 +78,8 @@ class NfcTagWriterController extends ChangeNotifier {
 
           onMessage(
             tagUid != null
-                ? "✅ [$pocketLabel] 쓰기 + UID 등록 성공!"
-                : "⚠️ [$pocketLabel] 쓰기는 성공했지만 UID를 못 읽어 등록은 안 됐습니다.",
+                ? "[$pocketLabel] 쓰기 + UID 등록 성공!"
+                : "[$pocketLabel] 쓰기는 성공했지만 UID를 못 읽어 등록은 안 됐습니다.",
             tagUid == null,
           );
           // 다음 스티커를 연달아 쓰기 편하도록 번호를 자동으로 1 올려준다.
@@ -88,7 +88,7 @@ class NfcTagWriterController extends ChangeNotifier {
           _statusMessage = "다음 번호를 확인하고 '쓰기 시작'을 다시 눌러주세요.";
           notifyListeners();
         } catch (e) {
-          onMessage("❌ 쓰기 실패: $e", true);
+          onMessage("쓰기 실패: $e", true);
         } finally {
           await NfcManager.instance.stopSession();
           _isWriting = false;
@@ -117,7 +117,7 @@ class NfcTagWriterController extends ChangeNotifier {
         body: jsonEncode({"tagUid": tagUid, "pocketNumber": pocketLabel}),
       );
     } catch (e) {
-      onMessage("❌ 서버에 UID 등록 실패: $e", true);
+      onMessage("서버에 UID 등록 실패: $e", true);
     }
   }
 

lib/function/session_store.dart

@@ -0,0 +1,66 @@
+// 🔐 "로그인 유지" 기능. 로그인 성공 시 계정 정보를 기기에 저장해두고,
+// 다음 실행 때 로그인 화면을 건너뛰고 바로 대시보드로 들어가게 한다.
+// (서버에 별도 세션/토큰 개념이 없어서, 비밀번호는 저장하지 않고 신원 정보만 저장한다.)
+import 'dart:convert';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class SavedSession {
+  final String userId;
+  final String userName;
+  final String role;
+  final bool isDeviceMatched;
+
+  const SavedSession({
+    required this.userId,
+    required this.userName,
+    required this.role,
+    required this.isDeviceMatched,
+  });
+
+  Map<String, dynamic> toJson() => {
+    'userId': userId,
+    'userName': userName,
+    'role': role,
+    'isDeviceMatched': isDeviceMatched,
+  };
+
+  factory SavedSession.fromJson(Map<String, dynamic> json) => SavedSession(
+    userId: json['userId'] as String,
+    userName: json['userName'] as String,
+    role: json['role'] as String,
+    isDeviceMatched: json['isDeviceMatched'] as bool? ?? true,
+  );
+}
+
+class SessionStore {
+  static const _key = 'saved_session_v1';
+
+  static Future<void> save(SavedSession session) async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.setString(_key, jsonEncode(session.toJson()));
+    } catch (_) {
+      // 저장 실패해도 로그인 자체는 계속 진행 (로그인 유지만 안 될 뿐).
+    }
+  }
+
+  static Future<SavedSession?> load() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      final raw = prefs.getString(_key);
+      if (raw == null) return null;
+      return SavedSession.fromJson(jsonDecode(raw));
+    } catch (_) {
+      return null;
+    }
+  }
+
+  static Future<void> clear() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.remove(_key);
+    } catch (_) {
+      // 무시 - 어차피 로그아웃 화면으로는 이동한다.
+    }
+  }
+}

lib/function/student_dashboard_controller.dart

@@ -18,13 +18,13 @@ class StudentDashboardController extends ChangeNotifier {
       final response = await http.delete(url);
       if (response.statusCode == 200) {
         final responseData = jsonDecode(response.body);
-        return (true, '✅ ${responseData['message']}');
+        return (true, '${responseData['message']}');
       } else {
         final errorData = jsonDecode(response.body);
-        return (false, '❌ 삭제 실패: ${errorData['detail'] ?? '알 수 없는 오류'}');
+        return (false, '삭제 실패: ${errorData['detail'] ?? '알 수 없는 오류'}');
       }
     } catch (e) {
-      return (false, '❌ 서버와 연결할 수 없습니다. (네트워크 에러)');
+      return (false, '서버와 연결할 수 없습니다. (네트워크 에러)');
     } finally {
       _isLoading = false;
       notifyListeners();

lib/function/teacher_attendance_controller.dart

@@ -145,7 +145,7 @@ class TeacherAttendanceController extends ChangeNotifier {
       await fetchAll();
       return result['message'] ?? '하교 처리되었습니다.';
     } catch (e) {
-      return '❌ 하교 처리 실패: $e';
+      return '하교 처리 실패: $e';
     }
   }
 
@@ -161,7 +161,7 @@ class TeacherAttendanceController extends ChangeNotifier {
       await fetchAll();
       return result['message'] ?? '처리되었습니다.';
     } catch (e) {
-      return '❌ 반출 허용 실패: $e';
+      return '반출 허용 실패: $e';
     }
   }
 
@@ -177,7 +177,7 @@ class TeacherAttendanceController extends ChangeNotifier {
       await fetchAll();
       return result['message'] ?? '처리되었습니다.';
     } catch (e) {
-      return '❌ 설정 실패: $e';
+      return '설정 실패: $e';
     }
   }
 
@@ -193,7 +193,7 @@ class TeacherAttendanceController extends ChangeNotifier {
       await fetchAll();
       return result['message'] ?? '처리되었습니다.';
     } catch (e) {
-      return '❌ 출석시간 설정 실패: $e';
+      return '출석시간 설정 실패: $e';
     }
   }
 
@@ -207,7 +207,7 @@ class TeacherAttendanceController extends ChangeNotifier {
       await fetchAll();
       return result['message'] ?? '처리되었습니다.';
     } catch (e) {
-      return '❌ 초기화 실패: $e';
+      return '초기화 실패: $e';
     }
   }
 

lib/function/teacher_register_controller.dart

@@ -36,13 +36,13 @@ class TeacherRegisterController extends ChangeNotifier {
       final res = jsonDecode(response.body);
 
       if (response.statusCode == 200 && res['status'] == 'success') {
-        return (true, '✅ ${res['message']}');
+        return (true, '${res['message']}');
       } else {
         String errorMsg = res['detail'] ?? res['message'] ?? '회원가입에 실패했습니다.';
-        return (false, '❌ $errorMsg');
+        return (false, errorMsg);
       }
     } catch (e) {
-      return (false, '❌ 서버와 통신에 실패했습니다.');
+      return (false, '서버와 통신에 실패했습니다.');
     } finally {
       _isLoading = false;
       notifyListeners();

lib/function/teacher_student_management_controller.dart

@@ -76,11 +76,11 @@ class TeacherStudentManagementController extends ChangeNotifier {
       );
       if (response.statusCode == 200) {
         await fetchStudents();
-        return (true, '✅ $studentName 학생 기기 초기화 완료! (비밀번호도 1234로 초기화됨)');
+        return (true, '$studentName 학생 기기 초기화 완료! (비밀번호도 1234로 초기화됨)');
       }
-      return (false, '❌ 초기화 통신 실패');
+      return (false, '초기화 통신 실패');
     } catch (e) {
-      return (false, '❌ 초기화 통신 실패: $e');
+      return (false, '초기화 통신 실패: $e');
     } finally {
       _isWorking = false;
       notifyListeners();
@@ -211,12 +211,12 @@ class TeacherStudentManagementController extends ChangeNotifier {
       final result = jsonDecode(utf8.decode(response.bodyBytes));
 
       if (response.statusCode == 200 && result['status'] == 'success') {
-        return (true, '✅ ${result['message'] ?? '계정이 생성되었습니다.'}');
+        return (true, '${result['message'] ?? '계정이 생성되었습니다.'}');
       } else {
-        return (false, '❌ 생성 실패: ${result['message'] ?? '오류 발생'}');
+        return (false, '생성 실패: ${result['message'] ?? '오류 발생'}');
       }
     } catch (e) {
-      return (false, '🚨 네트워크 에러: $e');
+      return (false, '네트워크 에러: $e');
     }
   }
 
@@ -238,12 +238,12 @@ class TeacherStudentManagementController extends ChangeNotifier {
 
       if (response.statusCode == 200 && result['status'] == 'success') {
         await fetchStudents();
-        return (true, '✅ ${result['message'] ?? '학년이 지정되었습니다.'}');
+        return (true, '${result['message'] ?? '학년이 지정되었습니다.'}');
       } else {
-        return (false, '❌ 지정 실패: ${result['message'] ?? '오류 발생'}');
+        return (false, '지정 실패: ${result['message'] ?? '오류 발생'}');
       }
     } catch (e) {
-      return (false, '🚨 네트워크 에러: $e');
+      return (false, '네트워크 에러: $e');
     } finally {
       _isWorking = false;
       notifyListeners();
@@ -266,12 +266,12 @@ class TeacherStudentManagementController extends ChangeNotifier {
       if (response.statusCode == 200) {
         final resData = jsonDecode(utf8.decode(response.bodyBytes));
         await fetchStudents();
-        return (true, '✅ ${resData['message']}');
+        return (true, '${resData['message']}');
       } else {
-        return (false, '❌ 삭제 실패하였습니다.');
+        return (false, '삭제 실패하였습니다.');
       }
     } catch (e) {
-      return (false, '❌ 서버 에러 발생');
+      return (false, '서버 에러 발생');
     } finally {
       _isWorking = false;
       notifyListeners();

lib/main_client_app.dart

@@ -6,8 +6,11 @@ import 'package:flutter/material.dart';
 import 'package:firebase_core/firebase_core.dart';
 import 'firebase_options.dart';
 import 'config.dart';
+import 'function/session_store.dart';
 import 'pocket_watch_service.dart';
+import 'theme/app_palette.dart';
 import 'ui/login_screen.dart';
+import 'ui/main_dashboard.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -27,8 +30,72 @@ class SchoolAttendanceApp extends StatelessWidget {
     return MaterialApp(
       debugShowCheckedModeBanner: false,
       title: '$schoolName 학생 도우미',
-      theme: ThemeData(primarySwatch: Colors.indigo, useMaterial3: true),
-      home: const LoginScreen(), // 🚪 앱을 켜면 무조건 로그인 화면이 먼저 등장합니다.
+      theme: ThemeData(
+        useMaterial3: true,
+        scaffoldBackgroundColor: AppPalette.mist,
+        colorScheme:
+            ColorScheme.fromSeed(
+              seedColor: AppPalette.ink,
+              brightness: Brightness.light,
+            ).copyWith(
+              primary: AppPalette.ink,
+              onPrimary: AppPalette.paper,
+              secondary: AppPalette.ink,
+              onSecondary: AppPalette.paper,
+              surface: AppPalette.paper,
+              onSurface: AppPalette.ink,
+            ),
+      ),
+      home: const _StartupGate(), // 🚪 저장된 로그인이 있으면 대시보드로, 없으면 로그인 화면으로.
     );
   }
 }
+
+/// 🔐 "로그인 유지" 진입점. 기기에 저장된 세션이 있는지 확인하는 동안 잠깐 로딩을 보여주고,
+/// 있으면 로그인 화면 없이 바로 대시보드로, 없으면 로그인 화면으로 보낸다.
+class _StartupGate extends StatefulWidget {
+  const _StartupGate();
+
+  @override
+  State<_StartupGate> createState() => _StartupGateState();
+}
+
+class _StartupGateState extends State<_StartupGate> {
+  SavedSession? _session;
+  bool _checked = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _checkSession();
+  }
+
+  Future<void> _checkSession() async {
+    final session = await SessionStore.load();
+    if (!mounted) return;
+    setState(() {
+      _session = session;
+      _checked = true;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (!_checked) {
+      return Scaffold(
+        backgroundColor: AppPalette.mist,
+        body: const Center(child: CircularProgressIndicator()),
+      );
+    }
+    final session = _session;
+    if (session != null) {
+      return MainDashboard(
+        userId: session.userId,
+        userName: session.userName,
+        role: session.role,
+        isDeviceMatched: session.isDeviceMatched,
+      );
+    }
+    return const LoginScreen();
+  }
+}

lib/models/dashboard_tile_layout.dart

@@ -0,0 +1,62 @@
+// 🧩 대시보드 타일의 격자 위치/크기(1x1 ~ 4x4)를 표현하는 값 객체.
+// 전체 배치 캔버스는 가로 6칸 × 세로 4칸으로 고정한다.
+
+// 📱 [기능 보류] 데스크탑에서는 잘 나오지만, 폰처럼 화면이 작은 기기에서는
+// 6칸 고정 격자 때문에 타일이 너무 작아져 레이아웃이 깨진다.
+// 작은 화면 대응 방안을 마련하기 전까지 편집 기능을 임시로 꺼둔다.
+// (다시 켜려면 이 값만 true로 바꾸면 됨 — 관련 코드는 그대로 남겨둠)
+const bool kTileEditingEnabled = false;
+
+const int kGridCols = 6;
+const int kGridRows = 4;
+const int kMinTileSize = 1;
+const int kMaxTileSize = 4;
+
+class TileRect {
+  final int x;
+  final int y;
+  final int w;
+  final int h;
+
+  const TileRect({
+    required this.x,
+    required this.y,
+    required this.w,
+    required this.h,
+  });
+
+  factory TileRect.fromJson(Map<String, dynamic> json) => TileRect(
+    x: (json['x'] as num).toInt(),
+    y: (json['y'] as num).toInt(),
+    w: (json['w'] as num).toInt(),
+    h: (json['h'] as num).toInt(),
+  );
+
+  Map<String, dynamic> toJson(String id) => {
+    'id': id,
+    'x': x,
+    'y': y,
+    'w': w,
+    'h': h,
+  };
+
+  TileRect copyWith({int? x, int? y, int? w, int? h}) =>
+      TileRect(x: x ?? this.x, y: y ?? this.y, w: w ?? this.w, h: h ?? this.h);
+
+  bool overlaps(TileRect other) {
+    return x < other.x + other.w &&
+        x + w > other.x &&
+        y < other.y + other.h &&
+        y + h > other.y;
+  }
+
+  bool get isWithinCanvas =>
+      x >= 0 &&
+      y >= 0 &&
+      x + w <= kGridCols &&
+      y + h <= kGridRows &&
+      w >= kMinTileSize &&
+      h >= kMinTileSize &&
+      w <= kMaxTileSize &&
+      h <= kMaxTileSize;
+}

lib/pocket_watch_service.dart

@@ -44,7 +44,7 @@ Future<void> initializePocketWatchService() async {
       autoStartOnBoot: false,
       isForegroundMode: true,
       notificationChannelId: pocketWatchNotificationChannelId,
-      initialNotificationTitle: '🛡️ 주머니 감시 대기 중',
+      initialNotificationTitle: '주머니 감시 대기 중',
       initialNotificationContent: '출석 태깅을 기다리는 중입니다.',
       foregroundServiceNotificationId: pocketWatchNotificationId,
       foregroundServiceTypes: [AndroidForegroundType.specialUse],
@@ -88,7 +88,7 @@ void onPocketWatchServiceStart(ServiceInstance service) {
   Future<void> reportViolation() async {
     // 진동 3연타로 강하게 경고 (백그라운드 서비스에서는 HapticFeedback이 아닌 vibration 패키지를 써야 동작함)
     Vibration.vibrate(pattern: [0, 400, 150, 400, 150, 400]);
-    updateNotification("🚨 무단 반출 감지!", "[$pocketNumber] 주머니에서 폰이 감지되지 않습니다.");
+    updateNotification("무단 반출 감지!", "[$pocketNumber] 주머니에서 폰이 감지되지 않습니다.");
     service.invoke('violation_detected', {
       "pocketNumber": pocketNumber,
       "timestamp": DateTime.now().toIso8601String(),
@@ -128,7 +128,7 @@ void onPocketWatchServiceStart(ServiceInstance service) {
     }
 
     if (isPermitted) {
-      updateNotification("✅ 폰 회수 완료", "[$pocketNumber] 주머니에서 정상적으로 회수되었습니다.");
+      updateNotification("폰 회수 완료", "[$pocketNumber] 주머니에서 정상적으로 회수되었습니다.");
       service.invoke('checked_out', {"pocketNumber": pocketNumber});
       service.stopSelf();
     } else {
@@ -145,7 +145,7 @@ void onPocketWatchServiceStart(ServiceInstance service) {
         baselineLux =
             calibrationSamples.reduce((a, b) => a + b) ~/
             calibrationSamples.length;
-        updateNotification("🛡️ 감시 중", "[$pocketNumber] 폰이 주머니 안에 있는지 감시 중");
+        updateNotification("감시 중", "[$pocketNumber] 폰이 주머니 안에 있는지 감시 중");
       }
       return;
     }
@@ -163,22 +163,22 @@ void onPocketWatchServiceStart(ServiceInstance service) {
     baselineLux = null;
     violated = false;
 
-    updateNotification("📥 주머니에 넣는 중...", "잠시 후 감시가 시작됩니다.");
+    updateNotification("주머니에 넣는 중...", "잠시 후 감시가 시작됩니다.");
 
     await Future.delayed(_placePhoneDelay);
 
-    updateNotification("🔎 밝기 측정 중...", "주머니 속 밝기를 기준값으로 설정하는 중입니다.");
+    updateNotification("밝기 측정 중...", "주머니 속 밝기를 기준값으로 설정하는 중입니다.");
 
     try {
       await Light().requestAuthorization();
       lightSub = Light().lightSensorStream.listen(
         onLightReading,
         onError: (Object error) {
-          updateNotification("❌ 조도 센서 오류", "$error");
+          updateNotification("조도 센서 오류", "$error");
         },
       );
     } catch (e) {
-      updateNotification("❌ 조도 센서 시작 실패", "$e");
+      updateNotification("조도 센서 시작 실패", "$e");
     }
   }
 

lib/screens/change_password_screen.dart

@@ -3,6 +3,7 @@ import 'dart:convert';
 import 'package:flutter/material.dart';
 import 'package:http/http.dart' as http;
 import '../config.dart';
+import '../theme/app_palette.dart';
 import '../ui/login_screen.dart';
 
 // 💡 main.dart 파일의 최하단(다른 클래스 중괄호 밖)에 붙여넣으세요.
@@ -22,7 +23,7 @@ class _ChangePasswordScreenState extends State<ChangePasswordScreen> {
     String newPw = _pwController.text.trim();
     if (newPw.isEmpty || newPw == "1234") {
       ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(content: Text('⚠️ 초기 비밀번호와 다른 안전한 비밀번호를 입력하세요.')),
+        const SnackBar(content: Text('초기 비밀번호와 다른 안전한 비밀번호를 입력하세요.')),
       );
       return;
     }
@@ -38,7 +39,7 @@ class _ChangePasswordScreenState extends State<ChangePasswordScreen> {
       final res = jsonDecode(response.body);
       if (response.statusCode == 200 && res['status'] == 'success') {
         ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(content: Text('🔒 비밀번호 변경 완료! 다시 로그인해 주세요.')),
+          const SnackBar(content: Text('비밀번호 변경 완료! 다시 로그인해 주세요.')),
         );
         // 비밀번호를 바꿨으니 다시 로그인 화면으로 강제 이동
         Navigator.pushReplacement(
@@ -49,7 +50,7 @@ class _ChangePasswordScreenState extends State<ChangePasswordScreen> {
     } catch (e) {
       ScaffoldMessenger.of(
         context,
-      ).showSnackBar(const SnackBar(content: Text('❌ 통신 실패')));
+      ).showSnackBar(const SnackBar(content: Text('통신 실패')));
     } finally {
       setState(() => _isLoading = false);
     }
@@ -58,6 +59,7 @@ class _ChangePasswordScreenState extends State<ChangePasswordScreen> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
+      backgroundColor: AppPalette.mist,
       body: Padding(
         padding: const EdgeInsets.all(32.0),
         child: Column(
@@ -65,7 +67,7 @@ class _ChangePasswordScreenState extends State<ChangePasswordScreen> {
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
             const Text(
-              '🔒 보안을 위해\n비밀번호를 변경해 주세요',
+              '보안을 위해\n비밀번호를 변경해 주세요',
               style: TextStyle(
                 fontSize: 24,
                 fontWeight: FontWeight.bold,
@@ -92,8 +94,8 @@ class _ChangePasswordScreenState extends State<ChangePasswordScreen> {
               height: 50,
               child: ElevatedButton(
                 style: ElevatedButton.styleFrom(
-                  backgroundColor: Colors.indigo,
-                  foregroundColor: Colors.white,
+                  backgroundColor: AppPalette.ink,
+                  foregroundColor: AppPalette.paper,
                 ),
                 onPressed: _isLoading ? null : _updatePassword,
                 child: _isLoading

lib/theme/app_palette.dart

@@ -0,0 +1,14 @@
+// 🎨 앱 전역 무채색 팔레트 (coolors.co: 1c1c1c-daddd8-ecebe4-eef0f2-fafaff).
+// 배경/카드/배너 같은 구조적 색상은 전부 이 5색으로 통일한다.
+// 삭제/위반/거절처럼 사용자가 즉시 알아채야 하는 경고성 색상(빨강 등)만 예외로 유지한다.
+import 'package:flutter/material.dart';
+
+class AppPalette {
+  AppPalette._();
+
+  static const Color ink = Color(0xFF1C1C1C); // 가장 어두운 톤 — 배너/주요 텍스트/버튼
+  static const Color sage = Color(0xFFDADDD8); // 보더/구분선/보조 표면
+  static const Color linen = Color(0xFFECEBE4); // 은은한 카드/배지 배경
+  static const Color mist = Color(0xFFEEF0F2); // 페이지 배경
+  static const Color paper = Color(0xFFFAFAFF); // 카드 표면(거의 흰색)
+}

lib/ui/admin_dashboard.dart

@@ -2,6 +2,7 @@
 // 서버 통신/상태는 lib/function/admin_controller.dart가 담당한다.
 import 'package:flutter/material.dart';
 import '../function/admin_controller.dart';
+import '../theme/app_palette.dart';
 import 'login_screen.dart';
 
 // ==========================================
@@ -37,7 +38,7 @@ class _AdminDashboardState extends State<AdminDashboard> {
       builder: (BuildContext dialogContext) {
         return AlertDialog(
           title: const Text(
-            '⚠️ DB 초기화 경고',
+            'DB 초기화 경고',
             style: TextStyle(color: Colors.red, fontWeight: FontWeight.bold),
           ),
           content: const Text(
@@ -71,10 +72,11 @@ class _AdminDashboardState extends State<AdminDashboard> {
       listenable: _controller,
       builder: (context, _) {
         return Scaffold(
+          backgroundColor: AppPalette.mist,
           appBar: AppBar(
-            title: const Text('🛠️ 관리자 시스템'),
-            backgroundColor: Colors.orange,
-            foregroundColor: Colors.white,
+            title: const Text('관리자 시스템'),
+            backgroundColor: AppPalette.ink,
+            foregroundColor: AppPalette.paper,
             actions: [
               IconButton(
                 icon: const Icon(Icons.logout),
@@ -94,7 +96,7 @@ class _AdminDashboardState extends State<AdminDashboard> {
                   const Icon(
                     Icons.admin_panel_settings,
                     size: 100,
-                    color: Colors.orange,
+                    color: AppPalette.ink,
                   ),
                   const SizedBox(height: 20),
                   const Text(

lib/ui/app_notice.dart

@@ -0,0 +1,162 @@
+// 🔔 스낵바 대신 쓰는 알약(pill) 모양 알림. 기능 타일을 누를 때 뜨는
+// "OO로 이동합니다" 같은 짧은 안내용. 푸시 알림(FCM)과는 무관 — 그건 그대로 동작한다.
+// 웹에서는 왼쪽 위(알림창 자리)에, 폰 앱에서는 기존 스낵바처럼 아래쪽에 뜬다.
+import 'package:flutter/foundation.dart' show kIsWeb;
+import 'package:flutter/material.dart';
+import '../theme/app_palette.dart';
+
+class AppNotice {
+  static final List<_QueuedNotice> _queue = [];
+  static bool _showing = false;
+
+  static void show(BuildContext context, String message, {IconData? icon}) {
+    _queue.add(_QueuedNotice(context, message, icon));
+    _tryShowNext();
+  }
+
+  static void _tryShowNext() {
+    if (_showing || _queue.isEmpty) return;
+    final next = _queue.removeAt(0);
+    if (!next.context.mounted) {
+      _tryShowNext();
+      return;
+    }
+    _showing = true;
+    final overlay = Overlay.of(next.context);
+    late OverlayEntry entry;
+    entry = OverlayEntry(
+      builder: (context) => _NoticeBanner(
+        message: next.message,
+        icon: next.icon,
+        onDone: () {
+          entry.remove();
+          _showing = false;
+          _tryShowNext();
+        },
+      ),
+    );
+    overlay.insert(entry);
+  }
+}
+
+class _QueuedNotice {
+  final BuildContext context;
+  final String message;
+  final IconData? icon;
+  _QueuedNotice(this.context, this.message, this.icon);
+}
+
+class _NoticeBanner extends StatefulWidget {
+  final String message;
+  final IconData? icon;
+  final VoidCallback onDone;
+
+  const _NoticeBanner({
+    required this.message,
+    required this.icon,
+    required this.onDone,
+  });
+
+  @override
+  State<_NoticeBanner> createState() => _NoticeBannerState();
+}
+
+class _NoticeBannerState extends State<_NoticeBanner>
+    with SingleTickerProviderStateMixin {
+  late final AnimationController _controller;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = AnimationController(
+      vsync: this,
+      duration: const Duration(milliseconds: 220),
+      reverseDuration: const Duration(milliseconds: 180),
+    );
+    _controller.forward();
+    Future.delayed(const Duration(milliseconds: 2600), () async {
+      if (!mounted) return;
+      await _controller.reverse();
+      widget.onDone();
+    });
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final curved = CurvedAnimation(
+      parent: _controller,
+      curve: Curves.easeOutCubic,
+      reverseCurve: Curves.easeInCubic,
+    );
+    final media = MediaQuery.of(context);
+
+    final pill = Material(
+      color: Colors.transparent,
+      child: Container(
+        constraints: const BoxConstraints(maxWidth: 360),
+        padding: const EdgeInsets.symmetric(horizontal: 18, vertical: 14),
+        decoration: BoxDecoration(
+          color: AppPalette.ink,
+          borderRadius: BorderRadius.circular(999),
+          boxShadow: [
+            BoxShadow(
+              color: Colors.black.withValues(alpha: 0.25),
+              blurRadius: 16,
+              offset: const Offset(0, 6),
+            ),
+          ],
+        ),
+        child: Row(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            if (widget.icon != null) ...[
+              Icon(widget.icon, color: AppPalette.paper, size: 18),
+              const SizedBox(width: 8),
+            ],
+            Flexible(
+              child: Text(
+                widget.message,
+                style: const TextStyle(
+                  color: AppPalette.paper,
+                  fontSize: 13.5,
+                  fontWeight: FontWeight.w600,
+                ),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+
+    final animatedPill = FadeTransition(
+      opacity: curved,
+      child: SlideTransition(
+        position: Tween<Offset>(
+          begin: kIsWeb ? const Offset(0, -0.3) : const Offset(0, 0.3),
+          end: Offset.zero,
+        ).animate(curved),
+        child: pill,
+      ),
+    );
+
+    if (kIsWeb) {
+      return Positioned(
+        top: media.padding.top + 16,
+        left: 16,
+        child: IgnorePointer(child: animatedPill),
+      );
+    }
+    return Positioned(
+      left: 16,
+      right: 16,
+      bottom: media.padding.bottom + 24,
+      child: IgnorePointer(child: Center(child: animatedPill)),
+    );
+  }
+}

lib/ui/dashboard_settings_page.dart

@@ -0,0 +1,60 @@
+// ⚙️ 대시보드 설정 화면 (UI 전용). 지금은 "UI 편집" 진입점 하나만 있다.
+// "UI 편집"을 누르면 이 화면을 pop('edit_ui')로 닫고, 대시보드가 그 결과를 받아 편집 모드로 들어간다.
+import 'package:flutter/material.dart';
+import '../models/dashboard_tile_layout.dart';
+import '../theme/app_palette.dart';
+
+class DashboardSettingsPage extends StatelessWidget {
+  const DashboardSettingsPage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: AppPalette.mist,
+      appBar: AppBar(
+        title: const Text('설정'),
+        backgroundColor: AppPalette.ink,
+        foregroundColor: AppPalette.paper,
+        elevation: 0,
+      ),
+      body: ListView(
+        padding: const EdgeInsets.all(16),
+        children: [
+          Container(
+            decoration: BoxDecoration(
+              color: AppPalette.paper,
+              borderRadius: BorderRadius.circular(16),
+              border: Border.all(color: AppPalette.sage),
+            ),
+            child: ListTile(
+              shape: RoundedRectangleBorder(
+                borderRadius: BorderRadius.circular(16),
+              ),
+              enabled: kTileEditingEnabled,
+              leading: const Icon(
+                Icons.grid_view_rounded,
+                color: AppPalette.ink,
+              ),
+              title: const Text(
+                'UI 편집',
+                style: TextStyle(fontWeight: FontWeight.bold),
+              ),
+              // 📱 [기능 보류] 작은 화면에서 레이아웃이 깨지는 문제로 잠시 막아둠.
+              subtitle: Text(
+                kTileEditingEnabled
+                    ? '타일을 드래그해서 옮기고 크기를 바꿀 수 있어요.'
+                    : '작은 화면 대응을 준비 중이라 잠시 사용할 수 없어요.',
+              ),
+              trailing: kTileEditingEnabled
+                  ? const Icon(Icons.chevron_right_rounded)
+                  : null,
+              onTap: kTileEditingEnabled
+                  ? () => Navigator.pop(context, 'edit_ui')
+                  : null,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}

lib/ui/device_checkout_ledger_page.dart

@@ -0,0 +1,319 @@
+// 📋 선생님용 "스마트기기 반출 대장" 화면 (UI 전용). 오늘 신청된 반출 요청을 보여주고 승인/거절한다.
+// 서버 통신/상태는 lib/function/device_checkout_ledger_controller.dart가 담당한다.
+import 'package:flutter/material.dart';
+import '../function/device_checkout_ledger_controller.dart';
+import '../theme/app_palette.dart';
+
+class DeviceCheckoutLedgerPage extends StatefulWidget {
+  final String? teacherId;
+  final String? teacherName;
+
+  const DeviceCheckoutLedgerPage({super.key, this.teacherId, this.teacherName});
+
+  @override
+  State<DeviceCheckoutLedgerPage> createState() =>
+      _DeviceCheckoutLedgerPageState();
+}
+
+class _DeviceCheckoutLedgerPageState extends State<DeviceCheckoutLedgerPage> {
+  final DeviceCheckoutLedgerController _controller =
+      DeviceCheckoutLedgerController();
+
+  @override
+  void initState() {
+    super.initState();
+    _controller.init();
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
+  Future<void> _approve(int id) async {
+    final (_, message) = await _controller.approve(
+      id,
+      teacherId: widget.teacherId ?? '간편인증',
+      teacherName: widget.teacherName ?? '간편인증 선생',
+    );
+    if (!mounted) return;
+    ScaffoldMessenger.of(
+      context,
+    ).showSnackBar(SnackBar(content: Text(message)));
+  }
+
+  Future<void> _reject(int id) async {
+    final (_, message) = await _controller.reject(id);
+    if (!mounted) return;
+    ScaffoldMessenger.of(
+      context,
+    ).showSnackBar(SnackBar(content: Text(message)));
+  }
+
+  // 🖐️ [하드웨어 자동 감지 전까지 임시] 기기를 실제로 돌려받았을 때 누르는 버튼.
+  Future<void> _confirmReturn(int id) async {
+    final (_, message) = await _controller.confirmReturn(id);
+    if (!mounted) return;
+    ScaffoldMessenger.of(
+      context,
+    ).showSnackBar(SnackBar(content: Text(message)));
+  }
+
+  ({Color color, String label}) _statusInfo(String status) {
+    switch (status) {
+      case 'PENDING':
+        return (color: Colors.orange, label: '대기중');
+      case 'APPROVED':
+        return (color: Colors.blue, label: '승인됨');
+      case 'RETURNED':
+        return (color: Colors.grey, label: '반납완료');
+      case 'REJECTED':
+        return (color: Colors.red, label: '거절됨');
+      default:
+        return (color: Colors.grey, label: status);
+    }
+  }
+
+  String _timeRange(String start, String end) {
+    // "YYYY-MM-DD HH:MM:SS" -> "HH:MM"
+    String hm(String full) => full.length >= 16 ? full.substring(11, 16) : full;
+    return '${hm(start)} ~ ${hm(end)}';
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return ListenableBuilder(
+      listenable: _controller,
+      builder: (context, _) {
+        final requests = _controller.requests;
+        final pendingCount = requests
+            .where((r) => r['status'] == 'PENDING')
+            .length;
+
+        return Scaffold(
+          backgroundColor: AppPalette.mist,
+          appBar: AppBar(
+            title: const Text(
+              '스마트기기 반출 대장',
+              style: TextStyle(fontWeight: FontWeight.bold),
+            ),
+            backgroundColor: AppPalette.ink,
+            foregroundColor: Colors.white,
+            elevation: 0,
+            actions: [
+              IconButton(
+                icon: const Icon(Icons.refresh_rounded),
+                onPressed: _controller.fetchAll,
+                tooltip: '새로고침',
+              ),
+            ],
+          ),
+          body: _controller.isLoading
+              ? const Center(child: CircularProgressIndicator())
+              : Column(
+                  children: [
+                    if (pendingCount > 0)
+                      Container(
+                        width: double.infinity,
+                        margin: const EdgeInsets.all(16),
+                        padding: const EdgeInsets.symmetric(
+                          horizontal: 16,
+                          vertical: 10,
+                        ),
+                        decoration: BoxDecoration(
+                          color: Colors.orange[100],
+                          borderRadius: BorderRadius.circular(12),
+                          border: Border.all(color: Colors.orange[400]!),
+                        ),
+                        child: Text(
+                          '승인 대기 중인 요청이 $pendingCount건 있습니다.',
+                          style: TextStyle(
+                            color: Colors.orange[900],
+                            fontWeight: FontWeight.bold,
+                          ),
+                        ),
+                      ),
+                    Expanded(
+                      child: requests.isEmpty
+                          ? const Center(
+                              child: Text(
+                                '오늘 신청된 반출 요청이 없습니다.',
+                                style: TextStyle(color: Colors.grey),
+                              ),
+                            )
+                          : ListView.builder(
+                              padding: const EdgeInsets.symmetric(
+                                horizontal: 16,
+                                vertical: 8,
+                              ),
+                              itemCount: requests.length,
+                              itemBuilder: (context, index) {
+                                final r = requests[index];
+                                final String status = r['status'];
+                                final info = _statusInfo(status);
+                                final bool isPending = status == 'PENDING';
+
+                                return Card(
+                                  elevation: 0,
+                                  color: AppPalette.paper,
+                                  margin: const EdgeInsets.only(bottom: 10),
+                                  shape: RoundedRectangleBorder(
+                                    borderRadius: BorderRadius.circular(16),
+                                    side: isPending
+                                        ? BorderSide(color: Colors.orange[300]!)
+                                        : BorderSide(color: AppPalette.sage),
+                                  ),
+                                  child: Padding(
+                                    padding: const EdgeInsets.all(16),
+                                    child: Column(
+                                      crossAxisAlignment:
+                                          CrossAxisAlignment.start,
+                                      children: [
+                                        Row(
+                                          children: [
+                                            Expanded(
+                                              child: Text(
+                                                '${r['studentName']} (${r['studentId']})',
+                                                style: const TextStyle(
+                                                  fontWeight: FontWeight.bold,
+                                                  fontSize: 15,
+                                                ),
+                                              ),
+                                            ),
+                                            Container(
+                                              padding:
+                                                  const EdgeInsets.symmetric(
+                                                    horizontal: 10,
+                                                    vertical: 4,
+                                                  ),
+                                              decoration: BoxDecoration(
+                                                color: info.color.withValues(
+                                                  alpha: 0.12,
+                                                ),
+                                                borderRadius:
+                                                    BorderRadius.circular(20),
+                                              ),
+                                              child: Text(
+                                                info.label,
+                                                style: TextStyle(
+                                                  color: info.color,
+                                                  fontWeight: FontWeight.bold,
+                                                  fontSize: 12,
+                                                ),
+                                              ),
+                                            ),
+                                          ],
+                                        ),
+                                        const SizedBox(height: 6),
+                                        Text(
+                                          _timeRange(
+                                            r['requestedStart'],
+                                            r['requestedEnd'],
+                                          ),
+                                          style: TextStyle(
+                                            color: Colors.grey[700],
+                                            fontSize: 13,
+                                          ),
+                                        ),
+                                        const SizedBox(height: 2),
+                                        Text(
+                                          r['purpose'],
+                                          style: TextStyle(
+                                            color: Colors.grey[700],
+                                            fontSize: 13,
+                                          ),
+                                        ),
+                                        if (status == 'APPROVED' &&
+                                            r['approvedByTeacherName'] !=
+                                                null) ...[
+                                          const SizedBox(height: 2),
+                                          Text(
+                                            '${r['approvedByTeacherName']} 선생님이 허용했습니다',
+                                            style: TextStyle(
+                                              color: Colors.blue[700],
+                                              fontSize: 12,
+                                              fontWeight: FontWeight.w600,
+                                            ),
+                                          ),
+                                        ],
+                                        if (isPending) ...[
+                                          const SizedBox(height: 12),
+                                          Row(
+                                            children: [
+                                              Expanded(
+                                                child: OutlinedButton(
+                                                  onPressed:
+                                                      _controller.isWorking
+                                                      ? null
+                                                      : () => _reject(r['id']),
+                                                  style:
+                                                      OutlinedButton.styleFrom(
+                                                        foregroundColor:
+                                                            Colors.red,
+                                                        side: const BorderSide(
+                                                          color: Colors.red,
+                                                        ),
+                                                      ),
+                                                  child: const Text('거절'),
+                                                ),
+                                              ),
+                                              const SizedBox(width: 8),
+                                              Expanded(
+                                                child: ElevatedButton(
+                                                  onPressed:
+                                                      _controller.isWorking
+                                                      ? null
+                                                      : () => _approve(r['id']),
+                                                  style:
+                                                      ElevatedButton.styleFrom(
+                                                        backgroundColor:
+                                                            AppPalette.ink,
+                                                        foregroundColor:
+                                                            AppPalette.paper,
+                                                      ),
+                                                  child: const Text('승인'),
+                                                ),
+                                              ),
+                                            ],
+                                          ),
+                                        ],
+                                        if (status == 'APPROVED') ...[
+                                          const SizedBox(height: 12),
+                                          SizedBox(
+                                            width: double.infinity,
+                                            child: OutlinedButton.icon(
+                                              onPressed: _controller.isWorking
+                                                  ? null
+                                                  : () =>
+                                                        _confirmReturn(r['id']),
+                                              style: OutlinedButton.styleFrom(
+                                                foregroundColor:
+                                                    Colors.grey[800],
+                                                side: BorderSide(
+                                                  color: Colors.grey[400]!,
+                                                ),
+                                              ),
+                                              icon: const Icon(
+                                                Icons
+                                                    .assignment_turned_in_outlined,
+                                                size: 18,
+                                              ),
+                                              label: const Text('기기 반납 확인'),
+                                            ),
+                                          ),
+                                        ],
+                                      ],
+                                    ),
+                                  ),
+                                );
+                              },
+                            ),
+                    ),
+                  ],
+                ),
+        );
+      },
+    );
+  }
+}

lib/ui/device_checkout_request_screen.dart

@@ -0,0 +1,194 @@
+// 📱 스마트기기(패드) 반출 신청 화면 (UI 전용). 시작~종료 시각과 사용 목적을 입력받는다.
+// 서버 통신/상태는 lib/function/device_checkout_controller.dart가 담당한다.
+import 'package:flutter/material.dart';
+import '../function/device_checkout_controller.dart';
+import '../theme/app_palette.dart';
+
+class DeviceCheckoutRequestScreen extends StatefulWidget {
+  final String studentId;
+  final String studentName;
+
+  const DeviceCheckoutRequestScreen({
+    super.key,
+    required this.studentId,
+    required this.studentName,
+  });
+
+  @override
+  State<DeviceCheckoutRequestScreen> createState() =>
+      _DeviceCheckoutRequestScreenState();
+}
+
+class _DeviceCheckoutRequestScreenState
+    extends State<DeviceCheckoutRequestScreen> {
+  final DeviceCheckoutController _controller = DeviceCheckoutController();
+  final TextEditingController _purposeController = TextEditingController();
+  TimeOfDay? _startTime;
+  TimeOfDay? _endTime;
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    _purposeController.dispose();
+    super.dispose();
+  }
+
+  String _formatTime(TimeOfDay time) =>
+      '${time.hour.toString().padLeft(2, '0')}:${time.minute.toString().padLeft(2, '0')}';
+
+  Future<void> _pickStartTime() async {
+    final picked = await showTimePicker(
+      context: context,
+      initialTime: _startTime ?? TimeOfDay.now(),
+      helpText: '사용 시작 시각',
+    );
+    if (picked != null) setState(() => _startTime = picked);
+  }
+
+  Future<void> _pickEndTime() async {
+    final picked = await showTimePicker(
+      context: context,
+      initialTime: _endTime ?? TimeOfDay.now(),
+      helpText: '사용 종료 시각',
+    );
+    if (picked != null) setState(() => _endTime = picked);
+  }
+
+  Future<void> _submit() async {
+    final purpose = _purposeController.text.trim();
+    if (_startTime == null || _endTime == null || purpose.isEmpty) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('시작/종료 시각과 사용 목적을 모두 입력해주세요.')),
+      );
+      return;
+    }
+
+    final (success, message) = await _controller.submitRequest(
+      studentId: widget.studentId,
+      studentName: widget.studentName,
+      purpose: purpose,
+      startTime: _formatTime(_startTime!),
+      endTime: _formatTime(_endTime!),
+    );
+    if (!mounted) return;
+    ScaffoldMessenger.of(
+      context,
+    ).showSnackBar(SnackBar(content: Text(message)));
+    if (success) Navigator.pop(context);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return ListenableBuilder(
+      listenable: _controller,
+      builder: (context, _) {
+        return Scaffold(
+          backgroundColor: AppPalette.mist,
+          appBar: AppBar(
+            title: const Text(
+              '스마트기기 반출 신청',
+              style: TextStyle(fontWeight: FontWeight.bold),
+            ),
+            backgroundColor: AppPalette.ink,
+            foregroundColor: Colors.white,
+            elevation: 0,
+          ),
+          body: SingleChildScrollView(
+            padding: const EdgeInsets.all(24.0),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                const Text(
+                  '패드는 NFC 태그가 안 되니, 사용 시간과 목적을 적어 신청하면\n'
+                  '선생님이 확인하고 승인해줍니다. 승인되면 반납 바구니에서 꺼내 쓰세요.',
+                  style: TextStyle(
+                    color: Colors.black54,
+                    fontSize: 13,
+                    height: 1.4,
+                  ),
+                ),
+                const SizedBox(height: 24),
+                Container(
+                  padding: const EdgeInsets.all(20),
+                  decoration: BoxDecoration(
+                    color: AppPalette.paper,
+                    borderRadius: BorderRadius.circular(24),
+                    border: Border.all(color: AppPalette.sage),
+                  ),
+                  child: Column(
+                    children: [
+                      Row(
+                        children: [
+                          Expanded(
+                            child: OutlinedButton.icon(
+                              onPressed: _pickStartTime,
+                              icon: const Icon(Icons.play_arrow_rounded),
+                              label: Text(
+                                _startTime == null
+                                    ? '시작 시각'
+                                    : _formatTime(_startTime!),
+                              ),
+                            ),
+                          ),
+                          const SizedBox(width: 12),
+                          Expanded(
+                            child: OutlinedButton.icon(
+                              onPressed: _pickEndTime,
+                              icon: const Icon(Icons.stop_rounded),
+                              label: Text(
+                                _endTime == null
+                                    ? '종료 시각'
+                                    : _formatTime(_endTime!),
+                              ),
+                            ),
+                          ),
+                        ],
+                      ),
+                      const SizedBox(height: 16),
+                      TextField(
+                        controller: _purposeController,
+                        maxLines: 3,
+                        decoration: const InputDecoration(
+                          labelText: '사용 목적',
+                          hintText: '예: 수행평가 자료조사',
+                          alignLabelWithHint: true,
+                          border: OutlineInputBorder(),
+                        ),
+                      ),
+                      const SizedBox(height: 20),
+                      SizedBox(
+                        width: double.infinity,
+                        height: 50,
+                        child: ElevatedButton(
+                          onPressed: _controller.isSubmitting ? null : _submit,
+                          style: ElevatedButton.styleFrom(
+                            backgroundColor: AppPalette.ink,
+                            foregroundColor: AppPalette.paper,
+                            shape: RoundedRectangleBorder(
+                              borderRadius: BorderRadius.circular(12),
+                            ),
+                          ),
+                          child: _controller.isSubmitting
+                              ? const CircularProgressIndicator(
+                                  color: Colors.white,
+                                )
+                              : const Text(
+                                  '반출 신청하기',
+                                  style: TextStyle(
+                                    fontWeight: FontWeight.bold,
+                                    fontSize: 15,
+                                  ),
+                                ),
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+              ],
+            ),
+          ),
+        );
+      },
+    );
+  }
+}

lib/ui/launchpad_transition.dart

@@ -0,0 +1,115 @@
+// 🚀 맥북 런치패드처럼 "앞에서 확대되며 나타나고, 뒤는 블러 처리되는" 전환 효과.
+// 기존의 좌우 슬라이드 전환을 대체한다. 두 가지 쓰임새가 있다:
+// 1) launchpadPageRoute  — 전체 화면 이동(다른 기능 타일 진입)용. 전환 중에만 블러가 보이고,
+//    화면이 다 뜨면 원래 화면(대시보드)은 완전히 가려진다.
+// 2) showLaunchpadMenu   — 설정/로그아웃 같은 작은 메뉴 오버레이용. 메뉴가 떠 있는 동안
+//    뒤에 있는 대시보드가 계속 뿌옇게 보인다. 바깥을 탭하면 닫힌다.
+import 'dart:ui';
+import 'package:flutter/material.dart';
+
+class LaunchpadPageRoute<T> extends PageRouteBuilder<T> {
+  LaunchpadPageRoute({required WidgetBuilder builder})
+    : super(
+        transitionDuration: const Duration(milliseconds: 320),
+        reverseTransitionDuration: const Duration(milliseconds: 240),
+        pageBuilder: (context, animation, secondaryAnimation) =>
+            builder(context),
+        transitionsBuilder: (context, animation, secondaryAnimation, child) {
+          final curved = CurvedAnimation(
+            parent: animation,
+            curve: Curves.easeOutCubic,
+            reverseCurve: Curves.easeInCubic,
+          );
+          return AnimatedBuilder(
+            animation: curved,
+            child: child,
+            builder: (context, child) {
+              final t = curved.value;
+              return Stack(
+                children: [
+                  // 뒤에 있던 화면(대시보드)을 전환하는 동안만 뿌옇게 보여준다.
+                  Positioned.fill(
+                    child: IgnorePointer(
+                      child: BackdropFilter(
+                        filter: ImageFilter.blur(
+                          sigmaX: 22 * t,
+                          sigmaY: 22 * t,
+                        ),
+                        child: Container(
+                          color: Colors.black.withValues(alpha: 0.12 * t),
+                        ),
+                      ),
+                    ),
+                  ),
+                  Opacity(
+                    opacity: t,
+                    child: Transform.scale(
+                      scale: 0.94 + 0.06 * t,
+                      child: child,
+                    ),
+                  ),
+                ],
+              );
+            },
+          );
+        },
+      );
+}
+
+/// 화면 전체 이동에 런치패드 전환 효과를 적용한다. MaterialPageRoute 대신 이걸 쓰면 됨.
+Future<T?> pushLaunchpad<T>(BuildContext context, WidgetBuilder builder) {
+  return Navigator.push<T>(context, LaunchpadPageRoute<T>(builder: builder));
+}
+
+/// 설정/로그아웃 같은 작은 메뉴를 런치패드 스타일(확대+페이드, 배경은 계속 블러 유지)로 띄운다.
+/// 바깥을 탭하면 닫힌다. builder는 화면 전체를 채우는 Align 등으로 메뉴 위치를 직접 잡아야 한다.
+Future<T?> showLaunchpadMenu<T>({
+  required BuildContext context,
+  required WidgetBuilder builder,
+}) {
+  return showGeneralDialog<T>(
+    context: context,
+    barrierDismissible: true,
+    barrierLabel: 'menu',
+    barrierColor: Colors.transparent,
+    transitionDuration: const Duration(milliseconds: 260),
+    pageBuilder: (context, animation, secondaryAnimation) => builder(context),
+    transitionBuilder: (context, animation, secondaryAnimation, child) {
+      final curved = CurvedAnimation(
+        parent: animation,
+        curve: Curves.easeOutCubic,
+        reverseCurve: Curves.easeInCubic,
+      );
+      return AnimatedBuilder(
+        animation: curved,
+        child: child,
+        builder: (context, child) {
+          final t = curved.value;
+          return Stack(
+            children: [
+              // 메뉴가 떠 있는 동안 계속 뿌옇게 — 기능 화면이랑 헷갈리지 않게 진하게.
+              Positioned.fill(
+                child: IgnorePointer(
+                  child: BackdropFilter(
+                    filter: ImageFilter.blur(sigmaX: 32 * t, sigmaY: 32 * t),
+                    child: Container(
+                      color: Colors.black.withValues(alpha: 0.28 * t),
+                    ),
+                  ),
+                ),
+              ),
+              Opacity(
+                opacity: t,
+                child: Transform.scale(
+                  alignment: Alignment.topRight,
+                  scale: 0.85 + 0.15 * t,
+                  child: child,
+                ),
+              ),
+            ],
+          );
+        },
+      );
+    },
+  );
+}

lib/ui/login_screen.dart

@@ -3,9 +3,9 @@
 import 'package:flutter/material.dart';
 import '../config.dart' show schoolName;
 import '../function/login_controller.dart';
-import 'student_dashboard.dart';
-import 'teacher_dashboard.dart';
-import 'admin_dashboard.dart';
+import '../function/session_store.dart';
+import '../theme/app_palette.dart';
+import 'main_dashboard.dart';
 import 'teacher_register_screen.dart';
 
 // -------------------------------------------------------------
@@ -23,6 +23,7 @@ class _LoginScreenState extends State<LoginScreen> {
   final LoginController _controller = LoginController();
   final TextEditingController _idController = TextEditingController();
   final TextEditingController _pwController = TextEditingController();
+  bool _keepLoggedIn = true;
 
   @override
   void dispose() {
@@ -44,15 +45,29 @@ class _LoginScreenState extends State<LoginScreen> {
         _showErrorDialog(result.errorMessage!);
         break;
       case LoginOutcome.masterSuccess:
-        ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(content: Text('👑 개발자 최고 권한으로 로그인되었습니다.')),
+        if (_keepLoggedIn) {
+          await SessionStore.save(
+            SavedSession(
+              userId: result.studentId!,
+              userName: result.name!,
+              role: 'student',
+              isDeviceMatched: true,
+            ),
           );
+        } else {
+          await SessionStore.clear();
+        }
+        if (!mounted) return;
+        ScaffoldMessenger.of(
+          context,
+        ).showSnackBar(const SnackBar(content: Text('개발자 최고 권한으로 로그인되었습니다.')));
         Navigator.pushReplacement(
           context,
           MaterialPageRoute(
-            builder: (context) => StudentDashboard(
-              studentId: result.studentId!,
-              studentName: result.name!,
+            builder: (context) => MainDashboard(
+              userId: result.studentId!,
+              userName: result.name!,
+              role: 'student',
               isDeviceMatched: true,
             ),
           ),
@@ -69,7 +84,7 @@ class _LoginScreenState extends State<LoginScreen> {
       case LoginOutcome.success:
         ScaffoldMessenger.of(
           context,
-        ).showSnackBar(SnackBar(content: Text('✅ ${result.name}님 환영합니다!')));
+        ).showSnackBar(SnackBar(content: Text('${result.name}님 환영합니다!')));
         _navigateBasedOnRole(
           result.role!,
           result.studentId!,
@@ -99,7 +114,7 @@ class _LoginScreenState extends State<LoginScreen> {
           builder: (context, setDialogState) {
             return AlertDialog(
               title: const Text(
-                '🔒 초기 비밀번호 변경',
+                '초기 비밀번호 변경',
                 style: TextStyle(fontWeight: FontWeight.bold),
               ),
               content: Column(
@@ -129,16 +144,14 @@ class _LoginScreenState extends State<LoginScreen> {
                       )
                     : ElevatedButton(
                         style: ElevatedButton.styleFrom(
-                          backgroundColor: Colors.indigo,
+                          backgroundColor: AppPalette.ink,
                           foregroundColor: Colors.white,
                         ),
                         onPressed: () async {
                           String newPassword = newPwController.text.trim();
                           if (newPassword.isEmpty) {
                             ScaffoldMessenger.of(context).showSnackBar(
-                              const SnackBar(
-                                content: Text('⚠️ 새 비밀번호를 입력해 주세요.'),
-                              ),
+                              const SnackBar(content: Text('새 비밀번호를 입력해 주세요.')),
                             );
                             return;
                           }
@@ -154,9 +167,9 @@ class _LoginScreenState extends State<LoginScreen> {
 
                           if (success) {
                             Navigator.pop(dialogContext);
-                            ScaffoldMessenger.of(context).showSnackBar(
-                              SnackBar(content: Text(message)),
-                            );
+                            ScaffoldMessenger.of(
+                              context,
+                            ).showSnackBar(SnackBar(content: Text(message)));
                             _navigateBasedOnRole(
                               role,
                               studentId,
@@ -164,9 +177,9 @@ class _LoginScreenState extends State<LoginScreen> {
                               isDeviceMatched,
                             );
                           } else {
-                            ScaffoldMessenger.of(context).showSnackBar(
-                              SnackBar(content: Text(message)),
-                            );
+                            ScaffoldMessenger.of(
+                              context,
+                            ).showSnackBar(SnackBar(content: Text(message)));
                           }
                         },
                         child: const Text('변경하고 시작하기'),
@@ -180,45 +193,44 @@ class _LoginScreenState extends State<LoginScreen> {
   }
 
   // 🆕 권한별 화면 이동시 기기 일치 여부 파라미터(`isDeviceMatched`) 수신 및 대시보드 전달
-  void _navigateBasedOnRole(
+  Future<void> _navigateBasedOnRole(
     String role,
     String studentId,
     String name,
     bool isDeviceMatched,
-  ) {
-    if (role == 'teacher') {
-      Navigator.pushReplacement(
-        context,
-        MaterialPageRoute(
-          builder: (context) =>
-              TeacherDashboard(teacherId: studentId, teacherName: name),
+  ) async {
+    if (_keepLoggedIn) {
+      await SessionStore.save(
+        SavedSession(
+          userId: studentId,
+          userName: name,
+          role: role,
+          isDeviceMatched: isDeviceMatched,
         ),
       );
-    } else if (role == 'admin') {
-      Navigator.pushReplacement(
-        context,
-        MaterialPageRoute(builder: (context) => const AdminDashboard()),
-      );
     } else {
+      await SessionStore.clear();
+    }
+    if (!mounted) return;
     Navigator.pushReplacement(
       context,
       MaterialPageRoute(
-          builder: (context) => StudentDashboard(
-            studentId: studentId,
-            studentName: name,
+        builder: (context) => MainDashboard(
+          userId: studentId,
+          userName: name,
+          role: role,
           isDeviceMatched: isDeviceMatched,
         ),
       ),
     );
   }
-  }
 
   void _showErrorDialog(String message) {
     showDialog(
       context: context,
       builder: (ctx) => AlertDialog(
         title: const Text(
-          '⚠️ 인증 실패',
+          '인증 실패',
           style: TextStyle(fontWeight: FontWeight.bold),
         ),
         content: Text(message),
@@ -243,7 +255,7 @@ class _LoginScreenState extends State<LoginScreen> {
       barrierDismissible: false,
       builder: (BuildContext dialogContext) {
         return AlertDialog(
-          title: Text('🔒 $title 권한 인증 (기존 방식)'),
+          title: Text('$title 권한 인증 (기존 방식)'),
           content: TextField(
             controller: passwordController,
             obscureText: true,
@@ -258,7 +270,7 @@ class _LoginScreenState extends State<LoginScreen> {
                 );
               } else {
                 ScaffoldMessenger.of(context).showSnackBar(
-                  const SnackBar(content: Text('❌ 비밀번호가 올바르지 않습니다.')),
+                  const SnackBar(content: Text('비밀번호가 올바르지 않습니다.')),
                 );
               }
             },
@@ -282,7 +294,7 @@ class _LoginScreenState extends State<LoginScreen> {
                   );
                 } else {
                   ScaffoldMessenger.of(context).showSnackBar(
-                    const SnackBar(content: Text('❌ 비밀번호가 올바르지 않습니다.')),
+                    const SnackBar(content: Text('비밀번호가 올바르지 않습니다.')),
                   );
                 }
               },
@@ -300,7 +312,7 @@ class _LoginScreenState extends State<LoginScreen> {
       listenable: _controller,
       builder: (context, _) {
         return Scaffold(
-          backgroundColor: Colors.grey[50],
+          backgroundColor: AppPalette.mist,
           body: Center(
             child: SingleChildScrollView(
               padding: const EdgeInsets.all(24.0),
@@ -309,14 +321,14 @@ class _LoginScreenState extends State<LoginScreen> {
                 child: Column(
                   mainAxisAlignment: MainAxisAlignment.center,
                   children: [
-                    const Icon(Icons.school, size: 80, color: Colors.indigo),
+                    const Icon(Icons.school, size: 80, color: AppPalette.ink),
                     const SizedBox(height: 16),
                     Text(
                       '$schoolName 모니터',
                       style: const TextStyle(
                         fontSize: 26,
                         fontWeight: FontWeight.bold,
-                        color: Colors.indigo,
+                        color: AppPalette.ink,
                       ),
                     ),
                     const SizedBox(height: 8),
@@ -346,7 +358,31 @@ class _LoginScreenState extends State<LoginScreen> {
                         prefixIcon: Icon(Icons.lock),
                       ),
                     ),
-                    const SizedBox(height: 24),
+                    const SizedBox(height: 8),
+                    InkWell(
+                      onTap: () =>
+                          setState(() => _keepLoggedIn = !_keepLoggedIn),
+                      borderRadius: BorderRadius.circular(8),
+                      child: Padding(
+                        padding: const EdgeInsets.symmetric(vertical: 4),
+                        child: Row(
+                          mainAxisSize: MainAxisSize.min,
+                          children: [
+                            Checkbox(
+                              value: _keepLoggedIn,
+                              activeColor: AppPalette.ink,
+                              onChanged: (value) =>
+                                  setState(() => _keepLoggedIn = value ?? true),
+                            ),
+                            const Text(
+                              '로그인 상태 유지',
+                              style: TextStyle(color: AppPalette.ink),
+                            ),
+                          ],
+                        ),
+                      ),
+                    ),
+                    const SizedBox(height: 16),
                     _controller.isLoading
                         ? const CircularProgressIndicator()
                         : SizedBox(
@@ -354,7 +390,7 @@ class _LoginScreenState extends State<LoginScreen> {
                             height: 55,
                             child: ElevatedButton(
                               style: ElevatedButton.styleFrom(
-                                backgroundColor: Colors.indigo,
+                                backgroundColor: AppPalette.ink,
                                 foregroundColor: Colors.white,
                                 shape: RoundedRectangleBorder(
                                   borderRadius: BorderRadius.circular(12),
@@ -379,9 +415,9 @@ class _LoginScreenState extends State<LoginScreen> {
                         ),
                       ),
                       child: const Text(
-                        '👨‍🏫 선생님이신가요? 교사 회원가입 하기',
+                        '선생님이신가요? 교사 회원가입 하기',
                         style: TextStyle(
-                          color: Colors.indigo,
+                          color: AppPalette.ink,
                           fontWeight: FontWeight.bold,
                         ),
                       ),
@@ -403,7 +439,7 @@ class _LoginScreenState extends State<LoginScreen> {
                           onPressed: () => _showLegacyPasswordDialog(
                             '선생님',
                             '1234',
-                            const TeacherDashboard(),
+                            const MainDashboard(role: 'teacher'),
                           ),
                         ),
                         TextButton.icon(
@@ -419,7 +455,7 @@ class _LoginScreenState extends State<LoginScreen> {
                           onPressed: () => _showLegacyPasswordDialog(
                             '시스템 관리자',
                             '4936',
-                            const AdminDashboard(),
+                            const MainDashboard(role: 'admin'),
                           ),
                         ),
                       ],

lib/ui/main_dashboard.dart

@@ -0,0 +1,948 @@
+// 🏠 통합 대시보드 (UI 전용). 학생/교사/관리자가 전부 이 화면 하나를 공유하고,
+// 권한(role)에 따라 배너 색상/문구와 보이는 타일만 달라진다.
+// 타일 배치(위치/크기)는 사용자가 직접 편집할 수 있고, 계정별로 서버에 저장된다
+// (lib/function/dashboard_layout_controller.dart). 캔버스는 가로 6칸×세로 4칸,
+// 타일 크기는 1x1~4x4.
+import 'package:flutter/material.dart';
+import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';
+import '../function/dashboard_layout_controller.dart';
+import '../function/session_store.dart';
+import '../function/student_dashboard_controller.dart';
+import '../models/dashboard_tile_layout.dart';
+import '../theme/app_palette.dart';
+import 'admin_dashboard.dart';
+import 'app_notice.dart';
+import 'dashboard_settings_page.dart';
+import 'device_checkout_ledger_page.dart';
+import 'device_checkout_request_screen.dart';
+import 'launchpad_transition.dart';
+import 'login_screen.dart';
+import 'nfc_poccket_checkin_screen.dart';
+import 'nfc_tag_writer_screen.dart';
+import 'teacher_attendance_page.dart';
+import 'teacher_student_management_page.dart';
+
+class MainDashboard extends StatefulWidget {
+  final String? userId;
+  final String? userName;
+  final String role; // 'student' | 'teacher' | 'admin'
+  final bool isDeviceMatched;
+
+  const MainDashboard({
+    super.key,
+    this.userId,
+    this.userName,
+    required this.role,
+    this.isDeviceMatched = true,
+  });
+
+  @override
+  State<MainDashboard> createState() => _MainDashboardState();
+}
+
+class _MainDashboardState extends State<MainDashboard> {
+  final StudentDashboardController _controller = StudentDashboardController();
+  late final DashboardLayoutController _layout;
+
+  // 🎯 타일 이동/크기조절 드래그 중 기준값(드래그 시작 시점의 좌표)을 담아둔다.
+  Offset? _dragStartGlobal;
+  TileRect? _dragStartRect;
+
+  // 🔑 [권한 판정] 2061은 role이 'student'로 저장돼 있지만 실질적으로 최고 권한을 가진다.
+  bool get _isDeveloper => widget.userId == '2061';
+  bool get _isAdmin => widget.role == 'admin' || _isDeveloper;
+  bool get _isTeacherOrAbove => widget.role == 'teacher' || _isAdmin;
+  bool get _isStudent => widget.role == 'student';
+
+  String get _displayId =>
+      widget.userId ?? (widget.role == 'admin' ? '관리자' : '간편인증');
+  String get _displayName =>
+      widget.userName ?? (widget.role == 'admin' ? '시스템 관리자' : '간편인증 선생');
+
+  @override
+  void initState() {
+    super.initState();
+    _layout = DashboardLayoutController(_displayId);
+    // 📱 [기능 보류] kTileEditingEnabled가 false인 동안은 서버에서 배치를 불러올 필요가 없다.
+    if (kTileEditingEnabled) {
+      _layout.load(_tileSpecs().map((t) => t.id).toList());
+    }
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    _layout.dispose();
+    super.dispose();
+  }
+
+  void _openPocketCheckIn(BuildContext context) {
+    pushLaunchpad(
+      context,
+      (context) => NfcPocketCheckInScreen(
+        studentId: _displayId,
+        studentName: _displayName,
+      ),
+    );
+  }
+
+  Future<void> _deleteUser(String userId) async {
+    final (_, message) = await _controller.deleteUser(userId);
+    if (!mounted) return;
+    AppNotice.show(context, message);
+  }
+
+  void _showDeleteUserDialog(BuildContext context) {
+    final TextEditingController idController = TextEditingController();
+
+    showDialog(
+      context: context,
+      builder: (context) {
+        return AlertDialog(
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(24),
+          ),
+          title: const Row(
+            children: [
+              Icon(Icons.warning_amber_rounded, color: Colors.redAccent),
+              SizedBox(width: 10),
+              Text(
+                '계정 강제 삭제',
+                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 18),
+              ),
+            ],
+          ),
+          content: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              const Text(
+                '학생의 학번 또는 교사의 교직원 번호를 입력하세요.\nDB에서 해당 계정과 토큰이 즉시 삭제됩니다.',
+                style: TextStyle(
+                  color: Colors.black54,
+                  fontSize: 13,
+                  height: 1.4,
+                ),
+              ),
+              const SizedBox(height: 16),
+              TextField(
+                controller: idController,
+                decoration: InputDecoration(
+                  labelText: '학번 또는 교직원 번호',
+                  hintText: '예: 201101 또는 T1001',
+                  labelStyle: TextStyle(color: Colors.red[400]),
+                  focusedBorder: OutlineInputBorder(
+                    borderRadius: BorderRadius.circular(16),
+                    borderSide: BorderSide(color: Colors.red[400]!, width: 2),
+                  ),
+                  border: OutlineInputBorder(
+                    borderRadius: BorderRadius.circular(16),
+                  ),
+                  prefixIcon: const Icon(Icons.person_remove_alt_1_rounded),
+                ),
+              ),
+            ],
+          ),
+          actions: [
+            TextButton(
+              onPressed: () => Navigator.pop(context),
+              child: const Text(
+                '취소',
+                style: TextStyle(
+                  color: Colors.grey,
+                  fontWeight: FontWeight.bold,
+                ),
+              ),
+            ),
+            ElevatedButton(
+              onPressed: () {
+                final inputId = idController.text.trim();
+                if (inputId.isNotEmpty) {
+                  Navigator.pop(context);
+                  _deleteUser(inputId);
+                }
+              },
+              style: ElevatedButton.styleFrom(
+                backgroundColor: Colors.redAccent,
+                foregroundColor: Colors.white,
+                shape: RoundedRectangleBorder(
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                elevation: 0,
+              ),
+              child: const Text(
+                '삭제 실행',
+                style: TextStyle(fontWeight: FontWeight.bold),
+              ),
+            ),
+          ],
+        );
+      },
+    );
+  }
+
+  Future<void> _logout(BuildContext context) async {
+    await SessionStore.clear();
+    if (!context.mounted) return;
+    Navigator.pushReplacement(
+      context,
+      MaterialPageRoute(builder: (context) => const LoginScreen()),
+    );
+  }
+
+  // 🚀 오른쪽 위 ">" 버튼 — 로그아웃/설정을 런치패드 스타일 메뉴로 띄운다.
+  Future<void> _openMenu(BuildContext context) async {
+    final action = await showLaunchpadMenu<String>(
+      context: context,
+      builder: (context) => Align(
+        alignment: Alignment.topRight,
+        child: SafeArea(
+          child: Padding(
+            padding: const EdgeInsets.only(top: 8, right: 12),
+            child: _DashboardMenuCard(
+              onLogout: () => Navigator.pop(context, 'logout'),
+              onSettings: () => Navigator.pop(context, 'settings'),
+            ),
+          ),
+        ),
+      ),
+    );
+    if (!context.mounted) return;
+    if (action == 'logout') {
+      _logout(context);
+    } else if (action == 'settings') {
+      _openSettings(context);
+    }
+  }
+
+  Future<void> _openSettings(BuildContext context) async {
+    final result = await pushLaunchpad<String>(
+      context,
+      (context) => const DashboardSettingsPage(),
+    );
+    if (result == 'edit_ui' && kTileEditingEnabled) {
+      _layout.enterEditMode();
+    }
+  }
+
+  // 🎨 [역할별 테마] 배너 색상은 팔레트로 통일하고, 제목/문구/아이콘만 역할에 따라 다르게.
+  ({String title, String subtitle, Color color, IconData icon}) _theme() {
+    if (_isDeveloper) {
+      return (
+        title: 'MASTER CONTROL',
+        subtitle: '최고 관리 권한 활성화됨',
+        color: AppPalette.ink,
+        icon: Icons.admin_panel_settings_rounded,
+      );
+    } else if (widget.role == 'admin') {
+      return (
+        title: 'ADMIN CONTROL',
+        subtitle: '시스템 관리자 권한 활성화됨',
+        color: AppPalette.ink,
+        icon: Icons.admin_panel_settings_rounded,
+      );
+    } else if (widget.role == 'teacher') {
+      return (
+        title: 'TEACHER PORTAL',
+        subtitle: '교직원 번호: $_displayId | 교사 권한 활성화됨',
+        color: AppPalette.ink,
+        icon: Icons.admin_panel_settings_rounded,
+      );
+    }
+    return (
+      title: 'STUDENT PORTAL',
+      subtitle: '학번: $_displayId | 인증 완료',
+      color: AppPalette.ink,
+      icon: Icons.school_rounded,
+    );
+  }
+
+  // 🧩 역할에 따라 보이는 타일 목록. id는 서버 레이아웃 저장의 키로 쓰이므로 절대 바뀌면 안 된다.
+  List<({String id, Widget child})> _tileSpecs() {
+    final List<({String id, Widget child})> tiles = [];
+
+    if (_isStudent) {
+      tiles.add((
+        id: 'nfc_tag',
+        child: _buildModernCard(
+          icon: widget.isDeviceMatched
+              ? Icons.contactless_rounded
+              : Icons.lock_rounded,
+          title: 'NFC 태그',
+          subtitle: widget.isDeviceMatched ? '출석 및 폰 수거 완료' : '본인 인증 기기 전용',
+          color: widget.isDeviceMatched ? AppPalette.ink : AppPalette.sage,
+          onTap: widget.isDeviceMatched
+              ? () => _openPocketCheckIn(context)
+              : () => AppNotice.show(
+                  context,
+                  '대리 출석 방지를 위해 등록된 본인 스마트폰에서만 출석 가능합니다.',
+                  icon: Icons.lock_rounded,
+                ),
+          isActionButton: widget.isDeviceMatched,
+          isLoading: _controller.isLoading,
+        ),
+      ));
+      tiles.add((
+        id: 'school_status',
+        child: _buildModernCard(
+          icon: Icons.fastfood_rounded,
+          title: '실시간 학교 상황',
+          subtitle: '급식실 줄 & 매점 재고 확인',
+          color: AppPalette.ink,
+          onTap: () => AppNotice.show(
+            context,
+            '실시간 학교 상황 페이지로 이동합니다.',
+            icon: Icons.fastfood_rounded,
+          ),
+        ),
+      ));
+      tiles.add((
+        id: 'device_checkout_request',
+        child: _buildModernCard(
+          icon: Icons.tablet_mac_rounded,
+          title: '스마트기기 반출',
+          subtitle: '패드 사용 신청 (시간/목적)',
+          color: AppPalette.ink,
+          onTap: () => pushLaunchpad(
+            context,
+            (context) => DeviceCheckoutRequestScreen(
+              studentId: _displayId,
+              studentName: _displayName,
+            ),
+          ),
+        ),
+      ));
+    }
+
+    if (_isTeacherOrAbove) {
+      tiles.add((
+        id: 'attendance_check',
+        child: _buildModernCard(
+          icon: Icons.assignment_turned_in_rounded,
+          title: '실시간 출석 확인',
+          subtitle: '학생 제출 로그 모니터링',
+          color: AppPalette.ink,
+          onTap: () => pushLaunchpad(
+            context,
+            (context) => const TeacherAttendancePage(),
+          ),
+        ),
+      ));
+      tiles.add((
+        id: 'student_management',
+        child: _buildModernCard(
+          icon: Icons.manage_accounts_rounded,
+          title: '학생 계정 관리',
+          subtitle: '계정 추가 및 강제 리셋',
+          color: AppPalette.ink,
+          onTap: () => pushLaunchpad(
+            context,
+            (context) => const TeacherStudentManagementPage(),
+          ),
+        ),
+      ));
+      tiles.add((
+        id: 'device_checkout_ledger',
+        child: _buildModernCard(
+          icon: Icons.tablet_mac_rounded,
+          title: '스마트기기 반출 대장',
+          subtitle: '패드 반출 신청 승인/거절',
+          color: AppPalette.ink,
+          onTap: () => pushLaunchpad(
+            context,
+            (context) => DeviceCheckoutLedgerPage(
+              teacherId: widget.userId,
+              teacherName: widget.userName,
+            ),
+          ),
+        ),
+      ));
+    }
+
+    if (_isAdmin) {
+      tiles.add((
+        id: 'admin_db',
+        child: _buildModernCard(
+          icon: Icons.terminal_rounded,
+          title: '서버 DB 제어',
+          subtitle: '시스템 원격 초기화',
+          color: AppPalette.ink,
+          onTap: () =>
+              pushLaunchpad(context, (context) => const AdminDashboard()),
+        ),
+      ));
+      tiles.add((
+        id: 'delete_account',
+        child: _buildModernCard(
+          icon: Icons.delete_sweep_rounded,
+          title: '계정 강제 삭제',
+          subtitle: '학생 및 교사 DB 삭제',
+          color: AppPalette.ink,
+          onTap: () => _showDeleteUserDialog(context),
+        ),
+      ));
+      tiles.add((
+        id: 'nfc_tag_writer',
+        child: _buildModernCard(
+          icon: Icons.edit_note_rounded,
+          title: 'NFC 태그 쓰기',
+          subtitle: '주머니 스티커 초기 설정',
+          color: AppPalette.ink,
+          onTap: () =>
+              pushLaunchpad(context, (context) => const NfcTagWriterScreen()),
+        ),
+      ));
+    }
+
+    return tiles;
+  }
+
+  // ─────────────────────────────────────────────────────────
+  // 🖐️ 편집 모드: 드래그로 이동, 모서리 손잡이로 크기 조절 (1x1~4x4).
+  // ─────────────────────────────────────────────────────────
+  void _onMovePanStart(String id, DragStartDetails details) {
+    _dragStartGlobal = details.globalPosition;
+    _dragStartRect = _layout.positions[id];
+  }
+
+  void _onMovePanUpdate(String id, double cellSize, DragUpdateDetails details) {
+    if (_dragStartGlobal == null || _dragStartRect == null) return;
+    final delta = details.globalPosition - _dragStartGlobal!;
+    final dx = (delta.dx / cellSize).round();
+    final dy = (delta.dy / cellSize).round();
+    _layout.tryMove(id, _dragStartRect!.x + dx, _dragStartRect!.y + dy);
+  }
+
+  void _onMovePanEnd(DragEndDetails details) {
+    _dragStartGlobal = null;
+    _dragStartRect = null;
+  }
+
+  void _onResizePanStart(String id, DragStartDetails details) {
+    _dragStartGlobal = details.globalPosition;
+    _dragStartRect = _layout.positions[id];
+  }
+
+  void _onResizePanUpdate(
+    String id,
+    double cellSize,
+    DragUpdateDetails details,
+  ) {
+    if (_dragStartGlobal == null || _dragStartRect == null) return;
+    final delta = details.globalPosition - _dragStartGlobal!;
+    final dw = (delta.dx / cellSize).round();
+    final dh = (delta.dy / cellSize).round();
+    _layout.tryResize(id, _dragStartRect!.w + dw, _dragStartRect!.h + dh);
+  }
+
+  Future<void> _saveAndExitEdit() async {
+    await _layout.save();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return ListenableBuilder(
+      listenable: Listenable.merge([_controller, _layout]),
+      builder: (context, _) {
+        final theme = _theme();
+        final tiles = _tileSpecs();
+        final bool isEditing = _layout.isEditing;
+
+        return Scaffold(
+          backgroundColor: AppPalette.mist,
+          // 🪶 큰 색상 배너 대신 작은 프로필 카드를 본문에 두므로, 앱바는 ">" 메뉴
+          // 버튼(또는 편집 중 "완료" 버튼)만 올려두는 투명한 얇은 바로 둔다.
+          appBar: AppBar(
+            backgroundColor: Colors.transparent,
+            foregroundColor: AppPalette.ink,
+            elevation: 0,
+            actions: isEditing
+                ? [
+                    TextButton.icon(
+                      onPressed: _layout.isSaving ? null : _saveAndExitEdit,
+                      icon: _layout.isSaving
+                          ? const SizedBox(
+                              width: 16,
+                              height: 16,
+                              child: CircularProgressIndicator(strokeWidth: 2),
+                            )
+                          : const Icon(Icons.check_rounded),
+                      label: const Text('완료'),
+                    ),
+                  ]
+                : [
+                    IconButton(
+                      icon: const Icon(Icons.chevron_right_rounded),
+                      tooltip: '메뉴',
+                      onPressed: () => _openMenu(context),
+                    ),
+                  ],
+          ),
+          body: SingleChildScrollView(
+            physics: isEditing
+                ? const NeverScrollableScrollPhysics()
+                : const AlwaysScrollableScrollPhysics(),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                const SizedBox(height: 8),
+                // 🪪 작은 프로필 카드로 배치 — 화면 전체를 차지하던 배너 대신
+                // 가운데에 떠 있는 카드 하나만 둔다.
+                Center(
+                  child: Container(
+                    padding: const EdgeInsets.symmetric(
+                      horizontal: 28,
+                      vertical: 18,
+                    ),
+                    decoration: BoxDecoration(
+                      color: theme.color,
+                      borderRadius: BorderRadius.circular(24),
+                      boxShadow: [
+                        BoxShadow(
+                          color: theme.color.withValues(alpha: 0.25),
+                          blurRadius: 16,
+                          offset: const Offset(0, 6),
+                        ),
+                      ],
+                    ),
+                    child: Column(
+                      mainAxisSize: MainAxisSize.min,
+                      children: [
+                        Text(
+                          theme.title,
+                          style: const TextStyle(
+                            fontWeight: FontWeight.bold,
+                            letterSpacing: 1.2,
+                            color: Colors.white,
+                            fontSize: 13,
+                          ),
+                        ),
+                        const SizedBox(height: 10),
+                        Container(
+                          padding: const EdgeInsets.all(4),
+                          decoration: const BoxDecoration(
+                            color: Colors.white,
+                            shape: BoxShape.circle,
+                          ),
+                          child: CircleAvatar(
+                            radius: 22,
+                            backgroundColor: AppPalette.linen,
+                            child: Icon(
+                              theme.icon,
+                              size: 22,
+                              color: theme.color,
+                            ),
+                          ),
+                        ),
+                        const SizedBox(height: 10),
+                        Text(
+                          '$_displayName 님',
+                          textAlign: TextAlign.center,
+                          style: const TextStyle(
+                            fontSize: 17,
+                            fontWeight: FontWeight.bold,
+                            color: Colors.white,
+                          ),
+                        ),
+                        const SizedBox(height: 3),
+                        Text(
+                          theme.subtitle,
+                          textAlign: TextAlign.center,
+                          style: TextStyle(
+                            color: Colors.white.withValues(alpha: 0.8),
+                            fontSize: 12,
+                          ),
+                        ),
+                      ],
+                    ),
+                  ),
+                ),
+                const SizedBox(height: 28),
+                Padding(
+                  padding: const EdgeInsets.symmetric(horizontal: 24.0),
+                  child: Row(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    children: [
+                      Container(
+                        width: 4,
+                        height: 18,
+                        decoration: BoxDecoration(
+                          color: theme.color,
+                          borderRadius: BorderRadius.circular(2),
+                        ),
+                      ),
+                      const SizedBox(width: 10),
+                      const Text(
+                        '스마트 관리 시스템 메뉴',
+                        style: TextStyle(
+                          fontSize: 18,
+                          fontWeight: FontWeight.bold,
+                          color: AppPalette.ink,
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+                if (isEditing)
+                  const Padding(
+                    padding: EdgeInsets.only(top: 8, left: 24, right: 24),
+                    child: Text(
+                      '타일을 드래그해서 옮기고, 오른쪽 아래 손잡이로 크기를 바꿔보세요.',
+                      textAlign: TextAlign.center,
+                      style: TextStyle(color: AppPalette.sage, fontSize: 12),
+                    ),
+                  ),
+                const SizedBox(height: 16),
+                // 📱 [기능 보류] kTileEditingEnabled가 꺼져 있는 동안은 화면 크기에 맞춰
+                // 알아서 줄서는 기본 그리드를 쓰고, 드래그 편집용 캔버스는 쓰지 않는다.
+                kTileEditingEnabled
+                    ? (_layout.isLoading
+                          ? const Padding(
+                              padding: EdgeInsets.symmetric(vertical: 40),
+                              child: Center(child: CircularProgressIndicator()),
+                            )
+                          : _buildGridCanvas(tiles, isEditing))
+                    : _buildSimpleGrid(tiles),
+                const SizedBox(height: 32),
+              ],
+            ),
+          ),
+        );
+      },
+    );
+  }
+
+  // 🧱 타일마다 크기(가로/세로 칸 수)가 다른 매이슨리(벽돌쌓기) 그리드.
+  // 화면 폭에 맞춰 열 개수가 자동으로 바뀌기 때문에 폰에서도 안 깨진다.
+  // id는 서버 레이아웃 저장용 키와 같지만, 여기서는 그냥 "이 타일이 몇 칸짜리인지" 찾는 데만 쓴다.
+  static const Map<String, (int w, int h)> _tileSpans = {
+    'nfc_tag': (1, 2),
+    'attendance_check': (2, 1),
+    'admin_db': (2, 1),
+  };
+
+  (int, int) _spanFor(String id) => _tileSpans[id] ?? (1, 1);
+
+  Widget _buildSimpleGrid(List<({String id, Widget child})> tiles) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(horizontal: 24.0),
+      child: LayoutBuilder(
+        builder: (context, constraints) {
+          final double width = constraints.maxWidth;
+          // 🔲 정사각형 1칸 기준 4×3 배치 — 화면이 넓어도 6칸까지 늘리지 않고 4칸에서 멈춘다.
+          final int crossAxisCount = width < 420
+              ? 2
+              : width < 700
+              ? 3
+              : 4;
+          // 📏 1칸(1x1) 크기가 대략 계정 프로필 카드만 해지도록 목표 크기를 잡고,
+          // 화면이 그보다 넓으면 가운데로 모아서 여백을 준다(좁으면 화면 폭에 맞춤).
+          const double targetCellSize = 184;
+          const double gap = 12;
+          final double idealGridWidth =
+              crossAxisCount * targetCellSize + (crossAxisCount - 1) * gap;
+          final double gridWidth = width < idealGridWidth
+              ? width
+              : idealGridWidth;
+
+          return Center(
+            child: SizedBox(
+              width: gridWidth,
+              child: StaggeredGrid.count(
+                crossAxisCount: crossAxisCount,
+                mainAxisSpacing: gap,
+                crossAxisSpacing: gap,
+                children: [
+                  for (final tile in tiles)
+                    StaggeredGridTile.count(
+                      crossAxisCellCount: _spanFor(
+                        tile.id,
+                      ).$1.clamp(1, crossAxisCount),
+                      mainAxisCellCount: _spanFor(tile.id).$2,
+                      child: tile.child,
+                    ),
+                ],
+              ),
+            ),
+          );
+        },
+      ),
+    );
+  }
+
+  Widget _buildGridCanvas(
+    List<({String id, Widget child})> tiles,
+    bool isEditing,
+  ) {
+    const double gap = 10;
+    const double maxCanvasWidth = 720;
+
+    return LayoutBuilder(
+      builder: (context, constraints) {
+        final double canvasWidth = constraints.maxWidth < maxCanvasWidth
+            ? constraints.maxWidth - 24
+            : maxCanvasWidth;
+        final double cellSize = canvasWidth / kGridCols;
+        final double canvasHeight = cellSize * kGridRows;
+
+        final List<Widget> positioned = [];
+        for (final tile in tiles) {
+          final rect = _layout.positions[tile.id];
+          if (rect == null) continue; // 캔버스가 꽉 차서 자리를 못 찾은 타일
+
+          final double left = rect.x * cellSize;
+          final double top = rect.y * cellSize;
+          final double w = rect.w * cellSize - gap;
+          final double h = rect.h * cellSize - gap;
+
+          positioned.add(
+            Positioned(
+              key: ValueKey(tile.id),
+              left: left,
+              top: top,
+              width: w,
+              height: h,
+              child: Stack(
+                clipBehavior: Clip.none,
+                children: [
+                  Positioned.fill(
+                    child: IgnorePointer(
+                      ignoring: isEditing,
+                      child: tile.child,
+                    ),
+                  ),
+                  if (isEditing)
+                    Positioned.fill(
+                      child: GestureDetector(
+                        behavior: HitTestBehavior.translucent,
+                        onPanStart: (d) => _onMovePanStart(tile.id, d),
+                        onPanUpdate: (d) =>
+                            _onMovePanUpdate(tile.id, cellSize, d),
+                        onPanEnd: _onMovePanEnd,
+                      ),
+                    ),
+                  if (isEditing)
+                    Positioned(
+                      right: 2,
+                      bottom: 2,
+                      child: GestureDetector(
+                        onPanStart: (d) => _onResizePanStart(tile.id, d),
+                        onPanUpdate: (d) =>
+                            _onResizePanUpdate(tile.id, cellSize, d),
+                        onPanEnd: _onMovePanEnd,
+                        child: Container(
+                          width: 26,
+                          height: 26,
+                          decoration: BoxDecoration(
+                            color: AppPalette.ink,
+                            borderRadius: BorderRadius.circular(8),
+                            border: Border.all(
+                              color: AppPalette.paper,
+                              width: 2,
+                            ),
+                          ),
+                          child: const Icon(
+                            Icons.open_in_full_rounded,
+                            size: 14,
+                            color: AppPalette.paper,
+                          ),
+                        ),
+                      ),
+                    ),
+                ],
+              ),
+            ),
+          );
+        }
+
+        return Center(
+          child: SizedBox(
+            width: canvasWidth,
+            height: canvasHeight,
+            child: Stack(children: positioned),
+          ),
+        );
+      },
+    );
+  }
+
+  // 💎 [카드 디자인 위젯] 타일 크기가 커지면 아이콘/글자도 비례해서 커진다.
+  Widget _buildModernCard({
+    required IconData icon,
+    required String title,
+    required String subtitle,
+    required Color color,
+    required VoidCallback onTap,
+    bool isActionButton = false,
+    bool isLoading = false,
+  }) {
+    return LayoutBuilder(
+      builder: (context, constraints) {
+        // 📏 타일의 실제 픽셀 크기를 기준으로 배율을 계산 (1x1 기준 ≈ 1.0).
+        // 가로/세로 중 더 작은 쪽을 기준으로 삼아야, 가로로 넓지만 낮은 타일에서
+        // 배율이 과하게 커져 내용이 넘치는 걸 막을 수 있다.
+        final double referenceSize = constraints.hasBoundedHeight
+            ? constraints.maxWidth < constraints.maxHeight
+                  ? constraints.maxWidth
+                  : constraints.maxHeight
+            : constraints.maxWidth;
+        final double scale = (referenceSize / 110).clamp(1.0, 3.4);
+        final double iconBoxPadding = 6 + 6 * (scale - 1);
+        final double iconSize = 16 + 10 * (scale - 1);
+        final double iconRadius = 10 + 6 * (scale - 1);
+        final double cardPadding = 8 + 8 * (scale - 1);
+        final double cardRadius = 16 + 6 * (scale - 1);
+        final double titleFontSize = (10 + 3 * (scale - 1)).clamp(10, 18);
+        final double subtitleFontSize = (8 + 2 * (scale - 1)).clamp(8, 14);
+
+        return InkWell(
+          onTap: isLoading ? null : onTap,
+          borderRadius: BorderRadius.circular(cardRadius),
+          child: Ink(
+            padding: EdgeInsets.all(cardPadding),
+            decoration: BoxDecoration(
+              color: AppPalette.paper,
+              borderRadius: BorderRadius.circular(cardRadius),
+              border: Border.all(color: AppPalette.sage, width: 1),
+            ),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: [
+                Container(
+                  padding: EdgeInsets.all(iconBoxPadding),
+                  decoration: BoxDecoration(
+                    color: AppPalette.linen,
+                    borderRadius: BorderRadius.circular(iconRadius),
+                  ),
+                  child: Icon(icon, color: color, size: iconSize),
+                ),
+                Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Row(
+                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                      children: [
+                        Expanded(
+                          child: Text(
+                            title,
+                            maxLines: 2,
+                            overflow: TextOverflow.ellipsis,
+                            style: TextStyle(
+                              fontSize: titleFontSize,
+                              fontWeight: FontWeight.bold,
+                              color: AppPalette.ink,
+                            ),
+                          ),
+                        ),
+                        if (isLoading)
+                          const SizedBox(
+                            width: 14,
+                            height: 14,
+                            child: CircularProgressIndicator(strokeWidth: 2),
+                          )
+                        else if (isActionButton)
+                          Icon(
+                            Icons.touch_app_rounded,
+                            size: 14,
+                            color: color.withValues(alpha: 0.5),
+                          ),
+                      ],
+                    ),
+                    SizedBox(height: 1 + 2 * (scale - 1)),
+                    Text(
+                      subtitle,
+                      maxLines: 2,
+                      overflow: TextOverflow.ellipsis,
+                      style: TextStyle(
+                        fontSize: subtitleFontSize,
+                        color: AppPalette.ink.withValues(alpha: 0.55),
+                        height: 1.15,
+                      ),
+                    ),
+                  ],
+                ),
+              ],
+            ),
+          ),
+        );
+      },
+    );
+  }
+}
+
+// 🚀 오른쪽 위 ">" 버튼을 누르면 뜨는 런치패드 스타일 메뉴 카드.
+class _DashboardMenuCard extends StatelessWidget {
+  final VoidCallback onLogout;
+  final VoidCallback onSettings;
+
+  const _DashboardMenuCard({required this.onLogout, required this.onSettings});
+
+  @override
+  Widget build(BuildContext context) {
+    return Material(
+      color: AppPalette.paper,
+      elevation: 8,
+      shadowColor: Colors.black.withValues(alpha: 0.3),
+      borderRadius: BorderRadius.circular(20),
+      child: IntrinsicWidth(
+        child: ConstrainedBox(
+          constraints: const BoxConstraints(minWidth: 180),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: [
+              _MenuRow(
+                icon: Icons.logout_rounded,
+                label: '로그아웃',
+                onTap: onLogout,
+              ),
+              const Divider(height: 1, color: AppPalette.sage),
+              _MenuRow(
+                icon: Icons.settings_outlined,
+                label: '설정',
+                onTap: onSettings,
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class _MenuRow extends StatelessWidget {
+  final IconData icon;
+  final String label;
+  final VoidCallback onTap;
+
+  const _MenuRow({
+    required this.icon,
+    required this.label,
+    required this.onTap,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return InkWell(
+      onTap: onTap,
+      child: Padding(
+        padding: const EdgeInsets.symmetric(horizontal: 18, vertical: 14),
+        child: Row(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Icon(icon, size: 20, color: AppPalette.ink),
+            const SizedBox(width: 12),
+            Text(
+              label,
+              style: const TextStyle(
+                fontWeight: FontWeight.w600,
+                color: AppPalette.ink,
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/ui/nfc_poccket_checkin_screen.dart

@@ -72,7 +72,7 @@ class _NfcPocketCheckInScreenState extends State<NfcPocketCheckInScreen> {
       builder: (context) => AlertDialog(
         backgroundColor: Colors.red[50],
         title: const Text(
-          "🚨 무단 반출 감지",
+          "무단 반출 감지",
           style: TextStyle(color: Colors.red, fontWeight: FontWeight.bold),
         ),
         content: Text(
@@ -98,7 +98,7 @@ class _NfcPocketCheckInScreenState extends State<NfcPocketCheckInScreen> {
       context: context,
       barrierDismissible: false,
       builder: (context) => AlertDialog(
-        title: const Text("🛡️ 감시 모드 켜기 전에"),
+        title: const Text("감시 모드 켜기 전에"),
         content: const Text(
           "iOS는 화면을 잠그면 감시가 끊겨요. 아래 순서로 '가이드 접근'을 먼저 켜주세요.\n\n"
           "1. 사이드(또는 홈) 버튼 3번 빠르게 누르기\n"
@@ -127,9 +127,9 @@ class _NfcPocketCheckInScreenState extends State<NfcPocketCheckInScreen> {
     showDialog(
       context: context,
       builder: (context) => AlertDialog(
-        title: const Text("🎉 자습실 출석 완료!"),
+        title: const Text("자습실 출석 완료!"),
         content: Text(
-          "${widget.studentName} 학생!\n[$pocketNumber] 주머니 출석이 확인되었습니다.\n\n폰을 주머니에 쏙 넣고 자습에 집중해 주세요! ✏️",
+          "${widget.studentName} 학생!\n[$pocketNumber] 주머니 출석이 확인되었습니다.\n\n폰을 주머니에 쏙 넣고 자습에 집중해 주세요!",
         ),
         actions: [
           TextButton(
@@ -161,7 +161,10 @@ class _NfcPocketCheckInScreenState extends State<NfcPocketCheckInScreen> {
           appBar: AppBar(
             title: const Text(
               "자습실 NFC 출석체크",
-              style: TextStyle(color: Colors.white, fontWeight: FontWeight.bold),
+              style: TextStyle(
+                color: Colors.white,
+                fontWeight: FontWeight.bold,
+              ),
             ),
             backgroundColor: const Color.fromARGB(255, 48, 48, 52),
           ),
@@ -258,8 +261,8 @@ class _NfcPocketCheckInScreenState extends State<NfcPocketCheckInScreen> {
               const SizedBox(height: 8),
               Text(
                 !kIsWeb && Platform.isIOS
-                    ? "🔒 가이드 접근을 켠 채로 화면만 잠기도록 두세요.\n(임의로 앱을 나가면 감시가 끊깁니다)\n감시를 끝내려면 가이드 접근을 먼저 끄고 다시 태깅하세요."
-                    : "📴 화면을 꺼도 감시는 계속됩니다.\n알림바에서 상태를 확인할 수 있어요.\n(폰을 꺼내 다시 태깅하면 반출 처리됩니다)",
+                    ? "가이드 접근을 켠 채로 화면만 잠기도록 두세요.\n(임의로 앱을 나가면 감시가 끊깁니다)\n감시를 끝내려면 가이드 접근을 먼저 끄고 다시 태깅하세요."
+                    : "화면을 꺼도 감시는 계속됩니다.\n알림바에서 상태를 확인할 수 있어요.\n(폰을 꺼내 다시 태깅하면 반출 처리됩니다)",
                 textAlign: TextAlign.center,
                 style: const TextStyle(color: Colors.white38, fontSize: 13),
               ),

lib/ui/nfc_tag_writer_screen.dart

@@ -2,6 +2,7 @@
 // 버튼/입력폼을 그린다. NFC 세션/서버 통신은 lib/function/nfc_tag_writer_controller.dart가 담당한다.
 import 'package:flutter/material.dart';
 import '../function/nfc_tag_writer_controller.dart';
+import '../theme/app_palette.dart';
 
 class NfcTagWriterScreen extends StatefulWidget {
   const NfcTagWriterScreen({super.key});
@@ -49,10 +50,11 @@ class _NfcTagWriterScreenState extends State<NfcTagWriterScreen> {
       builder: (context, _) {
         final bool isWriting = _controller.isWriting;
         return Scaffold(
+          backgroundColor: AppPalette.mist,
           appBar: AppBar(
-            title: const Text("🏷️ NFC 주머니 태그 쓰기"),
-            backgroundColor: Colors.deepPurple,
-            foregroundColor: Colors.white,
+            title: const Text("NFC 주머니 태그 쓰기"),
+            backgroundColor: AppPalette.ink,
+            foregroundColor: AppPalette.paper,
           ),
           body: Padding(
             padding: const EdgeInsets.all(24.0),
@@ -73,7 +75,7 @@ class _NfcTagWriterScreenState extends State<NfcTagWriterScreen> {
                 Icon(
                   isWriting ? Icons.nfc : Icons.edit_note_rounded,
                   size: 80,
-                  color: isWriting ? Colors.orange : Colors.deepPurple,
+                  color: isWriting ? Colors.orange : AppPalette.ink,
                 ),
                 const SizedBox(height: 16),
                 Text(
@@ -87,8 +89,8 @@ class _NfcTagWriterScreenState extends State<NfcTagWriterScreen> {
                   height: 55,
                   child: ElevatedButton(
                     style: ElevatedButton.styleFrom(
-                      backgroundColor: Colors.deepPurple,
-                      foregroundColor: Colors.white,
+                      backgroundColor: AppPalette.ink,
+                      foregroundColor: AppPalette.paper,
                     ),
                     onPressed: isWriting
                         ? null

lib/ui/student_dashboard.dart

@@ -1,511 +0,0 @@
-// 🎓 학생 대시보드 (UI 전용). NFC 주머니 체크인 진입, 실시간 학교 상황 안내,
-// 개발자 마스터 계정 전용 관리 메뉴(현황/DB제어/계정관리/삭제) 카드를 그린다.
-// 계정 삭제 서버 통신은 lib/function/student_dashboard_controller.dart가 담당한다.
-import 'package:flutter/material.dart';
-import '../function/student_dashboard_controller.dart';
-import 'nfc_poccket_checkin_screen.dart';
-import 'login_screen.dart';
-import 'teacher_attendance_page.dart';
-import 'admin_dashboard.dart';
-import 'teacher_student_management_page.dart';
-import 'nfc_tag_writer_screen.dart';
-
-// -------------------------------------------------------------
-// 2. 학생 대시보드 (StudentDashboard)
-// -------------------------------------------------------------
-
-class StudentDashboard extends StatefulWidget {
-  final String studentId;
-  final String studentName;
-  final bool isDeviceMatched; // 🆕 [변경] 기기 UUID가 매칭되었는지 확인하는 변수 추가
-
-  const StudentDashboard({
-    super.key,
-    required this.studentId,
-    required this.studentName,
-    required this.isDeviceMatched, // 🆕 [변경] 필수 매개변수로 등록
-  });
-
-  @override
-  State<StudentDashboard> createState() => _StudentDashboardState();
-}
-
-class _StudentDashboardState extends State<StudentDashboard> {
-  final StudentDashboardController _controller = StudentDashboardController();
-
-  @override
-  void dispose() {
-    _controller.dispose();
-    super.dispose();
-  }
-
-  // 1️⃣ NFC 태그 카드 → 실제 NFC 주머니 체크인 화면으로 이동
-  void _openPocketCheckIn(BuildContext context) {
-    Navigator.push(
-      context,
-      MaterialPageRoute(
-        builder: (context) => NfcPocketCheckInScreen(
-          studentId: widget.studentId,
-          studentName: widget.studentName,
-        ),
-      ),
-    );
-  }
-
-  // 2️⃣ [기존 동일] 마스터 계정 전용 회원 삭제 버튼 동작
-  Future<void> _deleteUser(String userId) async {
-    final (_, message) = await _controller.deleteUser(userId);
-    if (!mounted) return;
-    ScaffoldMessenger.of(
-      context,
-    ).showSnackBar(SnackBar(content: Text(message)));
-  }
-
-  // 3️⃣ [기존 동일] 학번/교직원 번호를 입력받는 모던 팝업창(Dialog)
-  void _showDeleteUserDialog(BuildContext context) {
-    final TextEditingController idController = TextEditingController();
-
-    showDialog(
-      context: context,
-      builder: (context) {
-        return AlertDialog(
-          shape: RoundedRectangleBorder(
-            borderRadius: BorderRadius.circular(24),
-          ),
-          title: const Row(
-            children: [
-              Icon(Icons.warning_amber_rounded, color: Colors.redAccent),
-              SizedBox(width: 10),
-              Text(
-                '계정 강제 삭제',
-                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 18),
-              ),
-            ],
-          ),
-          content: Column(
-            mainAxisSize: MainAxisSize.min,
-            crossAxisAlignment: CrossAxisAlignment.start,
-            children: [
-              const Text(
-                '학생의 학번 또는 교사의 교직원 번호를 입력하세요.\nDB에서 해당 계정과 토큰이 즉시 삭제됩니다.',
-                style: TextStyle(
-                  color: Colors.black54,
-                  fontSize: 13,
-                  height: 1.4,
-                ),
-              ),
-              const SizedBox(height: 16),
-              TextField(
-                controller: idController,
-                decoration: InputDecoration(
-                  labelText: '학번 또는 교직원 번호',
-                  hintText: '예: 201101 또는 T1001',
-                  labelStyle: TextStyle(color: Colors.red[400]),
-                  focusedBorder: OutlineInputBorder(
-                    borderRadius: BorderRadius.circular(16),
-                    borderSide: BorderSide(color: Colors.red[400]!, width: 2),
-                  ),
-                  border: OutlineInputBorder(
-                    borderRadius: BorderRadius.circular(16),
-                  ),
-                  prefixIcon: const Icon(Icons.person_remove_alt_1_rounded),
-                ),
-              ),
-            ],
-          ),
-          actions: [
-            TextButton(
-              onPressed: () => Navigator.pop(context),
-              child: const Text(
-                '취소',
-                style: TextStyle(
-                  color: Colors.grey,
-                  fontWeight: FontWeight.bold,
-                ),
-              ),
-            ),
-            ElevatedButton(
-              onPressed: () {
-                final inputId = idController.text.trim();
-                if (inputId.isNotEmpty) {
-                  Navigator.pop(context);
-                  _deleteUser(inputId);
-                }
-              },
-              style: ElevatedButton.styleFrom(
-                backgroundColor: Colors.redAccent,
-                foregroundColor: Colors.white,
-                shape: RoundedRectangleBorder(
-                  borderRadius: BorderRadius.circular(12),
-                ),
-                elevation: 0,
-              ),
-              child: const Text(
-                '삭제 실행',
-                style: TextStyle(fontWeight: FontWeight.bold),
-              ),
-            ),
-          ],
-        );
-      },
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return ListenableBuilder(
-      listenable: _controller,
-      builder: (context, _) {
-        final bool isDeveloper = widget.studentId == "2061";
-
-        return Scaffold(
-          backgroundColor: Colors.grey[100],
-          appBar: AppBar(
-            title: Text(
-              isDeveloper ? '👑 MASTER CONTROL' : '🎓 STUDENT PORTAL',
-              style: const TextStyle(
-                fontWeight: FontWeight.bold,
-                letterSpacing: 1.2,
-              ),
-            ),
-            centerTitle: true,
-            backgroundColor: isDeveloper
-                ? Colors.deepPurple[700]
-                : Colors.indigo[700],
-            foregroundColor: Colors.white,
-            elevation: 0,
-            actions: [
-              IconButton(
-                icon: const Icon(Icons.logout_rounded),
-                onPressed: () => Navigator.pushReplacement(
-                  context,
-                  MaterialPageRoute(builder: (context) => const LoginScreen()),
-                ),
-              ),
-            ],
-          ),
-          body: SingleChildScrollView(
-            child: Column(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Container(
-                  width: double.infinity,
-                  padding: const EdgeInsets.symmetric(
-                    horizontal: 24,
-                    vertical: 28,
-                  ),
-                  decoration: BoxDecoration(
-                    color: isDeveloper
-                        ? Colors.deepPurple[700]
-                        : Colors.indigo[700],
-                    borderRadius: const BorderRadius.only(
-                      bottomLeft: Radius.circular(32),
-                      bottomRight: Radius.circular(32),
-                    ),
-                  ),
-                  child: Row(
-                    children: [
-                      Container(
-                        padding: const EdgeInsets.all(4),
-                        decoration: const BoxDecoration(
-                          color: Colors.white,
-                          shape: BoxShape.circle,
-                        ),
-                        child: CircleAvatar(
-                          radius: 30,
-                          backgroundColor: isDeveloper
-                              ? Colors.deepPurple[50]
-                              : Colors.indigo[50],
-                          child: Icon(
-                            isDeveloper
-                                ? Icons.admin_panel_settings_rounded
-                                : Icons.school_rounded,
-                            size: 32,
-                            color: isDeveloper
-                                ? Colors.deepPurple
-                                : Colors.indigo,
-                          ),
-                        ),
-                      ),
-                      const SizedBox(width: 18),
-                      Column(
-                        crossAxisAlignment: CrossAxisAlignment.start,
-                        children: [
-                          Text(
-                            '${widget.studentName} 님',
-                            style: const TextStyle(
-                              fontSize: 22,
-                              fontWeight: FontWeight.bold,
-                              color: Colors.white,
-                            ),
-                          ),
-                          const SizedBox(height: 4),
-                          Text(
-                            isDeveloper
-                                ? '최고 관리 권한 활성화됨'
-                                : '학번: ${widget.studentId} | 인증 완료',
-                            style: TextStyle(
-                              color: Colors.white.withValues(alpha: 0.8),
-                              fontSize: 14,
-                            ),
-                          ),
-                        ],
-                      ),
-                    ],
-                  ),
-                ),
-                const SizedBox(height: 32),
-                Padding(
-                  padding: const EdgeInsets.symmetric(horizontal: 24.0),
-                  child: Row(
-                    children: [
-                      Container(
-                        width: 4,
-                        height: 18,
-                        decoration: BoxDecoration(
-                          color: isDeveloper
-                              ? Colors.deepPurple
-                              : Colors.indigo,
-                          borderRadius: BorderRadius.circular(2),
-                        ),
-                      ),
-                      const SizedBox(width: 10),
-                      const Text(
-                        '스마트 관리 시스템 메뉴',
-                        style: TextStyle(
-                          fontSize: 18,
-                          fontWeight: FontWeight.bold,
-                          color: Colors.black87,
-                        ),
-                      ),
-                    ],
-                  ),
-                ),
-                const SizedBox(height: 16),
-                LayoutBuilder(
-                  builder: (context, constraints) {
-                    // 🖥️ 웹(넓은 화면)은 한 줄에 5개씩, 폰(좁은 화면)은 기존 2개 그대로.
-                    final bool isWide = constraints.maxWidth >= 800;
-                    return Center(
-                      child: ConstrainedBox(
-                        constraints: BoxConstraints(
-                          maxWidth: isWide ? 1300 : 700,
-                        ),
-                        child: Padding(
-                          padding: const EdgeInsets.symmetric(horizontal: 24.0),
-                          child: GridView.count(
-                            shrinkWrap: true,
-                            physics: const NeverScrollableScrollPhysics(),
-                            crossAxisCount: isWide ? 5 : 2,
-                            crossAxisSpacing: 16,
-                            mainAxisSpacing: 16,
-                            childAspectRatio: 0.95,
-                            children: [
-                              // 🆕 [변경 지점] 기기가 일치하면 정상 활성화, 일치하지 않으면 자물쇠Lock 처리
-                              if (isDeveloper || widget.studentId != "2061")
-                                _buildModernCard(
-                                  icon: widget.isDeviceMatched
-                                      ? Icons.contactless_rounded
-                                      : Icons.lock_rounded,
-                                  title: 'NFC 태그',
-                                  subtitle: widget.isDeviceMatched
-                                      ? '출석 및 폰 수거 완료'
-                                      : '⚠️ 본인 인증 기기 전용',
-                                  color: widget.isDeviceMatched
-                                      ? Colors.blue
-                                      : Colors.grey[400]!,
-                                  onTap: widget.isDeviceMatched
-                                      ? () => _openPocketCheckIn(context)
-                                      : () {
-                                          ScaffoldMessenger.of(
-                                            context,
-                                          ).showSnackBar(
-                                            const SnackBar(
-                                              content: Text(
-                                                '🚨 대리 출석 방지를 위해 등록된 본인 스마트폰에서만 출석 가능합니다.',
-                                              ),
-                                            ),
-                                          );
-                                        },
-                                  isActionButton: widget.isDeviceMatched,
-                                  isLoading: _controller.isLoading,
-                                ),
-
-                              // 🆕 [추가 지점] 기기 일치 여부 상관없이 태블릿에서도 누구나 확인 가능한 학교 상황판 카드
-                              _buildModernCard(
-                                icon: Icons.fastfood_rounded,
-                                title: '실시간 학교 상황',
-                                subtitle: '급식실 줄 & 매점 재고 확인',
-                                color: Colors.orange[700]!,
-                                onTap: () {
-                                  ScaffoldMessenger.of(context).showSnackBar(
-                                    const SnackBar(
-                                      content: Text('🍔 실시간 학교 상황 페이지로 이동합니다.'),
-                                    ),
-                                  );
-                                },
-                              ),
-
-                              if (isDeveloper)
-                                _buildModernCard(
-                                  icon: Icons.monitor_heart_rounded,
-                                  title: '실시간 현황',
-                                  subtitle: '교사용 수거 모니터링',
-                                  color: Colors.teal,
-                                  onTap: () => Navigator.push(
-                                    context,
-                                    MaterialPageRoute(
-                                      builder: (context) =>
-                                          const TeacherAttendancePage(),
-                                    ),
-                                  ),
-                                ),
-                              if (isDeveloper)
-                                _buildModernCard(
-                                  icon: Icons.terminal_rounded,
-                                  title: '서버 DB 제어',
-                                  subtitle: '시스템 원격 초기화',
-                                  color: Colors.amber[800]!,
-                                  onTap: () => Navigator.push(
-                                    context,
-                                    MaterialPageRoute(
-                                      builder: (context) =>
-                                          const AdminDashboard(),
-                                    ),
-                                  ),
-                                ),
-                              if (isDeveloper)
-                                _buildModernCard(
-                                  icon: Icons.add_moderator_rounded,
-                                  title: '학생 계정 관리',
-                                  subtitle: 'UUID 리셋 및 승인',
-                                  color: Colors.purple,
-                                  onTap: () => Navigator.push(
-                                    context,
-                                    MaterialPageRoute(
-                                      builder: (context) =>
-                                          const TeacherStudentManagementPage(),
-                                    ),
-                                  ),
-                                ),
-                              if (isDeveloper)
-                                _buildModernCard(
-                                  icon: Icons.delete_sweep_rounded,
-                                  title: '계정 강제 삭제',
-                                  subtitle: '학생 및 교사 DB 삭제',
-                                  color: Colors.red[600]!,
-                                  onTap: () => _showDeleteUserDialog(context),
-                                ),
-                              if (isDeveloper)
-                                _buildModernCard(
-                                  icon: Icons.edit_note_rounded,
-                                  title: 'NFC 태그 쓰기',
-                                  subtitle: '주머니 스티커 초기 설정',
-                                  color: Colors.deepPurple,
-                                  onTap: () => Navigator.push(
-                                    context,
-                                    MaterialPageRoute(
-                                      builder: (context) =>
-                                          const NfcTagWriterScreen(),
-                                    ),
-                                  ),
-                                ),
-                            ],
-                          ),
-                        ),
-                      ),
-                    );
-                  },
-                ),
-                const SizedBox(height: 32),
-              ],
-            ),
-          ),
-        );
-      },
-    );
-  }
-
-  // 5️⃣ [카드 디자인 위젯] - 기존 형태 완전 보존
-  Widget _buildModernCard({
-    required IconData icon,
-    required String title,
-    required String subtitle,
-    required Color color,
-    required VoidCallback onTap,
-    bool isActionButton = false,
-    bool isLoading = false,
-  }) {
-    return InkWell(
-      onTap: isLoading ? null : onTap,
-      borderRadius: BorderRadius.circular(24),
-      child: Ink(
-        padding: const EdgeInsets.all(20),
-        decoration: BoxDecoration(
-          color: Colors.white,
-          borderRadius: BorderRadius.circular(24),
-          boxShadow: [
-            BoxShadow(
-              color: Colors.black.withValues(alpha: 0.04),
-              blurRadius: 16,
-              offset: const Offset(0, 4),
-            ),
-          ],
-        ),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          mainAxisAlignment: MainAxisAlignment.spaceBetween,
-          children: [
-            Container(
-              padding: const EdgeInsets.all(12),
-              decoration: BoxDecoration(
-                color: color.withValues(alpha: 0.1),
-                borderRadius: BorderRadius.circular(16),
-              ),
-              child: Icon(icon, color: color, size: 28),
-            ),
-            Column(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Row(
-                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                  children: [
-                    Text(
-                      title,
-                      style: const TextStyle(
-                        fontSize: 16,
-                        fontWeight: FontWeight.bold,
-                        color: Colors.black87,
-                      ),
-                    ),
-                    if (isLoading)
-                      const SizedBox(
-                        width: 16,
-                        height: 16,
-                        child: CircularProgressIndicator(strokeWidth: 2),
-                      )
-                    else if (isActionButton)
-                      Icon(
-                        Icons.touch_app_rounded,
-                        size: 16,
-                        color: color.withValues(alpha: 0.5),
-                      ),
-                  ],
-                ),
-                const SizedBox(height: 4),
-                Text(
-                  subtitle,
-                  style: TextStyle(
-                    fontSize: 12,
-                    color: Colors.grey[500],
-                    height: 1.2,
-                  ),
-                ),
-              ],
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-}

lib/ui/teacher_attendance_page.dart

@@ -2,6 +2,7 @@
 // 서버 통신·상태·파생 로직은 lib/function/teacher_attendance_controller.dart가 담당한다.
 import 'package:flutter/material.dart';
 import '../function/teacher_attendance_controller.dart';
+import '../theme/app_palette.dart';
 
 // -----------------------------------------------------------------------------
 // 📅 [서브 화면 1] 실시간 출석 확인 란 (StudentDashboard 카드 스타일 리스트화)
@@ -62,7 +63,7 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
     showDialog(
       context: context,
       builder: (context) => AlertDialog(
-        title: const Text('🧪 테스트용 허용시간 초기화'),
+        title: const Text('테스트용 허용시간 초기화'),
         content: const Text(
           '하교 처리나 반출 허용 시간 설정으로 켜져 있는 모든 허용 시간대를 지금 즉시 해제합니다.\n'
           '(무단반출 감지 테스트할 때만 사용하세요)',
@@ -125,7 +126,7 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
     showDialog(
       context: context,
       builder: (context) => AlertDialog(
-        title: const Text('⏰ 전체 학생 반출 허용 시간 설정'),
+        title: const Text('전체 학생 반출 허용 시간 설정'),
         content: Column(
           mainAxisSize: MainAxisSize.min,
           crossAxisAlignment: CrossAxisAlignment.start,
@@ -168,7 +169,7 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
     showDialog(
       context: context,
       builder: (context) => AlertDialog(
-        title: const Text('🏫 하교 처리'),
+        title: const Text('하교 처리'),
         content: const Text(
           '지금부터 모든 학생의 반출이 자동으로 허용되며, 더 이상 무단반출 경고가 뜨지 않습니다.\n하교 처리하시겠습니까?',
         ),
@@ -202,13 +203,13 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
         final int absentCount = totalCount - checkedInCount;
 
         return Scaffold(
-          backgroundColor: Colors.grey[100],
+          backgroundColor: AppPalette.mist,
           appBar: AppBar(
             title: const Text(
-              '📋 실시간 출석 현황',
+              '실시간 출석 현황',
               style: TextStyle(fontWeight: FontWeight.bold),
             ),
-            backgroundColor: Colors.blue,
+            backgroundColor: AppPalette.ink,
             foregroundColor: Colors.white,
             elevation: 0,
             actions: [
@@ -260,7 +261,7 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
                   Icons.bug_report_outlined,
                   color: Colors.white70,
                 ),
-                tooltip: '🧪 테스트용: 허용시간 초기화',
+                tooltip: '테스트용: 허용시간 초기화',
               ),
               const SizedBox(width: 8),
             ],
@@ -336,7 +337,7 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
                     width: 4,
                     height: 16,
                     decoration: BoxDecoration(
-                      color: Colors.blue,
+                      color: AppPalette.ink,
                       borderRadius: BorderRadius.circular(2),
                     ),
                   ),
@@ -346,7 +347,7 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
                     style: const TextStyle(
                       fontSize: 16,
                       fontWeight: FontWeight.bold,
-                      color: Colors.black87,
+                      color: AppPalette.ink,
                     ),
                   ),
                   const SizedBox(width: 6),
@@ -386,9 +387,9 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
         ? Colors.red
         : (isPending ? Colors.orange : (isComplete ? Colors.blue : Colors.red));
     final String statusLine = hasViolation
-        ? '🚨 무단반출 (${student['violationTime']})'
+        ? '무단반출 (${student['violationTime']})'
         : (isPending
-              ? '⏳ 미완료 (${student['checkInTime']})'
+              ? '미완료 (${student['checkInTime']})'
               : (isComplete
                     ? '${student['checkInTime']}'
                     : (student['hasEverCheckedIn'] == true ? '미제출' : '미등록')));
@@ -396,11 +397,12 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
     return Container(
       padding: const EdgeInsets.all(14),
       decoration: BoxDecoration(
-        color: hasViolation ? Colors.red[50] : Colors.white,
+        color: hasViolation ? Colors.red[50] : AppPalette.paper,
         borderRadius: BorderRadius.circular(20),
-        border: hasViolation
-            ? Border.all(color: Colors.red[300]!, width: 1.5)
-            : null,
+        border: Border.all(
+          color: hasViolation ? Colors.red[300]! : AppPalette.sage,
+          width: hasViolation ? 1.5 : 1,
+        ),
         boxShadow: [
           BoxShadow(
             color: Colors.black.withValues(alpha: 0.03),
@@ -440,15 +442,15 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
                     vertical: 3,
                   ),
                   decoration: BoxDecoration(
-                    color: Colors.blue.shade50,
+                    color: AppPalette.linen,
                     borderRadius: BorderRadius.circular(20),
-                    border: Border.all(color: Colors.blue.shade200),
+                    border: Border.all(color: AppPalette.sage),
                   ),
                   child: Text(
                     student['pocketNumber'],
                     style: const TextStyle(
                       fontWeight: FontWeight.bold,
-                      color: Colors.blueAccent,
+                      color: AppPalette.ink,
                       fontSize: 11,
                     ),
                   ),
@@ -590,7 +592,7 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
     return Container(
       padding: const EdgeInsets.all(20),
       decoration: BoxDecoration(
-        color: Colors.white,
+        color: AppPalette.paper,
         borderRadius: BorderRadius.circular(16),
         boxShadow: [
           BoxShadow(
@@ -639,7 +641,7 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
     return Container(
       width: double.infinity,
       padding: const EdgeInsets.all(16),
-      color: const Color(0xFF1E293B),
+      color: AppPalette.ink,
       child: Row(
         mainAxisAlignment: MainAxisAlignment.spaceAround,
         children: [
@@ -689,7 +691,7 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
           const SizedBox(width: 8),
           Expanded(
             child: Text(
-              '🔓 지금 전체 반출 허용 중입니다 ($until 까지) — 이 시간 동안은 무단반출 경고가 뜨지 않아요.',
+              '지금 전체 반출 허용 중입니다 ($until 까지) — 이 시간 동안은 무단반출 경고가 뜨지 않아요.',
               style: TextStyle(
                 color: Colors.amber[900],
                 fontWeight: FontWeight.bold,
@@ -719,12 +721,12 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
                 onSelected: (_) => _controller.setFilter("ALL"),
               ),
               FilterChip(
-                label: const Text("🟢 출석자"),
+                label: const Text("출석자"),
                 selected: _controller.filterType == "CHECKED_IN",
                 onSelected: (_) => _controller.setFilter("CHECKED_IN"),
               ),
               FilterChip(
-                label: const Text("🔴 미출석자"),
+                label: const Text("미출석자"),
                 selected: _controller.filterType == "ABSENT",
                 onSelected: (_) => _controller.setFilter("ABSENT"),
               ),

lib/ui/teacher_dashboard.dart

@@ -1,273 +0,0 @@
-// 👨‍🏫 교사 대시보드. 실시간 출석 확인, 학생 계정 관리 화면으로 가는 메뉴만 담당한다.
-import 'package:flutter/material.dart';
-import 'login_screen.dart';
-import 'teacher_attendance_page.dart';
-import 'teacher_student_management_page.dart';
-
-// ==========================================
-// 👨‍🏫 4. 선생님 대시보드 (기존 3초 타이머 완벽 유지)
-// ==========================================
-class TeacherDashboard extends StatefulWidget {
-  final String? teacherId;
-  final String? teacherName;
-
-  const TeacherDashboard({super.key, this.teacherId, this.teacherName});
-
-  @override
-  State<TeacherDashboard> createState() => _TeacherDashboardState();
-}
-
-class _TeacherDashboardState extends State<TeacherDashboard> {
-  // 🧼 [수정] 사용하지 않던 _isLoading 변수를 삭제하여 경고를 완벽히 해결했습니다!
-
-  @override
-  Widget build(BuildContext context) {
-    // 다른 화면에서 null이 넘어왔을 때를 대비한 안전망 방탄 코드
-    final String displayName = widget.teacherName ?? "간편인증 선생";
-    final String displayId = widget.teacherId ?? "간편인증";
-
-    return Scaffold(
-      backgroundColor: Colors.grey[100],
-      appBar: AppBar(
-        title: const Text(
-          '👨‍🏫 TEACHER PORTAL',
-          style: TextStyle(fontWeight: FontWeight.bold, letterSpacing: 1.2),
-        ),
-        centerTitle: true,
-        backgroundColor: Colors.green[700], // 교사 전용 그린 테마 컬러
-        foregroundColor: Colors.white,
-        elevation: 0,
-        actions: [
-          IconButton(
-            icon: const Icon(Icons.logout_rounded),
-            onPressed: () => Navigator.pushReplacement(
-              context,
-              MaterialPageRoute(builder: (context) => const LoginScreen()),
-            ),
-          ),
-        ],
-      ),
-      body: SingleChildScrollView(
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            // 💳 [상단 배너 가이드] StudentDashboard와 100% 일치하는 프로필 카드 레이아웃
-            Container(
-              width: double.infinity,
-              padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 28),
-              decoration: BoxDecoration(
-                color: Colors.green[700],
-                borderRadius: const BorderRadius.only(
-                  bottomLeft: Radius.circular(32),
-                  bottomRight: Radius.circular(32),
-                ),
-              ),
-              child: Row(
-                children: [
-                  Container(
-                    padding: const EdgeInsets.all(4),
-                    decoration: const BoxDecoration(
-                      color: Colors.white,
-                      shape: BoxShape.circle,
-                    ),
-                    child: CircleAvatar(
-                      radius: 30,
-                      backgroundColor: Colors.green[50],
-                      child: Icon(
-                        Icons.admin_panel_settings_rounded,
-                        size: 32,
-                        color: Colors.green[700],
-                      ),
-                    ),
-                  ),
-                  const SizedBox(width: 18),
-                  Column(
-                    crossAxisAlignment: CrossAxisAlignment.start,
-                    children: [
-                      Text(
-                        '$displayName 님',
-                        style: const TextStyle(
-                          fontSize: 22,
-                          fontWeight: FontWeight.bold,
-                          color: Colors.white,
-                        ),
-                      ),
-                      const SizedBox(height: 4),
-                      Text(
-                        '교직원 번호: $displayId | 교사 권한 활성화됨',
-                        style: TextStyle(
-                          color: Colors.white.withValues(alpha: 0.8),
-                          fontSize: 14,
-                        ),
-                      ),
-                    ],
-                  ),
-                ],
-              ),
-            ),
-            const SizedBox(height: 32),
-
-            // 🏷️ [세로 바 타이틀 인디케이터] 구조 일치화
-            Padding(
-              padding: const EdgeInsets.symmetric(horizontal: 24.0),
-              child: Row(
-                children: [
-                  Container(
-                    width: 4,
-                    height: 18,
-                    decoration: BoxDecoration(
-                      color: Colors.green[700],
-                      borderRadius: BorderRadius.circular(2),
-                    ),
-                  ),
-                  const SizedBox(width: 10),
-                  const Text(
-                    '스마트 교사용 관리 메뉴',
-                    style: TextStyle(
-                      fontSize: 18,
-                      fontWeight: FontWeight.bold,
-                      color: Colors.black87,
-                    ),
-                  ),
-                ],
-              ),
-            ),
-            const SizedBox(height: 16),
-
-            // 📊 [그리드 레이아웃 메뉴] 시후의 카드 컴포넌트 스타일 적용
-            // 🖥️ 데스크톱 브라우저에서 카드가 지나치게 커지지 않도록 최대 너비를 제한한다.
-            Center(
-              child: ConstrainedBox(
-                constraints: const BoxConstraints(maxWidth: 700),
-                child: Padding(
-                  padding: const EdgeInsets.symmetric(horizontal: 24.0),
-                  child: GridView.count(
-                    shrinkWrap: true,
-                    physics: const NeverScrollableScrollPhysics(),
-                    crossAxisCount: 2,
-                    crossAxisSpacing: 16,
-                    mainAxisSpacing: 16,
-                    childAspectRatio: 0.95,
-                    children: [
-                  _buildModernCard(
-                    icon: Icons.assignment_turned_in_rounded,
-                    title: '실시간 출석 확인',
-                    subtitle: '학생 제출 로그 모니터링',
-                    color: Colors.blue,
-                    onTap: () => Navigator.push(
-                      context,
-                      MaterialPageRoute(
-                        builder: (context) => const TeacherAttendancePage(),
-                      ),
-                    ),
-                  ),
-                  _buildModernCard(
-                    icon: Icons.manage_accounts_rounded,
-                    title: '학생 계정 관리',
-                    subtitle: '계정 추가 및 강제 리셋',
-                    color: Colors.orange,
-                    onTap: () => Navigator.push(
-                      context,
-                      MaterialPageRoute(
-                        builder: (context) =>
-                            const TeacherStudentManagementPage(),
-                      ),
-                    ),
-                  ),
-                    ],
-                  ),
-                ),
-              ),
-            ),
-            const SizedBox(height: 32),
-          ],
-        ),
-      ),
-    );
-  }
-
-  // 💎 [시후 대시보드 전용 카드 위젯 이식 완료]
-  Widget _buildModernCard({
-    required IconData icon,
-    required String title,
-    required String subtitle,
-    required Color color,
-    required VoidCallback onTap,
-    bool isActionButton = false,
-    bool isLoading = false,
-  }) {
-    return InkWell(
-      onTap: isLoading ? null : onTap,
-      borderRadius: BorderRadius.circular(24),
-      child: Ink(
-        padding: const EdgeInsets.all(20),
-        decoration: BoxDecoration(
-          color: Colors.white,
-          borderRadius: BorderRadius.circular(24),
-          boxShadow: [
-            BoxShadow(
-              color: Colors.black.withValues(alpha: 0.04),
-              blurRadius: 16,
-              offset: const Offset(0, 4),
-            ),
-          ],
-        ),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          mainAxisAlignment: MainAxisAlignment.spaceBetween,
-          children: [
-            Container(
-              padding: const EdgeInsets.all(12),
-              decoration: BoxDecoration(
-                color: color.withValues(alpha: 0.1),
-                borderRadius: BorderRadius.circular(16),
-              ),
-              child: Icon(icon, color: color, size: 28),
-            ),
-            Column(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Row(
-                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                  children: [
-                    Expanded(
-                      child: Text(
-                        title,
-                        style: const TextStyle(
-                          fontSize: 15,
-                          fontWeight: FontWeight.bold,
-                          color: Colors.black87,
-                        ),
-                      ),
-                    ),
-                    if (isLoading)
-                      const SizedBox(
-                        width: 16,
-                        height: 16,
-                        child: CircularProgressIndicator(strokeWidth: 2),
-                      )
-                    else if (isActionButton)
-                      Icon(
-                        Icons.touch_app_rounded,
-                        size: 16,
-                        color: color.withValues(alpha: 0.5),
-                      ),
-                  ],
-                ),
-                const SizedBox(height: 4),
-                Text(
-                  subtitle,
-                  style: TextStyle(
-                    fontSize: 12,
-                    color: Colors.grey[500],
-                    height: 1.2,
-                  ),
-                ),
-              ],
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-}

lib/ui/teacher_register_screen.dart

@@ -2,6 +2,7 @@
 // lib/function/teacher_register_controller.dart가 담당한다.
 import 'package:flutter/material.dart';
 import '../function/teacher_register_controller.dart';
+import '../theme/app_palette.dart';
 
 class TeacherRegisterScreen extends StatefulWidget {
   const TeacherRegisterScreen({super.key});
@@ -36,7 +37,7 @@ class _TeacherRegisterScreenState extends State<TeacherRegisterScreen> {
     if (id.isEmpty || pw.isEmpty || name.isEmpty || secret.isEmpty) {
       ScaffoldMessenger.of(
         context,
-      ).showSnackBar(const SnackBar(content: Text('⚠️ 모든 빈칸을 입력해 주세요.')));
+      ).showSnackBar(const SnackBar(content: Text('모든 빈칸을 입력해 주세요.')));
       return;
     }
 
@@ -61,10 +62,11 @@ class _TeacherRegisterScreenState extends State<TeacherRegisterScreen> {
       listenable: _controller,
       builder: (context, _) {
         return Scaffold(
+          backgroundColor: AppPalette.mist,
           appBar: AppBar(
             title: const Text('교사 회원가입'),
-            backgroundColor: Colors.indigo,
-            foregroundColor: Colors.white,
+            backgroundColor: AppPalette.ink,
+            foregroundColor: AppPalette.paper,
           ),
           body: SingleChildScrollView(
             padding: const EdgeInsets.all(24.0),
@@ -72,7 +74,7 @@ class _TeacherRegisterScreenState extends State<TeacherRegisterScreen> {
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
                 const Text(
-                  '👨‍🏫 교직원 전용 인증',
+                  '교직원 전용 인증',
                   style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
                 ),
                 const SizedBox(height: 4),
@@ -85,7 +87,7 @@ class _TeacherRegisterScreenState extends State<TeacherRegisterScreen> {
                   controller: _secretController,
                   obscureText: true,
                   decoration: const InputDecoration(
-                    labelText: '🔑 교사 인증 비밀코드 입력',
+                    labelText: '교사 인증 비밀코드 입력',
                     border: OutlineInputBorder(),
                   ),
                 ),
@@ -122,8 +124,8 @@ class _TeacherRegisterScreenState extends State<TeacherRegisterScreen> {
                   height: 50,
                   child: ElevatedButton(
                     style: ElevatedButton.styleFrom(
-                      backgroundColor: Colors.indigo,
-                      foregroundColor: Colors.white,
+                      backgroundColor: AppPalette.ink,
+                      foregroundColor: AppPalette.paper,
                     ),
                     onPressed: _controller.isLoading ? null : _registerTeacher,
                     child: _controller.isLoading

lib/ui/teacher_student_management_page.dart

@@ -5,6 +5,11 @@ 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';
+import '../theme/app_palette.dart';
+
+// 📐 "실시간 출석 확인" 목록(teacher_attendance_page.dart)의 타일 규격과 동일하게 맞춘다.
+const double kAttendanceTileWidth = 220;
+const double kAttendanceTileHeight = 148;
 
 // -----------------------------------------------------------------------------
 // 👥 [서브 화면 2] 학생 계정 관리 란 (추가 양식 폼 + 강제 삭제 다이얼로그 완전 내장)
@@ -23,7 +28,6 @@ class _TeacherStudentManagementPageState
       TeacherStudentManagementController();
   final TextEditingController _addIdController = TextEditingController();
   final TextEditingController _addNameController = TextEditingController();
-  final TextEditingController _addPwController = TextEditingController();
   int? _selectedGrade;
   bool _isDragging = false;
 
@@ -38,34 +42,31 @@ class _TeacherStudentManagementPageState
     _controller.dispose();
     _addIdController.dispose();
     _addNameController.dispose();
-    _addPwController.dispose();
     super.dispose();
   }
 
-  // ➕ [학생 추가 버튼 동작]
+  // ➕ [학생 추가 버튼 동작] 기본 비밀번호는 항상 1234로 고정.
   Future<void> _addStudentAccount() async {
     final sId = _addIdController.text.trim();
     final sName = _addNameController.text.trim();
-    final sPw = _addPwController.text.trim();
 
-    if (sId.isEmpty || sName.isEmpty || sPw.isEmpty) {
+    if (sId.isEmpty || sName.isEmpty) {
       ScaffoldMessenger.of(
         context,
-      ).showSnackBar(const SnackBar(content: Text('⚠️ 모든 입력란을 채워주세요.')));
+      ).showSnackBar(const SnackBar(content: Text('모든 입력란을 채워주세요.')));
       return;
     }
 
     final (success, message) = await _controller.addStudentAccount(
       studentId: sId,
       name: sName,
-      password: sPw,
+      password: '1234',
       grade: _selectedGrade,
     );
     if (!mounted) return;
     if (success) {
       _addIdController.clear();
       _addNameController.clear();
-      _addPwController.clear();
       setState(() => _selectedGrade = null);
     }
     ScaffoldMessenger.of(
@@ -90,15 +91,13 @@ class _TeacherStudentManagementPageState
       if (!mounted) return;
       ScaffoldMessenger.of(
         context,
-      ).showSnackBar(SnackBar(content: Text('❌ 엑셀 파일을 읽는 데 실패했습니다: $e')));
+      ).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)'),
-        ),
+        const SnackBar(content: Text('유효한 학생 데이터를 찾지 못했습니다. (1행은 머리글로 건너뜁니다)')),
       );
       return;
     }
@@ -111,7 +110,7 @@ class _TeacherStudentManagementPageState
       context: context,
       builder: (context) => AlertDialog(
         shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(24)),
-        title: Text('📄 ${rows.length}명 확인됨'),
+        title: Text('${rows.length}명 확인됨'),
         content: SizedBox(
           width: 400,
           child: Column(
@@ -162,8 +161,8 @@ class _TeacherStudentManagementPageState
               _runBulkImport(rows);
             },
             style: ElevatedButton.styleFrom(
-              backgroundColor: Colors.orange,
-              foregroundColor: Colors.white,
+              backgroundColor: AppPalette.ink,
+              foregroundColor: AppPalette.paper,
               shape: RoundedRectangleBorder(
                 borderRadius: BorderRadius.circular(12),
               ),
@@ -208,9 +207,7 @@ class _TeacherStudentManagementPageState
       context: context,
       builder: (context) => AlertDialog(
         shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(24)),
-        title: Text(
-          result.failures.isEmpty ? '✅ 일괄 등록 완료' : '⚠️ 일괄 등록 완료 (일부 실패)',
-        ),
+        title: Text(result.failures.isEmpty ? '일괄 등록 완료' : '일괄 등록 완료 (일부 실패)'),
         content: SizedBox(
           width: 400,
           child: Column(
@@ -294,8 +291,8 @@ class _TeacherStudentManagementPageState
       context: context,
       builder: (ctx) => AlertDialog(
         title: const Text(
-          '⚠️ 기기 등록 초기화',
-          style: TextStyle(fontWeight: FontWeight.bold, color: Colors.purple),
+          '기기 등록 초기화',
+          style: TextStyle(fontWeight: FontWeight.bold, color: AppPalette.ink),
         ),
         content: Text('$studentName 학생의 스마트폰 기기 등록과 비밀번호(1234)를 초기화하시겠습니까?'),
         actions: [
@@ -305,8 +302,8 @@ class _TeacherStudentManagementPageState
           ),
           ElevatedButton(
             style: ElevatedButton.styleFrom(
-              backgroundColor: Colors.purple,
-              foregroundColor: Colors.white,
+              backgroundColor: AppPalette.ink,
+              foregroundColor: AppPalette.paper,
             ),
             onPressed: () async {
               Navigator.pop(ctx);
@@ -372,56 +369,37 @@ class _TeacherStudentManagementPageState
     );
   }
 
-  @override
-  Widget build(BuildContext context) {
-    return ListenableBuilder(
-      listenable: _controller,
-      builder: (context, _) {
-        return Scaffold(
-          backgroundColor: Colors.grey[100],
-          appBar: AppBar(
-            title: const Text(
-              '⚙️ 학생 통합 관리 센터',
-              style: TextStyle(fontWeight: FontWeight.bold),
-            ),
-            backgroundColor: Colors.orange,
-            foregroundColor: Colors.white,
-            elevation: 0,
-          ),
-          body: SingleChildScrollView(
-            padding: const EdgeInsets.all(24.0),
-            child: Column(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                // 🏷️ 인디케이터 바 1 (추가 메뉴)
-                Row(
+  // 🏷️ 섹션 제목 (색 인디케이터 바 + 텍스트).
+  Widget _sectionTitle(String text, {Color color = AppPalette.ink}) {
+    return Row(
       children: [
         Container(
           width: 4,
           height: 16,
           decoration: BoxDecoration(
-                        color: Colors.orange,
+            color: color,
             borderRadius: BorderRadius.circular(2),
           ),
         ),
         const SizedBox(width: 8),
-                    const Text(
-                      '신규 학생 계정 추가',
-                      style: TextStyle(
-                        fontSize: 18,
-                        fontWeight: FontWeight.bold,
-                      ),
+        Text(
+          text,
+          style: const TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
         ),
       ],
-                ),
-                const SizedBox(height: 16),
+    );
+  }
 
-                // 📝 학생 추가 컨테이너 폼
-                Container(
-                  padding: const EdgeInsets.all(20),
+  // 📝 [정사각형 박스 1] 신규 학생 계정 추가 폼. 박스가 작아도 버튼까지 다 보이도록 촘촘하게 배치.
+  Widget _buildAddAccountBox() {
+    const InputDecoration Function(String, IconData) fieldDecoration =
+        _compactFieldDecoration;
+    return Container(
+      padding: const EdgeInsets.all(10),
       decoration: BoxDecoration(
-                    color: Colors.white,
+        color: AppPalette.paper,
         borderRadius: BorderRadius.circular(24),
+        border: Border.all(color: AppPalette.sage),
         boxShadow: [
           BoxShadow(
             color: Colors.black.withValues(alpha: 0.04),
@@ -429,72 +407,76 @@ class _TeacherStudentManagementPageState
           ),
         ],
       ),
+      child: SingleChildScrollView(
         child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
           children: [
             TextField(
               controller: _addIdController,
               keyboardType: TextInputType.number,
-                        decoration: const InputDecoration(
-                          labelText: '학번',
-                          prefixIcon: Icon(Icons.badge),
+              style: const TextStyle(fontSize: 12),
+              decoration: fieldDecoration('학번', Icons.badge),
             ),
-                      ),
-                      const SizedBox(height: 12),
+            const SizedBox(height: 4),
             TextField(
               controller: _addNameController,
-                        decoration: const InputDecoration(
-                          labelText: '이름',
-                          prefixIcon: Icon(Icons.person),
+              style: const TextStyle(fontSize: 12),
+              decoration: fieldDecoration('이름', Icons.person),
+            ),
+            const SizedBox(height: 4),
+            const Padding(
+              padding: EdgeInsets.symmetric(horizontal: 4),
+              child: Row(
+                children: [
+                  Icon(Icons.lock, size: 14, color: Colors.grey),
+                  SizedBox(width: 6),
+                  Text(
+                    '초기 비밀번호: 1234 (고정)',
+                    style: TextStyle(fontSize: 11, color: Colors.grey),
+                  ),
+                ],
               ),
             ),
-                      const SizedBox(height: 12),
-                      TextField(
-                        controller: _addPwController,
-                        obscureText: true,
-                        decoration: const InputDecoration(
-                          labelText: '초기 비밀번호',
-                          prefixIcon: Icon(Icons.lock),
-                        ),
-                      ),
-                      const SizedBox(height: 12),
+            const SizedBox(height: 4),
             DropdownButtonFormField<int>(
               initialValue: _selectedGrade,
-                        decoration: const InputDecoration(
-                          labelText: '학년 (선택)',
-                          prefixIcon: Icon(Icons.class_),
-                        ),
+              style: const TextStyle(fontSize: 12, color: Colors.black87),
+              decoration: fieldDecoration('학년 (선택)', Icons.class_),
               items: const [
                 DropdownMenuItem(value: 1, child: Text('1학년')),
                 DropdownMenuItem(value: 2, child: Text('2학년')),
                 DropdownMenuItem(value: 3, child: Text('3학년')),
               ],
-                        onChanged: (value) =>
-                            setState(() => _selectedGrade = value),
+              onChanged: (value) => setState(() => _selectedGrade = value),
             ),
-                      const SizedBox(height: 20),
+            const SizedBox(height: 6),
             SizedBox(
               width: double.infinity,
-                        height: 50,
+              height: 30,
               child: ElevatedButton(
-                          onPressed: _controller.isWorking
-                              ? null
-                              : _addStudentAccount,
+                onPressed: _controller.isWorking ? null : _addStudentAccount,
                 style: ElevatedButton.styleFrom(
-                            backgroundColor: Colors.orange,
-                            foregroundColor: Colors.white,
+                  backgroundColor: AppPalette.ink,
+                  foregroundColor: AppPalette.paper,
+                  padding: EdgeInsets.zero,
                   shape: RoundedRectangleBorder(
-                              borderRadius: BorderRadius.circular(12),
+                    borderRadius: BorderRadius.circular(10),
                   ),
                 ),
                 child: _controller.isWorking
-                              ? const CircularProgressIndicator(
+                    ? const SizedBox(
+                        width: 16,
+                        height: 16,
+                        child: CircularProgressIndicator(
                           color: Colors.white,
+                          strokeWidth: 2,
+                        ),
                       )
                     : const Text(
                         '학생 등록 완료',
                         style: TextStyle(
                           fontWeight: FontWeight.bold,
-                                    fontSize: 15,
+                          fontSize: 12,
                         ),
                       ),
               ),
@@ -502,32 +484,22 @@ 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),
+  static InputDecoration _compactFieldDecoration(String label, IconData icon) {
+    return InputDecoration(
+      labelText: label,
+      labelStyle: const TextStyle(fontSize: 12),
+      prefixIcon: Icon(icon, size: 16),
+      isDense: true,
+      contentPadding: const EdgeInsets.symmetric(vertical: 4, horizontal: 8),
+    );
+  }
 
-                DropTarget(
+  // 📤 [정사각형 박스 2] 엑셀 일괄 등록 드롭존.
+  Widget _buildExcelBox() {
+    return DropTarget(
       onDragEntered: (_) => setState(() => _isDragging = true),
       onDragExited: (_) => setState(() => _isDragging = false),
       onDragDone: (details) async {
@@ -542,71 +514,240 @@ class _TeacherStudentManagementPageState
         borderRadius: BorderRadius.circular(24),
         child: Container(
           width: double.infinity,
-                      padding: const EdgeInsets.symmetric(vertical: 28),
+          height: double.infinity,
+          padding: const EdgeInsets.all(20),
           decoration: BoxDecoration(
-                        color: _isDragging ? Colors.orange[50] : Colors.white,
+            color: _isDragging ? Colors.orange[50] : AppPalette.paper,
             borderRadius: BorderRadius.circular(24),
             border: Border.all(
-                          color: _isDragging
-                              ? Colors.orange
-                              : Colors.grey.shade300,
+              color: _isDragging ? Colors.orange : AppPalette.sage,
               width: _isDragging ? 2 : 1,
             ),
           ),
           child: Column(
+            mainAxisAlignment: MainAxisAlignment.center,
             children: [
               Icon(
                 Icons.upload_file_rounded,
                 size: 40,
-                            color: _isDragging
-                                ? Colors.orange
-                                : Colors.grey[400],
+                color: _isDragging ? Colors.orange : AppPalette.sage,
               ),
               const SizedBox(height: 12),
               Text(
                 _isDragging ? '여기에 놓으세요' : '엑셀 파일을 드래그하거나 눌러서 선택',
+                textAlign: TextAlign.center,
                 style: TextStyle(
                   fontWeight: FontWeight.bold,
-                              color: _isDragging
-                                  ? Colors.orange[800]
-                                  : Colors.black87,
+                  color: _isDragging ? Colors.orange[800] : AppPalette.ink,
                 ),
               ),
               const SizedBox(height: 4),
               Text(
                 '.xlsx · 1행은 머리글, A열=학번 B열=이름 C열=학년(선택)',
-                            style: TextStyle(
-                              fontSize: 12,
-                              color: Colors.grey[500],
-                            ),
+                style: TextStyle(fontSize: 12, color: Colors.grey[500]),
                 textAlign: TextAlign.center,
               ),
             ],
           ),
         ),
       ),
+    );
+  }
+
+  // 🧑‍🎓 [학생 목록 타일] 아이콘/이름/상태/액션을 모두 중앙 정렬한 정사각 타일.
+  Widget _buildStudentTile(Map<String, dynamic> student) {
+    final String studentId = student['id'].toString();
+    final String studentName = student['name'].toString();
+    final int? grade = student['grade'] as int?;
+    final bool needsReset = student['device'] == '초기화 필요';
+
+    return Container(
+      padding: const EdgeInsets.all(14),
+      decoration: BoxDecoration(
+        color: AppPalette.paper,
+        borderRadius: BorderRadius.circular(20),
+        border: Border.all(color: AppPalette.sage),
+        boxShadow: [
+          BoxShadow(
+            color: Colors.black.withValues(alpha: 0.03),
+            blurRadius: 12,
+            offset: const Offset(0, 4),
+          ),
+        ],
+      ),
+      child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        crossAxisAlignment: CrossAxisAlignment.center,
+        children: [
+          Container(
+            padding: const EdgeInsets.all(8),
+            decoration: BoxDecoration(
+              color: needsReset
+                  ? Colors.red.withValues(alpha: 0.1)
+                  : AppPalette.linen,
+              shape: BoxShape.circle,
+            ),
+            child: Icon(
+              needsReset ? Icons.lock_reset : Icons.person,
+              size: 18,
+              color: needsReset ? Colors.red : AppPalette.ink,
+            ),
+          ),
+          const SizedBox(height: 8),
+          Text(
+            '$studentName ($studentId)',
+            textAlign: TextAlign.center,
+            maxLines: 1,
+            overflow: TextOverflow.ellipsis,
+            style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 15),
+          ),
+          const SizedBox(height: 4),
+          Text(
+            needsReset ? '초기화 대기중' : '정상 등록',
+            textAlign: TextAlign.center,
+            style: TextStyle(
+              fontSize: 11.5,
+              color: needsReset ? Colors.red[700] : Colors.grey[600],
+              fontWeight: needsReset ? FontWeight.bold : FontWeight.normal,
+            ),
+          ),
+          const SizedBox(height: 6),
+          Wrap(
+            alignment: WrapAlignment.center,
+            spacing: 2,
+            runSpacing: 2,
+            children: [
+              Builder(
+                builder: (chipContext) => ActionChip(
+                  visualDensity: VisualDensity.compact,
+                  materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
+                  labelPadding: const EdgeInsets.symmetric(horizontal: 6),
+                  label: Text(
+                    grade != null ? '$grade학년' : '미배정',
+                    style: const TextStyle(fontSize: 11),
+                  ),
+                  onPressed: () => _showGradeMenu(
+                    chipContext,
+                    studentId,
+                    studentName,
+                    grade,
+                  ),
+                ),
+              ),
+              IconButton(
+                icon: const Icon(
+                  Icons.lock_reset,
+                  color: AppPalette.ink,
+                  size: 18,
+                ),
+                tooltip: '기기 리셋',
+                padding: EdgeInsets.zero,
+                constraints: const BoxConstraints(minWidth: 28, minHeight: 28),
+                onPressed: () => _confirmResetDevice(studentId, studentName),
+              ),
+              IconButton(
+                icon: const Icon(
+                  Icons.delete_forever_rounded,
+                  color: Colors.redAccent,
+                  size: 18,
+                ),
+                tooltip: '계정 영구 삭제',
+                padding: EdgeInsets.zero,
+                constraints: const BoxConstraints(minWidth: 28, minHeight: 28),
+                onPressed: () => _confirmDeleteStudent(studentId, studentName),
+              ),
+            ],
+          ),
+        ],
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return ListenableBuilder(
+      listenable: _controller,
+      builder: (context, _) {
+        return Scaffold(
+          backgroundColor: AppPalette.mist,
+          appBar: AppBar(
+            title: const Text(
+              '학생 통합 관리 센터',
+              style: TextStyle(fontWeight: FontWeight.bold),
+            ),
+            backgroundColor: AppPalette.ink,
+            foregroundColor: AppPalette.paper,
+            elevation: 0,
+          ),
+          body: SingleChildScrollView(
+            padding: const EdgeInsets.all(24.0),
+            child: LayoutBuilder(
+              builder: (context, constraints) {
+                // 🖥️ 웹(넓은 화면)은 계정 추가/엑셀 등록을 정사각형 2칸으로 나란히, 폰은 기존처럼 세로로 쌓는다.
+                // 📐 학생 목록 타일은 "실시간 출석 확인" 목록의 타일(220x148)과 동일하게 맞춘다.
+                final bool isWide = constraints.maxWidth >= 800;
+                final double listWidth = constraints.maxWidth;
+                // 📉 계정 추가 / 엑셀 등록 칸: 정사각형 기본 크기의 25%(+ 버튼까지 다 보이도록 확대).
+                final double formSquareSize =
+                    ((constraints.maxWidth - 20) / 2) * 0.25 * 1.45;
+
+                final Widget addBoxColumn = Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    _sectionTitle('신규 학생 계정 추가'),
+                    const SizedBox(height: 16),
+                    SizedBox(
+                      width: isWide ? formSquareSize : double.infinity,
+                      height: isWide ? formSquareSize : null,
+                      child: _buildAddAccountBox(),
+                    ),
+                  ],
+                );
+
+                final Widget excelBoxColumn = Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    _sectionTitle('엑셀로 한번에 추가 (신입생 등)'),
+                    const SizedBox(height: 16),
+                    SizedBox(
+                      width: isWide ? formSquareSize : double.infinity,
+                      height: isWide ? formSquareSize : 240,
+                      child: _buildExcelBox(),
+                    ),
+                  ],
+                );
+
+                return Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    isWide
+                        ? Row(
+                            crossAxisAlignment: CrossAxisAlignment.start,
+                            children: [
+                              addBoxColumn,
+                              const SizedBox(width: 20),
+                              excelBoxColumn,
+                            ],
+                          )
+                        : Column(
+                            crossAxisAlignment: CrossAxisAlignment.start,
+                            children: [
+                              addBoxColumn,
+                              const SizedBox(height: 24),
+                              excelBoxColumn,
+                            ],
                           ),
                     const SizedBox(height: 36),
 
-                // 🏷️ 인디케이터 바 (전체 학생 목록)
+                    // 🏷️ 인디케이터 바 (전체 학생 목록) — 위 두 칸을 합친 폭에 맞춘다.
+                    SizedBox(
+                      width: listWidth,
+                      child: Column(
+                        crossAxisAlignment: CrossAxisAlignment.start,
+                        children: [
                           Row(
                             children: [
-                    Container(
-                      width: 4,
-                      height: 16,
-                      decoration: BoxDecoration(
-                        color: Colors.blue,
-                        borderRadius: BorderRadius.circular(2),
-                      ),
-                    ),
-                    const SizedBox(width: 8),
-                    const Text(
-                      '전체 학생 목록',
-                      style: TextStyle(
-                        fontSize: 18,
-                        fontWeight: FontWeight.bold,
-                      ),
-                    ),
+                              _sectionTitle('전체 학생 목록'),
                               const Spacer(),
                               IconButton(
                                 icon: const Icon(Icons.refresh_rounded),
@@ -620,14 +761,18 @@ class _TeacherStudentManagementPageState
                           const SizedBox(height: 8),
                           const Text(
                             '학년 칩을 눌러 학년을 바꾸고, 기기 리셋은 학생이 폰을 바꿨을 때 사용하세요.',
-                  style: TextStyle(color: Colors.black54, fontSize: 12),
+                            style: TextStyle(
+                              color: Colors.black54,
+                              fontSize: 12,
+                            ),
                           ),
                           const SizedBox(height: 12),
-
                           _controller.isLoadingStudents
                               ? const Padding(
                                   padding: EdgeInsets.symmetric(vertical: 40),
-                        child: Center(child: CircularProgressIndicator()),
+                                  child: Center(
+                                    child: CircularProgressIndicator(),
+                                  ),
                                 )
                               : _controller.students.isEmpty
                               ? const Padding(
@@ -639,98 +784,30 @@ class _TeacherStudentManagementPageState
                                     ),
                                   ),
                                 )
-                    : ListView.builder(
+                              : GridView.builder(
                                   shrinkWrap: true,
                                   physics: const NeverScrollableScrollPhysics(),
+                                  gridDelegate:
+                                      const SliverGridDelegateWithMaxCrossAxisExtent(
+                                        maxCrossAxisExtent:
+                                            kAttendanceTileWidth,
+                                        mainAxisExtent: kAttendanceTileHeight,
+                                        crossAxisSpacing: 12,
+                                        mainAxisSpacing: 12,
+                                      ),
                                   itemCount: _controller.students.length,
-                        itemBuilder: (context, index) {
-                          final student = _controller.students[index];
-                          final String studentId = student['id'].toString();
-                          final String studentName = student['name'].toString();
-                          final int? grade = student['grade'] as int?;
-                          final bool needsReset = student['device'] == '초기화 필요';
-
-                          return Card(
-                            elevation: 1,
-                            margin: const EdgeInsets.only(bottom: 10),
-                            shape: RoundedRectangleBorder(
-                              borderRadius: BorderRadius.circular(16),
-                            ),
-                            child: ListTile(
-                              contentPadding: const EdgeInsets.symmetric(
-                                horizontal: 16,
-                                vertical: 8,
-                              ),
-                              leading: CircleAvatar(
-                                backgroundColor: needsReset
-                                    ? Colors.red[50]
-                                    : Colors.blue[50],
-                                child: Icon(
-                                  needsReset ? Icons.lock_reset : Icons.person,
-                                  color: needsReset ? Colors.red : Colors.blue,
-                                ),
-                              ),
-                              title: Text(
-                                '$studentName ($studentId)',
-                                style: const TextStyle(
-                                  fontWeight: FontWeight.bold,
-                                ),
-                              ),
-                              subtitle: Text(
-                                needsReset ? '기기 초기화 승인 대기중' : '정상 등록 상태',
-                                style: TextStyle(
-                                  color: needsReset ? Colors.red : Colors.grey,
-                                  fontWeight: needsReset
-                                      ? FontWeight.bold
-                                      : FontWeight.normal,
-                                ),
-                              ),
-                              trailing: Row(
-                                mainAxisSize: MainAxisSize.min,
-                                children: [
-                                  Builder(
-                                    builder: (chipContext) => ActionChip(
-                                      label: Text(
-                                        grade != null ? '$grade학년' : '미배정',
-                                      ),
-                                      onPressed: () => _showGradeMenu(
-                                        chipContext,
-                                        studentId,
-                                        studentName,
-                                        grade,
-                                      ),
-                                    ),
-                                  ),
-                                  IconButton(
-                                    icon: const Icon(
-                                      Icons.lock_reset,
-                                      color: Colors.purple,
-                                    ),
-                                    tooltip: '기기 리셋',
-                                    onPressed: () => _confirmResetDevice(
-                                      studentId,
-                                      studentName,
-                                    ),
-                                  ),
-                                  IconButton(
-                                    icon: const Icon(
-                                      Icons.delete_forever_rounded,
-                                      color: Colors.redAccent,
-                                    ),
-                                    tooltip: '계정 영구 삭제',
-                                    onPressed: () => _confirmDeleteStudent(
-                                      studentId,
-                                      studentName,
+                                  itemBuilder: (context, index) =>
+                                      _buildStudentTile(
+                                        _controller.students[index],
                                       ),
                                 ),
                         ],
                       ),
                     ),
+                  ],
                 );
               },
             ),
-              ],
-            ),
           ),
         );
       },

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -11,6 +11,7 @@ import file_picker_darwin
 import firebase_core
 import firebase_messaging
 import flutter_local_notifications
+import shared_preferences_foundation
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   DesktopDropPlugin.register(with: registry.registrar(forPlugin: "DesktopDropPlugin"))
@@ -19,4 +20,5 @@ func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   FLTFirebaseCorePlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseCorePlugin"))
   FLTFirebaseMessagingPlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseMessagingPlugin"))
   FlutterLocalNotificationsPlugin.register(with: registry.registrar(forPlugin: "FlutterLocalNotificationsPlugin"))
+  SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
 }

pubspec.lock

@@ -109,10 +109,10 @@ packages:
     dependency: "direct main"
     description:
       name: desktop_drop
-      sha256: c65d1f959ccf4bb6803f984303d03e1e0dd4c0f73a3a2eca2d1b46d48ea16999
+      sha256: "4c639b4cb80780d1cb94c3252309772e5e68522372181497bc9cd2fbd973aec1"
       url: "https://pub.dev"
     source: hosted
-    version: "0.8.2"
+    version: "0.8.3"
   device_info_plus:
     dependency: "direct main"
     description:
@@ -350,6 +350,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.1.1"
+  flutter_staggered_grid_view:
+    dependency: "direct main"
+    description:
+      name: flutter_staggered_grid_view
+      sha256: "19e7abb550c96fbfeb546b23f3ff356ee7c59a019a651f8f102a4ba9b7349395"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.0"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -472,6 +480,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.1"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      sha256: "58c2005f147315b11e9b4a7bc889cd5203e250cba8e3f012dae259b4972b5c16"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.2"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      sha256: "484838772624c3a4b94f1e44a3e19897fee738f2d5c4ce448443b0417f7c9dda"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      sha256: bd6f00dbd873bfb70d0761682da2b3a2c2fccc2b9e84c495821639601d81afe7
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.0"
   permission_handler:
     dependency: "direct main"
     description:
@@ -544,6 +576,62 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.8"
+  shared_preferences:
+    dependency: "direct main"
+    description:
+      name: shared_preferences
+      sha256: c3025c5534b01739267eb7d76959bbc25a6d10f6988e1c2a3036940133dd10bf
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.5"
+  shared_preferences_android:
+    dependency: transitive
+    description:
+      name: shared_preferences_android
+      sha256: "1e12aafe408aa50da80edfd679a2a6bf63ba7ab37c7fa98286da459a757b3399"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.28"
+  shared_preferences_foundation:
+    dependency: transitive
+    description:
+      name: shared_preferences_foundation
+      sha256: "2ec3934efa51e46117f23031cc141b8fc878e8525b94ec1ea4f7f586cf1b47ea"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.7"
+  shared_preferences_linux:
+    dependency: transitive
+    description:
+      name: shared_preferences_linux
+      sha256: "580abfd40f415611503cae30adf626e6656dfb2f0cee8f465ece7b6defb40f2f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      sha256: "649dc798a33931919ea356c4305c2d1f81619ea6e92244070b520187b5140ef9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.2"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      sha256: c49bd060261c9a3f0ff445892695d6212ff603ef3115edbb448509d407600019
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.3"
+  shared_preferences_windows:
+    dependency: transitive
+    description:
+      name: shared_preferences_windows
+      sha256: "94ef0f72b2d71bc3e700e025db3710911bd51a71cefb65cc609dd0d9a982e3c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -703,4 +791,4 @@ packages:
     version: "6.6.1"
 sdks:
   dart: ">=3.12.2 <4.0.0"
-  flutter: ">=3.41.0"
+  flutter: ">=3.44.0"

pubspec.yaml

@@ -16,7 +16,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 1.2.0+6
+version: 1.3.0+7
 
 environment:
   sdk: ^3.12.2
@@ -41,6 +41,7 @@ dependencies:
   nfc_manager: ^4.2.1
   nfc_manager_ndef: ^1.1.0
   http: ^1.1.0
+  shared_preferences: ^2.3.3
 
   # 🔦 주머니 제출 모드 무단 반출 감지용 조도 센서 (Android 전용, iOS는 SensorKit 엔타이틀먼트 필요)
   light: ^5.0.0
@@ -54,8 +55,9 @@ dependencies:
   vibration: ^3.2.0
   excel: ^4.0.6
   file_picker: ^12.1.2
-  desktop_drop: ^0.8.2
+  desktop_drop: ^0.8.3
   web: ^1.1.1
+  flutter_staggered_grid_view: ^0.7.0
 
 dev_dependencies:
   flutter_test: