실시간 출석 현황: 검정 배너 제거 + 기능들을 런치패드 메뉴로 통합

- 상단 검정 AppBar 대신 투명 배경 + 가운데 둥근 알약 제목으로 변경
- 새로고침/자습실 출석시간 설정/반출 허용 시간 설정/하교 처리/테스트용
  초기화를 "자습실 시간 설정 메뉴" 하나로 모아서, 메인 대시보드의
  로그아웃/설정 메뉴와 같은 런치패드 스타일(배경 블러) 오버레이로 표시
- 데스크탑은 사이드바에 전용 버튼을 추가하고, 폰에서는 앱바의 "..."
  아이콘으로 같은 메뉴에 접근 (모바일 기능 접근성 유지)

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

lib/ui/teacher_attendance_page.dart

@@ -205,66 +205,36 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
 
         return Scaffold(
           backgroundColor: AppPalette.mist,
+          // 🪶 검정 배너 대신 가운데에 둥근 제목 알약만 띄우고, 나머지 기능은 전부
+          // "자습실 시간 설정 메뉴"(런치패드 스타일 오버레이) 하나로 모은다.
+          // 폰에서는 사이드바가 없으니 여기 아이콘으로도 같은 메뉴를 열 수 있게 둔다.
           appBar: AppBar(
-            title: const Text(
+            backgroundColor: Colors.transparent,
-              '실시간 출석 현황',
+            foregroundColor: AppPalette.ink,
-              style: TextStyle(fontWeight: FontWeight.bold),
-            ),
-            backgroundColor: AppPalette.ink,
-            foregroundColor: Colors.white,
             elevation: 0,
+            centerTitle: true,
+            title: Container(
+              padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 10),
+              decoration: BoxDecoration(
+                color: AppPalette.ink,
+                borderRadius: BorderRadius.circular(999),
+              ),
+              child: const Text(
+                '실시간 출석 현황',
+                style: TextStyle(
+                  color: Colors.white,
+                  fontWeight: FontWeight.bold,
+                  fontSize: 15,
+                ),
+              ),
+            ),
             actions: [
               IconButton(
-                onPressed: (_controller.isLoading || _controller.isRefreshing)
+                icon: const Icon(Icons.more_horiz_rounded),
-                    ? null
+                tooltip: '자습실 시간 설정 메뉴',
-                    : _controller.manualRefresh,
+                onPressed: _showTimeSettingsMenu,
-                icon: _controller.isRefreshing
-                    ? const SizedBox(
-                        width: 20,
-                        height: 20,
-                        child: CircularProgressIndicator(
-                          strokeWidth: 2,
-                          color: Colors.white,
               ),
-                      )
+              const SizedBox(width: 4),
-                    : const Icon(Icons.refresh_rounded),
-                tooltip: '새로고침',
-              ),
-              TextButton.icon(
-                onPressed: _showAttendanceTimeDialog,
-                icon: const Icon(
-                  Icons.access_time_rounded,
-                  color: Colors.white,
-                ),
-                label: Text(
-                  _controller.attendanceTime != null
-                      ? '출석시간 ${_controller.attendanceTime}'
-                      : '자습실 출석시간 설정',
-                  style: const TextStyle(color: Colors.white),
-                ),
-              ),
-              TextButton.icon(
-                onPressed: _showPermissionWindowDialog,
-                icon: const Icon(Icons.timer_outlined, color: Colors.white),
-                label: const Text(
-                  '반출 허용 시간 설정',
-                  style: TextStyle(color: Colors.white),
-                ),
-              ),
-              TextButton.icon(
-                onPressed: _showDismissalConfirmDialog,
-                icon: const Icon(Icons.school_rounded, color: Colors.white),
-                label: const Text('하교', style: TextStyle(color: Colors.white)),
-              ),
-              IconButton(
-                onPressed: _showTestResetConfirmDialog,
-                icon: const Icon(
-                  Icons.bug_report_outlined,
-                  color: Colors.white70,
-                ),
-                tooltip: '테스트용: 허용시간 초기화',
-              ),
-              const SizedBox(width: 8),
             ],
           ),
           body: _controller.isLoading
@@ -567,11 +537,49 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
           _sidebarStatPill('미출석 학생수', absent, 'ABSENT'),
           const SizedBox(height: 20),
           _sidebarFilterButton(),
+          const SizedBox(height: 10),
+          _sidebarTimeSettingsButton(),
         ],
       ),
     );
   }
 
+  Widget _sidebarTimeSettingsButton() {
+    return InkWell(
+      onTap: _showTimeSettingsMenu,
+      borderRadius: BorderRadius.circular(28),
+      child: Container(
+        padding: const EdgeInsets.symmetric(vertical: 14, horizontal: 12),
+        decoration: BoxDecoration(
+          color: AppPalette.paper,
+          borderRadius: BorderRadius.circular(28),
+          border: Border.all(color: AppPalette.sage),
+        ),
+        child: Row(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            const Icon(
+              Icons.access_time_rounded,
+              size: 18,
+              color: AppPalette.ink,
+            ),
+            const SizedBox(width: 8),
+            const Flexible(
+              child: Text(
+                '자습실 시간 설정 메뉴',
+                overflow: TextOverflow.ellipsis,
+                style: TextStyle(
+                  fontWeight: FontWeight.bold,
+                  color: AppPalette.ink,
+                ),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
   Widget _sidebarStatPill(String label, int count, String filterValue) {
     final bool selected = _controller.filterType == filterValue;
     return InkWell(
@@ -705,6 +713,42 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
     );
   }
 
+  // 🚀 "자습실 시간 설정 메뉴" — 새로고침/출석시간/반출허용/하교/테스트리셋을
+  // 전부 여기 하나로 모아서, 메인 대시보드의 로그아웃/설정 메뉴와 똑같은
+  // 런치패드 스타일(배경 블러 유지) 오버레이로 띄운다.
+  Future<void> _showTimeSettingsMenu() async {
+    final action = await showLaunchpadMenu<String>(
+      context: context,
+      builder: (context) => Center(
+        child: _TimeSettingsMenuCard(
+          isRefreshing: _controller.isRefreshing,
+          attendanceTimeLabel: _controller.attendanceTime != null
+              ? '출석시간 ${_controller.attendanceTime}'
+              : '자습실 출석시간 설정',
+          onPick: (value) => Navigator.pop(context, value),
+        ),
+      ),
+    );
+    if (!mounted || action == null) return;
+    switch (action) {
+      case 'refresh':
+        _controller.manualRefresh();
+        break;
+      case 'attendance_time':
+        _showAttendanceTimeDialog();
+        break;
+      case 'permission_window':
+        _showPermissionWindowDialog();
+        break;
+      case 'dismissal':
+        _showDismissalConfirmDialog();
+        break;
+      case 'test_reset':
+        _showTestResetConfirmDialog();
+        break;
+    }
+  }
+
   // 🪑 좌석표처럼 촘촘하게 학생 한 명씩을 작은 칸에 담는 그리드.
   Widget _buildDenseSeatGrid(List<Map<String, dynamic>> students) {
     if (students.isEmpty) {
@@ -915,3 +959,116 @@ class _TeacherAttendancePageState extends State<TeacherAttendancePage> {
     );
   }
 }
+
+// 🚀 "자습실 시간 설정 메뉴" 카드 — 메인 대시보드 로그아웃/설정 메뉴와 같은 톤으로 통일.
+class _TimeSettingsMenuCard extends StatelessWidget {
+  final bool isRefreshing;
+  final String attendanceTimeLabel;
+  final ValueChanged<String> onPick;
+
+  const _TimeSettingsMenuCard({
+    required this.isRefreshing,
+    required this.attendanceTimeLabel,
+    required this.onPick,
+  });
+
+  @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: 220),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              _TimeMenuRow(
+                icon: isRefreshing ? null : Icons.refresh_rounded,
+                label: '새로고침',
+                onTap: () => onPick('refresh'),
+              ),
+              const Divider(height: 1, color: AppPalette.sage),
+              _TimeMenuRow(
+                icon: Icons.access_time_rounded,
+                label: attendanceTimeLabel,
+                onTap: () => onPick('attendance_time'),
+              ),
+              const Divider(height: 1, color: AppPalette.sage),
+              _TimeMenuRow(
+                icon: Icons.timer_outlined,
+                label: '반출 허용 시간 설정',
+                onTap: () => onPick('permission_window'),
+              ),
+              const Divider(height: 1, color: AppPalette.sage),
+              _TimeMenuRow(
+                icon: Icons.school_rounded,
+                label: '하교 처리',
+                onTap: () => onPick('dismissal'),
+              ),
+              const Divider(height: 1, color: AppPalette.sage),
+              _TimeMenuRow(
+                icon: Icons.bug_report_outlined,
+                label: '테스트용: 허용시간 초기화',
+                dim: true,
+                onTap: () => onPick('test_reset'),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class _TimeMenuRow extends StatelessWidget {
+  final IconData? icon;
+  final String label;
+  final VoidCallback onTap;
+  final bool dim;
+
+  const _TimeMenuRow({
+    required this.icon,
+    required this.label,
+    required this.onTap,
+    this.dim = false,
+  });
+
+  @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: [
+            SizedBox(
+              width: 20,
+              height: 20,
+              child: icon == null
+                  ? const CircularProgressIndicator(strokeWidth: 2)
+                  : Icon(
+                      icon,
+                      size: 20,
+                      color: dim ? Colors.grey : AppPalette.ink,
+                    ),
+            ),
+            const SizedBox(width: 12),
+            Flexible(
+              child: Text(
+                label,
+                style: TextStyle(
+                  fontWeight: FontWeight.w600,
+                  color: dim ? Colors.grey[600] : AppPalette.ink,
+                ),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}