선생님 호출 화면 이모티콘을 검정 아이콘으로 통일

위치 이모티콘(🏢🍴🧪 등)을 Material 아이콘으로, 랭킹 메달 이모티콘을
백품타 랭킹 화면과 같은 금/은/동 색 emoji_events 아이콘으로 교체.

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

lib/data/teacher_call_schedule.dart

@@ -1,3 +1,5 @@
+import 'package:flutter/material.dart';
+
 // 📅 선생님 호출 화면에서 "지금 수업 중" 배지를 보여주기 위한 시간표 데이터.
 // 원래 별도 Firebase 페이지(index.html)에 있던 데이터를 그대로 옮기면서,
 // "김지" 약어가 실제로는 조신현 선생님을 가리키던 오타를 "조신"으로 바로잡았다.
@@ -101,15 +103,15 @@ List<String> teachersInClassNow(int weekday, String hhmm) {
   return abbrevs.map((a) => kTeacherAbbrevMap[a]).whereType<String>().toList();
 }
 
-const Map<String, String> kLocationIcons = {
-  "교무실": "🏢",
-  "급식실": "🍴",
-  "과학실": "🧪",
-  "도서관": "📖",
-  "출장": "🚗",
-  "조퇴/퇴근": "🏠",
-  "상담실": "💬",
-  "기숙사": "🏨",
+const Map<String, IconData> kLocationIcons = {
+  "교무실": Icons.business_rounded,
+  "급식실": Icons.restaurant_rounded,
+  "과학실": Icons.science_rounded,
+  "도서관": Icons.menu_book_rounded,
+  "출장": Icons.directions_car_rounded,
+  "조퇴/퇴근": Icons.home_rounded,
+  "상담실": Icons.forum_rounded,
+  "기숙사": Icons.hotel_rounded,
 };
 
 const List<String> kLocationOptions = [

lib/ui/teacher_call_screen.dart

@@ -239,8 +239,13 @@ class _TeacherCallScreenState extends State<TeacherCallScreen> {
     );
   }
 
+  static const List<Color> _medalColors = [
+    Color(0xFFC9A227), // 금
+    Color(0xFF9AA0A6), // 은
+    Color(0xFFB07A4B), // 동
+  ];
+
   Widget _buildRanking() {
-    final medals = ['🥇', '🥈', '🥉'];
     return Container(
       padding: const EdgeInsets.all(14),
       decoration: BoxDecoration(
@@ -272,7 +277,11 @@ class _TeacherCallScreenState extends State<TeacherCallScreen> {
               for (var i = 0; i < _controller.ranking.length; i++)
                 Column(
                   children: [
-                    Text(medals[i], style: const TextStyle(fontSize: 22)),
+                    Icon(
+                      Icons.emoji_events_rounded,
+                      color: _medalColors[i],
+                      size: 22,
+                    ),
                     Text(
                       _controller.ranking[i]['teacherName'] ?? '',
                       style: const TextStyle(fontWeight: FontWeight.bold),
@@ -436,8 +445,17 @@ class _TeacherCallScreenState extends State<TeacherCallScreen> {
                   ),
                 ),
                 const SizedBox(height: 2),
-                Text(
-                  '${kLocationIcons[location] ?? '📍'} $location',
+                Row(
+                  children: [
+                    Icon(
+                      kLocationIcons[location] ?? Icons.location_on_rounded,
+                      size: 12,
+                      color: isSelected ? Colors.white70 : Colors.grey[500],
+                    ),
+                    const SizedBox(width: 3),
+                    Expanded(
+                      child: Text(
+                        location,
                         maxLines: 1,
                         overflow: TextOverflow.ellipsis,
                         style: TextStyle(
@@ -445,6 +463,9 @@ class _TeacherCallScreenState extends State<TeacherCallScreen> {
                           color: isSelected ? Colors.white70 : Colors.grey[500],
                         ),
                       ),
+                    ),
+                  ],
+                ),
               ],
             ),
           ),

lib/ui/teacher_location_screen.dart

@@ -112,8 +112,18 @@ class _TeacherLocationScreenState extends State<TeacherLocationScreen> {
                               ),
                             ),
                             const SizedBox(height: 6),
+                            Row(
+                              mainAxisAlignment: MainAxisAlignment.center,
+                              children: [
+                                Icon(
+                                  kLocationIcons[_controller.currentLocation] ??
+                                      Icons.location_on_rounded,
+                                  color: Colors.white,
+                                  size: 20,
+                                ),
+                                const SizedBox(width: 8),
                                 Text(
-                              '${kLocationIcons[_controller.currentLocation] ?? '📍'} ${_controller.currentLocation}',
+                                  _controller.currentLocation,
                                   style: const TextStyle(
                                     fontWeight: FontWeight.bold,
                                     fontSize: 20,
@@ -122,6 +132,8 @@ class _TeacherLocationScreenState extends State<TeacherLocationScreen> {
                                 ),
                               ],
                             ),
+                          ],
+                        ),
                       ),
                       const SizedBox(height: 20),
                       _sectionHeader('위치 선택'),
@@ -177,9 +189,13 @@ class _TeacherLocationScreenState extends State<TeacherLocationScreen> {
                                             : AppPalette.linen,
                                         shape: BoxShape.circle,
                                       ),
-                                      child: Text(
-                                        kLocationIcons[loc] ?? '📍',
-                                        style: const TextStyle(fontSize: 16),
+                                      child: Icon(
+                                        kLocationIcons[loc] ??
+                                            Icons.location_on_rounded,
+                                        size: 16,
+                                        color: isSelected
+                                            ? Colors.white
+                                            : AppPalette.ink,
                                       ),
                                     ),
                                     const SizedBox(height: 6),