feat: integrate undergraduate school workflows and period twelve

mobile/lib/features/timetable/course_details.dart

@@ -24,6 +24,10 @@ void showCourseDetails(BuildContext context, CourseOccurrence event) {
             const SizedBox(height: 20),
             _line(Icons.person_outline_rounded, event.course.teacher),
             _line(Icons.location_on_outlined, event.course.room),
+            if (event.course.courseCode.isNotEmpty)
+              _line(Icons.tag_rounded, '课程代码：${event.course.courseCode}'),
+            if (event.course.notes.isNotEmpty)
+              _line(Icons.info_outline_rounded, event.course.notes),
             _line(
               Icons.schedule_rounded,
               '${minuteLabel(event.start.hour * 60 + event.start.minute)}–${minuteLabel(event.end.hour * 60 + event.end.minute)} · 第 ${event.course.startPeriod}–${event.course.endPeriod} 节',

mobile/lib/features/timetable/timetable_page.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import '../../app/app_controller.dart';
 import '../../app/app_theme.dart';
 import '../../domain/schedule_engine.dart';
+import '../../domain/school_identity.dart';
 import '../../widgets/directional_week_transition.dart';
 import '../profile/settings_page.dart';
 import 'week_grid.dart';
@@ -84,13 +85,24 @@ class _TimetablePageState extends State<TimetablePage> {
             Padding(
               padding: const EdgeInsets.fromLTRB(14, 0, 14, 8),
               child: Text(
-                c.snapshot.schoolTerm!.label,
+                '${c.snapshot.schoolTerm!.school.label} · ${c.snapshot.schoolTerm!.label}',
                 style: TextStyle(
                   fontSize: 12,
                   color: ink.withValues(alpha: 0.5),
                 ),
               ),
             ),
+          if (!c.isDemo &&
+              c.snapshot.schoolTerm != null &&
+              c.snapshot.selectedSchool != null &&
+              c.snapshot.selectedSchool != c.snapshot.schoolTerm!.school)
+            Padding(
+              padding: const EdgeInsets.fromLTRB(14, 0, 14, 8),
+              child: Text(
+                '当前仍为${c.snapshot.schoolTerm!.school.label}课表；新课表导入成功后才会替换。',
+                style: const TextStyle(fontSize: 12, color: river),
+              ),
+            ),
           const SizedBox(height: 10),
           SurfaceCard(
             padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 0),
@@ -182,6 +194,12 @@ class _TimetablePageState extends State<TimetablePage> {
                 monday: monday,
                 today: today,
                 settings: c.visibleSettings,
+                periodCount:
+                    !c.isDemo &&
+                        c.snapshot.schoolTerm?.school ==
+                            SupportedSchool.uestcUndergraduate
+                    ? 12
+                    : 11,
               ),
             ),
             const SizedBox(height: 12),

mobile/lib/features/timetable/week_grid.dart

@@ -14,7 +14,9 @@ class WeekGrid extends StatelessWidget {
     required this.monday,
     required this.today,
     required this.settings,
-  });
+    this.periodCount = 11,
+  }) : assert(periodCount == 11 || periodCount == 12);
+  final int periodCount;
   final List<CourseOccurrence> events;
   final DateTime monday, today;
   final AppSettings settings;
@@ -111,7 +113,7 @@ class WeekGrid extends StatelessWidget {
           (period - 1) * rowHeight +
           (period > 4 ? gap : 0) +
           (period > 8 ? gap : 0);
-      final height = 11 * rowHeight + 2 * gap;
+      final height = periodCount * rowHeight + 2 * gap;
       return Row(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
@@ -120,7 +122,7 @@ class WeekGrid extends StatelessWidget {
             height: header + height,
             child: Stack(
               children: [
-                for (final slot in lessonSlots)
+                for (final slot in lessonSlots.take(periodCount))
                   Positioned(
                     top: header + top(slot.period),
                     left: 0,
@@ -244,7 +246,7 @@ class WeekGrid extends StatelessWidget {
                             ),
                           ),
                         ),
-                      for (var p = 1; p <= 11; p++)
+                      for (var p = 1; p <= periodCount; p++)
                         Positioned(
                           left: 0,
                           right: 0,