排课版本新建、编辑、复制、发布、归档和删除。

周课表视图，支持12节课、单双周和起止周。
自动校验教师、行政班、教室、时间段冲突。
校验教室容量、教学任务状态和学期范围。
SQLite 开发环境自动升级，MySQL 提供正式 EF Core 迁移。
Vue 已编译为静态文件并随 ASP.NET Core 发布，无需 npm run dev。
桌面端和390px移动端页面均已验收。

src/Jiaowu.Api/Infrastructure/Scheduling/ScheduleConflictDetector.cs

@@ -0,0 +1,62 @@
+using Jiaowu.Api.Domain.Academic;
+
+namespace Jiaowu.Api.Infrastructure.Scheduling;
+
+public static class ScheduleConflictDetector
+{
+    public static string? FindConflict(IReadOnlyList<ScheduleEntry> entries)
+    {
+        for (var i = 0; i < entries.Count; i++)
+        {
+            for (var j = i + 1; j < entries.Count; j++)
+            {
+                var first = entries[i];
+                var second = entries[j];
+                if (!TimeOverlaps(first, second)) continue;
+                var reason = ConflictReason(first, second);
+                if (reason is not null)
+                    return $"“{first.TeachingTask!.Name}”与“{second.TeachingTask!.Name}”存在{reason}冲突。";
+            }
+        }
+        return null;
+    }
+
+    public static bool TimeOverlaps(ScheduleEntry first, ScheduleEntry second) =>
+        first.DayOfWeek == second.DayOfWeek &&
+        first.StartPeriod < second.StartPeriod + second.PeriodCount &&
+        second.StartPeriod < first.StartPeriod + first.PeriodCount &&
+        WeeksOverlap(first, second);
+
+    public static string? ConflictReason(ScheduleEntry first, ScheduleEntry second)
+    {
+        if (first.ClassroomId == second.ClassroomId) return "教室";
+        var firstTeachers = first.TeachingTask!.Teachers.Select(x => x.TeacherId).ToHashSet();
+        if (second.TeachingTask!.Teachers.Any(x => firstTeachers.Contains(x.TeacherId)))
+            return "教师";
+        var firstClasses = first.TeachingTask.Classes
+            .Select(x => x.AdministrativeClassId)
+            .ToHashSet();
+        return second.TeachingTask.Classes.Any(x =>
+            firstClasses.Contains(x.AdministrativeClassId))
+            ? "行政班"
+            : null;
+    }
+
+    private static bool WeeksOverlap(ScheduleEntry first, ScheduleEntry second)
+    {
+        var start = Math.Max(first.StartWeek, second.StartWeek);
+        var end = Math.Min(first.EndWeek, second.EndWeek);
+        for (var week = start; week <= end; week++)
+        {
+            if (IncludesWeek(first.WeekPattern, week) &&
+                IncludesWeek(second.WeekPattern, week))
+                return true;
+        }
+        return false;
+    }
+
+    private static bool IncludesWeek(WeekPattern pattern, int week) =>
+        pattern == WeekPattern.All ||
+        pattern == WeekPattern.Odd && week % 2 == 1 ||
+        pattern == WeekPattern.Even && week % 2 == 0;
+}