新增按学期配置的“自动排课优化”页签，可调教师/行政班同日集中、行政班空档与连堂、首末节、教室容量冗余等权重。

自动排课在所有硬约束满足后，对候选排法应用这些软约束评分；不会改动既有课程或已发布课表。

tests/Jiaowu.Api.Tests/ScheduleSettingsControllerTests.cs

@@ -13,6 +13,47 @@ namespace Jiaowu.Api.Tests;
 
 public sealed class ScheduleSettingsControllerTests
 {
+    [Fact]
+    public async Task Optimization_settings_return_defaults_then_persist_per_term_weights()
+    {
+        await using var connection = new SqliteConnection("Data Source=:memory:");
+        await connection.OpenAsync();
+        var options = new DbContextOptionsBuilder<AppDbContext>()
+            .UseSqlite(connection)
+            .Options;
+        await using var db = new AppDbContext(options);
+        await db.Database.EnsureCreatedAsync();
+        var term = new AcademicTerm
+        {
+            Code = "2026-F",
+            Name = "2026 秋季",
+            AcademicYear = "2026-2027",
+            Season = TermSeason.Autumn,
+            StartDate = new DateOnly(2026, 9, 7),
+            EndDate = new DateOnly(2027, 1, 17)
+        };
+        db.AcademicTerms.Add(term);
+        await db.SaveChangesAsync();
+        var controller = new ScheduleSettingsController(db, NoOpAppCache.Instance);
+
+        var defaults = Assert.IsType<OkObjectResult>(await controller
+            .GetOptimizationSettings(term.Id, CancellationToken.None));
+        Assert.Contains("120", JsonSerializer.Serialize(defaults.Value));
+        Assert.Empty(await db.ScheduleOptimizationSettings.ToListAsync());
+
+        var saved = Assert.IsType<OkObjectResult>(await controller
+            .SaveOptimizationSettings(
+                term.Id,
+                new ScheduleOptimizationSettingsRequest(200, 180, 300, 90, 40, 50, 2),
+                CancellationToken.None));
+        Assert.Contains("300", JsonSerializer.Serialize(saved.Value));
+        db.ChangeTracker.Clear();
+        var settings = await db.ScheduleOptimizationSettings.SingleAsync();
+        Assert.Equal(200, settings.TeacherSameDayWeight);
+        Assert.Equal(300, settings.ClassGapWeight);
+        Assert.Equal(2, settings.RoomCapacityWasteWeight);
+    }
+
     [Fact]
     public async Task Batch_constraints_assign_same_classroom_scope_to_all_tasks()
     {