Implement comprehensive academic workflow enhancements

tests/Jiaowu.Api.Tests/AutomaticScheduleGeneratorTests.cs

@@ -67,6 +67,14 @@ public sealed class AutomaticScheduleGeneratorTests
                 WHERE name = 'SchedulingMode'
                 """)
             .AnyAsync(value => value > 0));
+        Assert.True(await db.Database
+            .SqlQueryRaw<int>(
+                """
+                SELECT COUNT(*) AS "Value"
+                FROM pragma_table_info('Classrooms')
+                WHERE name = 'Floor'
+                """)
+            .AnyAsync(value => value > 0));
     }
 
     [Fact]
@@ -502,4 +510,83 @@ public sealed class AutomaticScheduleGeneratorTests
         Assert.Equal(1, await db.Buildings.CountAsync());
         Assert.Equal(2, await db.Classrooms.CountAsync());
     }
+
+    [Fact]
+    public async Task Generator_prefers_ground_floor_for_class_with_mobility_accessibility_need()
+    {
+        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-A11Y", Name = "无障碍排课测试", AcademicYear = "2026-2027",
+            Season = TermSeason.Autumn, StartDate = new DateOnly(2026, 9, 1),
+            EndDate = new DateOnly(2027, 1, 15)
+        };
+        var college = new College { Code = "A11Y", Name = "无障碍学院" };
+        var major = new Major
+        {
+            Code = "A11Y-M", Name = "无障碍专业", College = college,
+            DegreeType = "本科", SchoolingYears = 4
+        };
+        var administrativeClass = new AdministrativeClass
+        {
+            Code = "A11Y-01", Name = "无障碍一班", Major = major, Grade = 2026
+        };
+        var student = new Student
+        {
+            StudentNumber = "A11Y-001", Name = "学生甲", AdministrativeClass = administrativeClass,
+            EnrollmentYear = 2026, EnrollmentDate = new DateOnly(2026, 9, 1),
+            SpecialTags = "肢体残疾，听力障碍"
+        };
+        var campus = new Campus { Code = "A11Y-C", Name = "无障碍校区" };
+        var building = new Building { Code = "A11Y-B", Name = "无障碍教学楼", Campus = campus };
+        var groundFloorRoom = new Classroom
+        {
+            Code = "A11Y-101", Name = "首层教室", Building = building, Capacity = 30, Floor = 1
+        };
+        var upperFloorRoom = new Classroom
+        {
+            Code = "A11Y-301", Name = "三层教室", Building = building, Capacity = 30, Floor = 3
+        };
+        var course = new Course
+        {
+            Code = "A11Y-COURSE", Name = "无障碍课程", College = college,
+            Credits = 1, TotalHours = 2, LectureHours = 2
+        };
+        var task = new TeachingTask
+        {
+            TaskNumber = "A11Y-TASK", Name = "无障碍教学班", AcademicTerm = term,
+            Course = course, Capacity = 1, StartWeek = 1, EndWeek = 1, WeeklyHours = 2,
+            Status = TeachingTaskStatus.Published,
+            Classes = [new TeachingTaskClass { AdministrativeClass = administrativeClass }]
+        };
+        var plan = new SchedulePlan { AcademicTerm = term, Name = "无障碍方案", Version = "V1" };
+        db.AddRange(term, college, major, administrativeClass, student, campus, building,
+            groundFloorRoom, upperFloorRoom, course, task, plan);
+        db.ScheduleTimeSlots.AddRange(
+            new ScheduleTimeSlot
+            {
+                AcademicTerm = term, PeriodNumber = 1, Name = "第 1 节",
+                StartsAt = new TimeOnly(8, 0), EndsAt = new TimeOnly(8, 45)
+            },
+            new ScheduleTimeSlot
+            {
+                AcademicTerm = term, PeriodNumber = 2, Name = "第 2 节",
+                StartsAt = new TimeOnly(8, 55), EndsAt = new TimeOnly(9, 40)
+            });
+        await db.SaveChangesAsync();
+
+        var result = await new AutomaticScheduleGenerator(db)
+            .GenerateAsync(plan, CancellationToken.None);
+
+        var entry = Assert.Single(await db.ScheduleEntries.ToListAsync());
+        Assert.Equal(1, result.CompletedTasks);
+        Assert.Equal(groundFloorRoom.Id, entry.ClassroomId);
+    }
 }