已完成“考试安排与考场管理”模块：

考试计划草稿、场次配置与正式发布。
教学班、考试时间、考场、监考教师关联。
自动校验考场容量。
阻止考场、监考教师和学生考试时间冲突。
管理员查看考生名单。
教师查看个人监考安排。
学生查看已发布考试日程。
SQLite 增量升级和 MySQL 正式迁移。

src/Jiaowu.Api/Infrastructure/Persistence/AppDbContext.cs

@@ -35,6 +35,10 @@ public sealed class AppDbContext(DbContextOptions<AppDbContext> options)
     public DbSet<CourseEnrollment> CourseEnrollments => Set<CourseEnrollment>();
     public DbSet<GradeSheet> GradeSheets => Set<GradeSheet>();
     public DbSet<GradeRecord> GradeRecords => Set<GradeRecord>();
+    public DbSet<ExamPlan> ExamPlans => Set<ExamPlan>();
+    public DbSet<ExamSession> ExamSessions => Set<ExamSession>();
+    public DbSet<ExamSessionInvigilator> ExamSessionInvigilators =>
+        Set<ExamSessionInvigilator>();
     public DbSet<AuditLog> AuditLogs => Set<AuditLog>();
 
     protected override void OnModelCreating(ModelBuilder builder)
@@ -353,6 +357,36 @@ public sealed class AppDbContext(DbContextOptions<AppDbContext> options)
                 .OnDelete(DeleteBehavior.Restrict);
         });
 
+        builder.Entity<ExamPlan>(entity =>
+        {
+            entity.Property(x => x.Name).HasMaxLength(120);
+            entity.Property(x => x.Notes).HasMaxLength(500);
+            entity.HasIndex(x => new { x.AcademicTermId, x.Status });
+            entity.HasOne(x => x.AcademicTerm).WithMany()
+                .HasForeignKey(x => x.AcademicTermId).OnDelete(DeleteBehavior.Restrict);
+        });
+        builder.Entity<ExamSession>(entity =>
+        {
+            entity.Property(x => x.Notes).HasMaxLength(500);
+            entity.HasIndex(x => new { x.ExamPlanId, x.StartsAt });
+            entity.HasIndex(x => x.TeachingTaskId);
+            entity.HasIndex(x => x.ClassroomId);
+            entity.HasOne(x => x.ExamPlan).WithMany(x => x.Sessions)
+                .HasForeignKey(x => x.ExamPlanId).OnDelete(DeleteBehavior.Cascade);
+            entity.HasOne(x => x.TeachingTask).WithMany()
+                .HasForeignKey(x => x.TeachingTaskId).OnDelete(DeleteBehavior.Restrict);
+            entity.HasOne(x => x.Classroom).WithMany()
+                .HasForeignKey(x => x.ClassroomId).OnDelete(DeleteBehavior.Restrict);
+        });
+        builder.Entity<ExamSessionInvigilator>(entity =>
+        {
+            entity.HasKey(x => new { x.ExamSessionId, x.TeacherId });
+            entity.HasOne(x => x.ExamSession).WithMany(x => x.Invigilators)
+                .HasForeignKey(x => x.ExamSessionId).OnDelete(DeleteBehavior.Cascade);
+            entity.HasOne(x => x.Teacher).WithMany()
+                .HasForeignKey(x => x.TeacherId).OnDelete(DeleteBehavior.Restrict);
+        });
+
         builder.Entity<AuditLog>(entity =>
         {
             entity.Property(x => x.Method).HasMaxLength(10);