feat(course): add course-assignment workflow with role-based access and assignment-scoped judging

prisma/migrations/20260506081816_add_course_assignment_mvp/migration.sql

@@ -0,0 +1,115 @@
+-- CreateEnum
+CREATE TYPE "CourseEnrollmentRole" AS ENUM ('STUDENT', 'TA');
+
+-- AlterTable
+ALTER TABLE "Submission" ADD COLUMN     "assignmentId" TEXT;
+
+-- CreateTable
+CREATE TABLE "Course" (
+    "id" TEXT NOT NULL,
+    "title" TEXT NOT NULL,
+    "description" TEXT,
+    "archived" BOOLEAN NOT NULL DEFAULT false,
+    "teacherId" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "Course_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "CourseEnrollment" (
+    "id" TEXT NOT NULL,
+    "role" "CourseEnrollmentRole" NOT NULL DEFAULT 'STUDENT',
+    "courseId" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "CourseEnrollment_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "Assignment" (
+    "id" TEXT NOT NULL,
+    "title" TEXT NOT NULL,
+    "description" TEXT,
+    "opensAt" TIMESTAMP(3),
+    "dueAt" TIMESTAMP(3),
+    "published" BOOLEAN NOT NULL DEFAULT false,
+    "courseId" TEXT NOT NULL,
+    "createdById" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "Assignment_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "AssignmentProblem" (
+    "assignmentId" TEXT NOT NULL,
+    "problemId" TEXT NOT NULL,
+    "maxPoints" INTEGER NOT NULL DEFAULT 100,
+    "order" INTEGER,
+
+    CONSTRAINT "AssignmentProblem_pkey" PRIMARY KEY ("assignmentId","problemId")
+);
+
+-- CreateIndex
+CREATE INDEX "Course_teacherId_idx" ON "Course"("teacherId");
+
+-- CreateIndex
+CREATE INDEX "CourseEnrollment_courseId_idx" ON "CourseEnrollment"("courseId");
+
+-- CreateIndex
+CREATE INDEX "CourseEnrollment_userId_idx" ON "CourseEnrollment"("userId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "CourseEnrollment_courseId_userId_key" ON "CourseEnrollment"("courseId", "userId");
+
+-- CreateIndex
+CREATE INDEX "Assignment_courseId_idx" ON "Assignment"("courseId");
+
+-- CreateIndex
+CREATE INDEX "Assignment_createdById_idx" ON "Assignment"("createdById");
+
+-- CreateIndex
+CREATE INDEX "AssignmentProblem_assignmentId_idx" ON "AssignmentProblem"("assignmentId");
+
+-- CreateIndex
+CREATE INDEX "AssignmentProblem_problemId_idx" ON "AssignmentProblem"("problemId");
+
+-- CreateIndex
+CREATE INDEX "Submission_assignmentId_userId_problemId_idx" ON "Submission"("assignmentId", "userId", "problemId");
+
+-- CreateIndex
+CREATE INDEX "Submission_assignmentId_problemId_status_idx" ON "Submission"("assignmentId", "problemId", "status");
+
+-- CreateIndex
+CREATE INDEX "Submission_userId_problemId_idx" ON "Submission"("userId", "problemId");
+
+-- CreateIndex
+CREATE INDEX "Submission_createdAt_idx" ON "Submission"("createdAt");
+
+-- AddForeignKey
+ALTER TABLE "Submission" ADD CONSTRAINT "Submission_assignmentId_fkey" FOREIGN KEY ("assignmentId") REFERENCES "Assignment"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "Course" ADD CONSTRAINT "Course_teacherId_fkey" FOREIGN KEY ("teacherId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "CourseEnrollment" ADD CONSTRAINT "CourseEnrollment_courseId_fkey" FOREIGN KEY ("courseId") REFERENCES "Course"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "CourseEnrollment" ADD CONSTRAINT "CourseEnrollment_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "Assignment" ADD CONSTRAINT "Assignment_courseId_fkey" FOREIGN KEY ("courseId") REFERENCES "Course"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "Assignment" ADD CONSTRAINT "Assignment_createdById_fkey" FOREIGN KEY ("createdById") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "AssignmentProblem" ADD CONSTRAINT "AssignmentProblem_assignmentId_fkey" FOREIGN KEY ("assignmentId") REFERENCES "Assignment"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "AssignmentProblem" ADD CONSTRAINT "AssignmentProblem_problemId_fkey" FOREIGN KEY ("problemId") REFERENCES "Problem"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/migrations/20260506083600_remove_ta_course_role/migration.sql

@@ -0,0 +1,19 @@
+BEGIN;
+
+-- Remove the unused TA variant from CourseEnrollmentRole.
+CREATE TYPE "CourseEnrollmentRole_new" AS ENUM ('STUDENT');
+
+ALTER TABLE "CourseEnrollment"
+ALTER COLUMN "role" DROP DEFAULT;
+
+ALTER TABLE "CourseEnrollment"
+ALTER COLUMN "role" TYPE "CourseEnrollmentRole_new"
+USING ("role"::text::"CourseEnrollmentRole_new");
+
+ALTER TABLE "CourseEnrollment"
+ALTER COLUMN "role" SET DEFAULT 'STUDENT';
+
+DROP TYPE "CourseEnrollmentRole";
+ALTER TYPE "CourseEnrollmentRole_new" RENAME TO "CourseEnrollmentRole";
+
+COMMIT;

prisma/schema.prisma

@@ -56,6 +56,10 @@ enum ProblemContentType {
   SOLUTION
 }
 
+enum CourseEnrollmentRole {
+  STUDENT
+}
+
 model User {
   id            String    @id @default(cuid())
   name          String?
@@ -71,6 +75,9 @@ model User {
   Authenticator Authenticator[]
   problems      Problem[]
   submissions   Submission[]
+  teachingCourses   Course[]           @relation("CourseTeacher")
+  courseEnrollments CourseEnrollment[]
+  createdAssignments Assignment[]      @relation("AssignmentCreator")
 
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
@@ -89,6 +96,7 @@ model Problem {
   templates     Template[]
   testcases     Testcase[]
   submissions   Submission[]
+  assignmentProblems AssignmentProblem[]
 
   userId String?
 
@@ -135,12 +143,88 @@ model Submission {
 
   userId    String
   problemId String
+  assignmentId String?
 
   user    User    @relation(fields: [userId], references: [id], onDelete: Cascade)
   problem Problem @relation(fields: [problemId], references: [id], onDelete: Cascade)
+  assignment Assignment? @relation(fields: [assignmentId], references: [id], onDelete: SetNull)
 
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
+
+  @@index([assignmentId, userId, problemId])
+  @@index([assignmentId, problemId, status])
+  @@index([userId, problemId])
+  @@index([createdAt])
+}
+
+model Course {
+  id          String  @id @default(cuid())
+  title       String
+  description String?
+  archived    Boolean @default(false)
+  teacherId   String
+
+  teacher     User               @relation("CourseTeacher", fields: [teacherId], references: [id], onDelete: Cascade)
+  enrollments CourseEnrollment[]
+  assignments Assignment[]
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@index([teacherId])
+}
+
+model CourseEnrollment {
+  id       String               @id @default(cuid())
+  role     CourseEnrollmentRole @default(STUDENT)
+  courseId String
+  userId   String
+
+  course Course @relation(fields: [courseId], references: [id], onDelete: Cascade)
+  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  createdAt DateTime @default(now())
+
+  @@unique([courseId, userId])
+  @@index([courseId])
+  @@index([userId])
+}
+
+model Assignment {
+  id          String   @id @default(cuid())
+  title       String
+  description String?
+  opensAt     DateTime?
+  dueAt       DateTime?
+  published   Boolean  @default(false)
+  courseId    String
+  createdById String
+
+  course      Course              @relation(fields: [courseId], references: [id], onDelete: Cascade)
+  createdBy   User                @relation("AssignmentCreator", fields: [createdById], references: [id], onDelete: Cascade)
+  problems    AssignmentProblem[]
+  submissions Submission[]
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@index([courseId])
+  @@index([createdById])
+}
+
+model AssignmentProblem {
+  assignmentId String
+  problemId    String
+  maxPoints    Int @default(100)
+  order        Int?
+
+  assignment Assignment @relation(fields: [assignmentId], references: [id], onDelete: Cascade)
+  problem    Problem    @relation(fields: [problemId], references: [id], onDelete: Cascade)
+
+  @@id([assignmentId, problemId])
+  @@index([assignmentId])
+  @@index([problemId])
 }
 
 enum AnalysisStatus {

prisma/seed.ts

@@ -1731,6 +1731,125 @@ export async function main() {
       data: problem,
     });
   }
+
+  // Seed demo users for course/assignment MVP
+  const teacher = await prisma.user.upsert({
+    where: { email: "teacher@judge4c.local" },
+    update: {
+      name: "课程教师",
+      role: "TEACHER",
+    },
+    create: {
+      name: "课程教师",
+      email: "teacher@judge4c.local",
+      role: "TEACHER",
+    },
+  });
+
+  const students = await Promise.all(
+    ["student1@judge4c.local", "student2@judge4c.local"].map((email, index) =>
+      prisma.user.upsert({
+        where: { email },
+        update: {
+          name: `学生${index + 1}`,
+          role: "GUEST",
+        },
+        create: {
+          name: `学生${index + 1}`,
+          email,
+          role: "GUEST",
+        },
+      })
+    )
+  );
+
+  const selectedProblems = await prisma.problem.findMany({
+    orderBy: { displayId: "asc" },
+    take: 2,
+    select: { id: true },
+  });
+
+  if (selectedProblems.length > 0) {
+    let course = await prisma.course.findFirst({
+      where: {
+        title: "程序设计基础",
+        teacherId: teacher.id,
+      },
+    });
+
+    if (!course) {
+      course = await prisma.course.create({
+        data: {
+          title: "程序设计基础",
+          description: "课程作业 MVP 示例课程",
+          teacherId: teacher.id,
+        },
+      });
+    }
+
+    for (const student of students) {
+      await prisma.courseEnrollment.upsert({
+        where: {
+          courseId_userId: {
+            courseId: course.id,
+            userId: student.id,
+          },
+        },
+        update: {},
+        create: {
+          courseId: course.id,
+          userId: student.id,
+          role: "STUDENT",
+        },
+      });
+    }
+
+    const dueAt = new Date(Date.now() + 7 * 24 * 60 * 60 * 1000);
+    let assignment = await prisma.assignment.findFirst({
+      where: {
+        courseId: course.id,
+        title: "第一次编程作业",
+      },
+      select: { id: true },
+    });
+
+    if (!assignment) {
+      assignment = await prisma.assignment.create({
+        data: {
+          courseId: course.id,
+          title: "第一次编程作业",
+          description: "完成基础题目，熟悉在线评测流程",
+          dueAt,
+          published: true,
+          createdById: teacher.id,
+        },
+        select: { id: true },
+      });
+    } else {
+      await prisma.assignment.update({
+        where: { id: assignment.id },
+        data: {
+          dueAt,
+          published: true,
+          description: "完成基础题目，熟悉在线评测流程",
+        },
+      });
+    }
+
+    await prisma.assignmentProblem.deleteMany({
+      where: { assignmentId: assignment.id },
+    });
+
+    await prisma.assignmentProblem.createMany({
+      data: selectedProblems.map((problem, index) => ({
+        assignmentId: assignment.id,
+        problemId: problem.id,
+        maxPoints: 100,
+        order: index + 1,
+      })),
+      skipDuplicates: true,
+    });
+  }
 }
 
 main();

src/app/(protected)/dashboard/actions/assignment-stats.ts

@@ -0,0 +1,347 @@
+"use server";
+
+import prisma from "@/lib/prisma";
+import {
+  assertCourseManagePermission,
+  assertCourseStudentPermission,
+  assertStudent,
+  assertTeacherOrAdmin,
+  getAuthenticatedActor,
+} from "@/app/(protected)/dashboard/actions/course-auth";
+
+interface ProblemScoreRow {
+  problemId: string;
+  displayId: number;
+  title: string;
+  maxPoints: number;
+  earnedPoints: number;
+  solved: boolean;
+  attempts: number;
+  bestStatus: string;
+}
+
+function buildProblemScoreRows(
+  assignmentProblems: {
+    problemId: string;
+    maxPoints: number;
+    problem: {
+      displayId: number;
+      localizations: { content: string }[];
+    };
+  }[],
+  submissions: {
+    problemId: string;
+    status: string;
+  }[]
+): ProblemScoreRow[] {
+  const grouped = new Map<
+    string,
+    {
+      attempts: number;
+      solved: boolean;
+      bestStatus: string;
+    }
+  >();
+
+  for (const submission of submissions) {
+    const current = grouped.get(submission.problemId) ?? {
+      attempts: 0,
+      solved: false,
+      bestStatus: "PD",
+    };
+    current.attempts += 1;
+    if (submission.status === "AC") {
+      current.solved = true;
+      current.bestStatus = "AC";
+    } else if (!current.solved) {
+      current.bestStatus = submission.status;
+    }
+    grouped.set(submission.problemId, current);
+  }
+
+  return assignmentProblems.map((item) => {
+    const progress = grouped.get(item.problemId);
+    const solved = Boolean(progress?.solved);
+    return {
+      problemId: item.problemId,
+      displayId: item.problem.displayId,
+      title: item.problem.localizations[0]?.content ?? `题目${item.problem.displayId}`,
+      maxPoints: item.maxPoints,
+      earnedPoints: solved ? item.maxPoints : 0,
+      solved,
+      attempts: progress?.attempts ?? 0,
+      bestStatus: progress?.bestStatus ?? "-",
+    };
+  });
+}
+
+export async function getTeacherAssignmentStats(assignmentId: string) {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+
+  const assignment = await prisma.assignment.findUnique({
+    where: { id: assignmentId },
+    select: {
+      id: true,
+      title: true,
+      courseId: true,
+      dueAt: true,
+      published: true,
+      course: {
+        select: {
+          id: true,
+          title: true,
+          teacherId: true,
+          enrollments: {
+            select: {
+              userId: true,
+              user: {
+                select: {
+                  name: true,
+                  email: true,
+                },
+              },
+            },
+          },
+        },
+      },
+      problems: {
+        orderBy: [{ order: "asc" }, { problem: { displayId: "asc" } }],
+        select: {
+          problemId: true,
+          maxPoints: true,
+          problem: {
+            select: {
+              displayId: true,
+              localizations: {
+                where: { type: "TITLE", locale: "zh" },
+                select: { content: true },
+              },
+            },
+          },
+        },
+      },
+      submissions: {
+        select: {
+          userId: true,
+          problemId: true,
+          status: true,
+        },
+      },
+    },
+  });
+
+  if (!assignment) {
+    throw new Error("作业不存在");
+  }
+
+  await assertCourseManagePermission(assignment.courseId, actor);
+
+  const problemCount = assignment.problems.length;
+  const maxScore = assignment.problems.reduce(
+    (total, problem) => total + problem.maxPoints,
+    0
+  );
+
+  const submissionGroup = new Map<
+    string,
+    { userId: string; problemId: string; status: string }[]
+  >();
+  for (const submission of assignment.submissions) {
+    const bucket = submissionGroup.get(submission.userId) ?? [];
+    bucket.push(submission);
+    submissionGroup.set(submission.userId, bucket);
+  }
+
+  const students = assignment.course.enrollments.map((enrollment) => {
+    const rows = buildProblemScoreRows(
+      assignment.problems,
+      submissionGroup.get(enrollment.userId) ?? []
+    );
+    const score = rows.reduce((sum, row) => sum + row.earnedPoints, 0);
+    const solvedCount = rows.filter((row) => row.solved).length;
+    const completionPercent =
+      problemCount > 0 ? Math.round((solvedCount / problemCount) * 100) : 0;
+
+    return {
+      userId: enrollment.userId,
+      name: enrollment.user.name,
+      email: enrollment.user.email,
+      totalScore: score,
+      maxScore,
+      solvedCount,
+      problemCount,
+      completionPercent,
+      perProblem: rows,
+    };
+  });
+
+  const perProblemCoverage = assignment.problems.map((problem) => {
+    const solvedUsers = students.filter((student) =>
+      student.perProblem.some(
+        (row) => row.problemId === problem.problemId && row.solved
+      )
+    ).length;
+    const totalUsers = students.length;
+    return {
+      problemId: problem.problemId,
+      displayId: problem.problem.displayId,
+      title:
+        problem.problem.localizations[0]?.content ??
+        `题目${problem.problem.displayId}`,
+      solvedUsers,
+      totalUsers,
+      acCoverage:
+        totalUsers > 0 ? Math.round((solvedUsers / totalUsers) * 100) : 0,
+    };
+  });
+
+  return {
+    assignment: {
+      id: assignment.id,
+      title: assignment.title,
+      dueAt: assignment.dueAt,
+      published: assignment.published,
+    },
+    course: {
+      id: assignment.course.id,
+      title: assignment.course.title,
+    },
+    maxScore,
+    problemCount,
+    students,
+    perProblemCoverage,
+  };
+}
+
+export async function getStudentAssignmentSummary(assignmentId: string) {
+  const actor = await getAuthenticatedActor();
+  assertStudent(actor);
+
+  const assignment = await prisma.assignment.findUnique({
+    where: { id: assignmentId },
+    select: {
+      id: true,
+      title: true,
+      description: true,
+      dueAt: true,
+      opensAt: true,
+      published: true,
+      courseId: true,
+      course: {
+        select: {
+          id: true,
+          title: true,
+        },
+      },
+      problems: {
+        orderBy: [{ order: "asc" }, { problem: { displayId: "asc" } }],
+        select: {
+          problemId: true,
+          maxPoints: true,
+          problem: {
+            select: {
+              displayId: true,
+              localizations: {
+                where: { type: "TITLE", locale: "zh" },
+                select: { content: true },
+              },
+            },
+          },
+        },
+      },
+    },
+  });
+
+  if (!assignment) {
+    throw new Error("作业不存在");
+  }
+  if (!assignment.published) {
+    throw new Error("作业未发布");
+  }
+
+  await assertCourseStudentPermission(assignment.courseId, actor);
+
+  const submissions = await prisma.submission.findMany({
+    where: {
+      assignmentId,
+      userId: actor.id,
+    },
+    select: {
+      problemId: true,
+      status: true,
+    },
+  });
+
+  const rows = buildProblemScoreRows(assignment.problems, submissions);
+  const totalScore = rows.reduce((sum, row) => sum + row.earnedPoints, 0);
+  const maxScore = rows.reduce((sum, row) => sum + row.maxPoints, 0);
+  const solvedCount = rows.filter((row) => row.solved).length;
+  const completionPercent =
+    rows.length > 0 ? Math.round((solvedCount / rows.length) * 100) : 0;
+
+  return {
+    assignment: {
+      id: assignment.id,
+      title: assignment.title,
+      description: assignment.description,
+      dueAt: assignment.dueAt,
+      opensAt: assignment.opensAt,
+      published: assignment.published,
+    },
+    course: assignment.course,
+    totalScore,
+    maxScore,
+    solvedCount,
+    problemCount: rows.length,
+    completionPercent,
+    rows,
+  };
+}
+
+export async function listStudentAssignments(courseId: string) {
+  const actor = await getAuthenticatedActor();
+  assertStudent(actor);
+  await assertCourseStudentPermission(courseId, actor);
+
+  return prisma.assignment.findMany({
+    where: {
+      courseId,
+      published: true,
+    },
+    orderBy: [{ dueAt: "asc" }, { createdAt: "desc" }],
+    select: {
+      id: true,
+      title: true,
+      description: true,
+      opensAt: true,
+      dueAt: true,
+      _count: {
+        select: {
+          problems: true,
+        },
+      },
+    },
+  });
+}
+
+export async function getStudentCourseDetail(courseId: string) {
+  const actor = await getAuthenticatedActor();
+  assertStudent(actor);
+  await assertCourseStudentPermission(courseId, actor);
+
+  return prisma.course.findUnique({
+    where: { id: courseId },
+    select: {
+      id: true,
+      title: true,
+      description: true,
+      teacher: {
+        select: {
+          name: true,
+          email: true,
+        },
+      },
+    },
+  });
+}

src/app/(protected)/dashboard/actions/course-auth.ts

@@ -0,0 +1,104 @@
+import { auth } from "@/lib/auth";
+import prisma from "@/lib/prisma";
+import { Role } from "@/generated/client";
+
+export interface AuthenticatedActor {
+  id: string;
+  role: Role;
+  name: string | null;
+  email: string;
+}
+
+export async function getAuthenticatedActor(): Promise<AuthenticatedActor> {
+  const session = await auth();
+  const userId = session?.user?.id;
+
+  if (!userId) {
+    throw new Error("用户未登录");
+  }
+
+  const user = await prisma.user.findUnique({
+    where: { id: userId },
+    select: {
+      id: true,
+      role: true,
+      name: true,
+      email: true,
+    },
+  });
+
+  if (!user) {
+    throw new Error("用户不存在");
+  }
+
+  return user;
+}
+
+export function assertTeacherOrAdmin(actor: AuthenticatedActor) {
+  if (actor.role !== "TEACHER" && actor.role !== "ADMIN") {
+    throw new Error("无权限执行该操作");
+  }
+}
+
+export function assertStudent(actor: AuthenticatedActor) {
+  if (actor.role !== "GUEST") {
+    throw new Error("仅学生可访问");
+  }
+}
+
+export async function assertCourseManagePermission(
+  courseId: string,
+  actor: AuthenticatedActor
+) {
+  const course = await prisma.course.findUnique({
+    where: { id: courseId },
+    select: {
+      id: true,
+      teacherId: true,
+      title: true,
+    },
+  });
+
+  if (!course) {
+    throw new Error("课程不存在");
+  }
+
+  if (actor.role !== "ADMIN" && course.teacherId !== actor.id) {
+    throw new Error("无权限操作该课程");
+  }
+
+  return course;
+}
+
+export async function assertCourseStudentPermission(
+  courseId: string,
+  actor: AuthenticatedActor
+) {
+  const enrollment = await prisma.courseEnrollment.findUnique({
+    where: {
+      courseId_userId: {
+        courseId,
+        userId: actor.id,
+      },
+    },
+    select: {
+      course: {
+        select: {
+          id: true,
+          title: true,
+          archived: true,
+        },
+      },
+    },
+  });
+
+  if (!enrollment) {
+    throw new Error("你未加入该课程");
+  }
+
+  if (enrollment.course.archived) {
+    throw new Error("课程已归档");
+  }
+
+  return enrollment.course;
+}

src/app/(protected)/dashboard/actions/student-dashboard.ts

@@ -2,6 +2,7 @@
 
 import prisma from "@/lib/prisma";
 import { auth } from "@/lib/auth";
+import { assertStudent } from "./course-auth";
 
 export async function getStudentDashboardData() {
   try {
@@ -29,6 +30,12 @@ export async function getStudentDashboardData() {
     if (!currentUser) {
       throw new Error("用户不存在");
     }
+    assertStudent({
+      id: currentUser.id,
+      role: currentUser.role,
+      name: currentUser.name,
+      email: currentUser.email,
+    });
 
     // 获取所有已发布的题目（包含英文标题）
     const allProblems = await prisma.problem.findMany({

src/app/(protected)/dashboard/actions/teacher-assignments.ts

@@ -0,0 +1,315 @@
+"use server";
+
+import { revalidatePath } from "next/cache";
+import prisma from "@/lib/prisma";
+import {
+  assertCourseManagePermission,
+  assertTeacherOrAdmin,
+  getAuthenticatedActor,
+} from "@/app/(protected)/dashboard/actions/course-auth";
+
+interface AssignmentProblemInput {
+  problemId: string;
+  maxPoints: number;
+  order?: number;
+}
+
+interface CreateAssignmentInput {
+  courseId: string;
+  title: string;
+  description?: string;
+  opensAt?: string;
+  dueAt?: string;
+  published?: boolean;
+  problems: AssignmentProblemInput[];
+}
+
+interface UpdateAssignmentInput {
+  title?: string;
+  description?: string | null;
+  opensAt?: string | null;
+  dueAt?: string | null;
+  published?: boolean;
+  problems?: AssignmentProblemInput[];
+}
+
+function normalizePoints(points: number) {
+  const normalized = Number(points);
+  if (!Number.isFinite(normalized) || normalized <= 0) {
+    throw new Error("分值必须是正整数");
+  }
+  return Math.round(normalized);
+}
+
+async function validateProblems(problems: AssignmentProblemInput[]) {
+  if (!Array.isArray(problems) || problems.length === 0) {
+    throw new Error("作业至少需要一道题目");
+  }
+
+  const uniqueProblemIds = [...new Set(problems.map((item) => item.problemId))];
+  const existingProblems = await prisma.problem.findMany({
+    where: {
+      id: { in: uniqueProblemIds },
+      isPublished: true,
+    },
+    select: { id: true },
+  });
+
+  if (existingProblems.length !== uniqueProblemIds.length) {
+    throw new Error("题目不存在或未发布");
+  }
+}
+
+function parseDateValue(value?: string | null) {
+  if (!value) {
+    return null;
+  }
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) {
+    throw new Error("日期格式不合法");
+  }
+  return date;
+}
+
+export async function createAssignment(input: CreateAssignmentInput) {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+  await assertCourseManagePermission(input.courseId, actor);
+  await validateProblems(input.problems);
+
+  const title = input.title.trim();
+  if (!title) {
+    throw new Error("作业标题不能为空");
+  }
+
+  const opensAt = parseDateValue(input.opensAt);
+  const dueAt = parseDateValue(input.dueAt);
+
+  if (opensAt && dueAt && opensAt >= dueAt) {
+    throw new Error("截止时间必须晚于开始时间");
+  }
+
+  const assignment = await prisma.assignment.create({
+    data: {
+      courseId: input.courseId,
+      title,
+      description: input.description?.trim() || null,
+      opensAt,
+      dueAt,
+      published: Boolean(input.published),
+      createdById: actor.id,
+      problems: {
+        create: input.problems.map((item, index) => ({
+          problemId: item.problemId,
+          maxPoints: normalizePoints(item.maxPoints),
+          order: item.order ?? index + 1,
+        })),
+      },
+    },
+    select: {
+      id: true,
+      courseId: true,
+    },
+  });
+
+  revalidatePath(`/dashboard/teacher/courses/${assignment.courseId}`);
+  revalidatePath(
+    `/dashboard/teacher/courses/${assignment.courseId}/assignments/${assignment.id}`
+  );
+  revalidatePath("/dashboard/student/courses");
+
+  return assignment;
+}
+
+export async function updateAssignment(
+  assignmentId: string,
+  input: UpdateAssignmentInput
+) {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+
+  const assignment = await prisma.assignment.findUnique({
+    where: { id: assignmentId },
+    select: { id: true, courseId: true },
+  });
+
+  if (!assignment) {
+    throw new Error("作业不存在");
+  }
+
+  await assertCourseManagePermission(assignment.courseId, actor);
+
+  const nextData: {
+    title?: string;
+    description?: string | null;
+    opensAt?: Date | null;
+    dueAt?: Date | null;
+    published?: boolean;
+  } = {};
+
+  if (typeof input.title === "string") {
+    const title = input.title.trim();
+    if (!title) {
+      throw new Error("作业标题不能为空");
+    }
+    nextData.title = title;
+  }
+  if (typeof input.description !== "undefined") {
+    nextData.description = input.description?.trim() || null;
+  }
+  if (typeof input.opensAt !== "undefined") {
+    nextData.opensAt = parseDateValue(input.opensAt);
+  }
+  if (typeof input.dueAt !== "undefined") {
+    nextData.dueAt = parseDateValue(input.dueAt);
+  }
+  if (typeof input.published === "boolean") {
+    nextData.published = input.published;
+  }
+
+  if (nextData.opensAt && nextData.dueAt && nextData.opensAt >= nextData.dueAt) {
+    throw new Error("截止时间必须晚于开始时间");
+  }
+
+  await prisma.assignment.update({
+    where: { id: assignmentId },
+    data: nextData,
+  });
+
+  if (input.problems) {
+    await validateProblems(input.problems);
+    await prisma.assignmentProblem.deleteMany({
+      where: { assignmentId },
+    });
+    await prisma.assignmentProblem.createMany({
+      data: input.problems.map((item, index) => ({
+        assignmentId,
+        problemId: item.problemId,
+        maxPoints: normalizePoints(item.maxPoints),
+        order: item.order ?? index + 1,
+      })),
+      skipDuplicates: true,
+    });
+  }
+
+  revalidatePath(`/dashboard/teacher/courses/${assignment.courseId}`);
+  revalidatePath(
+    `/dashboard/teacher/courses/${assignment.courseId}/assignments/${assignmentId}`
+  );
+  revalidatePath(
+    `/dashboard/student/courses/${assignment.courseId}/assignments/${assignmentId}`
+  );
+}
+
+export async function publishAssignment(
+  assignmentId: string,
+  published: boolean = true
+) {
+  return updateAssignment(assignmentId, { published });
+}
+
+export async function getAssignmentDetail(assignmentId: string) {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+
+  const assignment = await prisma.assignment.findUnique({
+    where: { id: assignmentId },
+    select: {
+      id: true,
+      title: true,
+      description: true,
+      opensAt: true,
+      dueAt: true,
+      published: true,
+      courseId: true,
+      course: {
+        select: {
+          id: true,
+          title: true,
+          teacherId: true,
+          teacher: {
+            select: {
+              name: true,
+              email: true,
+            },
+          },
+        },
+      },
+      problems: {
+        orderBy: [{ order: "asc" }, { problem: { displayId: "asc" } }],
+        select: {
+          problemId: true,
+          maxPoints: true,
+          order: true,
+          problem: {
+            select: {
+              displayId: true,
+              difficulty: true,
+              localizations: {
+                where: { type: "TITLE", locale: "zh" },
+                select: { content: true },
+              },
+            },
+          },
+        },
+      },
+      _count: {
+        select: {
+          submissions: true,
+        },
+      },
+    },
+  });
+
+  if (!assignment) {
+    throw new Error("作业不存在");
+  }
+
+  await assertCourseManagePermission(assignment.courseId, actor);
+  return assignment;
+}
+
+export async function listCourseAssignments(courseId: string) {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+  await assertCourseManagePermission(courseId, actor);
+
+  return prisma.assignment.findMany({
+    where: { courseId },
+    orderBy: [{ dueAt: "asc" }, { createdAt: "desc" }],
+    select: {
+      id: true,
+      title: true,
+      description: true,
+      opensAt: true,
+      dueAt: true,
+      published: true,
+      createdAt: true,
+      _count: {
+        select: {
+          problems: true,
+          submissions: true,
+        },
+      },
+    },
+  });
+}
+
+export async function listAssignableProblems() {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+
+  return prisma.problem.findMany({
+    where: { isPublished: true },
+    orderBy: { displayId: "asc" },
+    select: {
+      id: true,
+      displayId: true,
+      difficulty: true,
+      localizations: {
+        where: { type: "TITLE", locale: "zh" },
+        select: { content: true },
+      },
+    },
+  });
+}

src/app/(protected)/dashboard/actions/teacher-courses.ts

@@ -0,0 +1,272 @@
+"use server";
+
+import { revalidatePath } from "next/cache";
+import prisma from "@/lib/prisma";
+import {
+  assertCourseManagePermission,
+  assertStudent,
+  assertTeacherOrAdmin,
+  getAuthenticatedActor,
+} from "@/app/(protected)/dashboard/actions/course-auth";
+
+interface CreateCourseInput {
+  title: string;
+  description?: string;
+  teacherId?: string;
+}
+
+interface UpdateCourseInput {
+  title?: string;
+  description?: string | null;
+  archived?: boolean;
+}
+
+export async function listTeacherCourses() {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+
+  return prisma.course.findMany({
+    where: actor.role === "ADMIN" ? undefined : { teacherId: actor.id },
+    orderBy: { createdAt: "desc" },
+    select: {
+      id: true,
+      title: true,
+      description: true,
+      archived: true,
+      createdAt: true,
+      updatedAt: true,
+      teacher: {
+        select: {
+          id: true,
+          name: true,
+          email: true,
+        },
+      },
+      _count: {
+        select: {
+          enrollments: true,
+          assignments: true,
+        },
+      },
+    },
+  });
+}
+
+export async function createCourse(input: CreateCourseInput) {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+
+  const title = input.title.trim();
+  if (!title) {
+    throw new Error("课程标题不能为空");
+  }
+
+  let teacherId = actor.id;
+  if (actor.role === "ADMIN" && input.teacherId) {
+    const teacher = await prisma.user.findUnique({
+      where: { id: input.teacherId },
+      select: { id: true, role: true },
+    });
+    if (!teacher || teacher.role !== "TEACHER") {
+      throw new Error("指定教师不存在");
+    }
+    teacherId = teacher.id;
+  }
+
+  const course = await prisma.course.create({
+    data: {
+      title,
+      description: input.description?.trim() || null,
+      teacherId,
+    },
+    select: { id: true },
+  });
+
+  revalidatePath("/dashboard/teacher/courses");
+  revalidatePath("/dashboard/student/courses");
+  return course;
+}
+
+export async function updateCourse(courseId: string, input: UpdateCourseInput) {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+  await assertCourseManagePermission(courseId, actor);
+
+  const nextData: UpdateCourseInput = {};
+  if (typeof input.title === "string") {
+    const title = input.title.trim();
+    if (!title) {
+      throw new Error("课程标题不能为空");
+    }
+    nextData.title = title;
+  }
+  if (typeof input.description !== "undefined") {
+    nextData.description = input.description?.trim() || null;
+  }
+  if (typeof input.archived === "boolean") {
+    nextData.archived = input.archived;
+  }
+
+  await prisma.course.update({
+    where: { id: courseId },
+    data: nextData,
+  });
+
+  revalidatePath("/dashboard/teacher/courses");
+  revalidatePath(`/dashboard/teacher/courses/${courseId}`);
+  revalidatePath("/dashboard/student/courses");
+}
+
+export async function enrollStudents(courseId: string, studentIds: string[]) {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+  await assertCourseManagePermission(courseId, actor);
+
+  const uniqueStudentIds = [...new Set(studentIds.filter(Boolean))];
+  if (uniqueStudentIds.length === 0) {
+    return { enrolled: 0 };
+  }
+
+  const students = await prisma.user.findMany({
+    where: {
+      id: { in: uniqueStudentIds },
+      role: "GUEST",
+    },
+    select: { id: true },
+  });
+
+  if (students.length === 0) {
+    throw new Error("未找到可加入课程的学生");
+  }
+
+  await prisma.courseEnrollment.createMany({
+    data: students.map((student) => ({
+      courseId,
+      userId: student.id,
+      role: "STUDENT",
+    })),
+    skipDuplicates: true,
+  });
+
+  revalidatePath(`/dashboard/teacher/courses/${courseId}`);
+  revalidatePath("/dashboard/student/courses");
+
+  return { enrolled: students.length };
+}
+
+export async function removeStudentFromCourse(courseId: string, studentId: string) {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+  await assertCourseManagePermission(courseId, actor);
+
+  await prisma.courseEnrollment.deleteMany({
+    where: {
+      courseId,
+      userId: studentId,
+    },
+  });
+
+  revalidatePath(`/dashboard/teacher/courses/${courseId}`);
+  revalidatePath("/dashboard/student/courses");
+}
+
+export async function getCourseStudents(courseId: string) {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+  await assertCourseManagePermission(courseId, actor);
+
+  return prisma.courseEnrollment.findMany({
+    where: { courseId },
+    orderBy: { createdAt: "asc" },
+    select: {
+      user: {
+        select: {
+          id: true,
+          name: true,
+          email: true,
+        },
+      },
+      role: true,
+      createdAt: true,
+    },
+  });
+}
+
+export async function listAvailableStudents() {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+
+  return prisma.user.findMany({
+    where: { role: "GUEST" },
+    orderBy: { createdAt: "desc" },
+    select: {
+      id: true,
+      name: true,
+      email: true,
+    },
+  });
+}
+
+export async function getTeacherCourseDetail(courseId: string) {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+  await assertCourseManagePermission(courseId, actor);
+
+  return prisma.course.findUnique({
+    where: { id: courseId },
+    select: {
+      id: true,
+      title: true,
+      description: true,
+      archived: true,
+      createdAt: true,
+      updatedAt: true,
+      teacher: {
+        select: {
+          id: true,
+          name: true,
+          email: true,
+        },
+      },
+      _count: {
+        select: {
+          enrollments: true,
+          assignments: true,
+        },
+      },
+    },
+  });
+}
+
+export async function listStudentCourses() {
+  const actor = await getAuthenticatedActor();
+  assertStudent(actor);
+
+  return prisma.courseEnrollment.findMany({
+    where: { userId: actor.id },
+    orderBy: { createdAt: "desc" },
+    select: {
+      course: {
+        select: {
+          id: true,
+          title: true,
+          description: true,
+          archived: true,
+          teacher: {
+            select: {
+              id: true,
+              name: true,
+              email: true,
+            },
+          },
+          _count: {
+            select: {
+              assignments: true,
+            },
+          },
+        },
+      },
+      createdAt: true,
+    },
+  });
+}

src/app/(protected)/dashboard/actions/teacher-dashboard.ts

@@ -3,6 +3,7 @@
 import prisma from "@/lib/prisma";
 import { getLocale } from "next-intl/server";
 import { Locale, Status, ProblemLocalization } from "@/generated/client";
+import { assertTeacherOrAdmin, getAuthenticatedActor } from "./course-auth";
 
 const getLocalizedTitle = (
   localizations: ProblemLocalization[],
@@ -41,6 +42,9 @@ export interface DifficultProblemData {
 export async function getProblemCompletionData(): Promise<
   ProblemCompletionData[]
 > {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+
   // 获取所有提交记录，按题目分组统计
   const submissions = await prisma.submission.findMany({
     include: {
@@ -124,6 +128,9 @@ export async function getProblemCompletionData(): Promise<
 export async function getDifficultProblemsData(): Promise<
   DifficultProblemData[]
 > {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+
   // 获取所有测试用例结果
   const testcaseResults = await prisma.testcaseResult.findMany({
     include: {
@@ -207,6 +214,9 @@ export async function getDifficultProblemsData(): Promise<
 }
 
 export async function getDashboardStats() {
+  const actor = await getAuthenticatedActor();
+  assertTeacherOrAdmin(actor);
+
   const [problemData, difficultProblems] = await Promise.all([
     getProblemCompletionData(),
     getDifficultProblemsData(),

src/app/(protected)/dashboard/page.tsx

@@ -260,6 +260,11 @@ export default async function DashboardPage() {
               href: "/dashboard/teacher/dashboard",
               icon: BarChart3,
             },
+            {
+              label: "课程管理",
+              href: "/dashboard/teacher/courses",
+              icon: BookOpen,
+            },
           ],
         };
       default:
@@ -292,6 +297,11 @@ export default async function DashboardPage() {
               href: "/dashboard/student/dashboard",
               icon: TrendingUp,
             },
+            {
+              label: "我的课程",
+              href: "/dashboard/student/courses",
+              icon: GraduationCapIcon,
+            },
             { label: "开始做题", href: "/problemset", icon: BookOpen },
             { label: "个人设置", href: "/dashboard/management", icon: Target },
           ],

src/app/(protected)/dashboard/student/courses/[courseId]/assignments/[assignmentId]/page.tsx

@@ -0,0 +1,99 @@
+"use client";
+
+import Link from "next/link";
+import { useParams } from "next/navigation";
+import { useEffect, useState } from "react";
+import { Button } from "@/components/ui/button";
+import { Progress } from "@/components/ui/progress";
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
+import { getStudentAssignmentSummary } from "@/app/(protected)/dashboard/actions/assignment-stats";
+
+export default function StudentAssignmentDetailPage() {
+  const params = useParams<{ assignmentId: string }>();
+  const assignmentId = params.assignmentId;
+  const [error, setError] = useState<string | null>(null);
+  const [summary, setSummary] = useState<Awaited<
+    ReturnType<typeof getStudentAssignmentSummary>
+  > | null>(null);
+
+  useEffect(() => {
+    const loadData = async () => {
+      try {
+        const data = await getStudentAssignmentSummary(assignmentId);
+        setSummary(data);
+      } catch (e) {
+        setError(e instanceof Error ? e.message : "加载作业失败");
+      }
+    };
+    loadData();
+  }, [assignmentId]);
+
+  if (!summary) {
+    return <div className="p-6 text-sm text-muted-foreground">加载中...</div>;
+  }
+
+  return (
+    <div className="space-y-6 p-6">
+      <Card>
+        <CardHeader>
+          <CardTitle>{summary.assignment.title}</CardTitle>
+          <CardDescription>
+            {summary.assignment.description || "暂无作业说明"}
+          </CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-2">
+          <p className="text-sm">
+            总分：{summary.totalScore}/{summary.maxScore}
+          </p>
+          <p className="text-sm">
+            完成：{summary.solvedCount}/{summary.problemCount}
+          </p>
+          <Progress value={summary.completionPercent} className="w-full" />
+          <p className="text-xs text-muted-foreground">
+            完成率 {summary.completionPercent}%
+            {summary.assignment.dueAt
+              ? ` · 截止 ${new Date(summary.assignment.dueAt).toLocaleString()}`
+              : ""}
+          </p>
+          {error ? <p className="text-sm text-red-500">{error}</p> : null}
+        </CardContent>
+      </Card>
+
+      <Card>
+        <CardHeader>
+          <CardTitle>题目列表</CardTitle>
+          <CardDescription>进入题目后会自动按本作业统计提交与得分</CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-3">
+          {summary.rows.map((row) => (
+            <div
+              key={row.problemId}
+              className="flex items-center justify-between rounded border p-3"
+            >
+              <div>
+                <p className="font-medium">
+                  #{row.displayId} {row.title}
+                </p>
+                <p className="text-sm text-muted-foreground">
+                  得分 {row.earnedPoints}/{row.maxPoints} · 状态 {row.bestStatus} ·
+                  提交 {row.attempts} 次
+                </p>
+              </div>
+              <Button asChild variant={row.solved ? "secondary" : "outline"}>
+                <Link href={`/problems/${row.problemId}?assignmentId=${assignmentId}`}>
+                  {row.solved ? "继续练习" : "开始做题"}
+                </Link>
+              </Button>
+            </div>
+          ))}
+        </CardContent>
+      </Card>
+    </div>
+  );
+}

src/app/(protected)/dashboard/student/courses/[courseId]/page.tsx

@@ -0,0 +1,100 @@
+"use client";
+
+import Link from "next/link";
+import { useParams } from "next/navigation";
+import { useEffect, useState } from "react";
+import { Button } from "@/components/ui/button";
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
+import {
+  getStudentCourseDetail,
+  listStudentAssignments,
+} from "@/app/(protected)/dashboard/actions/assignment-stats";
+
+export default function StudentCourseDetailPage() {
+  const params = useParams<{ courseId: string }>();
+  const courseId = params.courseId;
+  const [error, setError] = useState<string | null>(null);
+  const [course, setCourse] = useState<Awaited<
+    ReturnType<typeof getStudentCourseDetail>
+  > | null>(null);
+  const [assignments, setAssignments] = useState<Awaited<
+    ReturnType<typeof listStudentAssignments>
+  >>([]);
+
+  useEffect(() => {
+    const loadData = async () => {
+      try {
+        const [courseData, assignmentData] = await Promise.all([
+          getStudentCourseDetail(courseId),
+          listStudentAssignments(courseId),
+        ]);
+        setCourse(courseData);
+        setAssignments(assignmentData);
+      } catch (e) {
+        setError(e instanceof Error ? e.message : "加载课程失败");
+      }
+    };
+    loadData();
+  }, [courseId]);
+
+  if (!course) {
+    return <div className="p-6 text-sm text-muted-foreground">加载中...</div>;
+  }
+
+  return (
+    <div className="space-y-6 p-6">
+      <Card>
+        <CardHeader>
+          <CardTitle>{course.title}</CardTitle>
+          <CardDescription>
+            {course.description || "暂无课程简介"} · 教师：
+            {course.teacher.name || course.teacher.email}
+          </CardDescription>
+        </CardHeader>
+      </Card>
+
+      <Card>
+        <CardHeader>
+          <CardTitle>作业列表</CardTitle>
+          <CardDescription>点击进入作业查看得分并开始做题</CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-3">
+          {error ? <p className="text-sm text-red-500">{error}</p> : null}
+          {assignments.length === 0 ? (
+            <p className="text-sm text-muted-foreground">暂无已发布作业</p>
+          ) : (
+            assignments.map((assignment) => (
+              <div
+                key={assignment.id}
+                className="flex items-center justify-between rounded border p-3"
+              >
+                <div>
+                  <p className="font-medium">{assignment.title}</p>
+                  <p className="text-sm text-muted-foreground">
+                    题目 {assignment._count.problems} 道
+                    {assignment.dueAt
+                      ? ` · 截止 ${new Date(assignment.dueAt).toLocaleString()}`
+                      : " · 无截止时间"}
+                  </p>
+                </div>
+                <Button asChild variant="outline">
+                  <Link
+                    href={`/dashboard/student/courses/${courseId}/assignments/${assignment.id}`}
+                  >
+                    进入作业
+                  </Link>
+                </Button>
+              </div>
+            ))
+          )}
+        </CardContent>
+      </Card>
+    </div>
+  );
+}

src/app/(protected)/dashboard/student/courses/layout.tsx

@@ -0,0 +1,9 @@
+import { ProtectedLayout } from "@/features/dashboard/layouts/protected-layout";
+
+export default async function StudentCoursesLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  return <ProtectedLayout roles={["GUEST"]}>{children}</ProtectedLayout>;
+}

src/app/(protected)/dashboard/student/courses/page.tsx

@@ -0,0 +1,72 @@
+"use client";
+
+import Link from "next/link";
+import { useEffect, useState } from "react";
+import { Button } from "@/components/ui/button";
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
+import { listStudentCourses } from "@/app/(protected)/dashboard/actions/teacher-courses";
+
+export default function StudentCoursesPage() {
+  const [courses, setCourses] = useState<Awaited<
+    ReturnType<typeof listStudentCourses>
+  >>([]);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    const loadCourses = async () => {
+      try {
+        const data = await listStudentCourses();
+        setCourses(data);
+      } catch (e) {
+        setError(e instanceof Error ? e.message : "加载课程失败");
+      }
+    };
+    loadCourses();
+  }, []);
+
+  return (
+    <div className="space-y-6 p-6">
+      <Card>
+        <CardHeader>
+          <CardTitle>我的课程</CardTitle>
+          <CardDescription>进入课程查看作业、截止时间和成绩</CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-3">
+          {error ? <p className="text-sm text-red-500">{error}</p> : null}
+          {courses.length === 0 ? (
+            <p className="text-sm text-muted-foreground">暂无已加入课程</p>
+          ) : (
+            courses.map((item) => (
+              <div
+                key={item.course.id}
+                className="flex items-center justify-between rounded-md border p-3"
+              >
+                <div className="space-y-1">
+                  <p className="font-medium">{item.course.title}</p>
+                  <p className="text-sm text-muted-foreground">
+                    {item.course.description || "暂无课程简介"}
+                  </p>
+                  <p className="text-xs text-muted-foreground">
+                    教师：{item.course.teacher.name || item.course.teacher.email} ·
+                    作业 {item.course._count.assignments} 个
+                  </p>
+                </div>
+                <Button asChild variant="outline">
+                  <Link href={`/dashboard/student/courses/${item.course.id}`}>
+                    进入课程
+                  </Link>
+                </Button>
+              </div>
+            ))
+          )}
+        </CardContent>
+      </Card>
+    </div>
+  );
+}

src/app/(protected)/dashboard/teacher/courses/[courseId]/assignments/[assignmentId]/page.tsx

@@ -0,0 +1,164 @@
+"use client";
+
+import { useParams } from "next/navigation";
+import { useCallback, useEffect, useState, useTransition } from "react";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
+import {
+  getAssignmentDetail,
+  updateAssignment,
+} from "@/app/(protected)/dashboard/actions/teacher-assignments";
+import { getTeacherAssignmentStats } from "@/app/(protected)/dashboard/actions/assignment-stats";
+
+export default function TeacherAssignmentDetailPage() {
+  const params = useParams<{ assignmentId: string }>();
+  const assignmentId = params.assignmentId;
+  const [error, setError] = useState<string | null>(null);
+  const [isPending, startTransition] = useTransition();
+
+  const [detail, setDetail] = useState<Awaited<
+    ReturnType<typeof getAssignmentDetail>
+  > | null>(null);
+  const [stats, setStats] = useState<Awaited<
+    ReturnType<typeof getTeacherAssignmentStats>
+  > | null>(null);
+  const [title, setTitle] = useState("");
+  const [dueAt, setDueAt] = useState("");
+
+  const loadData = useCallback(async () => {
+    try {
+      const [assignmentDetail, assignmentStats] = await Promise.all([
+        getAssignmentDetail(assignmentId),
+        getTeacherAssignmentStats(assignmentId),
+      ]);
+      setDetail(assignmentDetail);
+      setStats(assignmentStats);
+      setTitle(assignmentDetail.title);
+      setDueAt(
+        assignmentDetail.dueAt
+          ? new Date(assignmentDetail.dueAt).toISOString().slice(0, 16)
+          : ""
+      );
+    } catch (e) {
+      setError(e instanceof Error ? e.message : "加载作业失败");
+    }
+  }, [assignmentId]);
+
+  useEffect(() => {
+    loadData();
+  }, [loadData]);
+
+  const handleSave = () => {
+    startTransition(async () => {
+      try {
+        await updateAssignment(assignmentId, {
+          title,
+          dueAt: dueAt || null,
+        });
+        await loadData();
+      } catch (e) {
+        setError(e instanceof Error ? e.message : "更新作业失败");
+      }
+    });
+  };
+
+  const handleTogglePublish = () => {
+    if (!detail) return;
+    startTransition(async () => {
+      try {
+        await updateAssignment(assignmentId, {
+          published: !detail.published,
+        });
+        await loadData();
+      } catch (e) {
+        setError(e instanceof Error ? e.message : "更新发布状态失败");
+      }
+    });
+  };
+
+  if (!detail || !stats) {
+    return <div className="p-6 text-sm text-muted-foreground">加载中...</div>;
+  }
+
+  return (
+    <div className="space-y-6 p-6">
+      <Card>
+        <CardHeader>
+          <CardTitle>作业设置</CardTitle>
+          <CardDescription>
+            课程：{detail.course.title} · 当前状态：
+            {detail.published ? "已发布" : "未发布"}
+          </CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-3">
+          <Input value={title} onChange={(e) => setTitle(e.target.value)} />
+          <Input
+            type="datetime-local"
+            value={dueAt}
+            onChange={(e) => setDueAt(e.target.value)}
+          />
+          <div className="flex gap-2">
+            <Button onClick={handleSave} disabled={isPending || !title.trim()}>
+              {isPending ? "保存中..." : "保存设置"}
+            </Button>
+            <Button onClick={handleTogglePublish} variant="outline" disabled={isPending}>
+              {detail.published ? "设为未发布" : "发布作业"}
+            </Button>
+          </div>
+          {error ? <p className="text-sm text-red-500">{error}</p> : null}
+        </CardContent>
+      </Card>
+
+      <Card>
+        <CardHeader>
+          <CardTitle>班级成绩概览</CardTitle>
+          <CardDescription>
+            满分 {stats.maxScore} 分 · 共 {stats.problemCount} 题
+          </CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-3">
+          {stats.students.length === 0 ? (
+            <p className="text-sm text-muted-foreground">暂无选课学生</p>
+          ) : (
+            stats.students.map((student) => (
+              <div key={student.userId} className="rounded border p-3">
+                <p className="font-medium">
+                  {student.name || "未命名"} ({student.email})
+                </p>
+                <p className="text-sm text-muted-foreground">
+                  总分 {student.totalScore}/{student.maxScore} · 完成率{" "}
+                  {student.completionPercent}%
+                </p>
+              </div>
+            ))
+          )}
+        </CardContent>
+      </Card>
+
+      <Card>
+        <CardHeader>
+          <CardTitle>每题 AC 覆盖率</CardTitle>
+        </CardHeader>
+        <CardContent className="space-y-2">
+          {stats.perProblemCoverage.map((item) => (
+            <div key={item.problemId} className="rounded border p-3">
+              <p className="font-medium">
+                #{item.displayId} {item.title}
+              </p>
+              <p className="text-sm text-muted-foreground">
+                {item.solvedUsers}/{item.totalUsers} 人通过 · 覆盖率 {item.acCoverage}%
+              </p>
+            </div>
+          ))}
+        </CardContent>
+      </Card>
+    </div>
+  );
+}

src/app/(protected)/dashboard/teacher/courses/[courseId]/page.tsx

@@ -0,0 +1,320 @@
+"use client";
+
+import Link from "next/link";
+import { useParams } from "next/navigation";
+import { useCallback, useEffect, useMemo, useState, useTransition } from "react";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Checkbox } from "@/components/ui/checkbox";
+import { Textarea } from "@/components/ui/textarea";
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
+import {
+  enrollStudents,
+  getCourseStudents,
+  getTeacherCourseDetail,
+  listAvailableStudents,
+} from "@/app/(protected)/dashboard/actions/teacher-courses";
+import {
+  createAssignment,
+  listAssignableProblems,
+  listCourseAssignments,
+} from "@/app/(protected)/dashboard/actions/teacher-assignments";
+
+interface SelectableStudent {
+  id: string;
+  name: string | null;
+  email: string;
+}
+
+interface SelectableProblem {
+  id: string;
+  displayId: number;
+  difficulty: string;
+  localizations: { content: string }[];
+}
+
+export default function TeacherCourseDetailPage() {
+  const params = useParams<{ courseId: string }>();
+  const courseId = params.courseId;
+  const [error, setError] = useState<string | null>(null);
+  const [isPending, startTransition] = useTransition();
+
+  const [course, setCourse] = useState<Awaited<
+    ReturnType<typeof getTeacherCourseDetail>
+  > | null>(null);
+  const [students, setStudents] = useState<Awaited<ReturnType<typeof getCourseStudents>>>([]);
+  const [availableStudents, setAvailableStudents] = useState<SelectableStudent[]>([]);
+  const [assignments, setAssignments] = useState<Awaited<
+    ReturnType<typeof listCourseAssignments>
+  >>([]);
+  const [problems, setProblems] = useState<SelectableProblem[]>([]);
+
+  const [selectedStudents, setSelectedStudents] = useState<string[]>([]);
+  const [assignmentTitle, setAssignmentTitle] = useState("");
+  const [assignmentDescription, setAssignmentDescription] = useState("");
+  const [assignmentDueAt, setAssignmentDueAt] = useState("");
+  const [selectedProblems, setSelectedProblems] = useState<
+    Record<string, number>
+  >({});
+
+  const selectedProblemIds = useMemo(
+    () => Object.keys(selectedProblems),
+    [selectedProblems]
+  );
+
+  const loadData = useCallback(async () => {
+    try {
+      const [courseData, studentsData, allStudents, assignmentData, problemData] =
+        await Promise.all([
+          getTeacherCourseDetail(courseId),
+          getCourseStudents(courseId),
+          listAvailableStudents(),
+          listCourseAssignments(courseId),
+          listAssignableProblems(),
+        ]);
+      setCourse(courseData);
+      setStudents(studentsData);
+      setAvailableStudents(allStudents);
+      setAssignments(assignmentData);
+      setProblems(problemData);
+    } catch (e) {
+      setError(e instanceof Error ? e.message : "加载课程数据失败");
+    }
+  }, [courseId]);
+
+  useEffect(() => {
+    loadData();
+  }, [loadData]);
+
+  const handleEnrollStudents = () => {
+    if (selectedStudents.length === 0) {
+      return;
+    }
+    setError(null);
+    startTransition(async () => {
+      try {
+        await enrollStudents(courseId, selectedStudents);
+        setSelectedStudents([]);
+        await loadData();
+      } catch (e) {
+        setError(e instanceof Error ? e.message : "添加学生失败");
+      }
+    });
+  };
+
+  const handleCreateAssignment = () => {
+    if (!assignmentTitle.trim() || selectedProblemIds.length === 0) {
+      return;
+    }
+    setError(null);
+    startTransition(async () => {
+      try {
+        await createAssignment({
+          courseId,
+          title: assignmentTitle,
+          description: assignmentDescription,
+          dueAt: assignmentDueAt || undefined,
+          published: true,
+          problems: selectedProblemIds.map((problemId, index) => ({
+            problemId,
+            maxPoints: selectedProblems[problemId] ?? 100,
+            order: index + 1,
+          })),
+        });
+        setAssignmentTitle("");
+        setAssignmentDescription("");
+        setAssignmentDueAt("");
+        setSelectedProblems({});
+        await loadData();
+      } catch (e) {
+        setError(e instanceof Error ? e.message : "创建作业失败");
+      }
+    });
+  };
+
+  const toggleStudent = (studentId: string, checked: boolean) => {
+    setSelectedStudents((prev) =>
+      checked ? [...prev, studentId] : prev.filter((id) => id !== studentId)
+    );
+  };
+
+  const toggleProblem = (problemId: string, checked: boolean) => {
+    setSelectedProblems((prev) => {
+      if (!checked) {
+        const next = { ...prev };
+        delete next[problemId];
+        return next;
+      }
+      return { ...prev, [problemId]: prev[problemId] ?? 100 };
+    });
+  };
+
+  if (!course) {
+    return <div className="p-6 text-sm text-muted-foreground">加载中...</div>;
+  }
+
+  return (
+    <div className="space-y-6 p-6">
+      <Card>
+        <CardHeader>
+          <CardTitle>{course.title}</CardTitle>
+          <CardDescription>
+            {course.description || "暂无课程简介"} · 学生 {course._count.enrollments} 人 ·
+            作业 {course._count.assignments} 个
+          </CardDescription>
+        </CardHeader>
+      </Card>
+
+      <Card>
+        <CardHeader>
+          <CardTitle>学生管理</CardTitle>
+          <CardDescription>勾选学生后加入课程</CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-4">
+          <div className="grid gap-2 md:grid-cols-2">
+            {availableStudents.map((student) => (
+              <label
+                key={student.id}
+                className="flex items-center gap-2 rounded-md border p-2 text-sm"
+              >
+                <Checkbox
+                  checked={selectedStudents.includes(student.id)}
+                  onCheckedChange={(checked) =>
+                    toggleStudent(student.id, checked === true)
+                  }
+                />
+                <span>
+                  {student.name || "未命名"} ({student.email})
+                </span>
+              </label>
+            ))}
+          </div>
+          <Button
+            onClick={handleEnrollStudents}
+            disabled={isPending || selectedStudents.length === 0}
+          >
+            {isPending ? "处理中..." : "加入课程"}
+          </Button>
+
+          <div className="rounded-md border p-3">
+            <p className="mb-2 text-sm font-medium">已加入学生</p>
+            {students.length === 0 ? (
+              <p className="text-sm text-muted-foreground">暂无学生</p>
+            ) : (
+              students.map((item) => (
+                <p key={item.user.id} className="text-sm">
+                  {item.user.name || "未命名"} ({item.user.email})
+                </p>
+              ))
+            )}
+          </div>
+        </CardContent>
+      </Card>
+
+      <Card>
+        <CardHeader>
+          <CardTitle>创建作业</CardTitle>
+          <CardDescription>选择题目并设置每题分值</CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-3">
+          <Input
+            value={assignmentTitle}
+            onChange={(e) => setAssignmentTitle(e.target.value)}
+            placeholder="作业标题"
+          />
+          <Textarea
+            value={assignmentDescription}
+            onChange={(e) => setAssignmentDescription(e.target.value)}
+            placeholder="作业说明（可选）"
+          />
+          <Input
+            type="datetime-local"
+            value={assignmentDueAt}
+            onChange={(e) => setAssignmentDueAt(e.target.value)}
+          />
+          <div className="space-y-2 rounded-md border p-3">
+            {problems.map((problem) => {
+              const selected = selectedProblemIds.includes(problem.id);
+              return (
+                <div key={problem.id} className="space-y-2 rounded border p-2">
+                  <label className="flex items-center gap-2 text-sm">
+                    <Checkbox
+                      checked={selected}
+                      onCheckedChange={(checked) =>
+                        toggleProblem(problem.id, checked === true)
+                      }
+                    />
+                    <span>
+                      #{problem.displayId}{" "}
+                      {problem.localizations[0]?.content || "未命名题目"} (
+                      {problem.difficulty})
+                    </span>
+                  </label>
+                  {selected ? (
+                    <Input
+                      type="number"
+                      min={1}
+                      value={selectedProblems[problem.id] ?? 100}
+                      onChange={(e) =>
+                        setSelectedProblems((prev) => ({
+                          ...prev,
+                          [problem.id]: Number(e.target.value || 100),
+                        }))
+                      }
+                    />
+                  ) : null}
+                </div>
+              );
+            })}
+          </div>
+          <Button
+            onClick={handleCreateAssignment}
+            disabled={isPending || !assignmentTitle.trim() || selectedProblemIds.length === 0}
+          >
+            {isPending ? "创建中..." : "发布作业"}
+          </Button>
+          {error ? <p className="text-sm text-red-500">{error}</p> : null}
+        </CardContent>
+      </Card>
+
+      <Card>
+        <CardHeader>
+          <CardTitle>作业列表</CardTitle>
+        </CardHeader>
+        <CardContent className="space-y-3">
+          {assignments.length === 0 ? (
+            <p className="text-sm text-muted-foreground">暂无作业</p>
+          ) : (
+            assignments.map((assignment) => (
+              <div
+                key={assignment.id}
+                className="flex items-center justify-between rounded border p-3"
+              >
+                <div>
+                  <p className="font-medium">{assignment.title}</p>
+                  <p className="text-sm text-muted-foreground">
+                    题目 {assignment._count.problems} 道 · 提交{" "}
+                    {assignment._count.submissions} 次
+                  </p>
+                </div>
+                <Button asChild variant="outline">
+                  <Link
+                    href={`/dashboard/teacher/courses/${courseId}/assignments/${assignment.id}`}
+                  >
+                    查看统计
+                  </Link>
+                </Button>
+              </div>
+            ))
+          )}
+        </CardContent>
+      </Card>
+    </div>
+  );
+}

src/app/(protected)/dashboard/teacher/courses/layout.tsx

@@ -0,0 +1,9 @@
+import { ProtectedLayout } from "@/features/dashboard/layouts/protected-layout";
+
+export default async function TeacherCoursesLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  return <ProtectedLayout roles={["TEACHER", "ADMIN"]}>{children}</ProtectedLayout>;
+}

src/app/(protected)/dashboard/teacher/courses/page.tsx

@@ -0,0 +1,138 @@
+"use client";
+
+import Link from "next/link";
+import { useEffect, useState, useTransition } from "react";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Textarea } from "@/components/ui/textarea";
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
+import {
+  createCourse,
+  listTeacherCourses,
+} from "@/app/(protected)/dashboard/actions/teacher-courses";
+
+interface CourseItem {
+  id: string;
+  title: string;
+  description: string | null;
+  archived: boolean;
+  _count: {
+    enrollments: number;
+    assignments: number;
+  };
+}
+
+export default function TeacherCoursesPage() {
+  const [courses, setCourses] = useState<CourseItem[]>([]);
+  const [title, setTitle] = useState("");
+  const [description, setDescription] = useState("");
+  const [error, setError] = useState<string | null>(null);
+  const [isPending, startTransition] = useTransition();
+
+  const fetchCourses = async () => {
+    try {
+      const data = await listTeacherCourses();
+      setCourses(
+        data.map((item) => ({
+          id: item.id,
+          title: item.title,
+          description: item.description,
+          archived: item.archived,
+          _count: item._count,
+        }))
+      );
+    } catch (e) {
+      setError(e instanceof Error ? e.message : "加载课程失败");
+    }
+  };
+
+  useEffect(() => {
+    fetchCourses();
+  }, []);
+
+  const handleCreateCourse = () => {
+    setError(null);
+    startTransition(async () => {
+      try {
+        await createCourse({ title, description });
+        setTitle("");
+        setDescription("");
+        await fetchCourses();
+      } catch (e) {
+        setError(e instanceof Error ? e.message : "创建课程失败");
+      }
+    });
+  };
+
+  return (
+    <div className="space-y-6 p-6">
+      <Card>
+        <CardHeader>
+          <CardTitle>创建课程</CardTitle>
+          <CardDescription>创建课程后可添加学生并发布作业</CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-3">
+          <Input
+            value={title}
+            onChange={(e) => setTitle(e.target.value)}
+            placeholder="课程标题"
+          />
+          <Textarea
+            value={description}
+            onChange={(e) => setDescription(e.target.value)}
+            placeholder="课程简介（可选）"
+          />
+          <Button
+            onClick={handleCreateCourse}
+            disabled={isPending || !title.trim()}
+          >
+            {isPending ? "创建中..." : "创建课程"}
+          </Button>
+          {error ? <p className="text-sm text-red-500">{error}</p> : null}
+        </CardContent>
+      </Card>
+
+      <Card>
+        <CardHeader>
+          <CardTitle>我的课程</CardTitle>
+          <CardDescription>点击课程进入作业编排与学生管理</CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-3">
+          {courses.length === 0 ? (
+            <p className="text-sm text-muted-foreground">暂无课程</p>
+          ) : (
+            courses.map((course) => (
+              <div
+                key={course.id}
+                className="flex items-center justify-between rounded-md border p-3"
+              >
+                <div className="space-y-1">
+                  <p className="font-medium">{course.title}</p>
+                  <p className="text-sm text-muted-foreground">
+                    {course.description || "暂无课程简介"}
+                  </p>
+                  <p className="text-xs text-muted-foreground">
+                    学生 {course._count.enrollments} 人 · 作业{" "}
+                    {course._count.assignments} 个
+                    {course.archived ? " · 已归档" : ""}
+                  </p>
+                </div>
+                <Button asChild variant="outline">
+                  <Link href={`/dashboard/teacher/courses/${course.id}`}>
+                    进入课程
+                  </Link>
+                </Button>
+              </div>
+            ))
+          )}
+        </CardContent>
+      </Card>
+    </div>
+  );
+}

src/app/actions/judge.ts

@@ -13,7 +13,8 @@ import { createContainer, createTarStream, prepareEnvironment } from "./docker";
 export const judge = async (
   problemId: string,
   language: Language,
-  content: string
+  content: string,
+  assignmentId?: string
 ): Promise<Status> => {
   const session = await auth();
   const userId = session?.user?.id;
@@ -25,6 +26,102 @@ export const judge = async (
   let container: Docker.Container | null = null;
 
   try {
+    const actor = await prisma.user.findUnique({
+      where: { id: userId },
+      select: { id: true, role: true },
+    });
+
+    if (!actor) {
+      return Status.SE;
+    }
+
+    const createSystemErrorSubmission = async (
+      message: string,
+      options?: { assignmentId?: string | null }
+    ) => {
+      await prisma.submission.create({
+        data: {
+          language,
+          content,
+          status: Status.SE,
+          message,
+          userId,
+          problemId,
+          assignmentId: options?.assignmentId ?? null,
+        },
+      });
+    };
+
+    let validatedAssignmentId: string | undefined;
+    if (assignmentId) {
+      const assignment = await prisma.assignment.findUnique({
+        where: { id: assignmentId },
+        select: {
+          id: true,
+          published: true,
+          course: {
+            select: {
+              archived: true,
+              teacherId: true,
+              enrollments: {
+                where: { userId },
+                select: { userId: true },
+              },
+            },
+          },
+          problems: {
+            where: { problemId },
+            select: { problemId: true },
+          },
+        },
+      });
+
+      if (!assignment) {
+        await createSystemErrorSubmission("Assignment not found");
+        return Status.SE;
+      }
+
+      const isTeacherOwner = assignment.course.teacherId === userId;
+      const isStudentEnrolled = assignment.course.enrollments.length > 0;
+      const canAccessAssignment =
+        actor.role === "ADMIN" ||
+        (actor.role === "TEACHER" && isTeacherOwner) ||
+        (actor.role === "GUEST" && isStudentEnrolled);
+
+      if (!canAccessAssignment) {
+        await createSystemErrorSubmission("No permission for assignment", {
+          assignmentId: assignment.id,
+        });
+        return Status.SE;
+      }
+
+      if (assignment.course.archived) {
+        await createSystemErrorSubmission("Course is archived", {
+          assignmentId: assignment.id,
+        });
+        return Status.SE;
+      }
+
+      if (!assignment.published && actor.role === "GUEST") {
+        await createSystemErrorSubmission("Assignment is not published", {
+          assignmentId: assignment.id,
+        });
+        return Status.SE;
+      }
+
+      if (assignment.problems.length === 0) {
+        await createSystemErrorSubmission(
+          "Problem does not belong to assignment",
+          {
+            assignmentId: assignment.id,
+          }
+        );
+        return Status.SE;
+      }
+
+      validatedAssignmentId = assignment.id;
+    }
+
     const problem = await prisma.problem.findUnique({
       where: {
         id: problemId,
@@ -32,15 +129,8 @@ export const judge = async (
     });
 
     if (!problem) {
-      await prisma.submission.create({
-        data: {
-          language,
-          content,
-          status: Status.SE,
-          message: "Problem not found",
-          userId,
-          problemId,
-        },
+      await createSystemErrorSubmission("Problem not found", {
+        assignmentId: validatedAssignmentId,
       });
       return Status.SE;
     }
@@ -52,16 +142,10 @@ export const judge = async (
     });
 
     if (!testcases.length) {
-      await prisma.submission.create({
-        data: {
-          language,
-          content,
-          status: Status.SE,
-          message: "No testcases available for this problem",
-          userId,
-          problemId,
-        },
-      });
+      await createSystemErrorSubmission(
+        "No testcases available for this problem",
+        { assignmentId: validatedAssignmentId }
+      );
       return Status.SE;
     }
 
@@ -72,16 +156,10 @@ export const judge = async (
     });
 
     if (!dockerConfig) {
-      await prisma.submission.create({
-        data: {
-          language,
-          content,
-          status: Status.SE,
-          message: `Docker configuration not found for language: ${language}`,
-          userId,
-          problemId,
-        },
-      });
+      await createSystemErrorSubmission(
+        `Docker configuration not found for language: ${language}`,
+        { assignmentId: validatedAssignmentId }
+      );
       return Status.SE;
     }
 
@@ -105,6 +183,7 @@ export const judge = async (
           message: `Docker image not found: ${dockerConfig.image}:${dockerConfig.tag}`,
           userId,
           problemId,
+          assignmentId: validatedAssignmentId,
         },
       });
       return Status.SE;
@@ -117,6 +196,7 @@ export const judge = async (
         status: Status.PD,
         userId,
         problemId,
+        assignmentId: validatedAssignmentId,
       },
     });
 

src/components/dynamic-breadcrumb.tsx

@@ -45,6 +45,8 @@ export function DynamicBreadcrumb() {
         teacher: "教师平台",
         student: "学生平台",
         usermanagement: "用户管理",
+        courses: "课程",
+        assignments: "作业",
         userdashboard: "用户仪表板",
         protected: "受保护",
         app: "应用",

src/components/sidebar/app-sidebar.tsx

@@ -34,6 +34,10 @@ const data = {
           title: "开始做题",
           url: "/problemset",
         },
+        {
+          title: "我的课程",
+          url: "/dashboard/student/courses",
+        },
         {
           title: "个人设置",
           url: "/dashboard/management",

src/components/sidebar/teacher-sidebar.tsx

@@ -37,6 +37,10 @@ const data = {
           title: "完成情况",
           url: "/dashboard/teacher/dashboard",
         },
+        {
+          title: "课程管理",
+          url: "/dashboard/teacher/courses",
+        },
       ],
     },
   ],

src/features/problems/components/judge-button.tsx

@@ -6,6 +6,7 @@ import { useState } from "react";
 import { Actions } from "flexlayout-react";
 import { judge } from "@/app/actions/judge";
 import { useTranslations } from "next-intl";
+import { useSearchParams } from "next/navigation";
 import { LoaderCircleIcon, PlayIcon } from "lucide-react";
 import { TooltipButton } from "@/components/tooltip-button";
 import { useProblemEditorStore } from "@/stores/problem-editor";
@@ -19,6 +20,7 @@ interface JudgeButtonProps {
 export const JudgeButton = ({ className }: JudgeButtonProps) => {
   const { model } = useProblemFlexLayoutStore();
   const { problem, language, value } = useProblemEditorStore();
+  const searchParams = useSearchParams();
   const [isLoading, setIsLoading] = useState<boolean>(false);
   const t = useTranslations("PlaygroundHeader.RunCodeButton");
 
@@ -26,7 +28,8 @@ export const JudgeButton = ({ className }: JudgeButtonProps) => {
     if (!problem?.problemId) return;
     setIsLoading(true);
 
-    const status = await judge(problem.problemId, language, value);
+    const assignmentId = searchParams.get("assignmentId") || undefined;
+    const status = await judge(problem.problemId, language, value, assignmentId);
     toast.custom((t) => <JudgeToast t={t} status={status} />);
 
     if (model) {