feat(P2): 实现选课管理、考试监考、学情诊断三大功能模块

## 新增功能模块

### 1. 选课管理（elective）
- 新增表：electiveCourses、courseSelections
- 新增权限：ELECTIVE_MANAGE/ELECTIVE_READ/ELECTIVE_SELECT
- 支持先到先得 + 抽签两种选课模式
- admin/teacher/student 三端页面

### 2. 考试监考（proctoring）
- exams 表扩展：examMode/durationMinutes/antiCheatEnabled 等字段
- 新增表：examProctoringEvents
- 新增权限：EXAM_PROCTOR/EXAM_PROCTOR_READ
- 教师监考面板 + 学生端防作弊监控
- API：/api/proctoring/event 接收事件上报

### 3. 学情诊断报告（diagnostic）
- 新增表：knowledgePointMastery、learningDiagnosticReports
- 新增权限：DIAGNOSTIC_MANAGE/DIAGNOSTIC_READ
- 基于提交答案自动计算知识点掌握度
- 生成个人/班级诊断报告（强项/弱项/建议）
- 雷达图可视化

## 其他改动
- 项目规则：单文件行数限制从 300 行调整为企业级规范（组件≤500/Actions≤800/硬上限1000）
- scripts/seed.ts：消除全部 any 类型，定义内部类型，0 lint 错误
- 架构文档 004/005 同步更新三个新模块
- 迁移文件 0001_heavy_sage.sql 生成

## 验证
- npx tsc --noEmit：0 错误
- npm run lint：0 错误 0 警告

scripts/seed.ts

@@ -20,6 +20,56 @@ import { sql, eq } from "drizzle-orm";
 import { hash } from "bcryptjs";
 import { ROLE_PERMISSIONS } from "../src/shared/lib/permissions";
 
+// ---- 内部类型定义（避免 any） ----
+
+interface SeedOption {
+  id: string;
+  text: string;
+  isCorrect?: boolean;
+}
+
+interface SeedQuestionContent {
+  text?: string;
+  options?: SeedOption[];
+  correctAnswer?: string | boolean;
+}
+
+interface SeedQuestion {
+  id: string;
+  type: "single_choice" | "text" | "judgment";
+  difficulty: number;
+  content: SeedQuestionContent;
+  score: number;
+}
+
+interface SeedQuestionBank {
+  chineseQuestions: SeedQuestion[];
+  mathQuestions: SeedQuestion[];
+  engQuestions?: SeedQuestion[];
+}
+
+interface SeedGradeRecord {
+  id: string;
+  studentId: string;
+  subjectId: string;
+  classId: string;
+  teacherId: string;
+  score: number;
+  examType: string;
+  term: string;
+  recordedAt: Date;
+}
+
+interface SeedAttendanceRecord {
+  id: string;
+  studentId: string;
+  classId: string;
+  date: Date;
+  status: "present" | "late" | "absent";
+  recorderId: string;
+  remark: string | null;
+}
+
 /**
  * 小学场景初始化脚本
  *
@@ -73,22 +123,22 @@ async function seed() {
   await seedEnrollmentsAndParents(classMap, studentMap, parentMap);
 
   // --- 8. 教材 + 章节（每科第一章第一节课）---
-  const chapterMap = await seedTextbooksAndChapters(subjectMap, gradeMap);
+  const chapterMap = await seedTextbooksAndChapters();
 
   // --- 9. 知识点 ---
   const kpMap = await seedKnowledgePoints(chapterMap);
 
   // --- 10. 课表 ---
-  await seedClassSchedule(classMap, subjectMap);
+  await seedClassSchedule(classMap);
 
   // --- 11. 题库 ---
   const questionBanks = await seedQuestions(teacherMap, subjectMap, kpMap);
 
   // --- 12. 试卷（语文、数学各 1 套）+ 学生答题与批改 ---
-  await seedExamsAndSubmissions(teacherMap, classMap, studentMap, subjectMap, questionBanks, gradeMap);
+  await seedExamsAndSubmissions(teacherMap, classMap, studentMap, questionBanks);
 
   // --- 13. 作业（引用试卷）+ 学生答题与批改 ---
-  await seedHomework(teacherMap, classMap, studentMap, questionBanks, subjectMap);
+  await seedHomework(teacherMap, classMap, studentMap, questionBanks);
 
   // --- 14. 成绩记录 ---
   await seedGradeRecords(teacherMap, classMap, studentMap, subjectMap, academicYearId);
@@ -451,10 +501,7 @@ async function seedEnrollmentsAndParents(
 
 // ============ 8. 教材 + 章节 ============
 
-async function seedTextbooksAndChapters(
-  subjectMap: Record<string, string>,
-  gradeMap: Record<string, string>
-) {
+async function seedTextbooksAndChapters() {
   console.log("📖 创建教材与章节...");
   // 每科 1 本教材（一年级语文、一年级数学、一年级英语）
   // 只实现第一章第一节课
@@ -558,8 +605,7 @@ async function seedKnowledgePoints(chapterMap: Record<string, string>) {
 // ============ 10. 课表 ============
 
 async function seedClassSchedule(
-  classMap: Record<string, { id: string }>,
-  subjectMap: Record<string, string>
+  classMap: Record<string, { id: string }>
 ) {
   console.log("📅 创建课表...");
   // 每班每天安排语数外，简化为周一三五各 2 节
@@ -807,13 +853,11 @@ async function seedExamsAndSubmissions(
   teacherMap: Record<string, { id: string }>,
   classMap: Record<string, { id: string }>,
   studentMap: Record<string, { id: string; classKey: string }>,
-  subjectMap: Record<string, string>,
-  questionBanks: { chineseQuestions: any[]; mathQuestions: any[] },
-  gradeMap: Record<string, string>
+  questionBanks: SeedQuestionBank
 ) {
   console.log("📝 创建试卷与学生答题...");
 
-  const makeGroup = (title: string, children: any[]) => ({
+  const makeGroup = (title: string, children: SeedQuestion[]) => ({
     id: createId(),
     type: "group" as const,
     title,
@@ -926,12 +970,12 @@ async function seedExamsAndSubmissions(
       submissionCount++;
 
       // 答案
-      const buildAnswer = (q: any, idx: number) => {
+      const buildAnswer = (q: SeedQuestion, idx: number) => {
         if (q.type === "single_choice") {
           // 前 3 题选正确项，后 2 题选错误项
-          const correct = q.content.options.find((o: any) => o.isCorrect);
-          const wrong = q.content.options.find((o: any) => !o.isCorrect);
-          return { answer: idx < 3 ? correct.id : wrong.id };
+          const correct = q.content.options?.find((o) => o.isCorrect);
+          const wrong = q.content.options?.find((o) => !o.isCorrect);
+          return { answer: idx < 3 ? correct?.id : wrong?.id };
         }
         if (q.type === "judgment") return { answer: idx < 3 };
         return { answer: idx < 3 ? "标准答案" : "学生答案" };
@@ -939,7 +983,7 @@ async function seedExamsAndSubmissions(
 
       await db.insert(submissionAnswers).values(
         exam.qIds.map((qid, idx) => {
-          const q = exam.qs.find((x: any) => x.id === qid)!;
+          const q = exam.qs.find((x) => x.id === qid)!;
           const score = isGraded ? (perScores[idx] ?? 0) : null;
           return {
             id: createId(),
@@ -963,8 +1007,7 @@ async function seedHomework(
   teacherMap: Record<string, { id: string }>,
   classMap: Record<string, { id: string }>,
   studentMap: Record<string, { id: string; classKey: string }>,
-  questionBanks: { chineseQuestions: any[]; mathQuestions: any[]; engQuestions: any[] },
-  subjectMap: Record<string, string>
+  questionBanks: SeedQuestionBank
 ) {
   console.log("📚 创建作业...");
   // 1 个语文作业（引用语文题）+ 1 个数学作业（引用数学题）
@@ -972,7 +1015,7 @@ async function seedHomework(
   const dueAt = new Date(now.getTime() + 7 * 86400_000);
   const lateDueAt = new Date(now.getTime() + 9 * 86400_000);
 
-  const assignments: { id: string; title: string; creatorId: string; qIds: string[]; qs: any[]; targetClassKey: string }[] = [
+  const assignments: { id: string; title: string; creatorId: string; qIds: string[]; qs: SeedQuestion[]; targetClassKey: string }[] = [
     {
       id: "hw_chinese_g1",
       title: "一年级语文第一课作业",
@@ -1039,7 +1082,6 @@ async function seedHomework(
     );
 
     // 前 3 个学生提交作业并批改
-    const scoreMap = new Map(hw.qs.map(q => [q.id, q.score] as const));
     for (let i = 0; i < Math.min(3, targets.length); i++) {
       const student = targets[i];
       const submissionId = createId();
@@ -1067,11 +1109,11 @@ async function seedHomework(
       });
       hwSubmissionCount++;
 
-      const buildAnswer = (q: any, idx: number) => {
+      const buildAnswer = (q: SeedQuestion, idx: number) => {
         if (q.type === "single_choice") {
-          const correct = q.content.options.find((o: any) => o.isCorrect);
-          const wrong = q.content.options.find((o: any) => !o.isCorrect);
-          return { answer: idx < 3 ? correct.id : wrong.id };
+          const correct = q.content.options?.find((o) => o.isCorrect);
+          const wrong = q.content.options?.find((o) => !o.isCorrect);
+          return { answer: idx < 3 ? correct?.id : wrong?.id };
         }
         if (q.type === "judgment") return { answer: idx < 3 };
         return { answer: idx < 3 ? "标准答案" : "学生答案" };
@@ -1079,7 +1121,7 @@ async function seedHomework(
 
       await db.insert(homeworkAnswers).values(
         hw.qIds.map((qid, idx) => {
-          const q = hw.qs.find((x: any) => x.id === qid)!;
+          const q = hw.qs.find((x) => x.id === qid)!;
           const score = isGraded ? (perScores[idx] ?? 0) : null;
           return {
             id: createId(),
@@ -1117,7 +1159,7 @@ async function seedGradeRecords(
     ENG: teacherMap.T_E1.id,
   };
 
-  const records: any[] = [];
+  const records: SeedGradeRecord[] = [];
   for (const s of g1c1Students) {
     for (const [subCode, sid] of Object.entries(subjectMap)) {
       records.push({
@@ -1151,7 +1193,7 @@ async function seedAttendanceRecords(
   // 为一年级1班最近 5 天的考勤
   const g1c1Students = Object.values(studentMap).filter(s => s.classKey === "G1C1");
   const recorder = teacherMap.T_C1.id;
-  const records: any[] = [];
+  const records: SeedAttendanceRecord[] = [];
   const statuses = ["present", "present", "present", "present", "late", "absent"] as const;
 
   for (let d = 0; d < 5; d++) {