feat: 新增备课模块并修复全模块 P0/P1/P2 缺陷

主要变更:

- 新增 lesson-preparation 模块: 备课编辑器、节点编辑、AI 建议、知识点选择、版本历史、作业发布

- 新增 shared 通用组件: charts/question-bank-filters/schedule-list/ui (chip-nav/filter-bar/page-header/stat-card/stat-item)

- 新增 student/admin 端 loading.tsx 与 error.tsx, 优化加载与错误态体验

- 新增 teacher/lesson-plans 页面 (列表/新建/编辑)

- 新增 drizzle 迁移 0002_tiny_lionheart 及 snapshot

- 新增 textbooks/schema.ts 与 exams/utils/normalize-structure.ts

- 修复 Tiptap v3 SSR hydration 崩溃 (rich-text-block immediatelyRender: false)

- 重构多模块 data-access/actions/组件, 修复权限校验与类型规范

- 同步架构文档 004/005 反映新增模块、导出、依赖关系

- 归档 bugs/* 测试报告与 e2e 测试脚本 (admin/parent/student/teacher web_test)

src/modules/classes/data-access.ts

@@ -50,14 +50,14 @@ export const getSessionTeacherId = async (): Promise<string | null> => {
 
 // Strict subjectId-based mapping: no aliasing
 
-export const isDuplicateInvitationCodeError = (err: unknown) => {
+export const isDuplicateInvitationCodeError = (err: unknown): boolean => {
   if (!err) return false
   const msg = err instanceof Error ? err.message : String(err)
   const m = msg.toLowerCase()
   return m.includes("duplicate") && (m.includes("invitation") || m.includes("invitation_code"))
 }
 
-const generateInvitationCode = () => {
+const generateInvitationCode = (): string => {
   const n = randomInt(0, 1_000_000)
   return String(n).padStart(6, "0")
 }
@@ -90,14 +90,15 @@ export const getClassSubjects = async (): Promise<string[]> => {
   return Array.from(new Set(names))
 }
 
-const normalizeSortText = (v: string | null | undefined) => (typeof v === "string" ? v.trim().toLowerCase() : "")
+const normalizeSortText = (v: string | null | undefined): string =>
+  typeof v === "string" ? v.trim().toLowerCase() : ""
 
-const parseFirstInt = (v: string) => {
+const parseFirstInt = (v: string): number | null => {
   const m = v.match(/\d+/)
   return m ? Number(m[0]) : null
 }
 
-const compareGradeLabel = (a: string, b: string) => {
+const compareGradeLabel = (a: string, b: string): number => {
   const aNum = parseFirstInt(a)
   const bNum = parseFirstInt(b)
   if (typeof aNum === "number" && typeof bNum === "number" && aNum !== bNum) return aNum - bNum
@@ -107,7 +108,7 @@ const compareGradeLabel = (a: string, b: string) => {
 export const compareClassLike = (
   a: { schoolName?: string | null; grade: string; name: string; homeroom?: string | null; room?: string | null },
   b: { schoolName?: string | null; grade: string; name: string; homeroom?: string | null; room?: string | null }
-) => {
+): number => {
   const schoolCmp = normalizeSortText(a.schoolName).localeCompare(normalizeSortText(b.schoolName))
   if (schoolCmp !== 0) return schoolCmp
 
@@ -228,6 +229,32 @@ export const getTeacherSubjectIdsByClass = async (classId: string, teacherId: st
   return getTeacherSubjectIdsForClass(teacherId, classId)
 }
 
+/**
+ * 获取多个班级的所有教师 ID（班主任 + 任课教师）。
+ * 供跨模块调用使用，避免直接查询 classes / classSubjectTeachers 表。
+ */
+export const getTeacherIdsByClassIds = async (classIds: string[]): Promise<string[]> => {
+  if (classIds.length === 0) return []
+  const [homeroomRows, subjectRows] = await Promise.all([
+    db
+      .select({ teacherId: classes.teacherId })
+      .from(classes)
+      .where(inArray(classes.id, classIds)),
+    db
+      .select({ teacherId: classSubjectTeachers.teacherId })
+      .from(classSubjectTeachers)
+      .where(inArray(classSubjectTeachers.classId, classIds)),
+  ])
+  const set = new Set<string>()
+  for (const r of homeroomRows) {
+    if (r.teacherId) set.add(r.teacherId)
+  }
+  for (const r of subjectRows) {
+    if (r.teacherId) set.add(r.teacherId)
+  }
+  return Array.from(set)
+}
+
 /**
  * 获取学生当前活跃班级的 ID。
  * 供跨模块调用使用，避免直接查询 classEnrollments 表。
@@ -242,6 +269,23 @@ export const getStudentActiveClassId = async (studentId: string): Promise<string
   return row?.classId ?? null
 }
 
+/**
+ * 获取学生当前活跃班级的 ID 与名称（一次 JOIN 查询）。
+ * 供跨模块调用使用，避免分别查询 classEnrollments 与 classes 表。
+ */
+export const getStudentActiveClass = async (
+  studentId: string,
+): Promise<{ classId: string; className: string } | null> => {
+  const [row] = await db
+    .select({ classId: classes.id, className: classes.name })
+    .from(classEnrollments)
+    .innerJoin(classes, eq(classes.id, classEnrollments.classId))
+    .where(and(eq(classEnrollments.studentId, studentId), eq(classEnrollments.status, "active")))
+    .orderBy(asc(classEnrollments.createdAt))
+    .limit(1)
+  return row ?? null
+}
+
 /**
  * 获取学生当前活跃班级对应的年级 ID。
  * 供跨模块调用使用，避免直接查询 classEnrollments/classes 表。
@@ -368,7 +412,8 @@ export const getTeacherClasses = cache(async (params?: { teacherId?: string }):
         .where(inArray(classes.id, allIds))
         .groupBy(classes.id, classes.schoolName, classes.name, classes.grade, classes.homeroom, classes.room, classes.invitationCode)
         .orderBy(asc(classes.schoolName), asc(classes.grade), asc(classes.name), asc(classes.homeroom), asc(classes.room))
-    } catch {
+    } catch (error) {
+      console.error("getTeacherClasses query failed:", error)
       return []
     }
   })()
@@ -672,7 +717,9 @@ export async function enrollTeacherByInvitationCode(
 
     const preferred = DEFAULT_CLASS_SUBJECTS.find((s) => subjectRows.some((r) => r.name === s))
     if (!preferred) throw new Error("Class already has assigned teachers")
-    const sid = subjectRows.find((r) => r.name === preferred)!.id
+    const subjectRow = subjectRows.find((r) => r.name === preferred)
+    if (!subjectRow) throw new Error("Subject not found")
+    const sid = subjectRow.id
 
     await db
       .update(classSubjectTeachers)