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/diagnostic/data-access-reports.ts

@@ -1,7 +1,7 @@
 import "server-only"
 
 import { createId } from "@paralleldrive/cuid2"
-import { and, desc, eq, inArray } from "drizzle-orm"
+import { and, desc, eq, inArray, type SQL } from "drizzle-orm"
 import { cache } from "react"
 
 import { db } from "@/shared/db"
@@ -19,8 +19,6 @@ const toNumber = (v: unknown): number => {
   return Number.isFinite(n) ? n : 0
 }
 
-const round2 = (n: number): number => Math.round(n * 100) / 100
-
 const isStringArray = (v: unknown): v is string[] =>
   Array.isArray(v) && v.every((item) => typeof item === "string")
 
@@ -127,7 +125,7 @@ export async function generateClassDiagnosticReport(
 /** 查询诊断报告列表 */
 export const getDiagnosticReports = cache(
   async (filters: DiagnosticReportQueryParams): Promise<DiagnosticReportWithDetails[]> => {
-    const conditions = []
+    const conditions: SQL[] = []
     if (filters.studentId) conditions.push(eq(learningDiagnosticReports.studentId, filters.studentId))
     if (filters.reportType) conditions.push(eq(learningDiagnosticReports.reportType, filters.reportType))
     if (filters.status) conditions.push(eq(learningDiagnosticReports.status, filters.status))
@@ -203,6 +201,3 @@ export async function publishDiagnosticReport(id: string): Promise<void> {
 export async function deleteDiagnosticReport(id: string): Promise<void> {
   await db.delete(learningDiagnosticReports).where(eq(learningDiagnosticReports.id, id))
 }
-
-// 防止 round2 未使用警告（保留以备扩展）
-void round2