feat(scripts): add diagnostic, seed, and test scripts

- Add add-ai-provider-visibility and add-missing-columns migration scripts

- Add clear-error-book, seed-error-book, diagnose-error-book scripts

- Add diagnose-tables and create-missing-tables scripts

- Add test-failing-modules and test-teacher-pages test scripts

scripts/clear-error-book.ts

@@ -0,0 +1,15 @@
+import "dotenv/config"
+import { db } from "../src/shared/db"
+import { sql } from "drizzle-orm"
+
+async function clear() {
+  await db.execute(sql`DELETE FROM error_book_reviews`)
+  await db.execute(sql`DELETE FROM error_book_items`)
+  console.log("✓ 已清空 error_book_reviews 和 error_book_items 表")
+  process.exit(0)
+}
+
+clear().catch((e) => {
+  console.error("❌ 清空失败:", e)
+  process.exit(1)
+})