英语语法模块 v2:接入参考语法体系,中文为主,家长可编辑,全部可学

- 内容底座改为你提供的语法体系(入门/基础/进阶 69 知识点,中文讲解 +
  中英对照例句 + 六步教学法),整体更适合小学生
- 内容存库(grammar_point),家长中心新增"编辑英语课程"可改标题/目标/
  课文,保存即时生效
- 取消顺序解锁,所有课程可直接学习,通过测验即点亮
- 测验引擎支持 选择/判断/填空/连词成句/连线 五种题型,达标自动联动
  当日英语打卡

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

scripts/seed-grammar.ts

@@ -0,0 +1,55 @@
+// 将参考语法体系(ref-data.json)灌入 grammar_point 表;仅当表为空时执行
+import fs from "node:fs";
+import path from "node:path";
+import { sql } from "drizzle-orm";
+import { drizzle } from "drizzle-orm/mysql2";
+import mysql from "mysql2/promise";
+import { grammarPoints } from "../src/db/schema";
+
+type RefPoint = {
+  id: string;
+  title: string;
+  difficulty: number;
+  prereq: string[];
+  summary: string;
+  md: string;
+};
+type RefLevel = { id: string; name: string; points: RefPoint[] };
+
+async function main() {
+  const file = path.join(process.cwd(), "src/content/grammar/ref-data.json");
+  const data = JSON.parse(fs.readFileSync(file, "utf8")) as { levels: RefLevel[] };
+  const conn = await mysql.createConnection(process.env.DATABASE_URL!);
+  const db = drizzle(conn);
+
+  const [cnt] = await db.select({ n: sql<number>`COUNT(*)` }).from(grammarPoints);
+  if (cnt.n > 0) {
+    console.log("grammar_point 已有", cnt.n, "条,跳过种子");
+    await conn.end();
+    return;
+  }
+
+  let seq = 0;
+  const rows = [];
+  for (const lvl of data.levels) {
+    for (const p of lvl.points) {
+      seq += 1;
+      rows.push({
+        pointId: p.id,
+        level: lvl.id,
+        levelName: lvl.name,
+        title: p.title,
+        difficulty: p.difficulty,
+        summary: p.summary,
+        prereq: JSON.stringify(p.prereq ?? []),
+        md: p.md,
+        seq,
+      });
+    }
+  }
+  await db.insert(grammarPoints).values(rows);
+  console.log("已写入 grammar_point:", rows.length, "条");
+  await conn.end();
+}
+
+main();