feat(scripts): add ollama provider, grade5 chinese seed, i18n fix, and l9 deps scripts

- Add add-ai-provider-ollama for Ollama AI provider setup

- Add seed-grade5-chinese for grade 5 Chinese content seeding

- Add temp-i18n-zh-fix for Chinese i18n fixes

- Add _l9_deps module dependency analysis

scripts/add-ai-provider-ollama.js

@@ -0,0 +1,80 @@
+/**
+ * 扩展 ai_providers.provider 枚举：添加 'ollama' 用于本地 Ollama 连接
+ *
+ * 背景：
+ *   - Ollama 提供 OpenAI 兼容的 /v1/chat/completions 端点
+ *   - 无需 API Key（本地部署），无需公网
+ *   - 默认地址 http://localhost:11434/v1
+ *
+ * 变更：
+ *   - ai_providers.provider ENUM 增加 'ollama'
+ *
+ * 幂等：脚本会先读取当前枚举值，若已包含 'ollama' 则跳过。
+ */
+require("dotenv/config");
+const mysql = require("mysql2/promise");
+
+async function getCurrentEnum(conn) {
+  const [rows] = await conn.execute(
+    `SELECT COLUMN_TYPE FROM information_schema.COLUMNS
+     WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'ai_providers' AND COLUMN_NAME = 'provider'`,
+  );
+  if (rows.length === 0) return null;
+  // 形如 "enum('zhipu','openai','gemini','custom')"
+  const match = rows[0].COLUMN_TYPE.match(/enum\((.*)\)/i);
+  if (!match) return null;
+  return match[1]
+    .split(",")
+    .map((s) => s.trim().replace(/^'|'$/g, ""));
+}
+
+async function main() {
+  const conn = await mysql.createConnection({ uri: process.env.DATABASE_URL });
+  console.log("✅ 已连接数据库\n");
+
+  const current = await getCurrentEnum(conn);
+  if (!current) {
+    console.error("❌ 无法读取 ai_providers.provider 列定义，请确认表已创建");
+    await conn.end();
+    process.exit(1);
+  }
+
+  console.log(`当前枚举值: [${current.join(", ")}]`);
+
+  if (current.includes("ollama")) {
+    console.log("⏭️  枚举已包含 'ollama'，无需修改");
+    await conn.end();
+    process.exitCode = 0;
+    return;
+  }
+
+  const nextValues = [...current, "ollama"];
+  const nextEnum = nextValues.map((v) => `'${v}'`).join(",");
+  const sql = `ALTER TABLE \`ai_providers\` MODIFY COLUMN \`provider\` ENUM(${nextEnum}) NOT NULL`;
+
+  try {
+    await conn.execute(sql);
+    console.log(`✅ 执行成功: ${sql}`);
+  } catch (err) {
+    console.error(`❌ 执行失败: ${err.message}`);
+    console.error(`     SQL: ${sql}`);
+    await conn.end();
+    process.exit(1);
+  }
+
+  // 验证
+  const verify = await getCurrentEnum(conn);
+  if (verify && verify.includes("ollama")) {
+    console.log(`\n✅ 验证通过，新枚举值: [${verify.join(", ")}]`);
+  } else {
+    console.log("\n❌ 验证失败，ollama 未出现在枚举中");
+  }
+
+  await conn.end();
+  process.exitCode = 0;
+}
+
+main().catch((err) => {
+  console.error("致命错误:", err);
+  process.exit(1);
+});