fix: 修正 logo 中 N 和 G 字母造型

N 添加对角线笔画（█▄ █），G 添加内横杠（█ ▀█），
避免与 O 字母造型雷同。同步更新 ui.ts 中的硬编码 wordmark。

packages/console/core/script/create-coupon.ts

@@ -0,0 +1,24 @@
+import { Database } from "../src/drizzle/index.js"
+import { CouponTable, CouponType } from "../src/schema/billing.sql.js"
+
+const email = process.argv[2]
+const type = process.argv[3] as (typeof CouponType)[number]
+
+if (!email || !type) {
+  console.error(`Usage: bun create-coupon.ts <email> <${CouponType.join("|")}>`)
+  process.exit(1)
+}
+
+if (!(CouponType as readonly string[]).includes(type)) {
+  console.error(`Error: type must be one of ${CouponType.join(", ")}`)
+  process.exit(1)
+}
+
+await Database.use((tx) =>
+  tx.insert(CouponTable).values({
+    email,
+    type,
+  }),
+)
+
+console.log(`Created ${type} coupon for ${email}`)