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/app/test/rateLimiter.test.ts

@@ -0,0 +1,19 @@
+import { describe, expect, test } from "bun:test"
+import { getRetryAfterDay } from "../src/routes/zen/util/ipRateLimiter"
+
+describe("getRetryAfterDay", () => {
+  test("returns full day at midnight UTC", () => {
+    const midnight = Date.UTC(2026, 0, 15, 0, 0, 0, 0)
+    expect(getRetryAfterDay(midnight)).toBe(86_400)
+  })
+
+  test("returns remaining seconds until next UTC day", () => {
+    const noon = Date.UTC(2026, 0, 15, 12, 0, 0, 0)
+    expect(getRetryAfterDay(noon)).toBe(43_200)
+  })
+
+  test("rounds up to nearest second", () => {
+    const almost = Date.UTC(2026, 0, 15, 23, 59, 59, 500)
+    expect(getRetryAfterDay(almost)).toBe(1)
+  })
+})