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/desktop/scripts/copy-icons.ts

@@ -0,0 +1,12 @@
+import { $ } from "bun"
+import { resolveChannel } from "./utils"
+
+const arg = process.argv[2]
+const channel = arg === "dev" || arg === "beta" || arg === "prod" ? arg : resolveChannel()
+
+const src = `./icons/${channel}`
+const dest = "resources/icons"
+
+await $`rm -rf ${dest}`
+await $`cp -R ${src} ${dest}`
+console.log(`Copied ${channel} icons from ${src} to ${dest}`)