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/opencode/test/server/httpapi-layer.ts

@@ -0,0 +1,33 @@
+import { NodeHttpServer, NodeServices } from "@effect/platform-node"
+import { Config, Layer } from "effect"
+import { HttpClient, HttpClientRequest, HttpRouter, HttpServer } from "effect/unstable/http"
+import { layerWebSocketConstructorGlobal } from "effect/unstable/socket/Socket"
+import { HttpApiApp } from "../../src/server/routes/instance/httpapi/server"
+
+const servedRoutes: Layer.Layer<never, Config.ConfigError, HttpServer.HttpServer> = HttpRouter.serve(
+  HttpApiApp.routes,
+  {
+    disableListenLog: true,
+    disableLogger: true,
+  },
+)
+
+export const httpApiLayer = servedRoutes.pipe(
+  Layer.provide(layerWebSocketConstructorGlobal),
+  Layer.provideMerge(NodeHttpServer.layerTest),
+  Layer.provideMerge(NodeServices.layer),
+)
+
+export function request(path: string, init?: RequestInit) {
+  const url = new URL(path, "http://localhost")
+  return HttpClientRequest.fromWeb(new Request(url, init)).pipe(
+    HttpClientRequest.setUrl(url.pathname),
+    HttpClient.execute,
+  )
+}
+
+export function requestInDirectory(path: string, directory: string, init: RequestInit = {}) {
+  const headers = new Headers(init.headers)
+  headers.set("x-opencode-directory", directory)
+  return request(path, { ...init, headers })
+}