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-file.test.ts

@@ -0,0 +1,73 @@
+import { afterEach, describe, expect, test } from "bun:test"
+import { Context } from "effect"
+import path from "path"
+import { HttpApiApp } from "../../src/server/routes/instance/httpapi/server"
+import { FilePaths } from "../../src/server/routes/instance/httpapi/groups/file"
+import { resetDatabase } from "../fixture/db"
+import { disposeAllInstances, tmpdir } from "../fixture/fixture"
+
+const context = Context.empty() as Context.Context<unknown>
+
+function request(route: string, directory: string, query?: Record<string, string>) {
+  const url = new URL(`http://localhost${route}`)
+  for (const [key, value] of Object.entries(query ?? {})) {
+    url.searchParams.set(key, value)
+  }
+  return HttpApiApp.webHandler().handler(
+    new Request(url, {
+      headers: {
+        "x-opencode-directory": directory,
+      },
+    }),
+    context,
+  )
+}
+
+afterEach(async () => {
+  await disposeAllInstances()
+  await resetDatabase()
+})
+
+describe("file HttpApi", () => {
+  test("serves read endpoints", async () => {
+    await using tmp = await tmpdir({ git: true })
+    await Bun.write(path.join(tmp.path, "hello.txt"), "hello")
+
+    const [list, content, status] = await Promise.all([
+      request(FilePaths.list, tmp.path, { path: "." }),
+      request(FilePaths.content, tmp.path, { path: "hello.txt" }),
+      request(FilePaths.status, tmp.path),
+    ])
+
+    expect(list.status).toBe(200)
+    expect(await list.json()).toContainEqual(
+      expect.objectContaining({ name: "hello.txt", path: "hello.txt", type: "file" }),
+    )
+
+    expect(content.status).toBe(200)
+    expect(await content.json()).toMatchObject({ type: "text", content: "hello" })
+
+    expect(status.status).toBe(200)
+    expect(await status.json()).toEqual([])
+  })
+
+  test("serves search endpoints", async () => {
+    await using tmp = await tmpdir({ git: true })
+    await Bun.write(path.join(tmp.path, "hello.txt"), "needle")
+
+    const [text, files, symbols] = await Promise.all([
+      request(FilePaths.findText, tmp.path, { pattern: "needle" }),
+      request(FilePaths.findFile, tmp.path, { query: "hello", type: "file" }),
+      request(FilePaths.findSymbol, tmp.path, { query: "hello" }),
+    ])
+
+    expect(text.status).toBe(200)
+    expect(await text.json()).toContainEqual(expect.objectContaining({ line_number: 1 }))
+
+    expect(files.status).toBe(200)
+    expect(await files.json()).toContain("hello.txt")
+
+    expect(symbols.status).toBe(200)
+    expect(await symbols.json()).toEqual([])
+  })
+})