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/cli/tui/thread.test.ts

@@ -0,0 +1,36 @@
+import { describe, expect, test } from "bun:test"
+import fs from "fs/promises"
+import path from "path"
+import { tmpdir } from "../../fixture/fixture"
+import { resolveThreadDirectory } from "../../../src/cli/cmd/tui"
+
+describe("tui thread", () => {
+  test("loads the TUI integration lazily", async () => {
+    const source = await Bun.file(new URL("../../../src/cli/cmd/tui.ts", import.meta.url)).text()
+
+    expect(source).toContain('await import("../tui/layer")')
+    expect(source).toMatch(/await import\(["']@\/plugin\/tui\/runtime["']\)/)
+    expect(source).not.toContain('import("./app")')
+  })
+
+  async function check(project?: string) {
+    await using tmp = await tmpdir({ git: true })
+    const link = path.join(path.dirname(tmp.path), path.basename(tmp.path) + "-link")
+    const type = process.platform === "win32" ? "junction" : "dir"
+
+    try {
+      await fs.symlink(tmp.path, link, type)
+      expect(resolveThreadDirectory(project, link, tmp.path)).toBe(tmp.path)
+    } finally {
+      await fs.rm(link, { recursive: true, force: true }).catch(() => undefined)
+    }
+  }
+
+  test("uses the real cwd when PWD points at a symlink", async () => {
+    await check()
+  })
+
+  test("uses the real cwd after resolving a relative project from PWD", async () => {
+    await check(".")
+  })
+})