fix: logo 右半部分从 CODING 改为 CODE

去掉难以正确渲染的 N 和 G 字母，右半部分简化为 CODE（4 字母），
与左半部分 AIR 组合为 AIR CODE。

packages/tui/test/cli/cmd/tui/model-options.test.ts

@@ -0,0 +1,30 @@
+import { describe, expect, test } from "bun:test"
+import { sortModelOptions } from "../../../../src/component/dialog-model"
+
+describe("sortModelOptions", () => {
+  test("orders provider-scoped model choices by newest release first", () => {
+    const sorted = sortModelOptions(
+      [
+        { title: "GPT 5.2", releaseDate: "2025-12-11" },
+        { title: "GPT 5.4", releaseDate: "2026-03-05" },
+        { title: "GPT 5.1", releaseDate: "2025-11-13" },
+      ],
+      true,
+    )
+
+    expect(sorted.map((model) => model.title)).toEqual(["GPT 5.4", "GPT 5.2", "GPT 5.1"])
+  })
+
+  test("preserves free-first alphabetical ordering for the regular picker", () => {
+    const sorted = sortModelOptions(
+      [
+        { title: "Beta", releaseDate: "2026-01-01" },
+        { title: "Alpha", releaseDate: "2025-01-01", footer: "Free" },
+        { title: "Gamma", releaseDate: "2024-01-01", footer: "Free" },
+      ],
+      false,
+    )
+
+    expect(sorted.map((model) => model.title)).toEqual(["Alpha", "Gamma", "Beta"])
+  })
+})