Feature: Add local OpenAI-compatible model discovery to /model (#201)

* Add local OpenAI-compatible model discovery to /model

* Guard local OpenAI model discovery from Codex routing

* Preserve remote OpenAI Codex alias behavior

src/commands/model/model.test.tsx

@@ -0,0 +1,43 @@
+import { afterEach, expect, mock, test } from 'bun:test'
+
+const originalEnv = {
+  CLAUDE_CODE_USE_OPENAI: process.env.CLAUDE_CODE_USE_OPENAI,
+  OPENAI_BASE_URL: process.env.OPENAI_BASE_URL,
+  OPENAI_MODEL: process.env.OPENAI_MODEL,
+}
+
+afterEach(() => {
+  mock.restore()
+  process.env.CLAUDE_CODE_USE_OPENAI = originalEnv.CLAUDE_CODE_USE_OPENAI
+  process.env.OPENAI_BASE_URL = originalEnv.OPENAI_BASE_URL
+  process.env.OPENAI_MODEL = originalEnv.OPENAI_MODEL
+})
+
+test('opens the model picker without awaiting local model discovery refresh', async () => {
+  process.env.CLAUDE_CODE_USE_OPENAI = '1'
+  process.env.OPENAI_BASE_URL = 'http://127.0.0.1:8080/v1'
+  process.env.OPENAI_MODEL = 'qwen2.5-coder-7b-instruct'
+
+  let resolveDiscovery: (() => void) | undefined
+  const discoverOpenAICompatibleModelOptions = mock(
+    () =>
+      new Promise<void>(resolve => {
+        resolveDiscovery = resolve
+      }),
+  )
+
+  mock.module('../../utils/model/openaiModelDiscovery.js', () => ({
+    discoverOpenAICompatibleModelOptions,
+  }))
+
+  const { call } = await import('./model.js')
+  const result = await Promise.race([
+    call(() => {}, {} as never, ''),
+    new Promise(resolve => setTimeout(() => resolve('timeout'), 50)),
+  ])
+
+  resolveDiscovery?.()
+
+  expect(result).not.toBe('timeout')
+  expect(discoverOpenAICompatibleModelOptions).toHaveBeenCalledTimes(1)
+})