feat(engine): answer texts with Codex as well as Claude Code

Review threads live on the whole diff, not on one commit, so none are shown here - a thread's line means something in the branch's final form, and painting it into an intermediate step would put it on code it is not about.

app/Commands/Uplink.tsmodifiedformatting only+1-1

Changes to app/Commands/Uplink.ts

		@@ -1,7 +1,7 @@
	1	+import type { EngineId } from '../Uplink/engine'
1	2	import { copyFileSync, existsSync, watch } from 'node:fs'
2	3	import process from 'node:process'
3	4	import { defineCommand } from '@stacksjs/cli'
4		-import type { EngineId } from '../Uplink/engine'
5	5	import { loadConfig } from '../Uplink/config'
6	6	import { checksPass, runChecks, writeHeartbeat } from '../Uplink/doctor'
7	7	import { ENGINE_IDS, isEngineId } from '../Uplink/engine'

app/Uplink/engines.tsmodified+1-2

Changes to app/Uplink/engines.ts

		⋯1 lineShow the 1 line above this hunk@@ -2,8 +2,7 @@ import type { UplinkConfig } from './config'
2	2	import type { Engine, EngineId } from './engine'
3	3	import { CodexEngine } from './codex-engine'
4	4	import { systemPrompt } from './config'
5		-import { ClaudeEngine } from './engine'
6		-import { ENGINE_IDS } from './engine'
	5	+import { ClaudeEngine, ENGINE_IDS } from './engine'
7	6
8	7	/**
9	8	* Builds engines from config, so the watcher, the app and the doctor all select