fix: align CI node version to .nvmrc (22), remove redundant gotcha

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 22
           cache: 'npm'
 
       - name: Install dependencies

CLAUDE.md

@@ -92,7 +92,6 @@ journalctl --user -u codeman-web -f
 
 ## Common Gotchas
 
-- **`npm run dev` starts the web server** — equivalent to `npx tsx src/index.ts web`
 - **Single-line prompts only** — `writeViaMux()` sends text and Enter separately; multi-line breaks Ink
 - **Don't kill tmux sessions blindly** — Check `$CODEMAN_TMUX` first; you might be inside one
 - **Never run full test suite** — `npx vitest run` spawns/kills tmux sessions and will crash your Codeman session. Run individual test files only.