Root `npm run validate` previously delegated only to `clients/web`
(`format:check` + `lint` + `build` + `test:coverage`), so a contributor
running it before pushing could miss CLI/TUI/launcher breakage that CI
would later catch. There was no single local command mirroring CI.
Extend root `validate` to mirror the CI job end to end:
- `validate:web` — web format:check + lint + build + test:coverage
- `test:cli` / `test:tui` — CLI and TUI suites
- `validate:launcher` — build CLI + TUI + launcher, then the launcher
`--help` smoke (`smoke:launcher`: --help, --cli --help, --tui --help)
The new sub-scripts can be run individually when iterating on one
client. Storybook stays out of `validate` (Playwright-dependent, slow),
consistent with the existing convention. Documented in AGENTS.md.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>