ci(setup): add local setup smoke workflow

[RSO]

Summary

• Add a standalone setup-smoke workflow that exercises the documented clean-checkout local setup path on PRs and manual dispatch.
• Add non-interactive dev:setup-env --ci placeholder env generation plus dev:start --no-attach for headless CI startup.
• Add a dedicated Playwright setup-smoke test that signs in through fake auth and verifies the profile page against the running dev stack.

Verification

N/A - this PR introduces a CI setup smoke workflow; the workflow itself performs the browser validation.

Visual Changes

N/A

Reviewer Notes

The workflow currently runs on PRs for validation and can be switched to scheduled-only once it proves stable.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

Incremental review of the latest commit (fix(ci): assert visible setup smoke profile content) finds no new issues. The single change replaces the stale heading[Profile] assertion with two more-specific checks — link[Your Profile] and button[Edit profile] — that match the actual rendered profile page. The previously flagged WARNING on profile.spec.ts:46 is in unchanged code and is carried forward.

Files Reviewed (1 file changed, 10 files carried forward)

• apps/web/tests/setup-smoke/profile.spec.ts — 1 carried-forward WARNING (existing inline comment on line 46)
• .github/workflows/setup-smoke.yml — no issues (carried forward)
• apps/web/package.json — no issues (carried forward)
• apps/web/playwright.setup-smoke.config.ts — no issues (carried forward)
• apps/web/src/lib/stripe-client.ts — no issues (carried forward)
• dev/local/cli.ts — no issues (carried forward)
• dev/local/runner.ts — no issues (carried forward)
• dev/local/setup-env.ts — no issues (carried forward)
• dev/local/tmux.ts — no issues (carried forward)
• package.json — no issues (carried forward)

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_{Reviewed by claude-4.6-sonnet-20260217 · 267,079 tokens}

_{Review guidance: REVIEW.md from base branch main}