The quit hook only history.back()ed on a SAME-ORIGIN referrer, so the
primary closed-deploy entry — app.pcbjam.com deep-linking into
editor.pcbjam.com (cross-origin) — fell through to the editor's own
project view instead of returning to the app. Quit is Back-button
semantics (3a2255c): any non-empty referrer with in-tab history now
goes back; deep links / fresh tabs (no referrer) keep the project-page
fallback. Verified live against the closed stack: :3047 → editor →
quit lands back on :3047; a direct editor URL still falls back to the
editor's project overview.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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