play_canvas.spec.js covers the window.__FERROUS_DEBUG__ bridge on the
/play route (five tests): bridge availability + seed param, draw3 URL
param, applyLegalMove/undo round-trip, failureReport schema, and
autonomous autoplay invariant batch across 7 seeds.
All tests drive exclusively through the debug bridge — no DOM selectors,
because the Bevy canvas is a single <canvas> element with no HTML
controls.
Also update SESSION_HANDOFF.md to reflect post-v0.35.1 work (10 commits
since 2026-05-18 handoff), new e2e architecture notes, and HiDPI fix doc.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
funman300