v0.3.0-beta.21

Full self-hosted public demo

• Makes https://guandan.mereith.com the sole public Demo URL.
• Opens the four-player live lobby directly to anonymous guests.
• Preserves the always-available complete local AI match.
• Improves mobile online-hand scrolling and keeps touch actions reachable above bottom navigation.
• Confirms compatible-model Agent and ElevenLabs modes with local fallbacks.

Verification

• Production four-guest matchmaking, private hand projections, legal action and cancellation passed
• Production compatible Agent returned a locally validated move
• Production ElevenLabs returned valid MP3 audio
• 176 unit tests passed
• 36 end-to-end tests passed, 10 skipped
• lint, typecheck, build, CodeQL, dependency review and secret scanning passed