More Local Multiplayer and Bluetooth controller issues.

- #210 — Fixed stale auth token score submission
- #211 — Single-instance Electron lock
- #212 — Victory video animation loop leak fix
- #213 — Gyro recenter between games (P1 + P2)
- #215 — AppUserModelId for Windows taskbar grouping
- #217 — Platform-aware button cooldowns
- #218 — Local MP join UX + WebHID P2 detection
- #220 — WebHID fallback for blind Gamepad API
- #221 — GPU crash issue filed
- #222 — Controller architecture issue filed for future work