Bump to 0.6.3 and document the screen-share work merged on this branch: the advanced Settings section + per-call quality picker (96e41de), the hardware-decode-defaults-off frame-1 freeze fix (96e41de), the per-call quality override fix (e378b2e), and the VLC-honors-viewer-settings fix (faad8ce). All local-only — no wire-protocol change, old configs load unchanged. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>