QA follow-ups on the ADS-B/AIS overlays: - Legend gains an aircraft altitude key (tar1090 ramp) while the Aircraft overlay is on (closes #185). - AIS aids to navigation (MMSI 99xxxxxxx) render as small yellow buoy diamonds labelled 'Aid to navigation', no speed; vessels get a 22px outlined hull, and heading 511/360 ('not available') no longer rotates the icon (closes #186). - Aircraft details panel becomes a bottom sheet above the incident drawer below md, instead of fighting the layers control at the top right. Verified: tsc --noEmit clean (node:20 on radio-box). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>