adsbdb.com alone returned "unknown" for ~80% of routes in real-world
testing. Now tries a VRS standing-data mirror first, then hexdb.io's
route endpoint, then adsbdb.com as a last fallback - same
independent-sources-with-fallback pattern already used for the
aircraft-model lookup above it.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Detail panel now shows origin/destination via adsbdb.com callsign
lookup. Rotorcraft (ADS-B category A7) get a distinct rotor-cross
marker instead of a heading arrowhead, same rationale as the existing
ground-vehicle marker. WebUI info screen gets a QR button (when WiFi
is connected) that renders the local WebUI URL as a scannable code.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
