v0.7.0

AI route drafting and a routing workflow overhaul.

Highlights:

• AI route drafting and optimize (beta). Describe a passage in plain language and review a drafted
  route, or optimize a route you drew, when signalk-crows-nest provides the route-draft endpoint.
  Drafts open as an editable working route with a not-chart-verified banner and per-leg land, shallow,
  hazard, and fuel flags, and save only behind an armed "I checked every leg" confirm. It is a beta
  assistant and cannot guarantee accuracy: review every leg against the official charts and your
  instruments before you navigate it. It stays hidden on a server without the endpoint.
• Route editing on the chart. Waypoints show as dots the moment you draft, optimize, or edit a
  route. Tap a leg to light its segment and end dots, tap a dot to light the legs it joins, drag a dot
  to move it, tap a midpoint to insert one, and start a route from the chart menu.
• AIS course vectors. Moving AIS targets draw a short course predictor, red for a danger contact
  and amber for a warning.
• Polish and reliability. A corner-anchored main menu, offline and runtime caching that works
  again in a secure context, antimeridian-crossing routes that frame the short way, fewer false
  collision alerts at anchor, and a cross-slice internal consolidation with no behavior change.

See the changelog for
the full list.