Fix the drawing in the editor

The page draws your level area; roadstyle's level editor changes it, with your lanes on the roads.

Which road is drawn over which, and how each road ends (its heads, round, square or flat caps), comes from the level area (duckosm levels makes monaco.levels/). Fix a place in the editor, and the page you build next draws it the same way, because both use the same drawing:

LANESTYLE_GMNS=monaco_gmns.duckdb LANESTYLE_SOURCE_DB=monaco.duckdb \
    roadstyle-levels edit monaco.levels --items lanestyle.editor:lane_items

Open http://localhost:8780/?at=7.4218,43.7350,18 to start at a place (longitude, latitude, zoom).

• Click two roads to see the rules between them and add one: a road over another (an order), one of its ends over it (a stack), or two roads that meet.
• A rule you add that the solver cannot keep says why: the rules it makes a loop with. Switch one of them off.
• Apply redraws the changed roads and their lanes in place.

Your edits are kept in monaco.levels/edits.csv, heads.csv and caps.csv; duckosm levels keeps them when it makes the area again.