Draw a venue map

Steps

1. 1 Administrator Open the layout editor for the house venue 0:02 ▣
2. 2 Administrator Clear the seeded layout to start fresh 0:03
3. 3 Administrator Start on a blank grid 0:04 ▣

   Before plan 72 this produced an empty box: the grid's stroke was var(--border) in a presentation attribute, which browsers drop.

4. 4 Administrator Click four corners 0:07 ▣

   A dashed outline follows each click — that feedback is the whole difference between drawing and guessing.

5. 5 Administrator Double-click to close and save 0:08 ▣
6. 6 Administrator The public map carries the same labelled zones 0:09 ▣

   Labels were invisible on every map surface, not only the editor — the fix lands everywhere the SVG macro renders.