FX.32 ModelCraft: the Render view pop-up stays over the toolbar, and the Render panel shows "null" under Detail

Reported 2026-10-25 on macOS Studio: switching to Render shows a "The path tracer renders the view..." pop-up that does not go away and passes clicks to the toolbar underneath; the Render in the view panel has the word null below the Detail drop-down. Untested; not yet looked for in the code.

Checked 2026-11-05 (model-fix-09): already fixed in 0.7.1 (71.1: the long note became a plain paragraph in the Render panel instead of the floating stage hint; 71.2: the empty slot that printed "null" is gone), and the code is the same in 0.8.1. The reporter was on 0.7. Reproduced in /lab with a browser test (tools/modelcraft-test/browser-fix09.mjs, 'FX.32'): the note sits inside the side panel, does not cover the toolbar, a click on it lands on it, it has a Close control (and "What is this?" brings it back), and the word null is nowhere in the panel. Not tested on macOS Studio itself.