The right-rail test now proves a .panel-floating panel is neither
measured, allocated nor auto-collapsed while its docked sibling still is.
scripts/qa-panel-resize.mjs drives the CCTV panel in a real browser:
lift-out by header drag, all eight handles with the opposite edge pinned,
minimum size, reload restore and double-click snap-back. Its pure helpers
sit behind a main guard so src/tooling/panelResizeQa.test.mjs can check
them without a browser. Run it with `npm run qa:panel-resize`.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
