The ground-polyline worker loads approximateTerrainHeights.json itself,
and a worker's requests go to the panel page's own site, where they
failed with 404 and stopped rendering once ground-clamped lines such as
military installations appeared. The panel build now embeds that file in
the workers script, which answers the worker's request from memory.
Hosts serve panels from their own sites and may refuse other addresses;
Codex refuses any address on the user's machine. The panel now never
requests the app's server: it loads the app's panel build and data
through panel_request, a tool only the panel may call, which requests
the path from the app's server. One path in every host; only map
providers load directly.
npm run build:panel writes the panel build to dist/panel, served at
/panel/: one app script, one stylesheet, Cesium's script, and Cesium's
workers as one script Cesium runs from memory. Tools may now be marked
app-only. The panel CORS rules are gone.
Sameh Khamis