Share the K1 live scene template and preserve idle media channels

apps/control-station/test/rerunViewportAtomicAdmission.test.mjs

@@ -382,7 +382,7 @@ test("the spatial header reports raw replay as an active source", async () => {
 });
 
 test("the complete vendor canvas host is hidden during partial and failed admission", async () => {
-  const css = await readFile(new URL("../src/styles/spatial.css", import.meta.url), "utf8");
+  const css = await readFile(new URL("../../../packages/spatial-ui/src/spatial.css", import.meta.url), "utf8");
   assert.match(
     css,
     /\.rerun-viewport:is\(\[data-status="loading"\], \[data-status="error"\]\)\s+\.rerun-viewport__canvas\s*\{[^}]*visibility:\s*hidden;[^}]*pointer-events:\s*none;/s,