perf(studio): defer optional panels and trim validator imports

e2e/ui/fixture-server.mjs

@@ -15,6 +15,7 @@ const port = Number(process.env.UI_TEST_PORT || 3107);
 if (!Number.isInteger(port) || port < 1024 || port > 65535)
 	throw Error("Invalid UI_TEST_PORT");
 const actions = new Set([
+	"@/actions/import-furni",
 	"@/actions/events",
 	"@/actions/admin-settings",
 	"@/actions/admin-table-views",
@@ -197,6 +198,7 @@ const server = createServer(async (req, res) => {
 		if (
 			[
 				"/admin/attachment-harness",
+				"/admin/studio-harness",
 				"/admin/jobs-harness",
 				"/admin/settings",
 				"/admin/articles/new",