milestone 32: task-shaped configuration, file mode as a rendering, config status api

admin/src/features/configuration/QueryPanel.tsx

@@ -0,0 +1,30 @@
+import type { ReactNode } from "react";
+import type { UseQueryResult } from "@tanstack/react-query";
+import * as stylex from "@stylexjs/stylex";
+import InlineError from "@/lib/InlineError";
+import { styles as shared } from "@/ui/styles";
+import { styles } from "./styles";
+
+/**
+ * One panel's data, with the loading and error surfaces the fire-and-forget
+ * route loaders leave to the page. A configuration page holds several
+ * independent collections; each states its own condition instead of the whole
+ * page waiting on the slowest request.
+ */
+export default function QueryPanel<T>({
+	query,
+	children,
+}: {
+	query: UseQueryResult<T, Error>;
+	children: (data: T) => ReactNode;
+}) {
+	if (query.isPending) {
+		return (
+			<p role="status" {...stylex.props(styles.pending, shared.pulse)}>
+				Loading…
+			</p>
+		);
+	}
+	if (query.isError) return <InlineError error={query.error} onRetry={() => void query.refetch()} />;
+	return <>{children(query.data)}</>;
+}