milestone 29: activity — history, live and policy simulation on one surface

query log, live and lookup merge into /activity. history filters live
in the url, so a pasted link or back/forward reproduces the exact
view; the result column separates servfail and nxdomain from success
in the list. live is follow-by-default with freeze, and a streamed
row opens its in-memory provenance detail — no correlation invented
for rows sqlite has not written. lookup survives as the current
policy simulation under /activity/test. investigation links carry
absolute bounds, and the diagnostics page now honors since/until
instead of ignoring them. the old routes are gone without aliases.

admin/src/ui/Select.tsx

@@ -32,6 +32,8 @@ interface Props {
 	 * dialog uses, `inline` a control sitting in a row of other controls.
 	 */
 	variant?: "field" | "compactField" | "inline";
+	/** Visible but inert, keeping its value on screen; RAC also drops it from the tab order. */
+	isDisabled?: boolean;
 }
 
 const styles = stylex.create({
@@ -50,7 +52,10 @@ const styles = stylex.create({
 		justifyContent: "space-between",
 		gap: "0.5rem",
 		textAlign: "left",
-		cursor: "pointer",
+		// RAC renders a real `<button disabled>`, so the state is reachable as a
+		// pseudo-class rather than needing a second style object.
+		cursor: { default: "pointer", ":disabled": "not-allowed" },
+		opacity: { default: null, ":disabled": 0.55 },
 	},
 	compact: {
 		marginTop: "0.25rem",
@@ -105,12 +110,21 @@ const styles = stylex.create({
 	},
 });
 
-export default function Select({ options, value, onChange, label, "aria-label": ariaLabel, variant = "field" }: Props) {
+export default function Select({
+	options,
+	value,
+	onChange,
+	label,
+	"aria-label": ariaLabel,
+	variant = "field",
+	isDisabled = false,
+}: Props) {
 	const base = variant === "field" ? shared.input : shared.smallInput;
 	const block = variant === "compactField" ? styles.compact : null;
 	return (
 		<AriaSelect
 			aria-label={ariaLabel}
+			isDisabled={isDisabled}
 			value={value}
 			onChange={(key) => onChange(String(key ?? ""))}
 			{...stylex.props(styles.root)}