fix: honor automatic updates preference and add Settings controls

tests/render-update-banner.test.tsx

@@ -1,7 +1,7 @@
 /**
  * Update-banner render tests (Wave C, 2026-10-10): the banner is a pure
- * function of the last lh:update-status push — hidden without one (the
- * browser/dev world: no window.lh at all), visible with the downloaded
+ * function of the shell's observational status — hidden without a bridge
+ * or snapshot/event, visible with the downloaded
  * status, Restart wired to the bridge. The subscribe effect only runs
  * client-side, so the SSR pass pins the hidden state; the pushed state is
  * exercised by mounting with the bridge stubbed (classic-JSX shim as in
@@ -17,6 +17,7 @@ import * as ReactDOMClient from "react-dom/client";
 import { flushSync } from "react-dom";
 import { parseHTML } from "linkedom";
 import UpdateBanner from "../components/update-banner.tsx";
+import type { UpdateState } from "../components/settings/update-settings.tsx";
 
 // linkedom as the DOM for the interactive pass (first createRoot test in
 // the repo — the banner's push→render→click flow needs real effects).
@@ -36,9 +37,9 @@ describe("update banner (Wave C)", () => {
 	});
 
 	it("renders nothing when the bridge exists but no status has arrived", () => {
-		const listeners: Array<(s: { status: string; version: string | null }) => void> = [];
+		const listeners: Array<(s: UpdateState) => void> = [];
 		(window as { lh?: unknown }).lh = {
-			onUpdateStatus: (cb: (s: { status: string; version: string | null }) => void) => {
+			onUpdateStatus: (cb: (s: UpdateState) => void) => {
 				listeners.push(cb);
 				return () => {};
 			},
@@ -50,10 +51,10 @@ describe("update banner (Wave C)", () => {
 	});
 
 	it("shows the version + Restart once the downloaded push arrives, and Restart installs", async () => {
-		let pushed: ((s: { status: string; version: string | null }) => void) | null = null;
+		let pushed: ((s: UpdateState) => void) | null = null;
 		let installed = 0;
 		(window as { lh?: unknown }).lh = {
-			onUpdateStatus: (cb: (s: { status: string; version: string | null }) => void) => {
+			onUpdateStatus: (cb: (s: UpdateState) => void) => {
 				pushed = cb;
 				return () => {};
 			},
@@ -68,7 +69,7 @@ describe("update banner (Wave C)", () => {
 		assert.equal(host.innerHTML, "", "hidden before the push");
 
 		await new Promise((r) => setTimeout(r, 0));
-		flushSync(() => pushed?.({ status: "downloaded", version: "0.3.1" }));
+		flushSync(() => pushed?.({ status: "downloaded", version: "0.3.1", revision: 1 }));
 		assert.ok(host.innerHTML.includes("0.3.1"), "the version renders");
 		assert.ok(host.innerHTML.includes("Restart"), "the restart affordance renders");