Release v0.2.9: runtime reliability and admin UX refresh

- ship runtime reliability, watcher/scanner hardening, and hardware hot reload

- refresh admin/settings UX and add Playwright reliability coverage

- standardize frontend workflow on Bun and update deploy/docs

web-e2e/tests/helpers.ts

@@ -0,0 +1,19 @@
+import { expect, type Page, type Route } from "@playwright/test";
+
+export async function fulfillJson(route: Route, status: number, body: unknown): Promise<void> {
+  await route.fulfill({
+    status,
+    contentType: "application/json",
+    body: JSON.stringify(body),
+  });
+}
+
+export async function mockEngineStatus(page: Page): Promise<void> {
+  await page.route("**/api/engine/status", async (route) => {
+    await fulfillJson(route, 200, { status: "ok" });
+  });
+}
+
+export async function expectVisibleError(page: Page, message: string): Promise<void> {
+  await expect(page.getByText(message).first()).toBeVisible();
+}