test: stabilize calendar-1-single-booking Playwright test

Replace whole-DOM getByText("Ledigt") scan with a specific
.status locator and add a .room-info visibility anchor before
the assertion so Playwright doesn't poll an un-rendered tree.
Mirrors the pattern of the passing calendar-0-single-booking
sibling test (line 202).

The previous form was flaky: getByText with toHaveCount(1)
fails fast if .status briefly shows "Optaget" during the
mount-then-effect re-render window (currentTime initializes
from useState(dayjs()) before the page.clock.install propagates
into the React tree). toHaveText keeps polling the same element
until it settles.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: turegjorup

assets/tests/template/template-calendar.spec.js

@@ -233,11 +233,12 @@ test("calendar-0-single-booking: ui tests", async ({ page }) => {
 test("calendar-1-single-booking: ui tests", async ({ page }) => {
   await fixTime(page);
   await page.goto("/template/calendar-1-single-booking");
-  await expect(page.getByText("Ledigt")).toHaveCount(1);
-  await expect(page.getByText("Ledigt")).toBeVisible();
+  await expect(page.locator(".room-info")).toBeVisible();
+
+  const status = page.locator(".status");
+  await expect(status).toHaveText("Ledigt");
 
   await page.clock.runFor(61000);
 
-  await expect(page.getByText("Optaget")).toHaveCount(1);
-  await expect(page.getByText("Optaget")).toBeVisible();
+  await expect(status).toHaveText("Optaget");
 });