test: clear toasts before driving the local credits popover

The OSS boot surfaces startup toasts the mocked cloud boot does not, and a
toast overlay can intercept the avatar click. Mirrors the guard
currentUserPopoverCredits.spec.ts already uses for the same popover.

Author: Glary-Bot

browser_tests/tests/localCreditsGating.spec.ts

@@ -63,6 +63,7 @@ test.describe(
       const userButton = page.getByTestId(TestIds.user.currentUserButton)
 
       await expect(userButton).toBeVisible()
+      await comfyPage.toast.closeToasts()
 
       await userButton.click()
       await expect(