[Copilot]

npm ci failed because the dependency manifest requested date-fns 4.1.0 and date-fns-tz 3.2.0, while the lockfile still pinned their 2.x versions.

• Dependencies: Updated the lockfile to match the manifest.
• Timezone conversion: Switched to the API provided by date-fns-tz 3:

import {fromZonedTime} from 'date-fns-tz';

const startDateTime = fromZonedTime(startOfWeek(now), ianaTimeZone);