* fix: validate occurrence count from URL params and refactor validation logic
- Initialize occurrence count from URL query parameter on page load
* fix: change query parameter name from occurenceCount to recurringEventCount
* refactor: simplify occurrence count validation logic
* fix: prevent NaN from being set in recurring event count query parameter
* fix: prevent overlay calendar toggle from overwriting query params
* fix: sync occurrence count state with max occurrences limit
* refactor: rename occurenceCount to recurringEventCountQueryParam
* fix: prevent invalid recurring event count from updating state
- Added validation guard to only update state when recurringEventCountQueryParam is valid (not null or NaN)
- Simplified URL update logic by removing unnecessary empty string fallback
* feat: add recurring event count badge for mobile (#24991)
* feat: display recurring event count badge in mobile
* feat: update recurring event translation key for clarity
