- Replace date('Y-m-d') with wp_date('Y-m-d') in increment_drop_counter and
default_drop_counters to respect WordPress timezone settings.
- Update corresponding test assertions to use wp_date() for consistency.
- Clarify in docblock that increment_drop_counter is not atomic under concurrent
submissions; read-modify-write pattern via update_option is acceptable for
low-volume dashboard counters.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>