Kyle Pope e22cad1d86 Fix QA findings: firstDay reactivity, state revert, helper extraction ...

- W1: Add key prop to FullCalendar so firstDay change triggers remount
- W2: Revert firstDayOfWeek toggle state on API failure
- S1: Extract _rule_int helper in recurrence service to reduce duplication

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-22 02:02:15 +08:00

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recurrence.py

Fix QA findings: firstDay reactivity, state revert, helper extraction

2026-02-22 02:02:15 +08:00