More accurate views, safer data

A broad cleanup of the places where what you saw could drift from what was stored.

• Fixed cases where certain time formats could freeze a view or make events seem to disappear
• Payment confirmation and AI responses now surface problems clearly instead of failing silently
• Shared pages stay stable even with very large or complex documents
• Refined backup file handling so large, complex backups are processed safely
• Strengthened the reliability of Google Calendar sync
• Payments and subscription checks are safer — if your subscription status can't be verified, we hold the payment and ask you to retry shortly
• Backup restore no longer returns silently empty results on an entitlement check issue — you get a clear error instead
• Plus a broad round of stability and security hardening under the hood