📝 CRITICAL BUG FIXES & EDITOR PREPARATION

• Improved: Auto-updating timestamps in UI (every 30s)
• Fixed: External editor changes not synced
• Fixed: Server JSON always showing "PENDING" status
• Fixed: Deletion tracker race condition in batch deletes
• Fixed: ISO8601 timezone parsing (+01:00, -05:00)
• Improved: E-Tag batch caching performance (~50-100ms faster)