v1.2.2 - Backward Compatibility for v1.2.0 Users

Critical Bugfix
• Server restore now finds ALL notes (Root + /notes/)
• Users upgrading from v1.2.0 no longer lose data
• Old notes from Root folder are found during restore

Technical Details
• Dual-mode download only active for server restore
• Normal syncs remain fast (scan only /notes/)
• Automatic deduplication prevents duplicates
• Smooth migration: New uploads go to /notes/, old ones remain readable