feat(storage): migrate Life OS cloud state to versioned records

public/locales/en.json

@@ -206,6 +206,8 @@
     "untitled": "Untitled memory",
     "noResults": "No memories found.",
     "syncPaused": "CLOUD SYNC PAUSED — CHANGES STAY ON THIS DEVICE",
+    "syncConflict": "SYNC CONFLICT — A LOCAL BACKUP WAS SAVED",
+    "syncConflictConfirm": "This record changed on another device. A local backup has been saved. Replace the cloud record with your local version? Cancel keeps the cloud version.",
     "syncReady": "CLOUD SYNC READY",
     "migrateQuestion": "Move this browser’s Life OS to the cloud?",
     "migrateBody": "Your existing local records will become the first synced copy for this ChatGPT account.",