restore legacy cpnp history index

src/App.tsx

@@ -56,6 +56,7 @@ const FORCED_ZERO_STOCK_SKUS = new Set([
 ]);
 
 const BC_SYNC_QUEUE_STORAGE_KEY = 'craze_bc_sync_queue';
+const LEGACY_CPNP_INDEX = 77;
 
 type BcSyncStatus = 'queued' | 'previewed' | 'preview_only' | 'syncing' | 'synced' | 'failed';
 
@@ -413,6 +414,17 @@ export default function App() {
                 }
               });
 
+              // Older cosmetic edits stored CPNP in index 77 before the dedicated
+              // internal CPNP column was stabilized at index 107.
+              const legacyCpnp =
+                hist?.[COLUMNS.CPNP_NO] ??
+                synced?.data?.[COLUMNS.CPNP_NO] ??
+                hist?.[LEGACY_CPNP_INDEX] ??
+                synced?.data?.[LEGACY_CPNP_INDEX];
+              if (legacyCpnp !== undefined && legacyCpnp !== null && String(legacyCpnp).trim() !== '') {
+                finalRow[COLUMNS.CPNP_NO] = legacyCpnp;
+              }
+
               // When a row is still in an edited/pending state, restore editable business fields too.
               // This includes historical CPNP edits that were persisted directly in products.
               if (synced?.status === 'pending' || synced?.status === 'edited') {