Fix wallet connect performance with bounded address data fetching

src/contexts/wallet-context.tsx

@@ -759,23 +759,42 @@ export const WalletProvider = ({ children, testXpub }: { children: ReactNode; te
     if (!hasCachedData) {
       console.log(`[WalletContext] Starting progressive discovery for wallet switch ${activeXpub.substring(0, 20)}...`);
 
+      let receivedComplete = false;
       const result = await getWalletDataProgressive(activeXpub, currency, (partialData: PartialWalletData) => {
         if (requestId !== activeRequestId.current) {
           return;
         }
+        // Once a completion update has been applied, ignore any late or
+        // out-of-order partial emit so it can't revert the finished dashboard
+        // back to a partial (lower-balance / fewer-tx) view.
+        if (receivedComplete) {
+          return;
+        }
         // Real-time UI updates as addresses are discovered!
         console.log(`[WalletContext] Progressive update - ${partialData.discoveryProgress.addressesWithActivity} addresses, ${partialData.transactions.length} txs, ${partialData.balanceBTC} BTC`);
 
         // Update discovery progress
         setDiscoveryProgress(partialData.discoveryProgress);
-        
+
         // Update wallet data with partial results
         // Convert PartialWalletData to WalletData by removing progressive fields
         const { discoveryProgress, isComplete, ...walletData } = partialData;
-        setData(walletData as WalletData);
+        // During the discovery phase we receive progress-only updates with no
+        // wallet data yet. Don't clobber the loading skeleton with an empty
+        // snapshot - only surface data once there's something to show (or when
+        // discovery has completed, which also covers the empty-wallet case).
+        const hasContent =
+          isComplete ||
+          walletData.transactions.length > 0 ||
+          walletData.balanceBTC > 0 ||
+          walletData.usedAddressCount > 0;
+        if (hasContent) {
+          setData(walletData as WalletData);
+        }
 
         // If complete, mark as no longer discovering
         if (partialData.isComplete) {
+          receivedComplete = true;
           setIsDiscovering(false);
           setIsLoading(false);
         }