fix: settings sync stats loading (v1.3.60)

- Fixed loadSyncStats() to correctly parse API response
- Customers API returns {customers: [...]} not array directly
- Added const data = await response.json() and data.customers
- Fixes sync stats counters showing NaN or incorrect values

VERSION

@@ -1 +1 @@
-1.3.59
+1.3.60

app/settings/frontend/settings.html

@@ -1374,7 +1374,8 @@ async function loadSyncStats() {
     try {
         const response = await fetch('/api/v1/customers?limit=10000');
         if (!response.ok) throw new Error('Failed to load customers');
-        const customers = await response.json();
+        const data = await response.json();
+        const customers = data.customers || [];
         
         const stats = {
             total: customers.length,