fix: sync now resets installed_version when extension removed from server

- Backend: sync_customer_extensions now sets installed_version=NULL when
  extension is missing_on_server (previously only detected drift without
  updating DB)
- Frontend: refresh button now calls /sync endpoint before reloading,
  ensuring the dashboard reflects actual server state

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

dashboard/src/App.jsx

@@ -204,6 +204,20 @@ function CustomerDetail({ customerId }) {
   const [selected, setSelected] = useState(new Set())
   const [batchDeploying, setBatchDeploying] = useState(false)
   const [batchProgress, setBatchProgress] = useState({ current: 0, total: 0, module: '' })
+  const [syncing, setSyncing] = useState(false)
+
+  const syncAndReload = async () => {
+    setSyncing(true)
+    setDeployResult(null)
+    try {
+      await fetch('/sync', {
+        method: 'POST', headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ customer_id: customerId })
+      })
+    } catch (_) {}
+    reload()
+    setSyncing(false)
+  }
 
   if (!customer) return <Loader />
 
@@ -311,10 +325,10 @@ function CustomerDetail({ customerId }) {
             <h3 className="text-xl font-black text-slate-900">{customer.name}</h3>
             <p className="text-sm text-slate-500" dir="ltr">{customer.espocrm_url}</p>
           </div>
-          <button onClick={() => reload()}
-            className="p-2 text-slate-400 hover:text-blue-600 hover:bg-blue-50 rounded-lg transition-all"
-            title="רענון הרחבות">
-            <Icon name="refresh" className="text-lg" />
+          <button onClick={syncAndReload} disabled={syncing}
+            className="p-2 text-slate-400 hover:text-blue-600 hover:bg-blue-50 rounded-lg transition-all disabled:opacity-50"
+            title="סנכרון מול השרת">
+            <Icon name="sync" className={`text-lg ${syncing ? 'animate-spin' : ''}`} />
           </button>
           <button onClick={() => setEditing(true)}
             className="p-2 text-slate-400 hover:text-blue-600 hover:bg-blue-50 rounded-lg transition-all"