feat: enhance error handling in DashboardPage and add retry functionality

src/components/dashboard/DashboardLoadingStates.tsx

@@ -56,7 +56,7 @@ export function LoadingSkeleton() {
   )
 }
 
-export function ErrorState({ error }: { error: string }) {
+export function ErrorState({ error, onRetry }: { error: string; onRetry: () => void }) {
   return (
     <AppLayout
       breadcrumb={{
@@ -64,7 +64,7 @@ export function ErrorState({ error }: { error: string }) {
       }}
     >
       <div className="flex-1 rounded-xl bg-muted/50 p-4">
-        <DashboardHeader onRefresh={() => {}} isRefreshing={false} />
+        <DashboardHeader onRefresh={onRetry} isRefreshing={false} />
         <div className="border-2 border-dashed border-destructive/25 rounded-lg p-4">
           <p className="text-destructive">Error loading statistics: {error}</p>
         </div>