Initial state for GitNexus analysis

apps/web/components/empty-state.tsx

@@ -0,0 +1,39 @@
+import { Button } from '@kit/ui/button';
+
+interface EmptyStateProps {
+  icon?: React.ReactNode;
+  title: string;
+  description: string;
+  actionLabel?: string;
+  actionHref?: string;
+  onAction?: () => void;
+}
+
+/**
+ * Reusable empty state with icon + CTA.
+ * Used when DataTables have 0 rows.
+ */
+export function EmptyState({ icon, title, description, actionLabel, actionHref, onAction }: EmptyStateProps) {
+  return (
+    <div className="flex flex-col items-center justify-center rounded-lg border border-dashed p-12 text-center">
+      {icon && (
+        <div className="mb-4 rounded-full bg-muted p-4 text-muted-foreground">
+          {icon}
+        </div>
+      )}
+      <h3 className="text-lg font-semibold">{title}</h3>
+      <p className="mt-1 max-w-sm text-sm text-muted-foreground">{description}</p>
+      {actionLabel && (
+        <div className="mt-6">
+          {actionHref ? (
+            <a href={actionHref}>
+              <Button>{actionLabel}</Button>
+            </a>
+          ) : (
+            <Button onClick={onAction}>{actionLabel}</Button>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}