feat: add streaming client-side CSV/GeoJSON/shapefile bulk export pipeline

src/app/export/page.tsx

@@ -0,0 +1,31 @@
+"use client";
+
+import { useState } from "react";
+import { ExportDialog } from "@/components/panels/ExportDialog";
+
+/**
+ * Standalone host page for the bulk export dialog. Kept separate from the main
+ * dashboard so the export flow can be driven and verified end to end.
+ */
+export default function ExportPage() {
+  const [open, setOpen] = useState(false);
+
+  return (
+    <main className="flex min-h-screen flex-col items-center justify-center gap-6 p-8">
+      <h1 className="text-xl font-bold tracking-tight">Resource Data Export</h1>
+      <p className="max-w-md text-center text-sm text-muted-foreground">
+        Export filtered resource-consumption data as CSV, GeoJSON or a zipped
+        shapefile. Large queries are streamed in chunks and written straight to
+        disk.
+      </p>
+      <button
+        onClick={() => setOpen(true)}
+        data-testid="open-export"
+        className="rounded-lg bg-foreground px-5 py-2.5 text-sm font-medium text-background transition-opacity hover:opacity-90"
+      >
+        Open Export
+      </button>
+      <ExportDialog open={open} onClose={() => setOpen(false)} />
+    </main>
+  );
+}