It works-ish

svelte.config.js

@@ -0,0 +1,16 @@
+import adapter from "@sveltejs/adapter-static";
+import { vitePreprocess } from "@sveltejs/vite-plugin-svelte";
+
+const config = {
+  preprocess: vitePreprocess(),
+  kit: {
+    adapter: adapter({
+      pages: ".vite/renderer/main_window",
+    }),
+    router: {
+      type: "hash",
+    },
+  },
+};
+
+export default config;