feat: keep dev server alive during HMR updates

packages/dev-server/src/assets.ts

@@ -36,6 +36,7 @@ export interface DevStyles {
 /** A dev asset server also supports invalidating its caches in-process. */
 export interface DevAssetServer extends AssetServer {
   invalidateCss(): void;
+  updateSchemas(code: string): void;
 }
 
 function jsResponse(code: string): Response {
@@ -65,12 +66,17 @@ export function createDevAssetServer(
   schemasJs?: string,
 ): DevAssetServer {
   let cssCache: string | null = null;
+  let schemasCode = schemasJs ?? "window.__wireSchemas={};";
 
   return {
     invalidateCss() {
       cssCache = null;
     },
 
+    updateSchemas(code) {
+      schemasCode = code;
+    },
+
     async serve(pathname: string): Promise<Response | null> {
       if (pathname === "/__wrnexus/reactive.js") return jsResponse(getReactiveRuntime());
       if (pathname === "/__wrnexus/nav.js") return jsResponse(getNavRuntime());
@@ -83,8 +89,7 @@ export function createDevAssetServer(
       if (pathname.startsWith(UPLOADS_PREFIX)) {
         return (await serveStoredFile(pathname)) ?? new Response("Not Found", { status: 404 });
       }
-      if (pathname === "/__wrnexus/schemas.js")
-        return jsResponse(schemasJs ?? "window.__wireSchemas={};");
+      if (pathname === "/__wrnexus/schemas.js") return jsResponse(schemasCode);
 
       if (pathname === "/__wrnexus/ui.css") {
         return uiCss ? cssResponse(uiCss) : new Response("Not Found", { status: 404 });