perf(csr): load component controllers on demand

packages/dev-server/src/prod.ts

@@ -20,6 +20,7 @@ import {
 } from "@wrnexus/router";
 import {
   getActionRuntime,
+  getComponentControllerRuntime,
   getReactiveRuntime,
   getNavRuntime,
   getRealtimeRuntime,
@@ -92,6 +93,8 @@ export interface ProdOptions {
   stylesIncludeFramework?: boolean;
   /** Absolute path to the pre-built reactive runtime. */
   reactivePath?: string;
+  /** Absolute path to the on-demand component controller runtime. */
+  controllersPath?: string;
   /** Absolute directory containing bundled per-WRN browser modules. */
   clientModulesDir?: string;
   /** Absolute path to the pre-built theme stylesheet (`theme.css`). */
@@ -341,6 +344,10 @@ function createProdAssetServer(opts: ProdOptions): AssetServer {
         }
         return new Response(getReactiveRuntime(), { headers: JS_HEADERS });
       }
+      if (pathname === "/__wrnexus/controllers.js") {
+        if (opts.controllersPath) return serveFile(opts.controllersPath, JS_HEADERS);
+        return new Response(getComponentControllerRuntime(), { headers: JS_HEADERS });
+      }
       if (pathname === "/__wrnexus/nav.js")
         return new Response(getNavRuntime(), { headers: JS_HEADERS });
       if (pathname === "/__wrnexus/realtime.js")