fix: initialize hosted Studio behind HTTPS reverse proxies

app/middleware/design-studio.ts

@@ -2,6 +2,7 @@ import type { Middleware } from "@wrnexus/core";
 import type { createStudioHandler } from "@wrnexus/design-studio/server";
 import { studioAI } from "../lib/studio-ai.ts";
 import { addStudioGuide, studioHelpScript } from "../lib/studio-guide.ts";
+import { studioRequest } from "../lib/studio-origin.ts";
 
 let studio: ReturnType<typeof createStudioHandler> | undefined;
 let ai: ReturnType<typeof studioAI> | undefined;
@@ -14,8 +15,10 @@ const designStudio: Middleware = async (ctx, next) => {
       headers: { location: "/design-studio/" },
     });
   if (!url.pathname.startsWith("/design-studio/")) return next();
+  const request = studioRequest(ctx.req);
+  if (request instanceof Response) return request;
   ai ??= studioAI(process.env.APIMART_API_KEY?.trim());
-  const generated = await ai(ctx.req);
+  const generated = await ai(request);
   if (generated) return generated;
   if (
     url.pathname === "/design-studio/site-help.js" &&
@@ -39,7 +42,7 @@ const designStudio: Middleware = async (ctx, next) => {
       studio = undefined;
       throw error;
     });
-  const response = await (await studio)(ctx.req);
+  const response = await (await studio)(request);
   if (
     url.pathname === "/design-studio/" &&
     response.ok &&