fix: bare-domain module URLs now show landing pages instead of demo hub

rspace.online/{moduleId} was rewriting to /demo/{moduleId}, serving the
internal nav hub. Now calls renderModuleLanding() with the module's rich
landing page when available, falling back to demo rewrite otherwise.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/index.ts

@@ -84,7 +84,7 @@ import { vnbModule } from "../modules/rvnb/mod";
 import { crowdsurfModule } from "../modules/crowdsurf/mod";
 import { spaces, createSpace, resolveCallerRole, roleAtLeast } from "./spaces";
 import type { SpaceRoleString } from "./spaces";
-import { renderShell, renderSubPageInfo, renderOnboarding, setFragmentMode } from "./shell";
+import { renderShell, renderSubPageInfo, renderModuleLanding, renderOnboarding, setFragmentMode } from "./shell";
 import { renderOutputListPage } from "./output-list";
 import { renderMainLanding, renderSpaceDashboard } from "./landing";
 import { syncServer } from "./sync-instance";
@@ -3291,8 +3291,16 @@ const server = Bun.serve<WSData>({
 				const mod = allModules.find((m) => m.id === firstSegment);
 
 				if (mod) {
-					// rspace.online/{moduleId} → rewrite to /demo/{moduleId} (serve app in shell)
+					// rspace.online/{moduleId} → show module landing page (or fallback to demo shell)
 					if (pathSegments.length === 1) {
+						if (mod.landingPage) {
+							const html = renderModuleLanding({
+								module: mod,
+								modules: getModuleInfoList(),
+								bodyHTML: mod.landingPage(),
+							});
+							return new Response(html, { headers: { "Content-Type": "text/html; charset=utf-8" } });
+						}
 						const rewrittenPath = `/demo/${firstSegment}`;
 						const rewrittenUrl = new URL(rewrittenPath + url.search, `http://localhost:${PORT}`);
 						return app.fetch(new Request(rewrittenUrl, req));