fix(control-ui): serve dashboard at root

src/gateway/control-ui.ts

@@ -4,6 +4,7 @@ import path from "node:path";
 import { fileURLToPath } from "node:url";
 
 const UI_PREFIX = "/ui/";
+const ROOT_PREFIX = "/";
 
 function resolveControlUiRoot(): string | null {
   const here = path.dirname(fileURLToPath(import.meta.url));
@@ -88,13 +89,11 @@ export function handleControlUiHttpRequest(
 
   if (url.pathname === "/ui") {
     res.statusCode = 302;
-    res.setHeader("Location", UI_PREFIX);
+    res.setHeader("Location", "/");
     res.end();
     return true;
   }
 
-  if (!url.pathname.startsWith(UI_PREFIX)) return false;
-
   const root = resolveControlUiRoot();
   if (!root) {
     res.statusCode = 503;
@@ -105,7 +104,12 @@ export function handleControlUiHttpRequest(
     return true;
   }
 
-  const rel = url.pathname.slice(UI_PREFIX.length);
+  const rel = (() => {
+    if (url.pathname === ROOT_PREFIX) return "";
+    if (url.pathname.startsWith(UI_PREFIX)) return url.pathname.slice(UI_PREFIX.length);
+    if (url.pathname.startsWith("/assets/")) return url.pathname.slice(1);
+    return url.pathname.slice(1);
+  })();
   const requested = rel && !rel.endsWith("/") ? rel : `${rel}index.html`;
   const fileRel = requested || "index.html";
   if (!isSafeRelativePath(fileRel)) {

src/gateway/server.ts

@@ -848,12 +848,6 @@ export async function startGatewayServer(
     if (String(req.headers.upgrade ?? "").toLowerCase() === "websocket") return;
 
     if (controlUiEnabled) {
-      if (req.url === "/") {
-        res.statusCode = 302;
-        res.setHeader("Location", "/ui/");
-        res.end();
-        return;
-      }
       if (handleControlUiHttpRequest(req, res)) return;
     }