fix(status): keep browser URL on status subdomain root without /status redirect

Previously the injected urlFixScript called history.replaceState to rewrite
"/" to "/status", which visibly changed the address bar to /status when
visiting the dedicated status subdomain. Replace the rewrite with a window
flag and mount PublicStatusPage at "/" in the Vue router when the flag is
set, so the URL stays at the subdomain root.

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

Author: btouchard

frontend/src/router/index.ts

@@ -35,9 +35,20 @@ const NodesPage = () => import('../pages/NodesPage.vue')
 const EscalationPage = () => import('../pages/EscalationPage.vue')
 const ChannelsPage = () => import('../pages/ChannelsPage.vue')
 
+const isStatusSubdomain = (window as unknown as { __MAINTENANT_STATUS?: boolean }).__MAINTENANT_STATUS === true
+
 const router = createRouter({
   history: createWebHistory(import.meta.env.BASE_URL),
   routes: [
+    ...(isStatusSubdomain
+      ? [
+          {
+            path: '/',
+            component: PublicLayout,
+            children: [{ path: '', name: 'status-public', component: PublicStatusPage }],
+          },
+        ]
+      : []),
     {
       path: '/',
       component: DefaultLayout,
@@ -68,7 +79,7 @@ const router = createRouter({
     {
       path: '/status',
       component: PublicLayout,
-      children: [{ path: '', name: 'status-public', component: PublicStatusPage }],
+      children: [{ path: '', name: isStatusSubdomain ? 'status-public-admin' : 'status-public', component: PublicStatusPage }],
     },
   ],
 })

internal/status/handler.go

@@ -79,11 +79,7 @@ func (h *Handler) Register(mux *http.ServeMux, mw Middleware) {
 	}
 }
 
-// urlFixScript runs before Vue initialises and rewrites "/" to "/status" so that
-// Vue Router renders PublicStatusPage when the status subdomain is accessed at root
-// (Traefik replacepathregex rewrites "/" → "/status/" at the backend level, but the
-// browser URL stays at "/", so Vue Router needs a nudge).
-const urlFixScript = `<script>if(window.location.pathname==='/'){history.replaceState({},'','/status')}</script>`
+const urlFixScript = `<script>window.__MAINTENANT_STATUS=true</script>`
 
 // HandleStatusPage serves the Vue SPA index.html for the /status/ path.
 // A small inline script is injected so that Vue Router initialises at /status when