feat(routes): add access-denied route and update authentication flow

- Introduced a new Access Denied route to handle unauthorized access.
- Updated routing logic to redirect to the Access Denied page when necessary.
- Enhanced authentication checks to prevent infinite redirect loops and improve user experience.
- Adjusted API client to handle JWT rejection scenarios more gracefully.

apps/web/src/lib/api-client.ts

@@ -30,6 +30,13 @@ async function handoffOnUnauthorized(): Promise<void> {
     redirectToPortalLogin(`${window.location.origin}/auth/callback`)
     return
   }
+  // Cooldown / recent handoff — stop SSO storm (wrong JWT secret / issuer).
+  if (cfg.required || isAuthEnabled()) {
+    window.location.assign(
+      `${window.location.origin}/auth/callback?error=jwt_rejected`,
+    )
+    return
+  }
   if (!cfg.required && !isAuthEnabled()) {
     window.location.href = '/login'
   }

apps/web/src/lib/app-switcher-config.ts

@@ -62,5 +62,11 @@ export function getAppUrl(
 export function getCurrentApp(
   config: AppSwitcherConfig = DEFAULT_APP_SWITCHER_CONFIG,
 ): AppSwitcherEntry {
-  return config.apps.find((app) => app.id === CURRENT_APP_ID) ?? config.apps[0]!
+  const current = config.apps.find((app) => app.id === CURRENT_APP_ID)
+  if (current) return current
+  if (config.apps[0]) return config.apps[0]
+  return (
+    DEFAULT_APP_SWITCHER_CONFIG.apps.find((a) => a.id === CURRENT_APP_ID) ??
+    DEFAULT_APP_SWITCHER_CONFIG.apps[0]!
+  )
 }

apps/web/src/lib/auth.ts

@@ -255,5 +255,5 @@ export function firstAllowedPath(): string {
     const perm = permissionForPath(path)
     if (!perm || can(perm)) return path
   }
-  return '/'
+  return '/access-denied'
 }

apps/web/src/routeTree.gen.ts

@@ -10,6 +10,7 @@
 
 import { Route as rootRouteImport } from './routes/__root'
 import { Route as LoginRouteImport } from './routes/login'
+import { Route as AccessDeniedRouteImport } from './routes/access-denied'
 import { Route as AuthRouteImport } from './routes/_auth'
 import { Route as AuthIndexRouteImport } from './routes/_auth/index'
 import { Route as AuthCallbackRouteImport } from './routes/auth.callback'
@@ -28,6 +29,11 @@ const LoginRoute = LoginRouteImport.update({
   path: '/login',
   getParentRoute: () => rootRouteImport,
 } as any)
+const AccessDeniedRoute = AccessDeniedRouteImport.update({
+  id: '/access-denied',
+  path: '/access-denied',
+  getParentRoute: () => rootRouteImport,
+} as any)
 const AuthRoute = AuthRouteImport.update({
   id: '/_auth',
   getParentRoute: () => rootRouteImport,
@@ -91,6 +97,7 @@ const AuthSettingsAppearanceRoute = AuthSettingsAppearanceRouteImport.update({
 
 export interface FileRoutesByFullPath {
   '/': typeof AuthIndexRoute
+  '/access-denied': typeof AccessDeniedRoute
   '/login': typeof LoginRoute
   '/settings': typeof AuthSettingsRouteRouteWithChildren
   '/aliases': typeof AuthAliasesRoute
@@ -104,6 +111,7 @@ export interface FileRoutesByFullPath {
   '/settings/': typeof AuthSettingsIndexRoute
 }
 export interface FileRoutesByTo {
+  '/access-denied': typeof AccessDeniedRoute
   '/login': typeof LoginRoute
   '/aliases': typeof AuthAliasesRoute
   '/nodes': typeof AuthNodesRoute
@@ -119,6 +127,7 @@ export interface FileRoutesByTo {
 export interface FileRoutesById {
   __root__: typeof rootRouteImport
   '/_auth': typeof AuthRouteWithChildren
+  '/access-denied': typeof AccessDeniedRoute
   '/login': typeof LoginRoute
   '/_auth/settings': typeof AuthSettingsRouteRouteWithChildren
   '/_auth/aliases': typeof AuthAliasesRoute
@@ -136,6 +145,7 @@ export interface FileRouteTypes {
   fileRoutesByFullPath: FileRoutesByFullPath
   fullPaths:
     | '/'
+    | '/access-denied'
     | '/login'
     | '/settings'
     | '/aliases'
@@ -149,6 +159,7 @@ export interface FileRouteTypes {
     | '/settings/'
   fileRoutesByTo: FileRoutesByTo
   to:
+    | '/access-denied'
     | '/login'
     | '/aliases'
     | '/nodes'
@@ -163,6 +174,7 @@ export interface FileRouteTypes {
   id:
     | '__root__'
     | '/_auth'
+    | '/access-denied'
     | '/login'
     | '/_auth/settings'
     | '/_auth/aliases'
@@ -179,6 +191,7 @@ export interface FileRouteTypes {
 }
 export interface RootRouteChildren {
   AuthRoute: typeof AuthRouteWithChildren
+  AccessDeniedRoute: typeof AccessDeniedRoute
   LoginRoute: typeof LoginRoute
   AuthCallbackRoute: typeof AuthCallbackRoute
 }
@@ -192,6 +205,13 @@ declare module '@tanstack/react-router' {
       preLoaderRoute: typeof LoginRouteImport
       parentRoute: typeof rootRouteImport
     }
+    '/access-denied': {
+      id: '/access-denied'
+      path: '/access-denied'
+      fullPath: '/access-denied'
+      preLoaderRoute: typeof AccessDeniedRouteImport
+      parentRoute: typeof rootRouteImport
+    }
     '/_auth': {
       id: '/_auth'
       path: ''
@@ -318,6 +338,7 @@ const AuthRouteWithChildren = AuthRoute._addFileChildren(AuthRouteChildren)
 
 const rootRouteChildren: RootRouteChildren = {
   AuthRoute: AuthRouteWithChildren,
+  AccessDeniedRoute: AccessDeniedRoute,
   LoginRoute: LoginRoute,
   AuthCallbackRoute: AuthCallbackRoute,
 }

apps/web/src/routes/__root.tsx

@@ -16,7 +16,8 @@ export const Route = createRootRouteWithContext<RouterContext>()({
   beforeLoad: async ({ location }) => {
     const isLogin = location.pathname === '/login'
     const isCallback = location.pathname === '/auth/callback'
-    if (isCallback) return
+    const isAccessDenied = location.pathname === '/access-denied'
+    if (isCallback || isAccessDenied) return
 
     const cfg = await ensureAuthConfig()
     const token = getToken()

apps/web/src/routes/_auth.tsx

@@ -30,16 +30,19 @@ export const Route = createFileRoute('/_auth')({
       await new Promise(() => {})
       return
     }
+    // NEVER redirect to `/` here — `/` is under `_auth` and causes an infinite loop
+    // (browser: «Страница не отвечает»).
     if (!claims.apps.includes('cdn')) {
-      throw redirect({ to: '/' })
+      throw redirect({ to: '/access-denied' })
     }
 
     const perm = permissionForPath(location.pathname)
     if (perm && !can(perm)) {
       const fallback = firstAllowedPath()
-      if (fallback !== location.pathname) {
+      if (fallback === '/access-denied' || fallback === location.pathname) {
-        throw redirect({ to: fallback as '/' })
+        throw redirect({ to: '/access-denied' })
       }
+      throw redirect({ to: fallback as '/' })
     }
   },
   component: () => (

apps/web/src/routes/access-denied.tsx

@@ -0,0 +1,47 @@
+import { createFileRoute } from '@tanstack/react-router'
+import {
+  authPortalUrl,
+  clearToken,
+  ensureAuthConfig,
+  redirectToPortalLogout,
+} from '@/lib/auth'
+import { Button } from '@cdnmanager/ui/components/button'
+
+export const Route = createFileRoute('/access-denied')({
+  beforeLoad: async () => {
+    await ensureAuthConfig()
+  },
+  component: AccessDeniedPage,
+})
+
+function AccessDeniedPage() {
+  return (
+    <div className="flex min-h-svh flex-col items-center justify-center gap-4 p-6 text-center">
+      <h1 className="text-lg font-semibold">Нет доступа к CDN Manager</h1>
+      <p className="text-muted-foreground max-w-md text-sm">
+        В JWT нет приложения <code className="text-xs">cdn</code> или нужных прав{' '}
+        <code className="text-xs">cdn:*</code>. Выдайте доступ в Auth Portal →
+        Админка → пользователи, затем войдите снова.
+      </p>
+      <div className="flex flex-wrap items-center justify-center gap-2">
+        <Button
+          type="button"
+          variant="outline"
+          render={<a href={`${authPortalUrl().replace(/\/$/, '')}/admin`} />}
+        >
+          Открыть портал
+        </Button>
+        <Button
+          type="button"
+          variant="default"
+          onClick={() => {
+            clearToken()
+            redirectToPortalLogout()
+          }}
+        >
+          Выйти
+        </Button>
+      </div>
+    </div>
+  )
+}

apps/web/src/routes/auth.callback.tsx

@@ -7,11 +7,24 @@ import {
   firstAllowedPath,
   getClaims,
   getToken,
+  markPortalHandoff,
   parseHashToken,
   redirectToPortalLogin,
   setToken,
 } from '@/lib/auth'
 
+async function verifyTokenAccepted(token: string): Promise<boolean> {
+  try {
+    const res = await fetch('/api/v1/locations', {
+      headers: { Authorization: `Bearer ${token}` },
+    })
+    // 401 = JWT rejected (secret/issuer). 403 = JWT ok, RBAC — still accepted.
+    return res.status !== 401
+  } catch {
+    return true
+  }
+}
+
 export const Route = createFileRoute('/auth/callback')({
   validateSearch: (search: Record<string, unknown>) => ({
     error: typeof search.error === 'string' ? search.error : undefined,
@@ -19,25 +32,49 @@ export const Route = createFileRoute('/auth/callback')({
   beforeLoad: async ({ search }) => {
     await ensureAuthConfig()
 
-    if (search.error === 'sso_loop') {
+    if (search.error === 'sso_loop' || search.error === 'jwt_rejected') {
       return
     }
 
     const { accessToken } = parseHashToken(window.location.hash)
     if (accessToken) {
       setToken(accessToken)
+      // Start cooldown so a following API 401 cannot re-enter portal SSO storm.
+      markPortalHandoff()
       clearPortalHandoffFlag()
+
       const claims = getClaims()
       if (!claims) {
         clearToken()
-        window.location.assign(authPortalUrl())
+        throw redirect({
-        await new Promise(() => {})
+          to: '/auth/callback',
-        return
+          search: { error: 'jwt_rejected' },
+        })
       }
-      throw redirect({ to: firstAllowedPath() as '/' })
+      if (!claims.apps.includes('cdn')) {
+        throw redirect({ to: '/access-denied' })
+      }
+
+      const ok = await verifyTokenAccepted(accessToken)
+      if (!ok) {
+        clearToken()
+        throw redirect({
+          to: '/auth/callback',
+          search: { error: 'jwt_rejected' },
+        })
+      }
+
+      const next = firstAllowedPath()
+      if (next === '/access-denied') {
+        throw redirect({ to: '/access-denied' })
+      }
+      throw redirect({ to: next as '/' })
     }
     if (getToken() && getClaims()) {
       clearPortalHandoffFlag()
+      if (!getClaims()!.apps.includes('cdn')) {
+        throw redirect({ to: '/access-denied' })
+      }
       throw redirect({ to: firstAllowedPath() as '/' })
     }
     const ok = redirectToPortalLogin(`${window.location.origin}/auth/callback`)
@@ -51,13 +88,14 @@ export const Route = createFileRoute('/auth/callback')({
 
 function AuthCallbackPage() {
   const { error } = Route.useSearch()
-  if (error === 'sso_loop') {
+  if (error === 'sso_loop' || error === 'jwt_rejected') {
     return (
       <div className="flex min-h-svh flex-col items-center justify-center gap-3 p-6 text-center">
         <h1 className="text-lg font-semibold">Сессия не принята</h1>
         <p className="text-muted-foreground max-w-md text-sm">
-          Повторный вход через portal остановлен (защита от цикла редиректов).
+          {error === 'jwt_rejected'
-          Обычно это несовпадение JWT_SECRET / ISSUER или просроченный токен.
+            ? 'API отклонил JWT (обычно разный AUTH_JWT_SECRET / AUTH_ISSUER с portal). Проверьте .env контейнера CDN Manager.'
+            : 'Повторный вход через portal остановлен (защита от цикла редиректов). Обычно это несовпадение JWT_SECRET / ISSUER или просроченный токен.'}{' '}
           Войдите заново на portal, затем откройте CDN Manager.
         </p>
         <a className="text-primary text-sm underline" href={authPortalUrl()}>

docs/deploy-traefik.md

@@ -100,6 +100,8 @@ nano .env   # заполнить секреты
 
 На стороне портала добавьте origin в `RETURN_TO_ALLOWLIST` (`https://cdn.shnt.top`) и выдайте app **`cdn`** + права `cdn:*`. App Switcher URL: тот же origin.
 
+**Важно:** `AUTH_JWT_SECRET` в CDN Manager **должен совпадать** с `JWT_SECRET` auth-portal, `AUTH_ISSUER` — с `ISSUER` портала. Иначе после SSO UI зацикливается / «Страница не отвечает».
+
 ---
 
 ## 3. Запуск