feat(desktop): error card offers Nous support link on Portal-auth sessions

Sessions running on provider 'nous' get a 'Nous support' action on the
failed-turn card, opening the portal help hub
(https://portal.nousresearch.com/help — docs, Discord, GitHub) in the
external browser. All five locales + docs updated.

apps/desktop/src/components/assistant-ui/thread/assistant-message.tsx

@@ -31,6 +31,7 @@ import { Codicon } from '@/components/ui/codicon'
 import { CopyButton } from '@/components/ui/copy-button'
 import { useI18n } from '@/i18n'
 import { type ErrorSurface, formatErrorDiagnostics } from '@/lib/error-surface'
+import { openExternalLink } from '@/lib/external-link'
 import { triggerHaptic } from '@/lib/haptics'
 import { AudioLines, GitForkIcon, Loader2Icon, RefreshCwIcon, SmilePlusIcon, VolumeXIcon, XIcon } from '@/lib/icons'
 import { extractPreviewTargets } from '@/lib/preview-targets'
@@ -39,13 +40,17 @@ import { useEnterAnimation } from '@/lib/use-enter-animation'
 import { cn } from '@/lib/utils'
 import { playSpeechText, stopVoicePlayback } from '@/lib/voice-playback'
 import { notifyError } from '@/store/notifications'
-import { $currentModel } from '@/store/session'
+import { $currentModel, $currentProvider } from '@/store/session'
 import { $voicePlayback } from '@/store/voice-playback'
 
 // Stable empty identity for the settled-parts selector — a fresh [] per render
 // would re-derive the changed-files card on every message re-render.
 const EMPTY_PARTS: readonly unknown[] = []
 
+// Nous Portal's help hub (docs, Discord, GitHub, support) — the error card's
+// "Nous support" action for sessions running on Portal auth.
+const NOUS_SUPPORT_URL = 'https://portal.nousresearch.com/help'
+
 // PERF: hoisted to module scope so the element OBJECT is identical on every
 // render of every assistant message. React bails out of re-rendering a child
 // whose element identity is unchanged, so a status flip on the message root
@@ -490,6 +495,13 @@ const ErrorRecoveryActions: FC = () => {
   // child mounts only when one is (see SwitchProviderAction).
   const inRouter = useInRouterContext()
   const model = useStore($currentModel)
+  const provider = useStore($currentProvider)
+
+  // Nous Portal users get a direct line to Nous support (docs/Discord/GitHub
+  // hub behind their portal account). Provider === 'nous' means the session
+  // runs on Portal auth — the "logged in" signal that's available
+  // synchronously without an extra billing query per error card.
+  const showNousSupport = provider.trim().toLowerCase() === 'nous'
 
   // Retry = assistant-ui reload (same wiring as the footer's refresh action):
   // re-runs the failed turn's prompt in place. Suppressed when the classifier
@@ -541,6 +553,15 @@ const ErrorRecoveryActions: FC = () => {
         </ActionBarPrimitive.Reload>
       )}
       {showSwitchProvider && inRouter && <SwitchProviderAction label={copy.errorSwitchProvider} />}
+      {showNousSupport && (
+        <button
+          className="aui-error-action"
+          onClick={() => openExternalLink(NOUS_SUPPORT_URL)}
+          type="button"
+        >
+          {copy.errorNousSupport}
+        </button>
+      )}
       {window.hermesDesktop?.logsRoot && (
         <button className="aui-error-action" onClick={() => void openLogs()} type="button">
           {copy.errorOpenLogs}

apps/desktop/src/i18n/ar.ts

@@ -2449,6 +2449,7 @@ export const ar = defineLocale({
       errorSwitchProvider: 'تبديل المزوّد',
       errorOpenLogs: 'فتح السجلات',
       errorOpenLogsFailed: 'تعذّر فتح مجلد السجلات',
+      errorNousSupport: 'دعم Nous',
       errorCopyDiagnostics: 'نسخ التشخيصات',
       filesChanged: count => `${count} ملفات تم تغييرها`,
       reviewChanges: 'مراجعة',

apps/desktop/src/i18n/en.ts

@@ -3094,6 +3094,7 @@ export const en: Translations = {
       errorSwitchProvider: 'Switch provider',
       errorOpenLogs: 'Open logs',
       errorOpenLogsFailed: 'Could not open the logs folder',
+      errorNousSupport: 'Nous support',
       errorCopyDiagnostics: 'Copy diagnostics',
       filesChanged: count => (count === 1 ? '1 file changed' : `${count} files changed`),
       reviewChanges: 'Review',

apps/desktop/src/i18n/ja.ts

@@ -2746,6 +2746,7 @@ export const ja = defineLocale({
       errorSwitchProvider: 'プロバイダーを切り替え',
       errorOpenLogs: 'ログを開く',
       errorOpenLogsFailed: 'ログフォルダを開けませんでした',
+      errorNousSupport: 'Nousサポート',
       errorCopyDiagnostics: '診断情報をコピー',
       filesChanged: count => `${count} 件のファイルを変更`,
       reviewChanges: 'レビュー',

apps/desktop/src/i18n/types.ts

@@ -2665,6 +2665,7 @@ export interface Translations {
       errorSwitchProvider: string
       errorOpenLogs: string
       errorOpenLogsFailed: string
+      errorNousSupport: string
       errorCopyDiagnostics: string
       filesChanged: (count: number) => string
       reviewChanges: string

apps/desktop/src/i18n/zh-hant.ts

@@ -2656,6 +2656,7 @@ export const zhHant = defineLocale({
       errorSwitchProvider: '切換服務商',
       errorOpenLogs: '開啟日誌',
       errorOpenLogsFailed: '無法開啟日誌資料夾',
+      errorNousSupport: 'Nous 支援',
       errorCopyDiagnostics: '複製診斷資訊',
       filesChanged: count => `${count} 個檔案已變更`,
       reviewChanges: '檢視',

apps/desktop/src/i18n/zh.ts

@@ -3258,6 +3258,7 @@ export const zh: Translations = {
       errorSwitchProvider: '切换服务商',
       errorOpenLogs: '打开日志',
       errorOpenLogsFailed: '无法打开日志文件夹',
+      errorNousSupport: 'Nous 支持',
       errorCopyDiagnostics: '复制诊断信息',
       filesChanged: count => `${count} 个文件已更改`,
       reviewChanges: '查看',

website/docs/user-guide/desktop.md

@@ -420,6 +420,9 @@ generic error toast. The card offers recovery actions matched to the failure:
   deterministically reproduce the failure, e.g. a content-policy rejection).
 - **Switch provider** — jumps to Settings → Models for provider, endpoint,
   auth, and billing failures.
+- **Nous support** — shown when the session runs on Nous Portal auth; opens
+  the [portal help hub](https://portal.nousresearch.com/help) (docs, Discord,
+  GitHub) in your browser.
 - **Open logs** — opens `HERMES_HOME/logs` in your file manager.
 - **Copy diagnostics** — copies a compact plain-text summary (layer, code,
   provider/model, error message) you can paste into a bug report or Discord.