fix(health): surface ollama endpoint diagnosis

apps/web/src/components/shared/ai-model-status.tsx

@@ -16,11 +16,18 @@ interface ModelInfo {
   role: 'primary' | 'backup' | 'local' | 'agent' | 'provider'
   status: 'up' | 'down' | 'degraded' | 'unknown'
   latencyMs?: number | null
+  diagnosisCode?: string | null
+  retryAfterSeconds?: number | null
+  isCooldown?: boolean
 }
 
 interface HealthComponent {
   status?: 'up' | 'down' | 'degraded'
   latency_ms?: number | null
+  diagnosis_code?: string | null
+  retry_after_seconds?: number | null
+  is_cooldown?: boolean
+  error?: string | null
 }
 
 interface HealthResponse {
@@ -49,6 +56,31 @@ function statusColor(status: ModelInfo['status']) {
   return '#87867f'
 }
 
+function modelDetail(model: ModelInfo, t: ReturnType<typeof useTranslations>) {
+  if (typeof model.latencyMs === 'number' && model.status === 'up') {
+    return `${Math.round(model.latencyMs)}ms`
+  }
+  if (model.isCooldown) {
+    const seconds = Math.max(0, Math.round(model.retryAfterSeconds ?? 0))
+    return seconds > 0
+      ? t('aiModelHealth.cooldownSeconds', { seconds })
+      : t('aiModelHealth.cooldown')
+  }
+  if (model.diagnosisCode === 'local_proxy_upstream_unreachable') {
+    return t('aiModelHealth.localProxy')
+  }
+  if (model.diagnosisCode === 'endpoint_timeout') {
+    return t('aiModelHealth.timeout')
+  }
+  if (model.diagnosisCode === 'endpoint_network_unreachable') {
+    return t('aiModelHealth.network')
+  }
+  if (model.diagnosisCode === 'endpoint_connection_refused') {
+    return t('aiModelHealth.refused')
+  }
+  return t(`aiModelRoles.${model.role}` as never)
+}
+
 export function AIModelStatus() {
   const t = useTranslations('dashboard')
   const [models, setModels] = useState<ModelInfo[]>([
@@ -72,6 +104,9 @@ export function AIModelStatus() {
           role: PROVIDER_ROLES[key] ?? 'provider',
           status: d.components?.[key]?.status ?? 'unknown',
           latencyMs: d.components?.[key]?.latency_ms,
+          diagnosisCode: d.components?.[key]?.diagnosis_code,
+          retryAfterSeconds: d.components?.[key]?.retry_after_seconds,
+          isCooldown: d.components?.[key]?.is_cooldown,
         })))
       })
       .catch(() => {})
@@ -98,9 +133,7 @@ export function AIModelStatus() {
             <span style={{ width: 5, height: 5, borderRadius: '50%', background: statusColor(m.status), flexShrink: 0 }} />
             <span style={{ fontSize: 12, fontWeight: 500, color: '#141413' }}>{m.name}</span>
             <span style={{ fontSize: 10, color: '#87867f', marginLeft: 'auto' }}>
-              {typeof m.latencyMs === 'number'
-                ? `${Math.round(m.latencyMs)}ms`
-                : t(`aiModelRoles.${m.role}` as never)}
+              {modelDetail(m, t)}
             </span>
           </div>
         ))}