feat(azure-ai+gpu-ui): per-tenant Azure AI config + GPU health panel

- Per-tenant Azure AI config stored in tenants.tenant_config JSONB
- GET/PUT /api/tenants/{id}/ai-config + POST .../test connection
- api_key never returned to frontend (has_api_key: bool pattern)
- azure_ai.py resolves creds from tenant config when ai_enabled=True
- ai_tasks.py loads tenant config and passes it to validate_thumbnail
- Admin GPU Status section: probe button + status badge + last-checked time
- Notifications: _BELL_CHANNELS filter (notification+alert only in bell)
- Tenants.tsx: per-row Azure AI Config modal with URL auto-parse helper
- Remove duplicate in-memory /gpu-probe endpoints (kept DB-backed /probe/gpu)

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

frontend/src/api/tenants.ts

@@ -21,6 +21,28 @@ export interface TenantUpdate {
   is_active?: boolean
 }
 
+export interface TenantAIConfig {
+  ai_enabled: boolean
+  ai_endpoint: string | null
+  ai_deployment: string
+  ai_api_version: string
+  has_api_key: boolean
+  ai_max_tokens: number
+  ai_temperature: number
+  ai_validation_prompt: string | null
+}
+
+export interface TenantAIConfigUpdate {
+  ai_enabled: boolean
+  ai_endpoint?: string | null
+  ai_deployment?: string
+  ai_api_version?: string
+  ai_api_key?: string | null
+  ai_max_tokens?: number
+  ai_temperature?: number
+  ai_validation_prompt?: string | null
+}
+
 export async function getTenants(): Promise<Tenant[]> {
   const res = await api.get<Tenant[]>('/tenants/')
   return res.data
@@ -44,3 +66,25 @@ export async function updateTenant(id: string, data: TenantUpdate): Promise<Tena
 export async function deleteTenant(id: string): Promise<void> {
   await api.delete(`/tenants/${id}`)
 }
+
+export async function getTenantAIConfig(tenantId: string): Promise<TenantAIConfig> {
+  const res = await api.get<TenantAIConfig>(`/tenants/${tenantId}/ai-config`)
+  return res.data
+}
+
+export async function updateTenantAIConfig(
+  tenantId: string,
+  config: TenantAIConfigUpdate,
+): Promise<TenantAIConfig> {
+  const res = await api.put<TenantAIConfig>(`/tenants/${tenantId}/ai-config`, config)
+  return res.data
+}
+
+export async function testTenantAIConfig(
+  tenantId: string,
+): Promise<{ ok: boolean; error?: string }> {
+  const res = await api.post<{ ok: boolean; error?: string }>(
+    `/tenants/${tenantId}/ai-config/test`,
+  )
+  return res.data
+}

frontend/src/api/worker.ts

@@ -197,3 +197,24 @@ export async function updateWorkerConfig(
   const res = await api.put<WorkerConfig>(`/worker/configs/${queueName}`, update)
   return res.data
 }
+
+// ---------------------------------------------------------------------------
+// GPU probe
+// ---------------------------------------------------------------------------
+
+export interface GPUProbeResult {
+  status: 'ok' | 'failed' | 'error' | 'unknown'
+  device_type?: string | null
+  error?: string | null
+  probed_at?: string | null
+}
+
+export async function getGpuProbeResult(): Promise<GPUProbeResult> {
+  const res = await api.get<GPUProbeResult>('/worker/gpu-probe')
+  return res.data
+}
+
+export async function triggerGpuProbe(): Promise<{ task_id: string; queued: boolean }> {
+  const res = await api.post<{ task_id: string; queued: boolean }>('/worker/gpu-probe')
+  return res.data
+}