feat(ai-admin-console): complete implementation and resolve lint compilation errors

frontend/lib/api/client.ts

@@ -107,13 +107,21 @@ export interface ApiErrorResponse {
   error: ApiErrorPayload;
 }
 
+export const AI_FEATURES_UNAVAILABLE_EVENT = 'ai-features-unavailable';
+
 // แปลง Axios error เป็น Structured Error Response (ADR-007)
 export function parseApiError(axiosError: AxiosError): ApiErrorResponse {
   if (axiosError.response?.data) {
     const data = axiosError.response.data;
     // กรณีที่ backend ส่ง { error: { ... } } ตาม ADR-007
     if (typeof data === 'object' && data !== null && 'error' in data) {
-      return data as ApiErrorResponse;
+      const parsed = data as ApiErrorResponse;
+      return {
+        error: {
+          ...parsed.error,
+          statusCode: axiosError.response.status,
+        },
+      };
     }
     // กรณี NestJS validation error { message: [...], statusCode: 400 }
     if (typeof data === 'object' && data !== null && 'message' in data) {
@@ -181,6 +189,17 @@ apiClient.interceptors.response.use(
     }
     // แปลง error เป็น structured format ตาม ADR-007 ก่อน reject
     const structuredError = parseApiError(error);
+    if (
+      structuredError.error.statusCode === 503 &&
+      structuredError.error.code === 'AI_FEATURES_UNAVAILABLE' &&
+      typeof window !== 'undefined'
+    ) {
+      window.dispatchEvent(
+        new CustomEvent(AI_FEATURES_UNAVAILABLE_EVENT, {
+          detail: structuredError.error,
+        })
+      );
+    }
     return Promise.reject(structuredError);
   }
 );

frontend/lib/services/admin-ai.service.ts

@@ -0,0 +1,113 @@
+// File: lib/services/admin-ai.service.ts
+// Change Log
+// - 2026-05-21: เพิ่ม service สำหรับ AI Admin Console toggle API.
+// - 2026-05-21: เพิ่ม service method `getHealth` สำหรับดึงข้อมูลสุขภาพของระบบ AI (T028).
+// - 2026-05-21: เพิ่ม API service สำหรับ Superadmin Sandbox RAG (T037).
+// - 2026-05-21: เพิ่ม service method `submitSandboxExtract` สำหรับอัปโหลดไฟล์ใน OCR Sandbox (T043).
+
+import api from '../api/client';
+
+export interface AiAdminSettings {
+  aiFeaturesEnabled: boolean;
+}
+
+export interface QueueMetrics {
+  active?: number;
+  waiting?: number;
+  failed?: number;
+  completed?: number;
+  isPaused?: boolean;
+  error?: string;
+}
+
+export interface AiSystemHealth {
+  ollama: {
+    status: 'HEALTHY' | 'DEGRADED' | 'DOWN';
+    latencyMs: number;
+    models: string[];
+    error?: string;
+  };
+  qdrant: {
+    status: 'HEALTHY' | 'DEGRADED' | 'DOWN';
+    latencyMs: number;
+    collections?: string[];
+    error?: string;
+  };
+  queues: {
+    realtime: QueueMetrics;
+    batch: QueueMetrics;
+  };
+  timestamp: string;
+}
+
+export interface AiRagCitation {
+  pointId: string | number;
+  score: number;
+  docType?: string;
+  docNumber?: string;
+  snippet?: string;
+}
+
+export interface AiSandboxJobResult {
+  requestPublicId: string;
+  status: 'pending' | 'processing' | 'completed' | 'failed' | 'cancelled' | 'not_found';
+  answer?: string;
+  citations?: AiRagCitation[];
+  confidence?: number;
+  usedFallbackModel?: boolean;
+  errorMessage?: string;
+  completedAt?: string;
+}
+
+const extractData = <T>(value: unknown): T => {
+  if (value && typeof value === 'object' && 'data' in value) {
+    return (value as { data: T }).data;
+  }
+  return value as T;
+};
+
+/** Service สำหรับเรียก AI Admin Console API ผ่าน DMS Backend เท่านั้น */
+export const adminAiService = {
+  getStatus: async (): Promise<AiAdminSettings> => {
+    const { data } = await api.get('/ai/status');
+    return extractData<AiAdminSettings>(data);
+  },
+  getSettings: async (): Promise<AiAdminSettings> => {
+    const { data } = await api.get('/ai/admin/settings');
+    return extractData<AiAdminSettings>(data);
+  },
+  toggleFeatures: async (enabled: boolean): Promise<AiAdminSettings> => {
+    const { data } = await api.post('/ai/admin/toggle', { enabled });
+    return extractData<AiAdminSettings>(data);
+  },
+  getHealth: async (): Promise<AiSystemHealth> => {
+    const { data } = await api.get('/ai/admin/health');
+    return extractData<AiSystemHealth>(data);
+  },
+  submitSandboxRag: async (
+    projectPublicId: string,
+    question: string
+  ): Promise<{ requestPublicId: string; jobId: string; status: string }> => {
+    const { data } = await api.post('/ai/admin/sandbox/rag', {
+      projectPublicId,
+      question,
+    });
+    return extractData<{ requestPublicId: string; jobId: string; status: string }>(data);
+  },
+  getSandboxJobStatus: async (id: string): Promise<AiSandboxJobResult> => {
+    const { data } = await api.get(`/ai/admin/sandbox/job/${id}`);
+    return extractData<AiSandboxJobResult>(data);
+  },
+  submitSandboxExtract: async (
+    file: File
+  ): Promise<{ requestPublicId: string; jobId: string; status: string }> => {
+    const formData = new FormData();
+    formData.append('file', file);
+    const { data } = await api.post('/ai/admin/sandbox/extract', formData, {
+      headers: {
+        'Content-Type': 'multipart/form-data',
+      },
+    });
+    return extractData<{ requestPublicId: string; jobId: string; status: string }>(data);
+  },
+};