feat: support course-specific Qwen endpoints

src/instructor/instructor.service.ts

@@ -118,6 +118,7 @@ export class InstructorService {
       enabled: setting?.enabled ?? false,
       provider: setting?.provider ?? 'OPENAI',
       model: setting?.model ?? 'gpt-4.1-mini',
+      endpointUrl: setting?.provider === 'QWEN' ? setting.endpointUrl : null,
       hasApiKey: Boolean(setting?.encryptedApiKey),
       updatedAt: setting?.updatedAt ?? null,
     };
@@ -138,6 +139,9 @@ export class InstructorService {
     if (input.enabled && !apiKey && (!existing?.encryptedApiKey || existing.provider !== input.provider)) {
       throw new BadRequestException('AI 에이전트를 사용하거나 공급자를 변경하려면 해당 공급자의 API 키를 입력하세요.');
     }
+    const endpointUrl = input.provider === 'QWEN'
+      ? this.normalizeQwenEndpoint(input.endpointUrl)
+      : null;
     const setting = await this.prisma.courseAiSetting.upsert({
       where: { courseId: course.id },
       create: {
@@ -145,12 +149,14 @@ export class InstructorService {
         enabled: input.enabled,
         provider: input.provider,
         model: input.model.trim(),
+        endpointUrl,
         encryptedApiKey: apiKey ? this.aiCredentialService.encrypt(apiKey) : null,
       },
       update: {
         enabled: input.enabled,
         provider: input.provider,
         model: input.model.trim(),
+        ...(input.provider !== 'QWEN' || input.endpointUrl !== undefined ? { endpointUrl } : {}),
         ...(apiKey ? { encryptedApiKey: this.aiCredentialService.encrypt(apiKey) } : {}),
       },
     });
@@ -159,11 +165,27 @@ export class InstructorService {
       enabled: setting.enabled,
       provider: setting.provider,
       model: setting.model,
+      endpointUrl: setting.provider === 'QWEN' ? setting.endpointUrl : null,
       hasApiKey: Boolean(setting.encryptedApiKey),
       updatedAt: setting.updatedAt,
     };
   }
 
+  private normalizeQwenEndpoint(value: string | undefined): string | null {
+    const endpoint = value?.trim();
+    if (!endpoint) return null;
+    let url: URL;
+    try {
+      url = new URL(endpoint);
+    } catch {
+      throw new BadRequestException('Qwen 엔드포인트 주소가 올바르지 않습니다.');
+    }
+    if (url.protocol !== 'https:' || url.username || url.password) {
+      throw new BadRequestException('Qwen 엔드포인트는 인증정보가 없는 HTTPS 주소여야 합니다.');
+    }
+    return endpoint.replace(/\/+$/, '');
+  }
+
   async listCourses(accessToken: string | undefined) {
     const { authUser, instructor } = await this.getInstructor(accessToken);
     const organizationName = authUser.primaryAffiliation?.organizationName?.trim();