feat(mobile): AI question generation panel in supervisor exam editor

Hints input + preset chips + count picker; generated questions land in
the existing editor blocks for the supervisor to review before publish.

mobile-uni/src/services/exam.ts

@@ -1,4 +1,4 @@
-import type { ExamDetail, ExamResultItem, ExamSubmitResult, ExamSummary, SupervisorExamDraft } from '@/types/api';
+import type { ExamDetail, ExamQuestion, ExamResultItem, ExamSubmitResult, ExamSummary, SupervisorExamDraft } from '@/types/api';
 import { apiRequest } from './api';
 
 type RawExamQuestion = {
@@ -149,3 +149,35 @@ export const getSupervisorExamResults = (id: number) =>
     method: 'GET',
     timeout: 15000
   });
+
+
+type RawAiGenerateResponse = {
+  questions: RawExamQuestion[];
+  groundedFragments?: number;
+};
+
+export const generateSupervisorExamQuestions = async (data: {
+  positionCode: string;
+  hints: string;
+  count: number;
+  formats: string[];
+}): Promise<{ questions: ExamQuestion[]; groundedFragments: number }> => {
+  const response = await apiRequest<RawAiGenerateResponse>({
+    url: '/api/aihr/mobile/exams/supervisor/ai-generate',
+    method: 'POST',
+    data,
+    timeout: 60000
+  });
+  return {
+    groundedFragments: response.groundedFragments || 0,
+    questions: (response.questions || []).map((question, index) => ({
+      id: Date.now() + index,
+      format: question.questionType,
+      stem: question.stem,
+      options: question.options || [],
+      score: question.score,
+      answer: question.questionType === 'multiple' ? (question.correctAnswers || []) : (question.correctAnswers?.[0] || ''),
+      explanation: question.explanation || ''
+    }))
+  };
+};