feat: improve student practice experience

apps/taro/src/services/learning.ts

@@ -14,11 +14,13 @@ export interface QuestionItem {
   content?: string;
   type?: string;
   typeLabel?: string;
+  mediaUrl?: string | null;
   options?: QuestionOption[] | string[] | null;
   answerText?: string | null;
   correctOptionIndex?: number | null;
   correctOptionIndices?: number[] | null;
   explanation?: string | null;
+  subQuestions?: Record<string, unknown>[] | null;
   hasVideoExplanation?: boolean;
   wrongCount?: number;
   lastWrongAt?: string | null;
@@ -41,6 +43,10 @@ export interface AnswerResult {
   id: string;
   questionId: string;
   isCorrect: boolean | null;
+  selectedOptions?: string[];
+  answerText?: string | null;
+  answeredAt?: string;
+  selfJudged?: boolean;
 }
 
 export interface PracticeReport {
@@ -128,6 +134,7 @@ export async function submitAnswer(body: {
   questionId: string;
   selectedOptions?: string[];
   answerText?: string;
+  selfJudgedCorrect?: boolean;
 }) {
   return apiRequest<{ item: AnswerResult }>('/api/learning/answers', {
     method: 'POST',