Add lesson content editor, quiz test endpoint, and lesson update API

- Backend: UpdateLesson handler (PUT /lessons/:id) for editing title, content, quiz questions
- Backend: TestQuiz handler (POST /lessons/:id/quiz-test) for quiz evaluation without enrollment
- Frontend: Content editor with markdown textarea, save, and approve-for-video workflow
- Frontend: Fix quiz endpoint to /lessons/:id/quiz-test

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

ai-compliance-sdk/internal/api/handlers/academy_handlers.go

@@ -572,6 +572,131 @@ func (h *AcademyHandlers) SubmitQuiz(c *gin.Context) {
 	c.JSON(http.StatusOK, response)
 }
 
+// ============================================================================
+// Lesson Update
+// ============================================================================
+
+// UpdateLesson updates a lesson's content, title, or quiz questions
+// PUT /sdk/v1/academy/lessons/:id
+func (h *AcademyHandlers) UpdateLesson(c *gin.Context) {
+	lessonID, err := uuid.Parse(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid lesson ID"})
+		return
+	}
+
+	lesson, err := h.store.GetLesson(c.Request.Context(), lessonID)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	if lesson == nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "lesson not found"})
+		return
+	}
+
+	var req struct {
+		Title           *string               `json:"title"`
+		Description     *string               `json:"description"`
+		ContentURL      *string               `json:"content_url"`
+		DurationMinutes *int                  `json:"duration_minutes"`
+		QuizQuestions   *[]academy.QuizQuestion `json:"quiz_questions"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	if req.Title != nil {
+		lesson.Title = *req.Title
+	}
+	if req.Description != nil {
+		lesson.Description = *req.Description
+	}
+	if req.ContentURL != nil {
+		lesson.ContentURL = *req.ContentURL
+	}
+	if req.DurationMinutes != nil {
+		lesson.DurationMinutes = *req.DurationMinutes
+	}
+	if req.QuizQuestions != nil {
+		lesson.QuizQuestions = *req.QuizQuestions
+	}
+
+	if err := h.store.UpdateLesson(c.Request.Context(), lesson); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"lesson": lesson})
+}
+
+// TestQuiz evaluates quiz answers without requiring an enrollment
+// POST /sdk/v1/academy/lessons/:id/quiz-test
+func (h *AcademyHandlers) TestQuiz(c *gin.Context) {
+	lessonID, err := uuid.Parse(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid lesson ID"})
+		return
+	}
+
+	lesson, err := h.store.GetLesson(c.Request.Context(), lessonID)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	if lesson == nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "lesson not found"})
+		return
+	}
+
+	if len(lesson.QuizQuestions) == 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "lesson has no quiz questions"})
+		return
+	}
+
+	var req struct {
+		Answers []int `json:"answers"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	if len(req.Answers) != len(lesson.QuizQuestions) {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "number of answers must match number of questions"})
+		return
+	}
+
+	correctCount := 0
+	var results []academy.QuizResult
+	for i, question := range lesson.QuizQuestions {
+		correct := req.Answers[i] == question.CorrectIndex
+		if correct {
+			correctCount++
+		}
+		results = append(results, academy.QuizResult{
+			Question:    question.Question,
+			Correct:     correct,
+			Explanation: question.Explanation,
+		})
+	}
+
+	totalQuestions := len(lesson.QuizQuestions)
+	score := 0
+	if totalQuestions > 0 {
+		score = (correctCount * 100) / totalQuestions
+	}
+
+	c.JSON(http.StatusOK, academy.SubmitQuizResponse{
+		Score:          score,
+		Passed:         score >= 70,
+		CorrectAnswers: correctCount,
+		TotalQuestions: totalQuestions,
+		Results:        results,
+	})
+}
+
 // ============================================================================
 // Statistics
 // ============================================================================