feat: Implement Compliance Academy E-Learning module (Phases 1-7)

Add complete Academy backend (Go) and frontend (Next.js) for DSGVO/IT-Security/AI-Literacy compliance training:
- Go backend: Course CRUD, enrollments, quiz evaluation, PDF certificates (gofpdf), video generation pipeline (ElevenLabs + HeyGen)
- In-memory data store with PostgreSQL migration for future DB support
- Frontend: Course creation (AI + manual), lesson viewer, interactive quiz, certificate viewer with PDF download
- Fix existing compile errors in generate.go (SearchResult type mismatch), llm/service.go (unused var), rag/service.go (Unicode chars)

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

admin-v2/ai-compliance-sdk/internal/api/academy_models.go

@@ -0,0 +1,209 @@
+package api
+
+// Academy Course models
+
+// AcademyCourse represents a training course in the Academy module
+type AcademyCourse struct {
+	ID               string          `json:"id"`
+	TenantID         string          `json:"tenantId,omitempty"`
+	Title            string          `json:"title"`
+	Description      string          `json:"description"`
+	Category         string          `json:"category"`
+	PassingScore     int             `json:"passingScore"`
+	DurationMinutes  int             `json:"durationMinutes"`
+	RequiredForRoles []string        `json:"requiredForRoles"`
+	Status           string          `json:"status"`
+	Lessons          []AcademyLesson `json:"lessons"`
+	CreatedAt        string          `json:"createdAt"`
+	UpdatedAt        string          `json:"updatedAt"`
+}
+
+// AcademyLesson represents a single lesson within a course
+type AcademyLesson struct {
+	ID              string                `json:"id"`
+	CourseID        string                `json:"courseId"`
+	Title           string                `json:"title"`
+	Type            string                `json:"type"` // video, text, quiz
+	ContentMarkdown string                `json:"contentMarkdown"`
+	VideoURL        string                `json:"videoUrl,omitempty"`
+	AudioURL        string                `json:"audioUrl,omitempty"`
+	Order           int                   `json:"order"`
+	DurationMinutes int                   `json:"durationMinutes"`
+	QuizQuestions   []AcademyQuizQuestion `json:"quizQuestions,omitempty"`
+}
+
+// AcademyQuizQuestion represents a single quiz question within a lesson
+type AcademyQuizQuestion struct {
+	ID                 string   `json:"id"`
+	LessonID           string   `json:"lessonId"`
+	Question           string   `json:"question"`
+	Options            []string `json:"options"`
+	CorrectOptionIndex int      `json:"correctOptionIndex"`
+	Explanation        string   `json:"explanation"`
+	Order              int      `json:"order"`
+}
+
+// AcademyEnrollment represents a user's enrollment in a course
+type AcademyEnrollment struct {
+	ID            string `json:"id"`
+	TenantID      string `json:"tenantId,omitempty"`
+	CourseID      string `json:"courseId"`
+	UserID        string `json:"userId"`
+	UserName      string `json:"userName"`
+	UserEmail     string `json:"userEmail"`
+	Status        string `json:"status"` // not_started, in_progress, completed, expired
+	Progress      int    `json:"progress"` // 0-100
+	StartedAt     string `json:"startedAt"`
+	CompletedAt   string `json:"completedAt,omitempty"`
+	CertificateID string `json:"certificateId,omitempty"`
+	Deadline      string `json:"deadline"`
+	CreatedAt     string `json:"createdAt,omitempty"`
+	UpdatedAt     string `json:"updatedAt,omitempty"`
+}
+
+// AcademyCertificate represents a certificate issued upon course completion
+type AcademyCertificate struct {
+	ID           string `json:"id"`
+	TenantID     string `json:"tenantId,omitempty"`
+	EnrollmentID string `json:"enrollmentId"`
+	CourseID     string `json:"courseId"`
+	UserID       string `json:"userId"`
+	UserName     string `json:"userName"`
+	CourseName   string `json:"courseName"`
+	Score        int    `json:"score"`
+	IssuedAt     string `json:"issuedAt"`
+	ValidUntil   string `json:"validUntil"`
+	PdfURL       string `json:"pdfUrl,omitempty"`
+}
+
+// AcademyLessonProgress tracks a user's progress through a single lesson
+type AcademyLessonProgress struct {
+	ID           string `json:"id"`
+	EnrollmentID string `json:"enrollmentId"`
+	LessonID     string `json:"lessonId"`
+	Completed    bool   `json:"completed"`
+	QuizScore    *int   `json:"quizScore,omitempty"`
+	CompletedAt  string `json:"completedAt,omitempty"`
+}
+
+// AcademyStatistics provides aggregate statistics for the Academy module
+type AcademyStatistics struct {
+	TotalCourses     int            `json:"totalCourses"`
+	TotalEnrollments int            `json:"totalEnrollments"`
+	CompletionRate   int            `json:"completionRate"`
+	OverdueCount     int            `json:"overdueCount"`
+	ByCategory       map[string]int `json:"byCategory"`
+	ByStatus         map[string]int `json:"byStatus"`
+}
+
+// Request types
+
+// CreateCourseRequest is the request body for creating a new course
+type CreateCourseRequest struct {
+	TenantID         string                `json:"tenantId" binding:"required"`
+	Title            string                `json:"title" binding:"required"`
+	Description      string                `json:"description"`
+	Category         string                `json:"category" binding:"required"`
+	DurationMinutes  int                   `json:"durationMinutes"`
+	RequiredForRoles []string              `json:"requiredForRoles"`
+	PassingScore     int                   `json:"passingScore"`
+	Lessons          []CreateLessonRequest `json:"lessons"`
+}
+
+// CreateLessonRequest is the request body for creating a lesson within a course
+type CreateLessonRequest struct {
+	Title           string                      `json:"title" binding:"required"`
+	Type            string                      `json:"type" binding:"required"`
+	ContentMarkdown string                      `json:"contentMarkdown"`
+	VideoURL        string                      `json:"videoUrl"`
+	Order           int                         `json:"order"`
+	DurationMinutes int                         `json:"durationMinutes"`
+	QuizQuestions   []CreateQuizQuestionRequest `json:"quizQuestions"`
+}
+
+// CreateQuizQuestionRequest is the request body for creating a quiz question
+type CreateQuizQuestionRequest struct {
+	Question           string   `json:"question" binding:"required"`
+	Options            []string `json:"options" binding:"required"`
+	CorrectOptionIndex int      `json:"correctOptionIndex"`
+	Explanation        string   `json:"explanation"`
+	Order              int      `json:"order"`
+}
+
+// UpdateCourseRequest is the request body for updating an existing course
+type UpdateCourseRequest struct {
+	Title            *string  `json:"title"`
+	Description      *string  `json:"description"`
+	Category         *string  `json:"category"`
+	DurationMinutes  *int     `json:"durationMinutes"`
+	RequiredForRoles []string `json:"requiredForRoles"`
+	PassingScore     *int     `json:"passingScore"`
+}
+
+// EnrollUserRequest is the request body for enrolling a user in a course
+type EnrollUserRequest struct {
+	TenantID  string `json:"tenantId" binding:"required"`
+	CourseID  string `json:"courseId" binding:"required"`
+	UserID    string `json:"userId" binding:"required"`
+	UserName  string `json:"userName" binding:"required"`
+	UserEmail string `json:"userEmail" binding:"required"`
+	Deadline  string `json:"deadline" binding:"required"`
+}
+
+// UpdateProgressRequest is the request body for updating enrollment progress
+type UpdateProgressRequest struct {
+	Progress int    `json:"progress"`
+	LessonID string `json:"lessonId"`
+}
+
+// SubmitQuizRequest is the request body for submitting quiz answers
+type SubmitQuizRequest struct {
+	Answers []int `json:"answers" binding:"required"`
+}
+
+// SubmitQuizResponse is the response for a quiz submission
+type SubmitQuizResponse struct {
+	Score          int                `json:"score"`
+	Passed         bool               `json:"passed"`
+	CorrectAnswers int                `json:"correctAnswers"`
+	TotalQuestions int                `json:"totalQuestions"`
+	Results        []QuizQuestionResult `json:"results"`
+}
+
+// QuizQuestionResult represents the result of a single quiz question
+type QuizQuestionResult struct {
+	QuestionID  string `json:"questionId"`
+	Correct     bool   `json:"correct"`
+	Explanation string `json:"explanation"`
+}
+
+// GenerateCourseRequest is the request body for AI-generating a course
+type GenerateCourseRequest struct {
+	TenantID    string `json:"tenantId" binding:"required"`
+	Topic       string `json:"topic" binding:"required"`
+	Category    string `json:"category" binding:"required"`
+	TargetGroup string `json:"targetGroup"`
+	Language    string `json:"language"`
+	UseRAG      bool   `json:"useRag"`
+	RAGQuery    string `json:"ragQuery"`
+}
+
+// GenerateVideosRequest is the request body for generating lesson videos
+type GenerateVideosRequest struct {
+	TenantID string `json:"tenantId" binding:"required"`
+}
+
+// VideoStatusResponse represents the video generation status for a course
+type VideoStatusResponse struct {
+	CourseID string              `json:"courseId"`
+	Status   string              `json:"status"` // pending, processing, completed, failed
+	Lessons  []LessonVideoStatus `json:"lessons"`
+}
+
+// LessonVideoStatus represents the video generation status for a single lesson
+type LessonVideoStatus struct {
+	LessonID string `json:"lessonId"`
+	Status   string `json:"status"`
+	VideoURL string `json:"videoUrl,omitempty"`
+	AudioURL string `json:"audioUrl,omitempty"`
+}