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/academy/elevenlabs_client.go

@@ -0,0 +1,105 @@
+package academy
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"time"
+)
+
+// ElevenLabsClient handles text-to-speech via the ElevenLabs API
+type ElevenLabsClient struct {
+	apiKey  string
+	voiceID string
+	client  *http.Client
+}
+
+// NewElevenLabsClient creates a new ElevenLabs client
+func NewElevenLabsClient() *ElevenLabsClient {
+	apiKey := os.Getenv("ELEVENLABS_API_KEY")
+	voiceID := os.Getenv("ELEVENLABS_VOICE_ID")
+	if voiceID == "" {
+		voiceID = "EXAVITQu4vr4xnSDxMaL" // Default: "Sarah" voice
+	}
+
+	return &ElevenLabsClient{
+		apiKey:  apiKey,
+		voiceID: voiceID,
+		client: &http.Client{
+			Timeout: 120 * time.Second,
+		},
+	}
+}
+
+// IsConfigured returns true if API key is set
+func (c *ElevenLabsClient) IsConfigured() bool {
+	return c.apiKey != ""
+}
+
+// TextToSpeechRequest represents the API request
+type TextToSpeechRequest struct {
+	Text          string        `json:"text"`
+	ModelID       string        `json:"model_id"`
+	VoiceSettings VoiceSettings `json:"voice_settings"`
+}
+
+// VoiceSettings controls voice parameters
+type VoiceSettings struct {
+	Stability       float64 `json:"stability"`
+	SimilarityBoost float64 `json:"similarity_boost"`
+	Style           float64 `json:"style"`
+}
+
+// TextToSpeech converts text to speech audio (MP3)
+func (c *ElevenLabsClient) TextToSpeech(text string) ([]byte, error) {
+	if !c.IsConfigured() {
+		return nil, fmt.Errorf("ElevenLabs API key not configured")
+	}
+
+	url := fmt.Sprintf("https://api.elevenlabs.io/v1/text-to-speech/%s", c.voiceID)
+
+	reqBody := TextToSpeechRequest{
+		Text:    text,
+		ModelID: "eleven_multilingual_v2",
+		VoiceSettings: VoiceSettings{
+			Stability:       0.5,
+			SimilarityBoost: 0.75,
+			Style:           0.5,
+		},
+	}
+
+	jsonBody, err := json.Marshal(reqBody)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal request: %w", err)
+	}
+
+	req, err := http.NewRequest("POST", url, bytes.NewReader(jsonBody))
+	if err != nil {
+		return nil, fmt.Errorf("failed to create request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("xi-api-key", c.apiKey)
+	req.Header.Set("Accept", "audio/mpeg")
+
+	resp, err := c.client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("ElevenLabs API request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		body, _ := io.ReadAll(resp.Body)
+		return nil, fmt.Errorf("ElevenLabs API error %d: %s", resp.StatusCode, string(body))
+	}
+
+	audioData, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read audio response: %w", err)
+	}
+
+	return audioData, nil
+}