feat: ElevenLabs-Voice-Liste + Fehlerdetails in Audio-Batch-Ergebnissen

- GET /api/tts-settings/voices/available listet die Account-Stimmen
  (Grundlage für Voice-Auswahl im CMT statt Freitext-IDs)
- Audio-Batch/-Fill-Fehler enthalten jetzt das ElevenLabs-Detail
  (z.B. voice_not_found) statt nur 'ElevenLabs error'

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/lib/pipeline.js

@@ -5,7 +5,7 @@ const { query } = require('../db');
 const { LANGS, fillMissingRow } = require('./translate');
 const { translateWordGroup } = require('./pairContent');
 const { generatePairsForObject, persistPair } = require('./generatePairs');
-const { generateAndStore } = require('../routes/audios');
+const { generateAndStore, describeError } = require('../routes/audios');
 
 const queue = [];
 let running = false;
@@ -167,7 +167,7 @@ async function runPicture(pictureId) {
         await generateWithBackoff(u);
         progress.audiosDone++;
       } catch (err) {
-        failures.push(`${u.source_table}/${u.source_field}/${u.language}: ${err.message}`);
+        failures.push(`${u.source_table}/${u.source_field}/${u.language}: ${describeError(err)}`);
       }
       await setStep(pictureId, 'audio', progress);
     }

src/routes/audios.js

@@ -99,6 +99,12 @@ async function generateAndStore({ text, voice_id, language, model_id, speed, sta
   return result.rows[0];
 }
 
+// Fehlertext inkl. ElevenLabs-Detail (z.B. voice_not_found) — sonst geht die
+// eigentliche Ursache in Batch-Ergebnissen als generisches 'ElevenLabs error' unter.
+function describeError(err) {
+  return err.detail ? `${err.message}: ${String(err.detail).slice(0, 300)}` : err.message;
+}
+
 // ── Fehlende/vorhandene Audio-Einheiten für einen Filter berechnen ───────────
 // Regel: Eine Quell-Zeile+Feld gilt erst dann als vertonbar, wenn ALLE drei Sprachen Text haben.
 // Wenn nur eine Sprache angefragt ist (Filter), wird trotzdem auf Vollständigkeit aller Sprachen geprüft.
@@ -265,7 +271,7 @@ router.post('/generate-batch', async (req, res, next) => {
         results.generated++;
       } catch (err) {
         results.failed++;
-        results.errors.push({ source_id: u.source_id, field: u.source_field, lang: u.language, error: err.message });
+        results.errors.push({ source_id: u.source_id, field: u.source_field, lang: u.language, error: describeError(err) });
       }
     }
     res.json(results);
@@ -318,3 +324,4 @@ router.delete('/:id', async (req, res, next) => {
 module.exports = router;
 // Für lib/pipeline.js (Audio-Generierung außerhalb des HTTP-Kontexts)
 module.exports.generateAndStore = generateAndStore;
+module.exports.describeError = describeError;

src/routes/pipeline.js

@@ -4,6 +4,7 @@ const { query } = require('../db');
 const { LANGS } = require('../lib/translate');
 const { loadPairContext, computeReadiness, loadPairContent } = require('../lib/pairContent');
 const { enqueue, loadPairs, collectAudioUnits, generateWithBackoff, translatePair } = require('../lib/pipeline');
+const { describeError } = require('./audios');
 const { PLACEHOLDER_RE } = require('../lib/placeholders');
 
 // ── Objekt-Wort-Erkennung in Sätzen (für die manuelle Zuweisung beim Review) ──
@@ -233,7 +234,7 @@ router.post('/picture/:id/audio-fill', async (req, res, next) => {
       try { await generateWithBackoff(u); result.generated++; }
       catch (err) {
         result.failed++;
-        result.errors.push({ source: `${u.source_table}/${u.source_field}/${u.language}`, error: err.message });
+        result.errors.push({ source: `${u.source_table}/${u.source_field}/${u.language}`, error: describeError(err) });
       }
     }
     res.json(result);

src/routes/tts-settings.js

@@ -3,6 +3,21 @@ const { query } = require('../db');
 
 const EDITABLE = ['voice_id', 'model_id', 'speed', 'stability', 'similarity_boost', 'style'];
 
+// GET /api/tts-settings/voices/available — Stimmen des ElevenLabs-Accounts.
+// Muss vor GET /:language registriert sein, sonst matcht ':language' den Pfad.
+router.get('/voices/available', async (req, res, next) => {
+  try {
+    const apiKey = process.env.ELEVENLABS_API_KEY;
+    if (!apiKey) return res.status(500).json({ error: 'ELEVENLABS_API_KEY not configured' });
+    const r = await fetch('https://api.elevenlabs.io/v1/voices', { headers: { 'xi-api-key': apiKey } });
+    if (!r.ok) return res.status(r.status).json({ error: 'ElevenLabs error', detail: await r.text() });
+    const data = await r.json();
+    res.json((data.voices || []).map(v => ({
+      voice_id: v.voice_id, name: v.name, labels: v.labels || {}, preview_url: v.preview_url || null,
+    })));
+  } catch (err) { next(err); }
+});
+
 // GET /api/tts-settings
 router.get('/', async (req, res, next) => {
   try {