Fix scan qui échoue

backend/src/api/routes/library.py

@@ -97,7 +97,40 @@ def scan_library_task(directory: str, db: Session):
                 ).first()
 
                 if existing:
-                    logger.info(f"Already in database, skipping: {file_path.name}")
+                    # Check if needs transcoding/waveform
+                    needs_update = False
+
+                    if not existing.stream_filepath or not Path(existing.stream_filepath).exists():
+                        logger.info(f"  → Needs transcoding: {file_path.name}")
+                        needs_update = True
+
+                        # Transcode to MP3 128kbps
+                        stream_path = transcoder.transcode_to_mp3(
+                            str(file_path),
+                            bitrate="128k",
+                            overwrite=False
+                        )
+                        if stream_path:
+                            existing.stream_filepath = stream_path
+
+                    if not existing.waveform_filepath or not Path(existing.waveform_filepath).exists():
+                        logger.info(f"  → Needs waveform: {file_path.name}")
+                        needs_update = True
+
+                        # Pre-compute waveform
+                        waveform_dir = file_path.parent / "waveforms"
+                        waveform_dir.mkdir(parents=True, exist_ok=True)
+                        waveform_path = waveform_dir / f"{file_path.stem}.waveform.json"
+
+                        if save_waveform_to_file(str(file_path), str(waveform_path), num_peaks=800):
+                            existing.waveform_filepath = str(waveform_path)
+
+                    if needs_update:
+                        db.commit()
+                        logger.info(f"✓ Updated: {file_path.name}")
+                    else:
+                        logger.info(f"Already complete, skipping: {file_path.name}")
+
                     scan_status["processed"] += 1
                     continue
 
@@ -211,7 +244,7 @@ async def scan_library(
         )
 
     # Use default music directory if not provided
-    scan_dir = directory if directory else "/music"
+    scan_dir = directory if directory else "/audio"
 
     if not Path(scan_dir).exists():
         raise HTTPException(