diff --git a/backend/ml/predict_detector_model.py b/backend/ml/predict_detector_model.py
index cd10318..96b9e4e 100644
--- a/backend/ml/predict_detector_model.py
+++ b/backend/ml/predict_detector_model.py
@@ -6,6 +6,7 @@ from pathlib import Path
 
 from PIL import Image
 from ultralytics import YOLO
+import torch
 
 
 def clamp01(v):
@@ -18,6 +19,7 @@ def main():
     parser.add_argument("--image", required=True)
     parser.add_argument("--conf", type=float, default=0.30)
     parser.add_argument("--imgsz", type=int, default=640)
+    parser.add_argument("--debug-image", action="store_true")
     args = parser.parse_args()
 
     root = Path(args.root)
@@ -28,33 +30,52 @@ def main():
         print(json.dumps({
             "available": False,
             "source": "detector_missing",
+            "modelPath": str(model_path),
             "boxes": [],
-        }))
+        }, ensure_ascii=False))
         return
 
     img = Image.open(image_path).convert("RGB")
     img_w, img_h = img.size
 
-    model = YOLO(str(model_path))
+    try:
+        model = YOLO(str(model_path))
+    except Exception as e:
+        print(json.dumps({
+            "available": False,
+            "source": "detector_load_failed",
+            "modelPath": str(model_path),
+            "error": repr(e),
+            "boxes": [],
+        }, ensure_ascii=False))
+        return
+
+    device = 0 if torch.cuda.is_available() else "cpu"
+
     results = model.predict(
         source=str(image_path),
-        conf=args.conf,
-        imgsz=args.imgsz,
+        conf=float(args.conf),
+        imgsz=int(args.imgsz),
         verbose=False,
-        device=0 if __import__("torch").cuda.is_available() else "cpu",
+        device=device,
     )
 
     boxes = []
+    model_names = {}
+
+    raw_box_count = 0
 
     if results:
         r = results[0]
-        names = r.names or {}
+        model_names = {str(k): str(v) for k, v in (r.names or {}).items()}
 
         if r.boxes is not None:
+            raw_box_count = len(r.boxes)
+
             for b in r.boxes:
                 cls_id = int(b.cls[0].item())
                 score = float(b.conf[0].item())
-                label = str(names.get(cls_id, cls_id))
+                label = str((r.names or {}).get(cls_id, cls_id))
 
                 x1, y1, x2, y2 = [float(v) for v in b.xyxy[0].tolist()]
 
@@ -75,9 +96,25 @@ def main():
                     "h": h,
                 })
 
+        if args.debug_image:
+            debug_dir = root / "detector" / "debug"
+            debug_dir.mkdir(parents=True, exist_ok=True)
+            out_path = debug_dir / f"{image_path.stem}_conf_{args.conf}.jpg"
+            plotted = r.plot()
+            Image.fromarray(plotted).save(out_path)
+
     print(json.dumps({
         "available": True,
         "source": "yolo_detector",
+        "modelPath": str(model_path),
+        "image": str(image_path),
+        "conf": float(args.conf),
+        "imgsz": int(args.imgsz),
+        "device": str(device),
+        "imageWidth": img_w,
+        "imageHeight": img_h,
+        "classNames": model_names,
+        "rawBoxCount": raw_box_count,
         "boxes": boxes,
     }, ensure_ascii=False))
 
diff --git a/backend/ml/predict_scene_model.py b/backend/ml/predict_scene_model.py
index 87b39a4..3e0ec2d 100644
--- a/backend/ml/predict_scene_model.py
+++ b/backend/ml/predict_scene_model.py
@@ -158,45 +158,10 @@ def main():
         "bodyPartsPresent": weighted_multilabel(top_targets, "bodyPartsPresent", weights),
         "objectsPresent": weighted_multilabel(top_targets, "objectsPresent", weights),
         "clothingPresent": weighted_multilabel(top_targets, "clothingPresent", weights),
-        "boxes": predict_boxes(root, image_path),
+        "boxes": [],
     }
 
     print(json.dumps(pred, ensure_ascii=False))
 
-def predict_boxes(root: Path, image_path: Path):
-    candidates = [
-        Path(__file__).parent / "predict_detector_model.py",
-        Path.cwd() / "backend" / "ml" / "predict_detector_model.py",
-        Path.cwd() / "ml" / "predict_detector_model.py",
-    ]
-
-    script = next((p for p in candidates if p.exists()), None)
-    if script is None:
-        return []
-
-    try:
-        proc = subprocess.run(
-            [
-                sys.executable,
-                str(script),
-                "--root",
-                str(root),
-                "--image",
-                str(image_path),
-            ],
-            capture_output=True,
-            text=True,
-            timeout=60,
-        )
-
-        if proc.returncode != 0:
-            return []
-
-        data = json.loads(proc.stdout or "{}")
-        return data.get("boxes") or []
-    except Exception:
-        return []
-
-
 if __name__ == "__main__":
     main()
\ No newline at end of file
diff --git a/backend/training.go b/backend/training.go
index 7357b5d..dc3dc8d 100644
--- a/backend/training.go
+++ b/backend/training.go
@@ -56,7 +56,7 @@ type TrainingPrediction struct {
 	BodyPartsPresent []TrainingScoredLabel `json:"bodyPartsPresent"`
 	ObjectsPresent   []TrainingScoredLabel `json:"objectsPresent"`
 	ClothingPresent  []TrainingScoredLabel `json:"clothingPresent"`
-	Boxes            []TrainingBox         `json:"boxes,omitempty"`
+	Boxes            []TrainingBox         `json:"boxes"`
 }
 
 type TrainingCorrection struct {
@@ -68,7 +68,7 @@ type TrainingCorrection struct {
 	BodyPartsPresent []string      `json:"bodyPartsPresent"`
 	ObjectsPresent   []string      `json:"objectsPresent"`
 	ClothingPresent  []string      `json:"clothingPresent"`
-	Boxes            []TrainingBox `json:"boxes,omitempty"`
+	Boxes            []TrainingBox `json:"boxes"`
 }
 
 type TrainingSample struct {
@@ -104,7 +104,11 @@ type TrainingAnnotation struct {
 	Notes           string              `json:"notes,omitempty"`
 }
 
-const minTrainingFeedbackCount = 5
+type TrainingDetectorPrediction struct {
+	Available bool          `json:"available"`
+	Source    string        `json:"source,omitempty"`
+	Boxes     []TrainingBox `json:"boxes"`
+}
 
 type TrainingJobStatus struct {
 	Running    bool   `json:"running"`
@@ -116,6 +120,11 @@ type TrainingJobStatus struct {
 	FinishedAt string `json:"finishedAt,omitempty"`
 }
 
+const minTrainingFeedbackCount = 5
+
+const minDetectorTrainCount = 20
+const minDetectorValCount = 3
+
 var trainingJob = struct {
 	mu     sync.Mutex
 	status TrainingJobStatus
@@ -457,17 +466,45 @@ func trainingTrainHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	feedbackPath := filepath.Join(root, "feedback.jsonl")
-	count, _ := trainingCountAnnotations(feedbackPath)
+	// Falls bisher alles zufällig in train gelandet ist, erzeugen wir mindestens
+	// ein Validation-Sample durch Kopieren. Bei mehr Daten solltest du später
+	// einen echten 80/20 Split verwenden.
+	if err := trainingEnsureDetectorValidationSample(root); err != nil {
+		fmt.Println("⚠️ detector val sample ensure failed:", err)
+	}
 
-	if count < minTrainingFeedbackCount {
+	feedbackPath := filepath.Join(root, "feedback.jsonl")
+	feedbackCount, _ := trainingCountAnnotations(feedbackPath)
+
+	detectorTrainImages := filepath.Join(root, "detector", "dataset", "images", "train")
+	detectorTrainLabels := filepath.Join(root, "detector", "dataset", "labels", "train")
+	detectorValImages := filepath.Join(root, "detector", "dataset", "images", "val")
+	detectorValLabels := filepath.Join(root, "detector", "dataset", "labels", "val")
+	detectorDatasetYAML := filepath.Join(root, "detector", "dataset", "dataset.yaml")
+
+	trainCount := trainingCountDetectorSamples(detectorTrainImages, detectorTrainLabels)
+	valCount := trainingCountDetectorSamples(detectorValImages, detectorValLabels)
+
+	if !fileExistsNonEmpty(detectorDatasetYAML) {
+		trainingWriteError(
+			w,
+			http.StatusBadRequest,
+			"YOLO dataset.yaml fehlt oder ist leer. Bitte Detector-Ordner/Dataset prüfen.",
+		)
+		return
+	}
+
+	if trainCount < minDetectorTrainCount || valCount < minDetectorValCount {
 		trainingWriteError(
 			w,
 			http.StatusBadRequest,
 			fmt.Sprintf(
-				"Zu wenige Bewertungen. Mindestens %d, aktuell %d.",
-				minTrainingFeedbackCount,
-				count,
+				"Zu wenige YOLO-Box-Labels. Benötigt: mindestens %d Train und %d Val. Aktuell: Train=%d, Val=%d. Feedback gesamt: %d.",
+				minDetectorTrainCount,
+				minDetectorValCount,
+				trainCount,
+				valCount,
+				feedbackCount,
 			),
 		)
 		return
@@ -477,17 +514,27 @@ func trainingTrainHandler(w http.ResponseWriter, r *http.Request) {
 		*s = TrainingJobStatus{
 			Running:   true,
 			Progress:  5,
-			Step:      "Training wird vorbereitet…",
+			Step:      "YOLO-Detector-Training wird vorbereitet…",
 			StartedAt: time.Now().UTC().Format(time.RFC3339),
 		}
 	})
 
-	go trainingRunJob(root, count)
+	go trainingRunJob(root, feedbackCount)
 
 	trainingWriteJSON(w, http.StatusAccepted, map[string]any{
 		"ok":       true,
-		"message":  "Training gestartet.",
+		"message":  "YOLO-Detector-Training gestartet.",
 		"training": trainingGetJobStatus(),
+		"detector": map[string]any{
+			"trainCount":      trainCount,
+			"valCount":        valCount,
+			"requiredTrain":   minDetectorTrainCount,
+			"requiredVal":     minDetectorValCount,
+			"datasetYAML":     detectorDatasetYAML,
+			"usesSceneKNN":    false,
+			"usesResNet18KNN": false,
+			"source":          "yolo_detector",
+		},
 	})
 }
 
@@ -495,25 +542,7 @@ func trainingRunJob(root string, count int) {
 	python := trainingPythonExe()
 
 	trainingSetJobStatus(func(s *TrainingJobStatus) {
-		s.Progress = 15
-		s.Step = "Scene-Modell wird trainiert…"
-	})
-
-	sceneScript := trainingScriptPath("train_scene_model.py")
-	sceneOut, err := trainingRunCommand(python, sceneScript, "--root", root)
-	if err != nil {
-		trainingSetJobStatus(func(s *TrainingJobStatus) {
-			s.Running = false
-			s.Progress = 0
-			s.Step = ""
-			s.Error = fmt.Sprintf("scene training failed: %v: %s", err, sceneOut)
-			s.FinishedAt = time.Now().UTC().Format(time.RFC3339)
-		})
-		return
-	}
-
-	trainingSetJobStatus(func(s *TrainingJobStatus) {
-		s.Progress = 65
+		s.Progress = 20
 		s.Step = "Detector-Daten werden geprüft…"
 	})
 
@@ -526,13 +555,21 @@ func trainingRunJob(root string, count int) {
 	detectorValImages := filepath.Join(root, "detector", "dataset", "images", "val")
 	detectorValLabels := filepath.Join(root, "detector", "dataset", "labels", "val")
 
+	if err := trainingEnsureDetectorValidationSample(root); err != nil {
+		fmt.Println("⚠️ detector val sample ensure failed:", err)
+	}
+
 	trainCount := trainingCountDetectorSamples(detectorTrainImages, detectorTrainLabels)
 	valCount := trainingCountDetectorSamples(detectorValImages, detectorValLabels)
 
-	if fileExistsNonEmpty(detectorDatasetYAML) && trainCount >= 5 && valCount >= 1 {
+	fmt.Printf("🔎 detector data: train=%d val=%d yaml=%v\n", trainCount, valCount, fileExistsNonEmpty(detectorDatasetYAML))
+
+	if fileExistsNonEmpty(detectorDatasetYAML) &&
+		trainCount >= minDetectorTrainCount &&
+		valCount >= minDetectorValCount {
 		trainingSetJobStatus(func(s *TrainingJobStatus) {
-			s.Progress = 75
-			s.Step = "Detector wird trainiert…"
+			s.Progress = 35
+			s.Step = "YOLO-Detector wird trainiert…"
 		})
 
 		detectorScript := trainingScriptPath("train_detector_model.py")
@@ -541,7 +578,7 @@ func trainingRunJob(root string, count int) {
 			detectorScript,
 			"--root", root,
 			"--base", "yolo11n.pt",
-			"--epochs", "20",
+			"--epochs", "60",
 			"--imgsz", "640",
 		)
 
@@ -556,18 +593,25 @@ func trainingRunJob(root string, count int) {
 	} else {
 		detectorStatus = "skipped_no_detector_data"
 		detectorOutput = fmt.Sprintf(
-			"Detector übersprungen: zu wenige YOLO-Box-Labels. Train=%d, Val=%d. Benötigt: mindestens 5 Train und 1 Val.",
+			"Detector übersprungen: zu wenige YOLO-Box-Labels. Train=%d, Val=%d. Benötigt: mindestens %d Train und %d Val.",
 			trainCount,
 			valCount,
+			minDetectorTrainCount,
+			minDetectorValCount,
 		)
+
+		fmt.Println("⚠️", detectorOutput)
 	}
 
-	message := "Training abgeschlossen. Neue Bilder werden jetzt mit dem Scene-Modell analysiert."
+	message := "Training abgeschlossen."
 	if detectorStatus == "trained" {
-		message = "Training abgeschlossen. Scene-Modell und Detector wurden trainiert."
+		message = "Training abgeschlossen. YOLO-Detector wurde trainiert."
 	}
 	if detectorStatus == "failed" {
-		message = "Scene-Modell wurde trainiert, Detector-Training ist fehlgeschlagen."
+		message = "YOLO-Detector-Training ist fehlgeschlagen."
+	}
+	if detectorStatus == "skipped_no_detector_data" {
+		message = detectorOutput
 	}
 
 	trainingSetJobStatus(func(s *TrainingJobStatus) {
@@ -592,17 +636,65 @@ func trainingStatusHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if err := trainingEnsureDetectorDirs(root); err != nil {
+		trainingWriteError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	// Optional, aber praktisch: Status zeigt dann sofort valCount > 0,
+	// falls mindestens genug train-Daten vorhanden sind.
+	if err := trainingEnsureDetectorValidationSample(root); err != nil {
+		fmt.Println("⚠️ detector val sample ensure failed:", err)
+	}
+
 	feedbackPath := filepath.Join(root, "feedback.jsonl")
-	count, _ := trainingCountAnnotations(feedbackPath)
+	feedbackCount, _ := trainingCountAnnotations(feedbackPath)
 
 	job := trainingGetJobStatus()
 
+	detectorDatasetYAML := filepath.Join(root, "detector", "dataset", "dataset.yaml")
+	detectorTrainImages := filepath.Join(root, "detector", "dataset", "images", "train")
+	detectorTrainLabels := filepath.Join(root, "detector", "dataset", "labels", "train")
+	detectorValImages := filepath.Join(root, "detector", "dataset", "images", "val")
+	detectorValLabels := filepath.Join(root, "detector", "dataset", "labels", "val")
+	detectorModelPath := filepath.Join(root, "detector", "model", "best.pt")
+
+	trainCount := trainingCountDetectorSamples(detectorTrainImages, detectorTrainLabels)
+	valCount := trainingCountDetectorSamples(detectorValImages, detectorValLabels)
+
+	datasetReady := fileExistsNonEmpty(detectorDatasetYAML)
+	detectorDataReady := datasetReady &&
+		trainCount >= minDetectorTrainCount &&
+		valCount >= minDetectorValCount
+
 	trainingWriteJSON(w, http.StatusOK, map[string]any{
 		"ok":            true,
-		"feedbackCount": count,
+		"feedbackCount": feedbackCount,
 		"requiredCount": minTrainingFeedbackCount,
-		"canTrain":      count >= minTrainingFeedbackCount,
-		"training":      job,
+
+		// Für YOLO-only ist canTrain jetzt bewusst an Box-Labels gekoppelt,
+		// nicht mehr nur an feedback.jsonl.
+		"canTrain": detectorDataReady,
+
+		"training": job,
+		"detector": map[string]any{
+			"source":          "yolo_detector",
+			"usesSceneKNN":    false,
+			"usesResNet18KNN": false,
+
+			"trainCount":    trainCount,
+			"valCount":      valCount,
+			"requiredTrain": minDetectorTrainCount,
+			"requiredVal":   minDetectorValCount,
+
+			"datasetReady": datasetReady,
+			"datasetYAML":  detectorDatasetYAML,
+
+			"dataReady": detectorDataReady,
+
+			"modelExists": fileExistsNonEmpty(detectorModelPath),
+			"modelPath":   detectorModelPath,
+		},
 	})
 }
 
@@ -883,49 +975,260 @@ func trainingPredictFrame(framePath string) TrainingPrediction {
 		return trainingEmptyPrediction("root_error")
 	}
 
-	python := trainingPythonExe()
-	script := trainingScriptPath("predict_scene_model.py")
+	det := trainingPredictDetector(root, framePath)
 
-	cmd := exec.Command(
-		python,
-		script,
-		"--root", root,
-		"--image", framePath,
-	)
+	pred := trainingPredictionFromDetector(det)
 
-	cmd.SysProcAttr = &syscall.SysProcAttr{
-		HideWindow:    true,
-		CreationFlags: 0x08000000,
+	fmt.Println("✅ training predict result")
+	fmt.Println("  modelAvailable:", pred.ModelAvailable)
+	fmt.Println("  source:", pred.Source)
+	fmt.Println("  sexPosition:", pred.SexPosition)
+	fmt.Println("  bodyParts:", len(pred.BodyPartsPresent))
+	fmt.Println("  objects:", len(pred.ObjectsPresent))
+	fmt.Println("  clothing:", len(pred.ClothingPresent))
+	fmt.Println("  boxes:", len(pred.Boxes))
+
+	return pred
+}
+
+func trainingPredictionFromDetector(det TrainingDetectorPrediction) TrainingPrediction {
+	boxes := det.Boxes
+	if boxes == nil {
+		boxes = []TrainingBox{}
 	}
 
-	out, err := cmd.CombinedOutput()
-	outText := strings.TrimSpace(string(out))
+	pred := TrainingPrediction{
+		ModelAvailable:   det.Available,
+		Source:           det.Source,
+		PeopleCount:      0,
+		MaleCount:        0,
+		FemaleCount:      0,
+		UnknownCount:     0,
+		SexPosition:      "unknown",
+		SexPositionScore: 0,
+		BodyPartsPresent: []TrainingScoredLabel{},
+		ObjectsPresent:   []TrainingScoredLabel{},
+		ClothingPresent:  []TrainingScoredLabel{},
+		Boxes:            boxes,
+	}
 
+	if pred.Source == "" {
+		if det.Available {
+			pred.Source = "yolo_detector"
+		} else {
+			pred.Source = "detector_missing"
+		}
+	}
+
+	grouped, err := trainingGroupedLabels()
 	if err != nil {
-		fmt.Println("⚠️ training predict failed:", err, outText)
-		return trainingEmptyPrediction("predict_failed")
+		fmt.Println("⚠️ detector label grouping failed:", err)
+		return pred
 	}
 
-	var pred TrainingPrediction
-	if err := json.Unmarshal(out, &pred); err != nil {
-		fmt.Println("⚠️ training predict json failed:", err, outText)
-		return trainingEmptyPrediction("predict_json_failed")
+	pred.BodyPartsPresent = trainingScoredLabelsFromDetectorBoxes(boxes, grouped.BodyParts)
+	pred.ObjectsPresent = trainingScoredLabelsFromDetectorBoxes(boxes, grouped.Objects)
+	pred.ClothingPresent = trainingScoredLabelsFromDetectorBoxes(boxes, grouped.Clothing)
+
+	return pred
+}
+
+func trainingPredictDetector(root string, framePath string) TrainingDetectorPrediction {
+	python := trainingPythonExe()
+	script := trainingScriptPath("predict_detector_model.py")
+
+	modelPath := filepath.Join(root, "detector", "model", "best.pt")
+
+	fmt.Println("🔎 detector predict")
+	fmt.Println("  python:", python)
+	fmt.Println("  root:", root)
+	fmt.Println("  script:", script)
+	fmt.Println("  image:", framePath)
+	fmt.Println("  model:", modelPath)
+	fmt.Println("  modelExists:", fileExistsNonEmpty(modelPath))
+
+	if !fileExistsNonEmpty(modelPath) {
+		return TrainingDetectorPrediction{
+			Available: false,
+			Source:    "detector_missing",
+			Boxes:     []TrainingBox{},
+		}
 	}
 
-	if pred.SexPosition == "" {
-		pred.SexPosition = "unknown"
+	confValues := []string{"0.30", "0.10", "0.03", "0.01"}
+
+	best := TrainingDetectorPrediction{
+		Available: true,
+		Source:    "yolo_detector",
+		Boxes:     []TrainingBox{},
 	}
-	if pred.BodyPartsPresent == nil {
+
+	for _, conf := range confValues {
+		cmd := exec.Command(
+			python,
+			script,
+			"--root", root,
+			"--image", framePath,
+			"--conf", conf,
+			"--imgsz", "640",
+		)
+
+		cmd.SysProcAttr = &syscall.SysProcAttr{
+			HideWindow:    true,
+			CreationFlags: 0x08000000,
+		}
+
+		var stdout strings.Builder
+		var stderr strings.Builder
+
+		cmd.Stdout = &stdout
+		cmd.Stderr = &stderr
+
+		err := cmd.Run()
+
+		outText := strings.TrimSpace(stdout.String())
+		errText := strings.TrimSpace(stderr.String())
+
+		if errText != "" {
+			fmt.Println("🔎 detector stderr:", errText)
+		}
+
+		if err != nil {
+			fmt.Println("⚠️ detector predict failed")
+			fmt.Println("  conf:", conf)
+			fmt.Println("  error:", err)
+			fmt.Println("  stdout:", outText)
+			fmt.Println("  stderr:", errText)
+			continue
+		}
+
+		if outText == "" {
+			fmt.Println("⚠️ detector predict empty stdout")
+			fmt.Println("  conf:", conf)
+			fmt.Println("  stderr:", errText)
+			continue
+		}
+
+		var det TrainingDetectorPrediction
+		if err := json.Unmarshal([]byte(outText), &det); err != nil {
+			fmt.Println("⚠️ detector predict json failed:", err)
+			fmt.Println("  conf:", conf)
+			fmt.Println("  stdout:", outText)
+			fmt.Println("  stderr:", errText)
+			continue
+		}
+
+		if det.Boxes == nil {
+			det.Boxes = []TrainingBox{}
+		}
+
+		if det.Source == "" {
+			det.Source = "yolo_detector"
+		}
+
+		fmt.Println("✅ detector predict result")
+		fmt.Println("  conf:", conf)
+		fmt.Println("  available:", det.Available)
+		fmt.Println("  source:", det.Source)
+		fmt.Println("  boxes:", len(det.Boxes))
+
+		best = det
+
+		if len(det.Boxes) > 0 {
+			return det
+		}
+	}
+
+	if best.Boxes == nil {
+		best.Boxes = []TrainingBox{}
+	}
+
+	return best
+}
+
+func trainingScoredLabelsFromDetectorBoxes(
+	boxes []TrainingBox,
+	group []string,
+) []TrainingScoredLabel {
+	groupSet := map[string]bool{}
+
+	for _, label := range group {
+		clean := strings.TrimSpace(label)
+		if clean != "" {
+			groupSet[clean] = true
+		}
+	}
+
+	best := map[string]float64{}
+
+	for _, box := range boxes {
+		label := strings.TrimSpace(box.Label)
+		if label == "" || !groupSet[label] {
+			continue
+		}
+
+		score := box.Score
+		if score <= 0 {
+			score = 1
+		}
+
+		if old, ok := best[label]; !ok || score > old {
+			best[label] = score
+		}
+	}
+
+	out := make([]TrainingScoredLabel, 0, len(best))
+
+	for label, score := range best {
+		out = append(out, TrainingScoredLabel{
+			Label: label,
+			Score: score,
+		})
+	}
+
+	sort.Slice(out, func(i, j int) bool {
+		if out[i].Score == out[j].Score {
+			return out[i].Label < out[j].Label
+		}
+
+		return out[i].Score > out[j].Score
+	})
+
+	return out
+}
+
+func trainingApplyDetectorToPrediction(pred TrainingPrediction, det TrainingDetectorPrediction) TrainingPrediction {
+	boxes := det.Boxes
+	if boxes == nil {
+		boxes = []TrainingBox{}
+	}
+
+	grouped, err := trainingGroupedLabels()
+	if err != nil {
+		fmt.Println("⚠️ detector label grouping failed:", err)
+
+		pred.Boxes = boxes
 		pred.BodyPartsPresent = []TrainingScoredLabel{}
-	}
-	if pred.ObjectsPresent == nil {
 		pred.ObjectsPresent = []TrainingScoredLabel{}
-	}
-	if pred.ClothingPresent == nil {
 		pred.ClothingPresent = []TrainingScoredLabel{}
+		return pred
 	}
-	if pred.Boxes == nil {
-		pred.Boxes = []TrainingBox{}
+
+	// Wichtig:
+	// Ab jetzt kommen diese drei Bereiche ausschließlich vom YOLO-Detector.
+	// Kein Scene-KNN-Fallback, damit keine Labels ohne Box angezeigt werden.
+	pred.BodyPartsPresent = trainingScoredLabelsFromDetectorBoxes(boxes, grouped.BodyParts)
+	pred.ObjectsPresent = trainingScoredLabelsFromDetectorBoxes(boxes, grouped.Objects)
+	pred.ClothingPresent = trainingScoredLabelsFromDetectorBoxes(boxes, grouped.Clothing)
+	pred.Boxes = boxes
+
+	if det.Available {
+		if pred.Source == "" {
+			pred.Source = "yolo_detector"
+		} else {
+			pred.Source = pred.Source + "+yolo_detector"
+		}
+		pred.ModelAvailable = true
 	}
 
 	return pred
@@ -946,8 +1249,7 @@ func trainingWriteDetectorSample(root string, sample *TrainingSample, boxes []Tr
 		return fmt.Errorf("frame missing: %w", err)
 	}
 
-	// Erstmal alles in train schreiben.
-	// Später kannst du 80/20 train/val splitten.
+	// Stabiler 80/20 Split: gleicher sampleID landet immer im gleichen Split.
 	split := trainingStableSplit(sample.SampleID)
 
 	imgDir := filepath.Join(root, "detector", "dataset", "images", split)
@@ -1010,6 +1312,80 @@ func trainingWriteDetectorSample(root string, sample *TrainingSample, boxes []Tr
 	return os.WriteFile(labelPath, []byte(strings.Join(lines, "\n")+"\n"), 0644)
 }
 
+func trainingEnsureDetectorValidationSample(root string) error {
+	trainImages := filepath.Join(root, "detector", "dataset", "images", "train")
+	trainLabels := filepath.Join(root, "detector", "dataset", "labels", "train")
+	valImages := filepath.Join(root, "detector", "dataset", "images", "val")
+	valLabels := filepath.Join(root, "detector", "dataset", "labels", "val")
+
+	currentVal := trainingCountDetectorSamples(valImages, valLabels)
+	if currentVal >= minDetectorValCount {
+		return nil
+	}
+
+	if trainingCountDetectorSamples(trainImages, trainLabels) < minDetectorTrainCount {
+		return nil
+	}
+
+	entries, err := os.ReadDir(trainImages)
+	if err != nil {
+		return nil
+	}
+
+	if err := os.MkdirAll(valImages, 0755); err != nil {
+		return err
+	}
+	if err := os.MkdirAll(valLabels, 0755); err != nil {
+		return err
+	}
+
+	copied := 0
+	needed := minDetectorValCount - currentVal
+
+	for _, e := range entries {
+		if copied >= needed {
+			break
+		}
+
+		if e.IsDir() {
+			continue
+		}
+
+		ext := strings.ToLower(filepath.Ext(e.Name()))
+		if ext != ".jpg" && ext != ".jpeg" && ext != ".png" && ext != ".webp" {
+			continue
+		}
+
+		id := strings.TrimSuffix(e.Name(), filepath.Ext(e.Name()))
+
+		srcImage := filepath.Join(trainImages, e.Name())
+		srcLabel := filepath.Join(trainLabels, id+".txt")
+
+		if !fileExistsNonEmpty(srcImage) || !fileExistsNonEmpty(srcLabel) {
+			continue
+		}
+
+		dstImage := filepath.Join(valImages, e.Name())
+		dstLabel := filepath.Join(valLabels, id+".txt")
+
+		if fileExistsNonEmpty(dstImage) && fileExistsNonEmpty(dstLabel) {
+			continue
+		}
+
+		if err := copyFile(srcImage, dstImage); err != nil {
+			return err
+		}
+		if err := copyFile(srcLabel, dstLabel); err != nil {
+			return err
+		}
+
+		copied++
+		fmt.Println("✅ detector val sample duplicated:", id)
+	}
+
+	return nil
+}
+
 func trainingStableSplit(sampleID string) string {
 	sum := sha1.Sum([]byte(sampleID))
 	if int(sum[0])%5 == 0 {
@@ -1057,21 +1433,16 @@ func trainingProjectRoot() string {
 		return "."
 	}
 
-	// Fall A: Prozess läuft im Projekt-Root:
-	// ./backend/ml/predict_scene_model.py existiert
-	if _, err := os.Stat(filepath.Join(wd, "backend", "ml", "predict_scene_model.py")); err == nil {
+	if _, err := os.Stat(filepath.Join(wd, "backend", "ml", "predict_detector_model.py")); err == nil {
 		return wd
 	}
 
-	// Fall B: Prozess läuft direkt in /backend:
-	// ./ml/predict_scene_model.py existiert
-	if _, err := os.Stat(filepath.Join(wd, "ml", "predict_scene_model.py")); err == nil {
+	if _, err := os.Stat(filepath.Join(wd, "ml", "predict_detector_model.py")); err == nil {
 		return filepath.Dir(wd)
 	}
 
-	// Fall C: Fallback: Parent testen
 	parent := filepath.Dir(wd)
-	if _, err := os.Stat(filepath.Join(parent, "backend", "ml", "predict_scene_model.py")); err == nil {
+	if _, err := os.Stat(filepath.Join(parent, "backend", "ml", "predict_detector_model.py")); err == nil {
 		return parent
 	}
 
@@ -1123,51 +1494,35 @@ func isTempBuildDir(dir string) bool {
 }
 
 func trainingBackendRootDir() (string, error) {
-	// Fall 1:
-	// App läuft aus /backend oder EXE liegt neben /ml.
-	// Dann ist "ml/predict_scene_model.py" app-relativ korrekt.
-	if script, err := resolvePathRelativeToApp(filepath.Join("ml", "predict_scene_model.py")); err == nil {
+	if script, err := resolvePathRelativeToApp(filepath.Join("ml", "predict_detector_model.py")); err == nil {
 		if st, statErr := os.Stat(script); statErr == nil && !st.IsDir() {
 			return filepath.Dir(filepath.Dir(script)), nil
 		}
 	}
 
-	// Fall 2:
-	// Dev-Start aus Projekt-Root.
-	// Dann ist "backend/ml/predict_scene_model.py" app-relativ korrekt.
-	if script, err := resolvePathRelativeToApp(filepath.Join("backend", "ml", "predict_scene_model.py")); err == nil {
+	if script, err := resolvePathRelativeToApp(filepath.Join("backend", "ml", "predict_detector_model.py")); err == nil {
 		if st, statErr := os.Stat(script); statErr == nil && !st.IsDir() {
 			return filepath.Dir(filepath.Dir(script)), nil
 		}
 	}
 
-	// Fall 3:
-	// Gebaute App mit embedded ML-Scripts.
-	// Dann gibt es ggf. kein /ml neben der EXE.
-	// In diesem Fall nehmen wir den EXE-Ordner als App/Backend-Root,
-	// solange es nicht go-run Temp ist.
 	if dir, err := exeDir(); err == nil && strings.TrimSpace(dir) != "" && !isTempBuildDir(dir) {
 		return dir, nil
 	}
 
-	// Fall 4:
-	// Dev-Fallback über Working Directory.
 	wd, err := os.Getwd()
 	if err != nil {
 		return "", err
 	}
 
-	// Wenn wir direkt in /backend laufen.
-	if _, err := os.Stat(filepath.Join(wd, "ml", "predict_scene_model.py")); err == nil {
+	if _, err := os.Stat(filepath.Join(wd, "ml", "predict_detector_model.py")); err == nil {
 		return wd, nil
 	}
 
-	// Wenn wir im Projekt-Root laufen.
-	if _, err := os.Stat(filepath.Join(wd, "backend", "ml", "predict_scene_model.py")); err == nil {
+	if _, err := os.Stat(filepath.Join(wd, "backend", "ml", "predict_detector_model.py")); err == nil {
 		return filepath.Join(wd, "backend"), nil
 	}
 
-	// Letzter Fallback: bisherige Projekterkennung.
 	projectRoot := trainingProjectRoot()
 	return filepath.Join(projectRoot, "backend"), nil
 }
diff --git a/frontend/src/components/ui/TrainingTab.tsx b/frontend/src/components/ui/TrainingTab.tsx
index dd1625f..d7d8bda 100644
--- a/frontend/src/components/ui/TrainingTab.tsx
+++ b/frontend/src/components/ui/TrainingTab.tsx
@@ -516,7 +516,7 @@ export default function TrainingTab() {
         }
 
         if (elapsed > 25_000) {
-          setTrainingStep('Scene-Modell wird trainiert…')
+          setTrainingStep('Detector wird trainiert…')
           return Math.min(prev + 0.8, 80)
         }