fixed training root detection

backend/ai_server.py

@@ -69,27 +69,11 @@ def resolve_detection_labels_path() -> Path:
             return p
         raise RuntimeError(f"DETECTION_LABELS_PATH not found: {p}")
 
-    candidates = [
-        TRAINING_ROOT / "detection_labels.json",
+    p = TRAINING_ROOT / "detection_labels.json"
+    if existing_file(p):
+        return p.resolve()
 
-        # Wenn ai_server.py direkt neben detection_labels.json embedded liegt:
-        BASE_DIR / "detection_labels.json",
-
-        # Dev-Fallbacks:
-        BASE_DIR / "ml" / "detection_labels.json",
-        BASE_DIR.parent / "ml" / "detection_labels.json",
-        Path.cwd() / "ml" / "detection_labels.json",
-        Path.cwd() / "backend" / "ml" / "detection_labels.json",
-    ]
-
-    for p in candidates:
-        if existing_file(p):
-            return p.resolve()
-
-    raise RuntimeError(
-        "detection_labels.json not found. Checked: "
-        + ", ".join(str(p) for p in candidates)
-    )
+    raise RuntimeError(f"detection_labels.json not found: {p}")
 
 
 def resolve_model_path() -> str:

backend/analyze.go

@@ -63,7 +63,7 @@ const (
 
 	// Video-Modus: extrahiert 1 Frame alle N Sekunden.
 	// 1 = jeder Sekunde, 3 = alle 3 Sekunden, 5 = alle 5 Sekunden.
-	analyzeVideoFrameIntervalSeconds = 2
+	analyzeVideoFrameIntervalSeconds = 3
 
 	// AI-Server nicht mit tausenden Pfaden auf einmal fluten.
 	analyzeFramePredictBatchSize = 32

backend/server.go

@@ -298,8 +298,14 @@ func startAIServer(ctx context.Context) (*aiServerProcess, error) {
 		exeDir = filepath.Dir(exePath)
 	}
 
-	defaultProdModel := filepath.Join(exeDir, "generated", "training", "detector", "model", "best.pt")
-	scriptDirModel := filepath.Join(scriptDir, "generated", "training", "detector", "model", "best.pt")
+	appBaseDir := exeDir
+	if strings.TrimSpace(appBaseDir) == "" {
+		appBaseDir, _ = os.Getwd()
+	}
+
+	trainingRoot := filepath.Join(appBaseDir, "generated", "training")
+	detectionLabelsPath := filepath.Join(trainingRoot, "detection_labels.json")
+	defaultModelPath := filepath.Join(trainingRoot, "detector", "model", "best.pt")
 
 	pythonPath := aiServerPythonPath()
 	port := aiServerPortFromURL()
@@ -328,14 +334,29 @@ func startAIServer(ctx context.Context) (*aiServerProcess, error) {
 		"AI_SERVER_URL="+aiServerURL(),
 	)
 
-	// Defaults nur setzen, wenn nicht schon extern gesetzt.
+	// Immer App-Root/generated/training verwenden.
+	env = upsertEnv(env, "APP_BASE_DIR", appBaseDir)
+	env = upsertEnv(env, "TRAINING_ROOT", trainingRoot)
+	env = upsertEnv(env, "DETECTION_LABELS_PATH", detectionLabelsPath)
+
+	// Modell ebenfalls standardmäßig aus generated/training nehmen,
+	// aber YOLO_MODEL darf weiterhin extern überschrieben werden.
 	if strings.TrimSpace(os.Getenv("YOLO_MODEL")) == "" {
-		if fi, err := os.Stat(scriptDirModel); err == nil && fi != nil && !fi.IsDir() {
-			env = append(env, "YOLO_MODEL="+scriptDirModel)
-		} else if fi, err := os.Stat(defaultProdModel); err == nil && fi != nil && !fi.IsDir() {
-			env = append(env, "YOLO_MODEL="+defaultProdModel)
-		}
+		env = upsertEnv(env, "YOLO_MODEL", defaultModelPath)
 	}
+
+	if fi, err := os.Stat(detectionLabelsPath); err != nil || fi == nil || fi.IsDir() {
+		appLogln("⚠️ detection_labels.json nicht gefunden:", detectionLabelsPath)
+	} else {
+		appLogln("✅ detection_labels.json:", detectionLabelsPath)
+	}
+
+	if fi, err := os.Stat(defaultModelPath); err != nil || fi == nil || fi.IsDir() {
+		appLogln("⚠️ YOLO Modell nicht gefunden:", defaultModelPath)
+	} else {
+		appLogln("✅ YOLO Modell:", defaultModelPath)
+	}
+
 	if strings.TrimSpace(os.Getenv("YOLO_IMGSZ")) == "" {
 		env = append(env, "YOLO_IMGSZ=640")
 	}
@@ -415,6 +436,37 @@ func setEnvIfMissing(key, value string) {
 	_ = os.Setenv(key, value)
 }
 
+func upsertEnv(env []string, key string, value string) []string {
+	key = strings.TrimSpace(key)
+	value = strings.TrimSpace(value)
+
+	if key == "" {
+		return env
+	}
+
+	prefix := strings.ToUpper(key) + "="
+	out := make([]string, 0, len(env)+1)
+	replaced := false
+
+	for _, item := range env {
+		if strings.HasPrefix(strings.ToUpper(item), prefix) {
+			if !replaced && value != "" {
+				out = append(out, key+"="+value)
+				replaced = true
+			}
+			continue
+		}
+
+		out = append(out, item)
+	}
+
+	if !replaced && value != "" {
+		out = append(out, key+"="+value)
+	}
+
+	return out
+}
+
 func loadEmbeddedDotEnv() {
 	b, err := embeddedDotEnvBytes()
 	if err != nil {