Refactor: 프로젝트 당 학습 모델 1개

frontend/src/components/ModelManage/TrainingSettings.tsx

@@ -70,6 +70,7 @@ export default function TrainingSettings({
             const selected = models?.find((model) => model.id === parseInt(value, 10));
             setSelectedModel(selected || null);
           }}
+          disabled={isWaiting || isTraining}
         />
       </div>
 

frontend/src/components/ModelManage/TrainingTab.tsx

@@ -34,13 +34,13 @@ export default function TrainingTab({ projectId }: TrainingTabProps) {
       );
       setIsTraining(newIsTraining);
 
-      if (selectedModel && trainingModels.some((model) => model.id === selectedModel.id)) {
-        setSelectedModel(selectedModel);
+      if (trainingModels.length > 0) {
+        setSelectedModel(trainingModels[0]);
       } else {
         setSelectedModel(null);
       }
     }
-  }, [models, selectedModel]);
+  }, [models]);
 
   useEffect(() => {
     if (models && selectedModel) {