feat: 자재 분류 시스템 개선 및 상세 테이블 추가

- 모든 자재 카테고리별 상세 테이블 생성 (fitting, valve, flange, bolt, gasket, instrument)
- PIPE, FITTING, VALVE 분류 결과를 각 상세 테이블에 저장하는 로직 구현
- 프론트엔드 라우팅 정리 및 BOM 현황 페이지 기능 개선
- 자재확인 페이지 에러 처리 개선

TODO: FLANGE, BOLT, GASKET, INSTRUMENT 저장 로직 추가 필요

backend/app/main.py

@@ -440,6 +440,7 @@ def parse_file(file_path: str) -> List[Dict]:
         column_mapping = {
             'description': ['DESCRIPTION', 'Description', 'description', 'DESC', 'Desc', 'desc', 'ITEM', 'Item', 'item'],
             'quantity': ['QTY', 'Quantity', 'quantity', 'QTY.', 'Qty', 'qty', 'AMOUNT', 'Amount', 'amount'],
+            'length': ['LENGTH', 'Length', 'length', 'LG', 'Lg', 'lg', 'LENGTH_MM', 'Length_mm', 'length_mm'],
             'unit': ['UNIT', 'Unit', 'unit', 'UOM', 'Uom', 'uom'],
             'drawing': ['DRAWING', 'Drawing', 'drawing', 'DWG', 'Dwg', 'dwg'],
             'area': ['AREA', 'Area', 'area', 'AREA_CODE', 'Area_Code', 'area_code'],
@@ -466,6 +467,8 @@ def parse_file(file_path: str) -> List[Dict]:
             description = str(row.get(found_columns.get('description', ''), '') or '')
             quantity_raw = row.get(found_columns.get('quantity', 1), 1)
             quantity = float(quantity_raw) if quantity_raw is not None else 1.0
+            length_raw = row.get(found_columns.get('length', 0), 0)
+            length = float(length_raw) if length_raw is not None else 0.0
             unit = str(row.get(found_columns.get('unit', 'EA'), 'EA') or 'EA')
             drawing = str(row.get(found_columns.get('drawing', ''), '') or '')
             area = str(row.get(found_columns.get('area', ''), '') or '')
@@ -475,6 +478,7 @@ def parse_file(file_path: str) -> List[Dict]:
                 "line_number": index + 1,
                 "original_description": description,
                 "quantity": quantity,
+                "length": length,
                 "unit": unit,
                 "drawing_name": drawing,
                 "area_code": area,
@@ -505,42 +509,85 @@ def classify_material_item(material: Dict) -> Dict:
     )
     
     description = material.get("original_description", "")
+    size_spec = material.get("size_spec", "")
+    length = material.get("length", 0.0)  # 길이 정보 추가
     
-    # 각 분류기로 분류 시도
-    classifiers = [
-        ("PIPE", pipe_classifier.classify_pipe),
-        ("FITTING", fitting_classifier.classify_fitting),
-        ("BOLT", bolt_classifier.classify_bolt),
-        ("VALVE", valve_classifier.classify_valve),
-        ("INSTRUMENT", instrument_classifier.classify_instrument),
-        ("FLANGE", flange_classifier.classify_flange),
-        ("GASKET", gasket_classifier.classify_gasket)
-    ]
+    print(f"분류 시도: {description}")
     
-    best_result = None
-    best_confidence = 0.0
+    # 각 분류기로 분류 시도 (개선된 순서와 기준)
+    desc_upper = description.upper()
     
-    for category, classifier_func in classifiers:
-        try:
-            result = classifier_func(description)
-            if result and result.get("confidence", 0) > best_confidence:
-                best_result = result
-                best_confidence = result.get("confidence", 0)
-        except Exception:
-            continue
+    # 1. 명확한 키워드 우선 확인 (높은 신뢰도)
+    if any(keyword in desc_upper for keyword in ['FLG', 'FLANGE', '플랜지', 'RF', 'WN', 'SO', 'BLIND']):
+        classification_result = flange_classifier.classify_flange("", description, size_spec, length)
+        print(f"FLANGE 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+    elif any(keyword in desc_upper for keyword in ['VALVE', 'GATE', 'BALL', 'GLOBE', 'CHECK', '밸브', '게이트', '볼']):
+        classification_result = valve_classifier.classify_valve("", description, size_spec, length)
+        print(f"VALVE 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+    elif any(keyword in desc_upper for keyword in ['ELBOW', 'ELL', 'TEE', 'REDUCER', 'CAP', 'COUPLING', '엘보', '티', '리듀서', '캡']):
+        classification_result = fitting_classifier.classify_fitting("", description, size_spec, length)
+        print(f"FITTING 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+    elif any(keyword in desc_upper for keyword in ['BOLT', 'STUD', 'NUT', 'SCREW', '볼트', '너트', '스터드']):
+        classification_result = bolt_classifier.classify_bolt("", description, size_spec, length)
+        print(f"BOLT 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+    elif any(keyword in desc_upper for keyword in ['GASKET', 'GASK', '가스켓']):
+        classification_result = gasket_classifier.classify_gasket("", description, size_spec, length)
+        print(f"GASKET 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+    elif any(keyword in desc_upper for keyword in ['GAUGE', 'SENSOR', 'TRANSMITTER', 'INSTRUMENT', '계기', '게이지']):
+        classification_result = instrument_classifier.classify_instrument("", description, size_spec, length)
+        print(f"INSTRUMENT 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+    elif any(keyword in desc_upper for keyword in ['PIPE', 'TUBE', '파이프', '배관']):
+        classification_result = pipe_classifier.classify_pipe("", description, size_spec, length)
+        print(f"PIPE 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+    else:
+        # 2. 일반적인 분류 시도 (낮은 신뢰도 임계값)
+        classification_result = flange_classifier.classify_flange("", description, size_spec, length)
+        print(f"FLANGE 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+        
+        if classification_result.get("overall_confidence", 0) < 0.3:
+            classification_result = valve_classifier.classify_valve("", description, size_spec, length)
+            print(f"VALVE 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+        
+        if classification_result.get("overall_confidence", 0) < 0.3:
+            classification_result = fitting_classifier.classify_fitting("", description, size_spec, length)
+            print(f"FITTING 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+        
+        if classification_result.get("overall_confidence", 0) < 0.3:
+            classification_result = pipe_classifier.classify_pipe("", description, size_spec, length)
+            print(f"PIPE 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+        
+        if classification_result.get("overall_confidence", 0) < 0.3:
+            classification_result = bolt_classifier.classify_bolt("", description, size_spec, length)
+            print(f"BOLT 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+        
+        if classification_result.get("overall_confidence", 0) < 0.3:
+            classification_result = gasket_classifier.classify_gasket("", description, size_spec, length)
+            print(f"GASKET 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+        
+        if classification_result.get("overall_confidence", 0) < 0.3:
+            classification_result = instrument_classifier.classify_instrument("", description, size_spec, length)
+            print(f"INSTRUMENT 분류 결과: {classification_result.get('category', 'UNKNOWN')} (신뢰도: {classification_result.get('overall_confidence', 0)})")
+    
+    print(f"최종 분류 결과: {classification_result.get('category', 'UNKNOWN')}")
     
     # 재질 분류
     material_result = material_classifier.classify_material(description)
     
     # 최종 결과 조합
+    # schedule이 딕셔너리인 경우 문자열로 변환
+    schedule_value = classification_result.get("schedule", "")
+    if isinstance(schedule_value, dict):
+        schedule_value = schedule_value.get("schedule", "")
+    
     final_result = {
         **material,
-        "classified_category": best_result.get("category", "UNKNOWN") if best_result else "UNKNOWN",
-        "classified_subcategory": best_result.get("subcategory", "") if best_result else "",
+        "classified_category": classification_result.get("category", "UNKNOWN"),
+        "classified_subcategory": classification_result.get("subcategory", ""),
         "material_grade": material_result.get("grade", "") if material_result else "",
-        "schedule": best_result.get("schedule", "") if best_result else "",
-        "size_spec": best_result.get("size_spec", "") if best_result else "",
-        "classification_confidence": best_confidence
+        "schedule": schedule_value,
+        "size_spec": classification_result.get("size_spec", ""),
+        "classification_confidence": classification_result.get("overall_confidence", 0.0),
+        "length": length  # 길이 정보 추가
     }
     
     return final_result