feat: Enhance copy functionality for item inspection information

- Introduced state management for copy form and inspection rows to facilitate editing and copying of inspection data.
- Implemented logic to duplicate selected inspection data into a copy modal, allowing users to edit and manage copied information.
- Enhanced the copy process to include validation and user feedback, ensuring a smooth experience when copying inspection details to multiple target items.
- Updated the modal handling to support dynamic row management for copied inspection items, improving usability and flexibility.

frontend/components/common/SmartSelect.tsx

@@ -47,9 +47,15 @@ export function SmartSelect({
   const [search, setSearch] = useState("");
   const scrollRef = useRef<HTMLDivElement | null>(null);
 
+  // code가 비어있는 옵션은 자동 제외 (Radix Select value 제약 + key 중복 방지)
+  const safeOptions = useMemo(
+    () => options.filter((o) => o.code !== null && o.code !== undefined && o.code !== ""),
+    [options],
+  );
+
   const selectedLabel = useMemo(
-    () => options.find((o) => o.code === value)?.label,
-    [options, value],
+    () => safeOptions.find((o) => o.code === value)?.label,
+    [safeOptions, value],
   );
 
   // 팝오버 닫힐 때 검색어 리셋
@@ -60,9 +66,9 @@ export function SmartSelect({
   // 검색어로 옵션 필터 (대소문자 무시)
   const filtered = useMemo(() => {
     const q = search.trim().toLowerCase();
-    if (!q) return options;
-    return options.filter((o) => o.label.toLowerCase().includes(q));
-  }, [options, search]);
+    if (!q) return safeOptions;
+    return safeOptions.filter((o) => o.label.toLowerCase().includes(q));
+  }, [safeOptions, search]);
 
   const virtualizer = useVirtualizer({
     count: filtered.length,
@@ -78,15 +84,15 @@ export function SmartSelect({
     return () => cancelAnimationFrame(id);
   }, [open, virtualizer, filtered.length]);
 
-  if (options.length < SEARCH_THRESHOLD) {
+  if (safeOptions.length < SEARCH_THRESHOLD) {
     return (
       <Select value={value} onValueChange={onValueChange} disabled={disabled}>
         <SelectTrigger className={cn("h-9", className)}>
           <SelectValue placeholder={placeholder} />
         </SelectTrigger>
         <SelectContent>
-          {options.map((o) => (
-            <SelectItem key={o.code} value={o.code}>
+          {safeOptions.map((o, idx) => (
+            <SelectItem key={`${o.code}-${idx}`} value={o.code}>
               {o.label}
             </SelectItem>
           ))}
@@ -146,7 +152,7 @@ export function SmartSelect({
                 const isSelected = value === o.code;
                 return (
                   <button
-                    key={o.code}
+                    key={`${o.code}-${vItem.index}`}
                     type="button"
                     onClick={() => {
                       onValueChange(o.code);