input 0일 경우에만 비워주기 추가

src/components/floor-plan/modal/lineTypes/OuterLineWall.jsx

@@ -18,7 +18,11 @@ export default function OuterLineWall({ props }) {
               className="input-origin block"
               value={length1}
               ref={length1Ref}
-              onFocus={(e) => (length1Ref.current.value = '')}
+              onFocus={(e) => {
+                if (length1Ref.current.value === '0') {
+                  length1Ref.current.value = ''
+                }
+              }}
               onChange={(e) => onlyNumberInputChange(e, setLength1)}
               placeholder="3000"
             />