fix: omit optional artwork create fields

Author: YeongJae0114

src/app/art/new/page.tsx

@@ -30,6 +30,11 @@ function getErrorMessage(error: unknown) {
   return error instanceof Error ? error.message : "작품 등록에 실패했습니다.";
 }
 
+function toOptionalNumber(value: string) {
+  const trimmed = value.trim();
+  return trimmed === "" ? undefined : Number(trimmed);
+}
+
 export default function ArtCreatePage() {
   const router = useRouter();
 
@@ -77,28 +82,23 @@ export default function ArtCreatePage() {
 
     try {
       const uploadedImages = await Promise.all(images.map(image => uploadImage(image.file)));
+      const widthCm = toOptionalNumber(width);
+      const heightCm = toOptionalNumber(height);
+      const depthCm = toOptionalNumber(depth);
 
       await createArtworkMutation({
-        title,
+        title: title.trim(),
         artworkType: artType,
-        description,
-        caution: notes,
-
-        sizeType: "STANDARD",
-
-        widthCm: Number(width),
-        heightCm: Number(height),
-        depthCm: Number(depth),
-
-        createdDate: date?.toISOString().split("T")[0],
-
+        description: description.trim(),
+        ...(notes.trim() !== "" ? { caution: notes.trim() } : {}),
+        ...(widthCm !== undefined ? { widthCm } : {}),
+        ...(heightCm !== undefined ? { heightCm } : {}),
+        ...(depthCm !== undefined ? { depthCm } : {}),
+        ...(date ? { createdDate: date.toISOString().split("T")[0] } : {}),
         isPublic,
-
         imageIds: uploadedImages.map(image => image.imageId),
-
         thumbnailIndex: 0,
-
-        availableRegions: selectedRegions,
+        ...(selectedRegions.length > 0 ? { availableRegions: selectedRegions } : {}),
       });
 
       clearImages();

src/services/artworks.ts

@@ -9,7 +9,7 @@ export interface CreateArtworkRequest {
   description: string;
   caution?: string;
 
-  sizeType: "STANDARD";
+  sizeType?: "STANDARD" | "CUSTOM";
 
   widthCm?: number;
   heightCm?: number;
@@ -21,9 +21,9 @@ export interface CreateArtworkRequest {
 
   imageIds: number[];
 
-  thumbnailIndex: number;
+  thumbnailIndex?: number;
 
-  availableRegions: string[];
+  availableRegions?: string[];
 }
 
 export interface UpdateArtworkRequest {