feat(content): 유료 콘텐츠에만 정산요율 설정 UI 노출 및 요청 가드

src/views/Content/ContentList.vue

@@ -364,7 +364,7 @@
               </v-col>
             </v-row>
           </v-card-text>
-          <v-card-text>
+          <v-card-text v-if="selected_audio_content.price > 0">
             <v-row align="center">
               <v-col cols="4">
                 정산요율
@@ -381,7 +381,7 @@
               </v-col>
             </v-row>
           </v-card-text>
-          <v-card-text>
+          <v-card-text v-if="selected_audio_content.price > 0">
             <v-row>
               <v-col cols="4">
                 정산요율 삭제
@@ -677,9 +677,14 @@ export default {
         const request = {
           id: this.audio_content.id,
           isDefaultCoverImage: this.audio_content.is_default_cover_image,
-          isSettlementRatioDeleted: this.audio_content.is_settlement_ratio_deleted,
         };
 
+        // 유료 콘텐츠인 경우에만 정산요율 관련 플래그/값 전송 고려
+        const isPaid = this.selected_audio_content && this.selected_audio_content.price > 0;
+        if (isPaid) {
+          request.isSettlementRatioDeleted = this.audio_content.is_settlement_ratio_deleted;
+        }
+
         if (
           this.audio_content.title !== this.selected_audio_content.title &&
           this.audio_content.title.trim().length > 0
@@ -717,7 +722,7 @@ export default {
           this.audio_content.settlement_ratio !== undefined
             ? String(this.audio_content.settlement_ratio)
             : "";
-        if (!this.audio_content.is_settlement_ratio_deleted && newRatio !== originalRatio) {
+        if (isPaid && !this.audio_content.is_settlement_ratio_deleted && newRatio !== originalRatio) {
           request.settlementRatio = newRatio;
         }