Replace .map() with .forEach() where return value is unused

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/views/Discover/Map/Map.vue

@@ -401,7 +401,7 @@ export default {
       };
 
       mapData.edges = [];
-      this[mapType].edges.map(edge => {
+      this[mapType].edges.forEach(edge => {
         mapData.edges.push({
           data: {
             source: edge.tail,
@@ -444,7 +444,7 @@ export default {
       // 找出 type activity's node
       const activityNodeArray = nodes.filter(node => node.data.type === 'activity');
       // 找出除了 start, end 以外所有的 node 的 option value
-      activityNodeArray.map(node => nodeOptionArr.push(node.data[this.dataLayerType][this.dataLayerOption]));
+      activityNodeArray.forEach(node => nodeOptionArr.push(node.data[this.dataLayerType][this.dataLayerOption]));
       // 將node的option值從小到大排序(映對色階淺到深)
       nodeOptionArr = nodeOptionArr.sort((a, b) => a - b);
       for (let i = 0; i < ImgCapsules.length; i++) {
@@ -453,10 +453,10 @@ export default {
         leveledGroups.push(nodeOptionArr.slice(startIdx, endIdx));
       }
       for (let level = 0; level < leveledGroups.length; level++) {
-        leveledGroups[level].map(option => {
+        leveledGroups[level].forEach(option => {
           // 考慮可能有名次一樣的情形
           const curNodes = activityNodeArray.filter(activityNode => activityNode.data[this.dataLayerType][this.dataLayerOption] === option);
-          curNodes.map(curNode => {
+          curNodes.forEach(curNode => {
             curNode.data = {
               ...curNode.data,
               nodeImageUrl: ImgCapsules[level],