Fix isSafeTagId regex to allow hyphens, matching PerformancePage

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

src/views/Compare/Dashboard/CompareDashboard.vue

@@ -421,7 +421,7 @@ function handleClick(tagId) {
  * @returns {boolean} True if the tag ID is safe.
  */
 function isSafeTagId(tagId) {
-  const pattern = /^#?[a-zA-Z0-9]*$/;
+  const pattern = /^#?[a-zA-Z0-9-]*$/;
   return pattern.test(tagId);
 }