fix: prevent list-content from shrinking in flex container

Add flex-shrink: 0 to maintain stable content sizing.

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

Author: zombieJ

assets/geek.less

@@ -123,6 +123,7 @@
   &-list-content {
     position: relative;
     display: flex;
+    flex-shrink: 0;
     flex-direction: column;
     gap: 8px;
     width: 100%;