style(题目): 「你画的流程图」缩略图从 150px 加高到 260px，框里的字看得清

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/web/src/oj/problem/components/FlowchartResult.vue

@@ -491,10 +491,6 @@ function goCode() {
   padding: 8px;
 }
 
-.version-chart :deep(.flowchart-container.compact) {
-  height: 180px;
-}
-
 .score-line {
   display: flex;
   align-items: baseline;