fix(文案): 不再用「他」称呼学生，男生女生看着都别扭；老师看主页的按钮改成「智能分析」「提交记录」

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

apps/web/src/oj/rank/components/RankPodium.vue

@@ -83,8 +83,8 @@ const HEIGHTS: Record<number, number> = { 1: 56, 2: 44, 3: 34 }
             <button
               v-if="teacher"
               class="clear"
-              aria-label="清空他的签名"
-              title="清空他的签名"
+              aria-label="清空签名"
+              title="清空签名"
               @click="$emit('clearMood', row)"
             >
               ×