fix(reaction): fix disabled-tooltip hover and post-AC dialog copy

- SubmitCode.vue: AC dialog title still told students to '打星
  评分' after the reaction UI moved to emoji buttons. Rewritten to
  match the emoji-based interaction, with no star/rating language.
- ProblemReaction.vue: n-tooltip's hover trigger merges its
  mouseenter/mouseleave onto the single root element of the trigger
  slot. That root was an n-button, and disabled form controls never
  dispatch mouse events, so the two disabled-state tooltips ('完成本题后可以评价'
  and the max-selection message) never appeared. Wrap each button in
  a non-disabled <span> and make that the tooltip root so hover
  events fire regardless of the button's disabled state.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/oj/problem/components/ProblemReaction.vue

@@ -3,6 +3,7 @@
   <div v-else ref="container" class="reactions">
     <n-tooltip v-for="item in REACTIONS" :key="item.key" trigger="hover">
       <template #trigger>
+        <span class="reaction-trigger">
           <n-button
             size="small"
             :disabled="isDisabled(item.key)"
@@ -14,6 +15,7 @@
             <span v-if="showLabel" class="label">{{ item.label }}</span>
             <span v-if="counts" class="count">{{ counts[item.key] }}</span>
           </n-button>
+        </span>
       </template>
       {{ tooltipOf(item.key, item.label) }}
     </n-tooltip>
@@ -106,6 +108,10 @@ onMounted(() => {
   gap: 8px;
   overflow-x: auto;
 }
+.reaction-trigger {
+  display: inline-flex;
+  flex-shrink: 0;
+}
 .label {
   margin-left: 4px;
 }

src/oj/problem/components/SubmitCode.vue

@@ -259,7 +259,7 @@ watch(
   <!-- 评价弹窗 -->
   <n-modal
     preset="card"
-    title="恭喜你成功提交，请对该题进行评价（一星差评，五星好评）"
+    title="恭喜你成功提交，说说你对这道题的感受吧"
     :mask-closable="false"
     :style="{ maxWidth: isDesktop && '50vw', maxHeight: '80vh' }"
     v-model:show="commentPanel"