style(plan): 调整计划书弹窗高度为 88%

- 将计划书录入弹窗高度从 80% 调整为 88%
- 提供更多垂直空间以展示表单内容

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

@@ -7,7 +7,7 @@
     :visible="visible"
     :visible="visible"
     position="bottom"
     position="bottom"
     round
     round
-    :style="{ height: '80%' }"
+    :style="{ height: '88%' }"
     :close-on-click-overlay="true"
     :close-on-click-overlay="true"
     :safe-area-inset-bottom="true"
     :safe-area-inset-bottom="true"
     @update:visible="handleVisibleChange"
     @update:visible="handleVisibleChange"