feat(plan): 隐藏待处理和处理中状态的查看按钮

- 待处理和处理中的计划书不显示查看按钮
- 只有已生成和已查看状态才显示查看按钮
- 提升用户体验，避免无效操作

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

@@ -100,8 +100,9 @@
             <view class="h-[1rpx] bg-gray-100 my-[20rpx]"></view>
             <view class="h-[1rpx] bg-gray-100 my-[20rpx]"></view>
 
 
             <!-- Actions -->
             <!-- Actions -->
+            <!-- 只对已生成和已查看状态显示查看按钮 -->
             <ListItemActions
             <ListItemActions
-              :viewable="true"
+              :viewable="item.status === 'generated' || item.status === 'viewed'"
               :deletable="true"
               :deletable="true"
               @view="onView(item)"
               @view="onView(item)"
               @delete="onDelete(item)"
               @delete="onDelete(item)"