fix(datepicker): show zero on page

[Alex-huxiyang]

🤔 这个变动的性质是？

• 新特性提交
• 日常 bug 修复
• 站点、文档改进
• 演示代码改进
• 组件样式/交互改进
• TypeScript 定义更新
• 包体积优化
• 性能优化
• 功能增强
• 国际化改进
• 重构
• 代码风格优化
• 测试用例
• 分支合并
• 其他改动（是关于什么的改动？）

🔗 相关 Issue

💡 需求背景和解决方案

☑️ 请求合并前的自查清单

⚠️ 请自检并全部勾选全部选项。⚠️

• 文档已补充或无须补充
• 代码演示已提供或无须提供
• TypeScript 定义已补充或无须补充
• fork仓库代码是否为最新避免文件冲突
• Files changed 没有 package.json lock 等无关文件

Summary by CodeRabbit

• 新特性
  • 改进了日期选择器组件的条件渲染逻辑，增强了类型安全性，减少了运行时错误的可能性。
  • 在条件不满足时，明确返回 null，提升了代码的可读性和控制流的清晰度。

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Commits

Files that changed from the base of the PR and between 1e91614 and 3b04c4d.

Walkthrough

此次更改涉及 DatePicker 组件的条件渲染逻辑，特别是与 pickerOptions 属性相关的部分。更新后的逻辑通过可选链操作符和双重否定操作符显式检查 pickerOptions 的有效性，避免了在未定义或非数组情况下访问其长度属性可能导致的错误。组件在条件不满足时返回 null，从而提高了代码的可读性和控制流的清晰度。

Changes

文件路径	更改摘要
src/packages/datepicker/datepicker.taro.tsx src/packages/datepicker/datepicker.tsx	修改了 pickerOptions 的条件渲染逻辑，增加了对其是否为数组的检查，并在条件不满足时返回 null。

Poem

🐰 在日历上跳跃，时光如梭，
选项清晰，逻辑更优。
条件检查，错误不再，
小兔欢喜，舞动不息，
代码如歌，乐在其中！ 🎶

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.11%. Comparing base (e3dc367) to head (3b04c4d).
Report is 4 commits behind head on next.

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #2582      +/-   ##
==========================================
- Coverage   83.18%   83.11%   -0.07%     
==========================================
  Files         217      218       +1     
  Lines       17804    17826      +22     
  Branches     2543     2546       +3     
==========================================
+ Hits        14810    14816       +6     
- Misses       2989     3005      +16     
  Partials        5        5              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[xiaoyatong]

简化一下写法

[Alex-huxiyang]

简化一下写法

嗯嗯，初始化就是数组，去掉判断了