fix: enable hmr to avoid reload

[ClarkXia]

问题原因 #5535

导出 pageConfig / dataLoader 组件降级为 hot reload
仅仅为组件的导出，支持 fast refresh（原因为 env 插件导致每次认为模块都有变化）

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (release/next@c23c10e). Click here to learn what that means.
Patch has no changes to coverable lines.

❗ Current head 9cd2230 differs from pull request most recent head ed29192. Consider uploading reports for the commit ed29192 to get more accurate results

Additional details and impacted files

@@               Coverage Diff               @@
##             release/next    #6004   +/-   ##
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  Coverage                ?   81.94%           
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  Files                   ?      197           
  Lines                   ?    18104           
  Branches                ?     2356           
===============================================
  Hits                    ?    14836           
  Misses                  ?     3233           
  Partials                ?       35           

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