revert: "chore(typescript): migrate ts from 5.3 to 5.4 with accompanying code adjustments"

[jikkai]

Reverts #1540

Due to the incomplete support of TypeScript 5.4.2 in NestJS used in the pro version, temporarily revert this PR.

[github-actions]

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#8232681742

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 32.91%. Comparing base (351e2a4) to head (e4b0340).

Files	Patch %	Lines
packages/ui/src/services/shortcut/keycode.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1546      +/-   ##
==========================================
+ Coverage   32.90%   32.91%   +0.01%     
==========================================
  Files         919      919              
  Lines       51149    51129      -20     
  Branches    10645    10645              
==========================================
  Hits        16829    16829              
+ Misses      34320    34300      -20     

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