fix(service): improve the styles in colorTheme Service

[mortalYoung]

简介

• 修复某些方法的返回值类型不正确的问题

Related Issues

Closed #738

[codecov]

Codecov Report

Merging #739 (d49756c) into main (61b1753) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #739   +/-   ##
=======================================
  Coverage   91.34%   91.34%           
=======================================
  Files         189      189           
  Lines        5947     5947           
  Branches     1426     1426           
=======================================
  Hits         5432     5432           
  Misses        508      508           
  Partials        7        7           

Impacted Files	Coverage Δ
src/services/theme/colorThemeService.ts	100.00% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 61b1753...d49756c. Read the comment docs.

[wewoor]

+1