refactor: using maps.Clone to simplify the code

[zhuhaicity]

This is a new function added in the go1.21 standard library, which can make the code more concise and easy to read.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.99%. Comparing base (939a837) to head (08234b6).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2090   +/-   ##
=======================================
  Coverage   42.99%   42.99%           
=======================================
  Files          85       85           
  Lines       11601    11598    -3     
=======================================
- Hits         4988     4987    -1     
+ Misses       6166     6165    -1     
+ Partials      447      446    -1     

Files with missing lines	Coverage Δ
app/app.go	85.91% <100.00%> (-0.08%)	⬇️

... and 1 file with indirect coverage changes