front: fix stdcm empty ch list in new query

[SharglutDev]

fix #10410

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.78%. Comparing base (8affe7b) to head (8221856).
Report is 18 commits behind head on dev.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #10451      +/-   ##
==========================================
- Coverage   81.78%   81.78%   -0.01%     
==========================================
  Files        1073     1073              
  Lines      106574   106593      +19     
  Branches      731      731              
==========================================
+ Hits        87161    87176      +15     
- Misses      19374    19378       +4     
  Partials       39       39              

Flag	Coverage Δ
editoast	74.21% <ø> (-0.02%)	⬇️
front	89.34% <100.00%> (+<0.01%)	⬆️
gateway	2.18% <ø> (ø)
osrdyne	3.28% <ø> (ø)
railjson_generator	87.50% <ø> (ø)
tests	87.05% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

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

[Akctarus]

tested, left a comment but does not block approval

[clarani]

Related to #10401

[kmer2016]

lgtm