refactor: consolidate count and relative-time formatting utilities

[xuang7]

What changes were proposed in this PR?

This PR extracts duplicated formatCount and relative-time formatting logic into the shared format.util.ts utility file, and updates inline usages to use the shared utilities. No behavior change.

Any related issues, documentation, discussions?

Closes #5218

How was this PR tested?

Existing automated tests passed.

Was this PR authored or co-authored using generative AI tooling?

Generated-by: Claude Opus 4.7

[codecov-commenter]

Codecov Report

❌ Patch coverage is 90.32258% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 45.99%. Comparing base (d8c254c) to head (aa8e3bf).

Files with missing lines	Patch %	Lines
...-item/user-computing-unit-list-item.component.html	0.00%	1 Missing ⚠️
...st-item/user-computing-unit-list-item.component.ts	50.00%	1 Missing ⚠️
...t/workflow/detail/hub-workflow-detail.component.ts	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #5220      +/-   ##
============================================
- Coverage     48.95%   45.99%   -2.97%     
+ Complexity     2377     2218     -159     
============================================
  Files          1048     1050       +2     
  Lines         40270    40661     +391     
  Branches       4272     4332      +60     
============================================
- Hits          19714    18700    -1014     
- Misses        19402    20835    +1433     
+ Partials       1154     1126      -28     

Flag	Coverage Δ		*Carryforward flag
access-control-service	39.53% <ø> (ø)		Carriedforward from e7e5d4e
agent-service	33.74% <ø> (-0.03%)	⬇️	Carriedforward from e7e5d4e
amber	44.11% <ø> (-7.47%)	⬇️	Carriedforward from e7e5d4e
computing-unit-managing-service	0.00% <ø> (ø)		Carriedforward from e7e5d4e
config-service	0.00% <ø> (ø)		Carriedforward from e7e5d4e
file-service	32.09% <ø> (-5.90%)	⬇️	Carriedforward from e7e5d4e
frontend	40.88% <90.32%> (+0.23%)	⬆️
python	90.50% <ø> (-0.30%)	⬇️	Carriedforward from e7e5d4e
workflow-compiling-service	56.81% <ø> (ø)		Carriedforward from e7e5d4e

*This pull request uses carry forward flags. Click here to find out more.

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[Yicong-Huang]

Good change! But I would kindly ask you to provide tests for all those format utils. The coverage is quite low currently.

[xuang7]

Good change! But I would kindly ask you to provide tests for all those format utils. The coverage is quite low currently.

I added tests for the format utils. For the component call sites, adding tests would require quite a bit of setup, so it felt beyond the scope of this PR and I didn't include those tests. Thanks!