Render stat rows in semantic description lists

[dreikanter]

Changes:

• Make ListComponent render a <dl> when every item is a StatItemComponent.
• Keep ordinary list-item collections rendered as <ul>.

Why:

Detail components currently place <dt>/<dd> rows inside a <ul>, which is invalid HTML. The shared container can infer the correct semantic element without changing each credential/detail component separately.

References:

• Related issue: Review the code structure #1010 (F-008)

Checks:

• The change is limited to the container-tag selection.
• GitHub Actions will verify existing component coverage.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.55%. Comparing base (ae0c23b) to head (a744357).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1094   +/-   ##
=======================================
  Coverage   97.55%   97.55%           
=======================================
  Files         355      355           
  Lines        8347     8347           
=======================================
  Hits         8143     8143           
  Misses        204      204           

Files with missing lines	Coverage Δ
app/components/list_component.rb	100.00% <100.00%> (ø)

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