Bumped vitest catalog to 4.1.5 to match @vitest/coverage-v8

[9larsons]

Summary

pnpm-workspace.yaml pinned vitest: 4.1.2 in the top-level catalog while @vitest/coverage-v8: 4.1.5 in the same catalog declares an exact peer on vitest@4.1.5. As a result every pnpm install printed:

ghost/core
└─┬ @vitest/coverage-v8 4.1.5
  └── ✕ unmet peer vitest@4.1.5: found 4.1.2

Bumping the catalog vitest entry from 4.1.2 to 4.1.5 (a patch release) realigns the two packages and clears the warning. The lockfile is regenerated to match. Other peer warnings emitted alongside this one (bookshelf/knex, sinon-chai/chai, html-validate/vitest range, @testing-library/react, etc.) are pre-existing and out of scope here.

Test plan

• pnpm install — the unmet peer vitest@4.1.5: found 4.1.2 warning is gone; no new peer warnings appear
• apps/comments-ui pnpm test:unit — 13 test files / 219 tests passed (vitest 4.1.5)
• apps/posts pnpm test:unit — 32 test files / 184 tests passed (vitest 4.1.5)

[coderabbitai]

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Walkthrough

The PR bumps the vitest dependency version from 4.1.2 to 4.1.5 in the pnpm-workspace.yaml catalog configuration. This is a patch-level version update that affects the testing framework used across the monorepo workspace. No other workspace settings or package versions were changed.

Possibly related PRs

• TryGhost/Ghost#27902: Both PRs modify pnpm-workspace.yaml dependency catalog configuration.
• TryGhost/Ghost#27886: Related to Vitest tooling alignment in the workspace catalog.
• TryGhost/Ghost#27898: Adds Vitest configuration that depends on the vitest version in the catalog.

Suggested reviewers

• EvanHahn

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title directly and clearly describes the main change: bumping vitest from 4.1.2 to 4.1.5 in the pnpm workspace catalog to match @vitest/coverage-v8's peer dependency requirement.
Description check	✅ Passed	The description comprehensively explains the peer dependency mismatch issue, the fix applied, and includes a detailed test plan showing the warning is resolved and tests pass with the new version.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bump-vitest-catalog

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.78%. Comparing base (82375b6) to head (b0e04a5).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #27951   +/-   ##
=======================================
  Coverage   73.78%   73.78%           
=======================================
  Files        1522     1522           
  Lines      128637   128637           
  Branches    15415    15420    +5     
=======================================
+ Hits        94911    94914    +3     
+ Misses      32792    32788    -4     
- Partials      934      935    +1     

Flag	Coverage Δ
admin-tests	53.54% <ø> (ø)
e2e-tests	73.78% <ø> (+<0.01%)	⬆️

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