fix: make catalog previews independent of host timezone

[tannerlinsley]

Fix

Pin the catalog preview browser to UTC, alongside the existing en-US locale. Without a fixed timezone, ISO date labels change with the machine running pnpm catalog:previews.

Thanks to @piecyk for reporting the regeneration difference while working on #229. This is a separate tooling fix, not the print-width fix.

The normal preview generator updated nine SVGs from Sun–Fri to Mon–Sat. All other SVG content is unchanged, and the other 179 previews are byte-identical. The generated manifest was refreshed by the generator.

Verification

• The strengthened existing regression test fails before the fix and passes afterward, all 20 preview tests pass.
• Chromium checks with Denver, Warsaw and UTC host timezones reproduce the old difference and confirm the pinned context reports UTC and the same weekday in each case.
• Reviewed the rendered before/after previews and checked all nine SVG differences are text-only.
• Maintained example builds pass.
• pnpm validate passes all 19 tasks, including 2,237 main tests, bundle policy, comparison provenance and all 188 preview checks.

No published source, dependencies, bundle budgets or CI jobs change. The existing CI classifier selects static validation only, with comparison and stress partitions disabled. No package release is needed.

Summary by CodeRabbit

• Improvements
  • Catalog previews now use the UTC time zone and the en-US locale. Dates and times in previews are therefore displayed consistently across environments, making it easier to compare preview results.
  • Preview assets have been updated to match the current catalog output.

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Latest commit: f3dfd92

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📥 Commits

Reviewing files that changed from the base of the PR and between 39869d8 and f3dfd92.

⛔ Files ignored due to path filters: 9

• benchmarks/conformance/previews/132-shadcn-tooltip-advanced.svg is excluded by !**/*.svg
• benchmarks/conformance/previews/190-shadcn-tooltip-default.svg is excluded by !**/*.svg
• benchmarks/conformance/previews/191-shadcn-tooltip-formatter.svg is excluded by !**/*.svg
• benchmarks/conformance/previews/192-shadcn-tooltip-icons.svg is excluded by !**/*.svg
• benchmarks/conformance/previews/193-shadcn-tooltip-indicator-line.svg is excluded by !**/*.svg
• benchmarks/conformance/previews/194-shadcn-tooltip-indicator-none.svg is excluded by !**/*.svg
• benchmarks/conformance/previews/195-shadcn-tooltip-label-custom.svg is excluded by !**/*.svg
• benchmarks/conformance/previews/196-shadcn-tooltip-label-formatter.svg is excluded by !**/*.svg
• benchmarks/conformance/previews/197-shadcn-tooltip-label-none.svg is excluded by !**/*.svg

📒 Files selected for processing: 3

• benchmarks/conformance/previews/manifest.json
• scripts/catalog-preview.mjs
• scripts/catalog-preview.test.mjs

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📝 Walkthrough

The catalog preview browser context now uses the UTC timezone, and its test checks that setting. The preview manifest has updated source and asset hashes; asset IDs and byte counts are unchanged.

Changes: Catalog preview timezone and manifest

Layer / File(s)	Summary
UTC preview context and refreshed manifest scripts/catalog-preview.mjs, scripts/catalog-preview.test.mjs, benchmarks/conformance/previews/manifest.json	The preview context sets the timezone to UTC, and the test checks it alongside locale en-US. The manifest has updated source and asset hashes; asset IDs and byte counts remain unchanged.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~5 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to f3dfd

Catalog previews now use UTC, and the refreshed manifest matches the checked-in preview assets. No actionable merge risk remains.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files. (1 skipped: 1 …	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: removing host-timezone dependence from catalog previews.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files. (1 skipped: 1 unsupported.)

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[nx-cloud]

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☁️ Nx Cloud last updated this comment at 2026-10-14 11:22:37 UTC