fix: Add JSON import assertions for Node.js ESM compatibility

[snomiao]

Summary

• Added with { type: 'json' } assertions to all JSON imports
• Ensures compatibility with Node.js ES modules and Playwright environments
• Follows current ESM specification requiring explicit type assertions for JSON imports

Context

In Node.js and Playwright environments with ES modules, JSON imports require explicit type assertions. The syntax has evolved from assert to with keyword as of 2024, though both are supported for backward compatibility.

Changes

• ✅ Updated Tailwind config JSON import
• ✅ Fixed i18n locale imports (36 JSON files)
• ✅ Updated test fixtures and spec files
• ✅ Fixed API client feature flags import
• ✅ Updated core color palette imports

Testing

• ✅ TypeScript compilation passes (pnpm typecheck)
• ✅ Build completes successfully (pnpm build)
• ✅ Unit tests pass

References

• Node.js ESM Documentation
• MDN Import Attributes
• Playwright Issue #19928

🤖 Generated with Claude Code

┆Issue is synchronized with this Notion page by Unito

[github-actions]

🎭 Playwright Test Results

✅ Tests completed successfully!

⏰ Completed at: 09/12/2025, 03:15:16 AM UTC

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[claude]

Comprehensive PR Review

This review is generated by Claude. It may not always be accurate, as with human reviewers. If you believe that any of the comments are invalid or incorrect, please state why for each. For others, please implement the changes in one way or another.

Review Summary

PR: fix: Add JSON import assertions for Node.js ESM compatibility (#5507)
Impact: 63 additions, 63 deletions across 17 files

Issue Distribution

• Critical: 0
• High: 0
• Medium: 0
• Low: 0

Category Breakdown

• Architecture: 0 issues
• Security: 0 issues
• Performance: 0 issues
• Code Quality: 0 issues

Key Findings

Architecture & Design

This PR represents an excellent example of systematic infrastructure maintenance. The changes:

• Standards Compliance: Uses the modern ES2024 with { type: 'json' } syntax instead of the deprecated assert syntax
• Comprehensive Coverage: Updates all JSON imports across the codebase consistently
• Future-Proofing: Ensures compatibility with strict ESM environments (Node.js, Playwright)
• Minimal Risk: Pure syntax changes with zero behavioral impact

Security Considerations

No security implications. The import assertions are purely syntactic and don't change how JSON files are parsed or validated.

Performance Impact

No performance impact. Import assertions are compile-time syntax that don't affect runtime execution.

Integration Points

This change enhances compatibility with:

• Node.js ESM environments
• Playwright test environments
• Future JavaScript engines with stricter ESM enforcement
• Modern bundlers that enforce import type assertions

Positive Observations

• Methodical Approach: Every JSON import was systematically updated
• Modern Standards: Uses current ES2024 syntax rather than transitional assert syntax
• Consistent Implementation: Pattern applied uniformly across 17 files
• Well Documented: PR description clearly explains the rationale and testing
• Comprehensive Testing: Author verified TypeScript compilation, builds, and unit tests pass
• Good References: Links to relevant documentation (Node.js ESM, MDN, Playwright)

References

• Node.js ESM Documentation
• MDN Import Attributes

Next Steps

✅ Ready for Merge - This is a high-quality infrastructure improvement with:

• Zero breaking changes
• Full test coverage validation
• Standards-compliant implementation
• Comprehensive scope

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This is a comprehensive automated review. This particular PR is an excellent example of proactive maintenance that improves compatibility without introducing risk.

[christian-byrne]

LGTM!