chore(site): add missing .mjs extensions to imports

[alexicum]

Description

Two files import .mjs modules without the extension.
The rest of the project already uses extensions, including for #site/navigation.mjs and #site/next.constants.mjs.

Check List

• [x ] I have read the Contributing Guidelines and made commit messages that follow the guideline.
• [ x] I have run pnpm format to ensure the code follows the style guide.
• [ x] I have run pnpm test to check if all tests are passing.
• [ x] I have run pnpm build to check if the website builds without errors.
• I've covered new added functionality with unit tests if necessary.

[vercel]

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Project	Deployment	Actions	Updated
nodejs-org	Ready	Preview	Oct 17, 2026 10:54am UTC

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.15%. Comparing base (7c40136) to head (e6f0c5b).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9224      +/-   ##
==========================================
+ Coverage   86.13%   86.15%   +0.01%     
==========================================
  Files          86       86              
  Lines        6075     6075              
  Branches      360      360              
==========================================
+ Hits         5233     5234       +1     
+ Misses        838      837       -1     
  Partials        4        4              

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[github-actions]

📦 Build Size Comparison

Summary

Metric	Value
Old Total First Load JS	7.20 MB
New Total First Load JS	7.20 MB
Delta	0 B (0.00%)

[mikeesto]

LGTM, thanks

[alexicum]

@mikeesto Thank you!

[alexicum]

@mikeesto Thank you!