[codex] add list content card bounds css vars

[zombieJ]

Summary

Expose the front notification card bounds on the list content element as CSS custom properties.

• Track the front notice bounds while calculating list positions.
• Write --notification-top and --notification-bottom onto .rc-notification-list-content.
• Normalize bottom placements so the variables still represent top-edge coordinates within the list content.
• Add a regression test for the emitted list content variables.

Validation

• npm test -- tests/index.test.tsx
• npm test
• npm run lint (passes with existing hook dependency warnings)
• npx tsc --noEmit

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Project	Deployment	Actions	Updated (UTC)
notification	Ready	Preview, Comment	Apr 29, 2026 10:13am

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/list-content-card-bounds-var

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.20%. Comparing base (ecadd8c) to head (3b8840d).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #387      +/-   ##
==========================================
+ Coverage   99.17%   99.20%   +0.02%     
==========================================
  Files          13       13              
  Lines        1336     1377      +41     
  Branches      178      185       +7     
==========================================
+ Hits         1325     1366      +41     
  Misses         11       11              

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[gemini-code-assist]

Code Review

This pull request introduces the tracking and exposure of the top notification's bounds within the notification list. It updates the useListPosition hook to calculate these bounds and passes them down to the Content component, which then sets --notification-top and --notification-bottom CSS variables. This includes logic to adjust coordinates for bottom-aligned placements and a new test case to verify the style application. I have no feedback to provide.