User management dropdown alignment

[ericokuma]

Addresses APP-669 by implementing a viewport-aware dropdown alignment strategy for the User Management table. This ensures dropdowns default to left-alignment, switch to right-alignment to prevent overflow near the viewport edge, and removes all center-aligned dropdowns. The 3-dot actions menu is now consistently right-aligned.

Checklist:

• Covered by tests
• Ran it and it works as intended
• Reviewed the diff before requesting a review
• Checked for unhandled edge cases
• Linked the issues it closes
• Checked if the docs need to be updated. If so, create a separate Linear DOCS issue
• Intend to cherry-pick into the release branch
• I'm proud of this work!

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Linear Issue: APP-669

 

[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
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