[Feature] UI - Logs: Adding Error message search to ui spend logs

[yuneng-jiang]

Relevant issues

Pre-Submission checklist

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• I have Added testing in the tests/litellm/ directory, Adding at least 1 test is a hard requirement - see details
• My PR passes all unit tests on make test-unit
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• 50-55 passing tests: main is stable with minor issues.
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Type

🆕 New Feature
✅ Test

Changes

Adds error message filter to the UI spend logs page, allowing users to filter logs by error message through the filter component.

Screenshots

[vercel]

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Project	Deployment	Review	Updated (UTC)
litellm	Error		Jan 29, 2026 0:05am