## What
When the unified logs preview is enabled, clicking a chart bar that
links to a logs view now opens **unified logs** (scoped to the service
and time bucket) instead of the legacy logs explorer.
Surfaces updated:
- Homepage project usage charts (`ProjectUsageSectionDeltas`,
`ProjectUsageSection`)
- Observability overview service health table (`ObservabilityOverview`)
— also fixes the API Gateway row and passes the time range via the
`date` param unified logs actually reads
Adds a small `buildUnifiedLogsUrl` helper so the deep-link format
(`filter=log_type:eq:<type>` + `date` epoch-ms range) lives in one
place.
When the preview is off, behavior is unchanged (legacy logs explorer).
Resolves O11Y-2133.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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## Summary by CodeRabbit
* **New Features**
* Added unified logs navigation for project usage and observability
charts.
* Chart bar clicks now open the unified logs view with service-specific
filtering and a computed time window.
* **Bug Fixes**
* Updated observability and usage charts to generate the correct unified
logs URLs (including `log_type` filtering and optional date ranges).
* Preserved legacy log navigation behavior when unified logs are
disabled.
* **Tests**
* Added unit tests covering unified logs URL generation, query
parameters, and date handling.
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Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
