- Move blocking usage queries and core lifecycle operations to background
workers, limit concurrency, and prevent overlapping core operations
- Coalesce statistics refreshes and consolidate category aggregations,
reducing unfiltered analysis queries from 11 to 4
- Cache bundled model prices, reuse management API connections, and reduce
redundant checks in the usage collector
- Throttle download progress and guide positioning updates, and avoid
redundant renders when core status is unchanged
- Bound and coalesce configuration watcher events, and reuse a single
model catalog refresh worker
- Stop scheduling remaining health checks when the dialog closes and
limit backend health-check concurrency
- Replace overlapping OAuth polling with sequential requests, retry
backoff, timeouts, and stale callback protection
- Add regression tests and a statistics benchmark script, and move
performance verification documentation to agent_docs
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