- Added throttling and debouncing to HUD data rendering and observer UI synchronization to coalesce update bursts.
- Constrained the subagent HUD display to a maximum of 8 rows with a truncation notice for hidden sessions.
- Enhanced the session observer registry to categorize update types, enabling more granular UI reconciliation.
- Verified render coalescing and display truncation behavior with comprehensive integration tests using fake timers.
- Added no-op setters to process.stdout properties in test geometry stubs.
- Prevented potential errors when code under test attempts to reassign stdout dimensions.
- Sanitized newlines from agent hub display text to ensure single-line output.
- Enforced line clamping during render to prevent terminal wrapping.
- Added test coverage to verify output truncation and newline removal.
- Added a helper that renders hub output and extracts ordered agent IDs.
- Replaced positional string assertions with explicit row-order expectations.
- Awaited asynchronous theme initialization in test setup.
- Captured each row's initial position in AgentHubOverlayComponent on first refresh and reused it on later refreshes.
- Changed subsequent sorting to prioritize status then prior row position, so activity updates no longer reordered visible rows.
- Added a regression test that verifies row ordering stays stable when activity changes and new agents append at the end.
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