17ec55cb85
Remove ~126 lines of orphaned CSS from tile slim-down and old detail layout. Consolidate 4 duplicate duration formatters into shared elapsed()/fmtElapsed() helpers. Break 160-line Result handler into focused sub-functions. Implement real Hub.Shutdown() (was a no-op). Standardize agent error responses to JSON. Replace panic() in router init with error return. Extract magic numbers as named constants. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>