fix(chat): show hours for long runs - #9894

💭 Checking which changed files fall in scope: the mobile and web tsx files are excluded, but session-logic.ts and orchestrationTiming.ts are relevant to review since they involve formatDuration logic. session-logic.ts adds a re-export shim for formatDuration and formatElapsed from the shared package. The convention against compatibility re-export shims applies to Effect services being moved, and these are pure helper functions rather than services, so this likely isn't a real finding. Still, I want to check orchestrationTiming.ts fully to confirm there's nothing Effect-related I'm missing.

1. browse_code — packages/shared/src/orchestrationTiming.ts

2. browse_code — apps/web/src/session-logic.ts

💭 No Effect services are involved here, just a pure helper being deduplicated, and the re-export shim rule only applies to services, not formatDuration. This means there's nothing to flag, so I'll report all clear, making sure my summary field meets the minimum character requirement.