Add shared time formatting helpers that apply the Appearance time format preference consistently. Update visible time labels across chat, quota usage, scheduled tasks, tunnels, context details, git views, PR metadata, and passkey settings to use the selected 12-hour, 24-hour, or automatic format. Leave date-only and non-UI formatting untouched so unrelated behavior does not change.
Add a new Chat checkbox to toggle timestamps for tool, reasoning, and justification headers (default off).
Keep assistant message footer timestamps visible and switch to a more readable compact date format.
Preserve hover timestamp overlays with chat-surface background when the new setting is enabled.
* feat(chat): add shared activity timestamp formatter
* feat(chat): pass assistant created timestamp to message body
* feat(chat): render footer timestamp beside elapsed time
* feat(chat): pass timing metadata in reasoning text blocks
* feat(chat): propagate justification timing to timeline block
* feat(chat): show thinking duration with hover end time
* feat(chat): reveal tool end time on activity hover
Bohdan Triapitsyn