When already viewing today, clicking Today now snaps the selected hour
to whatever hour would be default for the current wall-clock time
(same as a fresh visit to /vu); when viewing another date it still just
jumps to today while preserving the current hour, as before. The link's
href is built from the same todayTargetHour() decision as the click
handler, so right-click -> open in new tab lands on the same target
instead of following a stale href.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CbHcmjnqQPJZ1i2yoebmp5
Visiting the app with no hour in the URL previously always showed
Prime for today, since selectedHour was hardcoded in AppState. Now it
picks the hour whose band contains the visitor's local clock time.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01L3wxvz3mPXiHxkPB5JpnmD
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