shad
a6198c3832
Close Oracle's two standing caveats so they can't gate a future loop:
1. Wizard dispatch label 'Person' was vague (Oracle: could imply chat
recipient, not work-routing). Now 'Manual review' in both dropdown
and preview-pane badge. dispatch_kind storage value unchanged
('human'/'agent'/'system' for EA2).
2. Chat unread cold-start. Topbar badge depended entirely on
localStorage being populated by Chat scene's first visit. Fresh
browser / private window / cleared storage saw 0 unread until then.
Added seedHeadsIfMissing in App.tsx topbar poll: on first refresh
(and only when localStorage heads count < thread count), fetches
last message per thread ONCE and persists to localStorage. Subsequent
ticks reuse the cache — same idle-poll budget (test still PASS).