When the wallet is connected but the balance has quietly stopped refreshing — a busy
daemon can fail z_gettotalbalance without dropping the whole connection (only *both*
core RPCs failing 3x triggers a disconnect) — the old number sits on screen while the
node-status banner stays hidden. The Total Balance card now shows a small pill on its
status line ("Updated 2m ago", amber, escalating to red past 3 min) so the stale value
isn't silently trusted; hovering explains it and points at the node connection.
No refresh-path changes: WalletState::last_balance_update is already stamped only on a
successful fetch (network_refresh_service.cpp), so the badge reads it and computes age
against the same std::time clock via util::formatTimeAgoShort. The decision is a pure,
unit-tested helper (ui/staleness_badge.h::evaluateStalenessBadge, 45s/180s thresholds)
gated on connected so it never contradicts the banner.
Closes P2 (5/5). Build-clean; ctest 1/1 (adds testStalenessBadge).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
DanS
c7c3440a7b