L3: sibling dashboard hooks (analytics/location-coef/placement-history/
sell-time) now short-circuit once restore-by-id confirms 404, instead
of each firing their own doomed request against the same dead
estimate id.
L5: dimmed non-interactive user-menu items (Профиль/Настройки/Помощь)
get a hover title explaining why they're disabled.
L7: TopNav logo subtitle used a stale literal #6f8195 predating the
C1 contrast sweep; now references tokens.muted.
M12: HistoryView's "ДКП-сделки" card gets the same one-time ДКП decode
convention ObjectSummary already uses.
H2/M8/M9/M10/M11 re-verified live/by-code — already correct, no
changes needed (see issue comment). L4 (HistoryView outlier clamp)
and L6 (blueprint-grid background-image) left as follow-ups
(mapper-level change / no contrast payoff respectively).
Refs #2081
