100: Add Perps collateral, leverage, value, uPnL and gross-exposure totals in EMC

docs/PhoenixPerps.md

@@ -79,7 +79,9 @@ Each Evelyn process performs an initial background refresh, then waits 60 second
 following each completed cycle. Jupiter and Phoenix are attempted independently for
 each configured wallet. Successful results replace only that wallet/venue; failures
 log wallet and venue and retain its last successful result. A valid empty result
-replaces that venue's positions and account balances, preserving its group.
+replaces that venue's positions and account balances. EMC hides the venue heading
+when it has neither position rows nor Cross accounts; its read status remains in
+the wallet tooltip and the scope still contributes to snapshot totals.
 Funded Cross accounts remain visible when they no longer hold positions. Snapshot reads never fetch
 external data; EMC's three-second polling remains unchanged.
 
@@ -87,10 +89,10 @@ Positions and prices are separate REST reads and can belong to different slots.
 This is a periodic current-notional estimate, not an atomic exchange valuation.
 A cycle's duration includes all sequential reads and request pacing before the
 60-second pause (32 active markets need at least about 33 seconds for their reads). Failed
-reads can leave old data visible indefinitely. The venue now shows `(retained)` after
-a failed refresh, or `(unavailable)` before any successful read; cell tooltips include
-the last-success time. Initial not-yet-read scopes show `(loading)` and cannot contribute
-fabricated zero totals.
+reads can leave old data visible indefinitely. A visible venue shows `(retained)` after
+a failed refresh; cell tooltips include the last-success time. Childless venues are hidden,
+with failed or pending first-read status available in their wallet's tooltip. Such unknown
+scopes cannot contribute fabricated zero totals.
 Trader PDA indices other than 0, streaming and position management are out of scope.