P06-03: Show Mana supply, consumption and storage; prove new-PID recovery

HUD tooltip reports world tree supply, upkeep consumption, net, stored amount
and the last boundary's shortage/overflow. A writer/reader pair saves mid-outage,
recovers in a new process and matches the writer exactly while DESTROYED and
RAIDED suspensions stay in place.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

autoload/simulation_runtime.gd

@@ -10741,6 +10741,20 @@ func _reservation_references_are_valid(
 			return false
 	return true
 
+## HUD view of the A06 reserve: supply, consumption and storage per interval.
+func get_mana_reserve_report() -> Dictionary:
+	var demand := _mana_reserve_demand()
+	return {
+		&"amount": int(_state.get_resource(&"mana")),
+		&"capacity": ManaReserveCycle.CAPACITY,
+		&"generation": ManaReserveCycle.WORLD_TREE_GENERATION,
+		&"interval_minutes": ManaReserveCycle.INTERVAL_MINUTES,
+		&"demand": demand,
+		&"net": ManaReserveCycle.WORLD_TREE_GENERATION - demand,
+		&"last_flow": mana_reserve.get_last_flow(),
+	}
+
+
 ## A06 upkeep demand: every owned consumer, open or not, except destroyed
 ## facilities. Removed facilities are already unregistered from the network.
 func _mana_reserve_demand() -> int: