gauge wave P1b: Searchlight/LightOn + fix coolant/refrigeration source misread

- Searchlight publishes "LightOn" -> lightState@0x1D8 (the button-5 searchlight
  lamp; the empty default-constructed index resolved NOTHING).  The config binds
  the name "LightOn", so the enum id is renamed LightOnAttributeID and the table
  is chained to PowerWatcher's dense index.  Verified: LightOn resolves OK.

- FIX a genuine reconstruction bug the heatmodel decode caught (heat.cpp
  UpdateCoolant + heatfamily_reslice RefrigerationSimulation): both read
  linkedSinks.Resolve()->heatEnergy where the binary reads *(this[0x38]+0x158) =
  the subsystem's OWN DamageZone.damageLevel (the engine base zone @0xE0).
  Consequences of the misread: coolantDraw = master.heatEnergy(~1.3e7) * heatLoad
  would SLAM the live CoolantMass bars to empty whenever the link resolved; and
  RefrigerationSimulation clamped massScale permanently to 1.0 (minimum) instead
  of the authentic 3.0, plus null-deref'd a Condenser whose linkedSinks is skipped.
  Now both read this->Subsystem::damageZone->damageLevel (qualified past the
  MechSubsystem shadow, per mechweap.cpp:252): undamaged 0 -> coolantDraw 0 (no
  leak, coolant bars stay full = authentic pristine) / massScale = 3.0, rising
  only as the sink/condenser itself takes battle damage.

After this only HeatSink/AmbientTemperature remains NULL (the #if 0'd aggregate
HeatSink bank -> P3).  Verified DBASE+dev gauges: no crash, combat un-regressed
(TARGET DESTROYED).  (Also noted: the Condenser dup-ctor links to the REAL
heatfamily_reslice definition -- LNK4006 keeps the first/real one; the heat.cpp
stub is ignored -- so no bug today; #if 0 cleanup deferred to the Condenser table.)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

game/reconstructed/heat.cpp

@@ -753,11 +753,19 @@ void
 void
 	HeatSink::UpdateCoolant(Scalar time_slice)
 {
-	HeatSink *master = (HeatSink *)linkedSinks.Resolve();	// this[0x38] linked master
+	// AUTHENTIC (heatmodel decode, FUN_004adbf8): the binary reads *(this[0x38]+0x158)
-	// NULL-master guard (reconstruction omission -- the sibling ConductHeat/BalanceCoolant
+	// = this subsystem's OWN DamageZone.damageLevel (the engine base zone at @0xE0,
-	// guard this same Resolve(); UpdateCoolant didn't, so a Condenser/Reservoir with no
+	// word 0x38), NOT linkedSinks->heatEnergy.  The earlier reconstruction confused
-	// linked master null-deref'd here on its first tick). No master -> no coolant draw.
+	// word 0x38/@0xE0 (the DamageZone) with linkedSinks@0x164, so when the link
-	coolantDraw = master ? master->heatEnergy * heatLoad : 0.0f;	// *(this[0x38]+0x158) * this[0x48]
+	// resolved (heatEnergy ~1.3e7) coolantDraw became ~2e6 and would SLAM coolantLevel
+	// to empty every frame -- the opposite of the authentic near-static behavior.
+	// An undamaged subsystem has damageLevel 0 -> coolantDraw 0 -> NO leak (the coolant
+	// bars stay full on a pristine mech); the draw rises only as the heat sink /
+	// condenser itself takes battle damage.  (Read the qualified engine zone -- the
+	// nearer MechSubsystem::damageZone is a shim SHADOW; see mechweap.cpp:252.)
+	::DamageZone *ownZone = this->Subsystem::damageZone;	// @0xE0 (word 0x38)
+	Scalar zoneDamage = (ownZone != 0) ? ownZone->damageLevel : 0.0f;	// +0x158
+	coolantDraw = zoneDamage * heatLoad;					// *(this[0x38]+0x158) * this[0x48]
 	if (coolantDraw < CoolantDrawEpsilon)
 	{
 		coolantDraw = 0.0f;

game/reconstructed/heatfamily_reslice.cpp

@@ -122,9 +122,17 @@ Logical
 void
 	Condenser::RefrigerationSimulation(Scalar time_slice)	// FUN_004ae4d8
 {
-	HeatSink *master = (HeatSink *)linkedSinks.Resolve();	// this[0x38]
+	// AUTHENTIC (heatmodel decode): massScale = clamp>=1( (1 - ownDamageZone.damageLevel)
+	// * refrigerationFactor ).  The binary reads *(this[0x38]+0x158) = this condenser's
+	// OWN DamageZone.damageLevel (the engine base zone @0xE0, word 0x38): undamaged 0 ->
+	// massScale = refrigerationFactor (3.0), degrading toward 1.0 as the condenser is
+	// damaged.  The earlier recon read linkedSinks->heatEnergy (~1.3e7) -> (1 - 1.3e7)
+	// clamps massScale permanently to 1.0 (minimum refrigeration) AND null-derefs a
+	// Condenser whose linkedSinks is skipped (the ctor guard).
+	::DamageZone *ownZone = this->Subsystem::damageZone;	// @0xE0 (word 0x38)
+	Scalar zoneDamage = (ownZone != 0) ? ownZone->damageLevel : 0.0f;	// +0x158
 	massScale =									// refrigeration output reuses massScale @0x160 (word 0x58)
-		(1.0f - master->heatEnergy)				// _DAT_004ae530 = 1.0f ; master +0x158
+		(1.0f - zoneDamage)						// _DAT_004ae530 = 1.0f ; own DamageZone +0x158
 		* refrigerationFactor;					// this[0x76]
 	if (massScale < 1.0f)						// _DAT_004ae530
 	{

game/reconstructed/searchlight.cpp

@@ -50,8 +50,21 @@ Derivation
 Receiver::MessageHandlerSet
 	Searchlight::MessageHandlers;		// includes { "ToggleLamp", &Searchlight::ToggleLamp } @00511210
 
+// gauge data-binding wave: publish "LightOn" -> lightState@0x1D8 (the button-5
+// searchlight lamp; the empty default-constructed index resolved NOTHING).
+// Chained to PowerWatcher's dense index.
+const Searchlight::IndexEntry
+	Searchlight::AttributePointers[]=				// @005111e0
+{
+	ATTRIBUTE_ENTRY(Searchlight, LightOn, lightState)	// @0x1D8 (reported on/off)
+};
+
 Searchlight::AttributeIndexSet
-	Searchlight::AttributeIndex;
+	Searchlight::AttributeIndex(
+		ELEMENTS(Searchlight::AttributePointers),
+		Searchlight::AttributePointers,
+		PowerWatcher::GetAttributeIndex()
+	);
 
 Searchlight::SharedData
 	Searchlight::DefaultData(			// @00511198

game/reconstructed/searchlight.hpp

@@ -104,7 +104,10 @@
 	//
 	public:
 		enum {
-			LightStateAttributeID = PowerWatcher::NextAttributeID,	// 5
+			// The cockpit button-5 lamp binds "Searchlight/LightOn" (L4GAUGE.CFG:5017);
+			// the published NAME must be "LightOn" for Find() to hit, bound to the
+			// reported on/off member lightState@0x1D8.
+			LightOnAttributeID = PowerWatcher::NextAttributeID,	// 5
 			NextAttributeID
 		};