END-1: the base can be lost - a losable Engine Core with integrity

Adds CoreIntegrity{[GhostField] Current,Max,OverrunTick} on the GLOBAL
CycleDirector ghost (no new ghost/relevancy). CoreDamageSystem (server,
after EnemyAISystem): a Husk within ~3u of PlotCenter drains + is consumed;
CoreRestoreSystem regenerates only in Calm. The SOFT-loss edge lives inside
CyclePhaseSystem (sole Phase writer): Current<=0 in Siege flips to Calm with
NO goal reward, StorageMath.DrainFraction drains the shared ledger, all Husks
despawn, and OverrunTick is stamped (a transient HUD-flash pulse, not a
latching outcome - the Victory latch is END-2's). EnemyAISystem treats the
Core as a FALLBACK target so an undefended base is overrun instead of idling.
SaveData -> v4 persists CoreCurrent (0 -> born full, the EB-1 HP sentinel);
3 live TuningConfig knobs + a red HUD Core bar. Soft-loss + targeting +
breach-resolution forks operator-locked.

See DR-034.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/_Project/Scripts/Simulation/Persistence/SaveComponents.cs

@@ -15,6 +15,9 @@ namespace ProjectM.Simulation
         public int GoalCharge;
         public int GoalTarget;
 
+        /// <summary>END-1: Engine Core integrity to restore (0 = pre-v4 save / New Game -> born full at baked Max).</summary>
+        public int CoreCurrent;
+
         /// <summary>0 = nothing staged (New Game); non-zero = apply the staged slice at director spawn.</summary>
         public byte HasData;
     }

Assets/_Project/Scripts/Simulation/Persistence/SaveData.cs

@@ -51,7 +51,7 @@ namespace ProjectM.Simulation
     [Serializable]
     public class SaveData
     {
-        public const int CurrentVersion = 3; // EB-1: v3 adds StructureSave.HP
+        public const int CurrentVersion = 4; // END-1: v4 adds CoreCurrent (a wounded base persists)
 
         /// <summary>Oldest save schema the loader accepts (additive); a v2 save loads with structures at full HP.</summary>
         public const int MinLoadableVersion = 2;
@@ -59,6 +59,8 @@ namespace ProjectM.Simulation
         public int Version = CurrentVersion;
         public int GoalCharge;
         public int GoalTarget;
+        public int CoreCurrent; // END-1: Engine Core integrity at save time (0 from a pre-v4 save -> restored to baked Max)
+
         public LedgerRow[] Ledger = Array.Empty<LedgerRow>();
         public StructureSave[] Structures = Array.Empty<StructureSave>();
         public StructureIoRow[] StructureIo = Array.Empty<StructureIoRow>();