Build effect cost maps from PowActionCostInfo.cfg

PowersManager._effect_costMaps now comes from PowActionCostTemplate
instead of static_effect_costmaps. Parity (scripts/p45.py, dev DB):
524/524 ids, 522 identical. Value changes, cfg wins (D2, user
decision 2026-10-26):
- PRE-092 Yglandor: Sulfur 1 -> 6
- PRE-097 Jagged: adds Sulfur 1

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

src/engine/gameManager/PowersManager.java

@@ -28,6 +28,7 @@ import engine.net.Dispatch;
 import engine.net.client.ClientConnection;
 import engine.net.client.msg.*;
 import engine.objects.*;
+import engine.parsers.objects.wpak.PowActionCostTemplate;
 import engine.parsers.objects.wpak.PowerTemplate;
 import engine.powers.*;
 import engine.powers.poweractions.AbstractPowerAction;
@@ -94,6 +95,14 @@ public enum PowersManager {
         return PowersManager.effectsBaseByToken.get(token);
     }
 
+    public static void loadEffectCostMaps() {
+
+        for (PowActionCostTemplate costTemplate : PowActionCostTemplate._costs.values())
+            PowersManager._effect_costMaps.put(costTemplate.id, new HashMap<>(costTemplate.costs));
+
+        Logger.info("Loaded " + PowersManager._effect_costMaps.size() + " effect cost maps from PowActionCostInfo.cfg");
+    }
+
     // Powers.cfg target type wins over static_power_powerbase
     private static void applyClientTargetTypes() {