Task 2: Fix Combat UI Casting Bar progress animation

src/lib/game/utils/combat-utils.ts

@@ -221,13 +221,19 @@ export function deductSpellCost(
 
 // ─── Equipment Spell Helpers ──────────────────────────────────────────────────
 
+// Return type for active equipment spells with source equipment
+export interface ActiveEquipmentSpell {
+  spellId: string;
+  equipmentId: string;
+}
+
 // Get active spells from equipped equipment
 export function getActiveEquipmentSpells(
   equippedInstances: Record<string, string | null>,
   equipmentInstances: Record<string, EquipmentInstance>
-): string[] {
+): ActiveEquipmentSpell[] {
   const equippedIds = Object.values(equippedInstances).filter((id): id is string => id !== null);
-  const spells: string[] = [];
+  const spells: ActiveEquipmentSpell[] = [];
   
   for (const id of equippedIds) {
     const instance = equipmentInstances[id];
@@ -236,12 +242,16 @@ export function getActiveEquipmentSpells(
     for (const ench of instance.enchantments) {
       const effectDef = ENCHANTMENT_EFFECTS[ench.effectId];
       if (effectDef?.effect.type === 'spell' && effectDef.effect.spellId) {
-        spells.push(effectDef.effect.spellId);
+        // Check if we already have this spell from this equipment
+        const exists = spells.some(s => s.spellId === effectDef.effect.spellId && s.equipmentId === id);
+        if (!exists) {
+          spells.push({ spellId: effectDef.effect.spellId, equipmentId: id });
+        }
       }
     }
   }
   
-  return [...new Set(spells)];
+  return spells;
 }
 
 // ─── DPS Calculation ──────────────────────────────────────────────────────────
@@ -258,7 +268,7 @@ export function getTotalDPS(
   const activeSpells = getActiveEquipmentSpells(state.equippedInstances, state.equipmentInstances);
   
   // Calculate DPS for each active spell
-  for (const spellId of activeSpells) {
+  for (const { spellId } of activeSpells) {
     const spellDef = SPELLS_DEF[spellId];
     if (!spellDef) continue;