feat: Implement attunement mana conversion

- Add auto-conversion of raw mana to primary mana types in tick
- Each attunement converts raw mana at its defined rate
- Conversion scales with attunement level (+10% per level)
- Update state in tick to track primaryMana changes

src/lib/game/store.ts

@@ -467,6 +467,35 @@ export const useGameStore = create<GameStore>()(
         // Increment total ticks early (needed for study tracking)
         const newTotalTicks = state.totalTicks + 1;
 
+        // ─── Attunement Mana Conversion ───
+        // Auto-convert raw mana to primary mana types based on unlocked attunements
+        let primaryMana = { ...state.primaryMana };
+        const attunements = state.attunements;
+        
+        for (const [attunementType, attunementState] of Object.entries(attunements)) {
+          if (!attunementState.unlocked) continue;
+          
+          const def = ATTUNEMENTS[attunementType as AttunementType];
+          if (!def || !def.primaryManaType) continue;  // Skip Invoker (no primary)
+          
+          const manaType = def.primaryManaType;
+          const currentPrimary = primaryMana[manaType] || 0;
+          const maxPrimary = state.primaryManaMax[manaType] || 50;
+          
+          if (currentPrimary >= maxPrimary) continue;  // Already at max
+          
+          // Calculate conversion: autoConvertRate per hour, scaled by level
+          const conversionRate = def.autoConvertRate * (1 + attunementState.level * 0.1);
+          const conversionAmount = conversionRate * HOURS_PER_TICK;
+          
+          // Convert from raw mana (costs 1 raw per 1 primary)
+          if (rawMana >= conversionAmount) {
+            const actualConvert = Math.min(conversionAmount, maxPrimary - currentPrimary);
+            rawMana -= actualConvert;
+            primaryMana[manaType] = Math.min(currentPrimary + actualConvert, maxPrimary);
+          }
+        }
+
         // Study progress
         let currentStudyTarget = state.currentStudyTarget;
         let skills = state.skills;
@@ -937,6 +966,7 @@ export const useGameStore = create<GameStore>()(
             achievements,
             totalDamageDealt,
             totalSpellsCast,
+            primaryMana,
         });
           return;
         }
@@ -970,6 +1000,7 @@ export const useGameStore = create<GameStore>()(
           consecutiveStudyHours,
           studyStartedAt,
           lastStudyCost,
+          primaryMana,
           ...craftingUpdates,
         });
       },