Consolidate disenchanting into CraftingTab Prepare step (Bug 8)

- Add 'tags' field to EquipmentInstance type
- Modify Prepare step to show warning and different button text when item has enchantments
- Consolidate disenchanting into Prepare step (remove separate disenchant UI)
- After successful preparation, item receives 'Ready for Enchantment' tag
- Modify Apply step to only allow applying enchantments to items tagged 'Ready for Enchantment'
- Update subtask_6_progress.md and todo.md to mark Sub-Task 6 as completed

src/lib/game/crafting-slice.ts

@@ -422,8 +422,8 @@ export function createCraftingSlice(
       const instance = state.equipmentInstances[equipmentInstanceId];
       if (!instance) return false;
 
-      // Don't allow preparing enchanted items - they need to be disenchanted first
-      if (instance.enchantments.length > 0) return false;
+      // Don't allow preparing an item that's already prepared
+      if (instance.tags?.includes('Ready for Enchantment')) return false;
 
       const prepTime = calculatePrepTime(instance.totalCapacity);
       const manaCost = calculatePrepManaCost(instance.totalCapacity);
@@ -459,6 +459,11 @@ export function createCraftingSlice(
 
       if (!instance || !design) return false;
 
+      // Check if equipment is ready for enchantment
+      if (!instance.tags?.includes('Ready for Enchantment')) {
+        return false;
+      }
+
       // Check capacity
       if (instance.usedCapacity + design.totalCapacityUsed > instance.totalCapacity) {
         return false;
@@ -818,12 +823,35 @@ export function processCraftingTick(
       const manaCostPaid = prep.manaCostPaid + manaCost;
 
       if (progress >= prep.required) {
+        // Preparation complete - clear enchantments, add tag, and recover some mana
+        const instance = state.equipmentInstances[prep.equipmentInstanceId];
+        let totalRecovered = 0;
+        
+        if (instance) {
+          // Calculate mana recovery from disenchanting
+          const disenchantLevel = (state.skills as Record<string, number>).disenchanting || 0;
+          const recoveryRate = 0.1 + disenchantLevel * 0.2; // 10% base + 20% per level
+          for (const ench of instance.enchantments) {
+            totalRecovered += Math.floor(ench.actualCost * recoveryRate);
+          }
+        }
+        
         updates = {
           ...updates,
-          rawMana: rawMana - manaCost,
+          rawMana: rawMana - manaCost + totalRecovered,
           preparationProgress: null,
           currentAction: 'meditate',
-          log: ['✅ Equipment prepared for enchanting!', ...log],
+          equipmentInstances: instance ? {
+            ...state.equipmentInstances,
+            [instance.instanceId]: {
+              ...instance,
+              enchantments: [],
+              usedCapacity: 0,
+              rarity: 'common',
+              tags: [...(instance.tags || []), 'Ready for Enchantment'],
+            },
+          } : state.equipmentInstances,
+          log: [`✅ Equipment prepared for enchanting! Recovered ${totalRecovered} mana.`, ...log],
         };
       } else {
         updates = {