Add complete item collection system (v0.2.0)

🎒 Item Collection System:
- 16 unique items across 5 categories (healing, battle, rare, location, special)
- Rarity tiers: Common, Uncommon, Rare, Epic, Legendary with symbols
- 30% chance to find items during exploration
- Location-specific items (shells, mushrooms, crystals, runes)
- Inventory management with \!inventory and \!use commands
- Web interface integration showing player inventories
- Consumable items: healing potions, battle boosters, lucky charms

🔧 Technical Updates:
- Added items and player_inventory database tables
- New Inventory module for item management
- Updated game engine with item discovery system
- Enhanced web interface with inventory display
- Item initialization from config/items.json

🆕 New Commands:
- \!inventory / \!inv / \!items - View collected items by category
- \!use <item name> - Use consumable items on active pets

🤖 Generated with [Claude Code](https://claude.ai/code)

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

webserver.py

@@ -928,10 +928,28 @@ class PetBotRequestHandler(BaseHTTPRequestHandler):
                     }
                     achievements.append(achievement_dict)
                 
+                # Get player inventory
+                cursor = await db.execute("""
+                    SELECT i.name, i.description, i.category, i.rarity, pi.quantity
+                    FROM player_inventory pi
+                    JOIN items i ON pi.item_id = i.id
+                    WHERE pi.player_id = ?
+                    ORDER BY i.rarity DESC, i.name ASC
+                """, (player_dict['id'],))
+                inventory_rows = await cursor.fetchall()
+                inventory = []
+                for row in inventory_rows:
+                    item_dict = {
+                        'name': row[0], 'description': row[1], 'category': row[2],
+                        'rarity': row[3], 'quantity': row[4]
+                    }
+                    inventory.append(item_dict)
+                
                 return {
                     'player': player_dict,
                     'pets': pets,
-                    'achievements': achievements
+                    'achievements': achievements,
+                    'inventory': inventory
                 }
                 
         except Exception as e:
@@ -1087,6 +1105,7 @@ class PetBotRequestHandler(BaseHTTPRequestHandler):
         player = player_data['player']
         pets = player_data['pets']
         achievements = player_data['achievements']
+        inventory = player_data.get('inventory', [])
         
         # Calculate stats
         active_pets = [pet for pet in pets if pet['is_active']]
@@ -1139,6 +1158,41 @@ class PetBotRequestHandler(BaseHTTPRequestHandler):
                     No achievements yet. Keep exploring and catching pets to earn achievements!
                 </div>"""
         
+        # Build inventory HTML
+        inventory_html = ""
+        if inventory:
+            rarity_symbols = {
+                "common": "○",
+                "uncommon": "◇", 
+                "rare": "◆",
+                "epic": "★",
+                "legendary": "✦"
+            }
+            rarity_colors = {
+                "common": "#ffffff",
+                "uncommon": "#1eff00", 
+                "rare": "#0070dd",
+                "epic": "#a335ee",
+                "legendary": "#ff8000"
+            }
+            
+            for item in inventory:
+                symbol = rarity_symbols.get(item['rarity'], "○")
+                color = rarity_colors.get(item['rarity'], "#ffffff")
+                quantity_str = f" x{item['quantity']}" if item['quantity'] > 1 else ""
+                
+                inventory_html += f"""
+                <div style="background: var(--bg-tertiary); padding: 15px; border-radius: 8px; margin: 10px 0; border-left: 4px solid {color};">
+                    <strong style="color: {color};">{symbol} {item['name']}{quantity_str}</strong><br>
+                    <small>{item['description']}</small><br>
+                    <em style="color: var(--text-secondary);">Category: {item['category'].replace('_', ' ').title()} | Rarity: {item['rarity'].title()}</em>
+                </div>"""
+        else:
+            inventory_html = """
+                <div style="text-align: center; padding: 40px; color: var(--text-secondary);">
+                    No items yet. Try exploring to find useful items!
+                </div>"""
+        
         html = f"""<!DOCTYPE html>
 <html lang="en">
 <head>
@@ -1359,6 +1413,13 @@ class PetBotRequestHandler(BaseHTTPRequestHandler):
             {achievements_html}
         </div>
     </div>
+    
+    <div class="section">
+        <div class="section-header">🎒 Inventory</div>
+        <div class="section-content">
+            {inventory_html}
+        </div>
+    </div>
 </body>
 </html>"""