feat: implement comprehensive combat system with plugin architecture

- Complete combat system with instant, turn-based, and tactical combat
- Plugin-based architecture with CombatPluginManager for extensibility
- Real-time combat events via WebSocket
- Fleet vs fleet and fleet vs colony combat support
- Comprehensive combat statistics and history tracking
- Admin panel for combat management and configuration
- Database migrations for combat tables and fleet system
- Complete test suite for combat functionality
- Combat middleware for validation and logging
- Service locator pattern for dependency management

Combat system features:
• Multiple combat resolution types with plugin support
• Real-time combat events and spectator support
• Detailed combat logs and casualty calculations
• Experience gain and veterancy system for ships
• Fleet positioning and tactical formations
• Combat configurations and modifiers
• Queue system for battle processing
• Comprehensive admin controls and monitoring

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

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

src/routes/api.js

@@ -39,7 +39,8 @@ router.get('/', (req, res) => {
                 colonies: '/api/colonies',
                 fleets: '/api/fleets',
                 research: '/api/research',
-                galaxy: '/api/galaxy'
+                galaxy: '/api/galaxy',
+                combat: '/api/combat'
             }
         }
     });
@@ -162,6 +163,12 @@ playerRoutes.put('/notifications/read',
 // Mount player routes
 router.use('/player', playerRoutes);
 
+/**
+ * Combat Routes
+ * /api/combat/*
+ */
+router.use('/combat', require('./api/combat'));
+
 /**
  * Game Feature Routes
  * These will be expanded with actual game functionality