Minor improvements

src/services/characterMoveService.ts

@@ -29,6 +29,7 @@ class CharacterMoveService extends BaseService {
       return null
     }
 
+    // Ensure we're working with valid coordinates
     const start: Position = {
       positionX: Math.floor(character.positionX),
       positionY: Math.floor(character.positionY)
@@ -39,6 +40,11 @@ class CharacterMoveService extends BaseService {
       positionY: Math.floor(targetY)
     }
 
+    // Don't calculate path if start and end are the same
+    if (start.positionX === end.positionX && start.positionY === end.positionY) {
+      return null
+    }
+
     return this.findPath(start, end, grid)
   }