refactor: Move balance tool classes to standard package structure (Package-by-Layer)

fix_mcptool.py

@@ -0,0 +1,24 @@
+import os
+import re
+
+pattern = re.compile(r'name\s*=\s*"[^"]*",\s*description\s*=\s*"[^"]*",\s*group\s*=\s*"[^"]*",?\s*')
+
+for root, _, files in os.walk('.'):
+    for f in files:
+        if f.endswith('.java'):
+            p = os.path.join(root, f)
+            try:
+                content = open(p, encoding='utf-8').read()
+            except Exception:
+                content = open(p, encoding='cp949').read()
+                
+            new_content = pattern.sub('', content)
+            
+            # Clean up empty parens like @McpTool()
+            new_content = new_content.replace('@McpTool(\n    \n)', '@McpTool')
+            new_content = new_content.replace('@McpTool()', '@McpTool')
+            
+            if content != new_content:
+                with open(p, 'w', encoding='utf-8') as out:
+                    out.write(new_content)
+                print(f"Updated {p}")