fix(cli): fix mcp arg parsing.

Author: Davidyz

src/vectorcode/mcp_main.py

@@ -196,7 +196,7 @@ async def mcp_server():
 
 def parse_cli_args(args: Optional[list[str]] = None) -> MCPConfig:
     parser = get_arg_parser()
-    parsed_args = parser.parse_args(args or sys.argv)
+    parsed_args = parser.parse_args(args or sys.argv[1:])
     return MCPConfig(n_results=parsed_args.number, ls_on_start=parsed_args.ls_on_start)