luash shell first

luash

@@ -302,14 +302,14 @@ end
 
 -- 1. Check for an input file or REPL mode
 local filename = arg[1]
-if not filename then
+
+if filename == "-h" or filename == "--help" then
   print("Usage: luash <script.luash>")
   print("       luash -i  # Interactive mode")
+  print("       luash -h  # Show this help")
   return
-elseif filename == "-i" or filename == "--interactive" then
-  -- Start interactive REPL (defined below)
+elseif not filename or filename == "-i" or filename == "--interactive" then
   start_repl()
-  return
 end
 
 local file = io.open(filename, "r")