The fact that you got a syntax error at all is pretty telling. Are you not using agent mode? Or maybe that's just the experience with inferior non-statically typed languages where such errors only appear when the application is run. In any case, the key is to have a feedback mechanism. Claude should read the syntax errors, adjust and iterate until the error is fixed. Similarly, you should ask Claude to write a test for your landscape/portrait mode bug and have it make changes until the test passes.