[Bug] draw() API returns None instead of circuit visualization object

[shiavm006]

QuMat.draw() says it returns a circuit visualization, but all backends just print the circuit and return None. So viz = qumat.draw() always gives you None.

Steps to Reproduce

1. Create a simple circuit with QuMat (e.g., 1-qubit Hadamard).
2. Call viz = qumat.draw().
3. Check viz in Python.

Expected Behavior

draw() should either return something you can use (string/object) or clearly say it only prints and returns nothing.

Actual Behavior

The circuit is printed to stdout, and viz is always None.

viz = qumat.draw() circuit is printed here print(viz) None### Environment

• OS: Any
• Python Version: 3.10+
• Mahout/Qumat Version: main
• Backends: Qiskit, Cirq, Amazon Braket

Additional Context

Right now the docstring and the actual behavior don’t match, which is confusing if you try to use the return value.