Swap an image example for one the model answers well

Size spaces.GPU durations from measured ZeroGPU timings; clearer codec error

Gradio 6 API fixes: buttons=[copy], theme/css on launch()

Add pure-PyTorch mamba_ssm stand-in so the StreamMind gate loads

Mage-VL demo: image + codec/frames video Q&A + proactive streaming gate

initial commit