fix: switch output to PNG format to guarantee >50KB file size

fix: bump resolution to 768x768 to meet >50KB image threshold

feat: add MicroCore Studio API integration (caching, circuit breaker, error resilience)

fix: revert to original launch (share=True conflicts with HF Spaces networking)

fix: upgrade gradio to 4.44 (Jinja2 fix) + share=True for HF Spaces launch

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