fix(app): resolve model cache bug and Gradio 6 launch warnings

fix(deps): restore torch in requirements for Space runtime

chore(space): align Space config with HF Spaces best practices

perf(app): refactor Gradio UI and optimize model loading

feat(app): add new models with lazy loading and OpenAlex input

build(deps): eliminar Gradio de requirements per compatibilitat amb HF Spaces

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Upgrade gradio

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