feat: add Methodology & Results and How Attention Works tabs

fix: comprehensive readability overrides for labels, code blocks, prose and evicted tokens

fix: explicit high-contrast styling for Gradio inputs and textareas in dark mode

fix: make custom text in Gradio app completely robust for any text length

docs: update app.py references to use O(1) decode-step attention and constant-time formulations

deploy: add Gradio app, requirements.txt, and GitHub publish actions CI/CD