Finalize accessibility docs and performance reports

[andreazedda]

Summary

• Added the acceptance checklist and accessibility interaction report required for hand-off.
• Replaced remote font/bootstrap dependencies with custom layout, focus, and CTA styles plus an inline favicon and deferred scripts.
• Captured before/after Lighthouse reports and added npm tooling for repeatable audits.

Testing

• CHROME_PATH=/root/.cache/puppeteer/chrome/linux-140.0.7339.82/chrome-linux64/chrome npx --yes lighthouse http://127.0.0.1:8091/index.html --only-categories=performance,accessibility,best-practices,seo --output=json --output-path=reports/lighthouse-before.json --quiet --form-factor=mobile --screenEmulation.mobile --screenEmulation.width=360 --screenEmulation.height=640 --screenEmulation.deviceScaleFactor=2 --throttling-method=simulate --chrome-flags="--headless --no-sandbox --disable-gpu --ignore-certificate-errors"
• CHROME_PATH=/root/.cache/puppeteer/chrome/linux-140.0.7339.82/chrome-linux64/chrome npx --yes lighthouse http://127.0.0.1:8094/index.html --only-categories=performance,accessibility,best-practices,seo --output=json --output-path=reports/lighthouse-after.json --quiet --form-factor=mobile --screenEmulation.mobile --screenEmulation.width=360 --screenEmulation.height=640 --screenEmulation.deviceScaleFactor=2 --throttling-method=simulate --chrome-flags="--headless --no-sandbox --disable-gpu --ignore-certificate-errors"

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https://chatgpt.com/codex/tasks/task_e_68cc0b4816c48330b3ce85ef80260110