feat: new UI for Ranking picker flow

[lorenzocorallo]

cc Opus 4.5

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[Copilot]

Pull request overview

This PR introduces a comprehensive redesign of the ranking picker flow UI for the Politecnico di Milano graduation rankings application. The changes replace the previous button-grid based interface with a more modern, card-based design featuring language-grouped rankings and improved visual hierarchy.

Key Changes

• New card-based UI components for school selection and ranking display
• Language-organized ranking selector with Italian/English categorization
• Updated styling with gradient backgrounds, badges, and improved dark mode support

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
src/index.css	Removes underline styling from global link styles
src/components/Homepage/SchoolCard.tsx	Adds new school selection card component with emoji icons and gradient backgrounds
src/components/Homepage/RankingSelector.tsx	Creates complex ranking selector with language grouping and phase organization
src/app/_home/index.tsx	Refactors homepage to use new SchoolCard component
src/app/_home/$school/index.tsx	Replaces button grid with badge-based year selection
src/app/_home/$school/$year/index.tsx	Integrates new RankingSelector component for phase selection

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[github-actions]

Pages Preview
🚀 Deployed preview to https://PoliNetworkOrg.github.io/preview/PoliNetworkOrg/Rankings/pr/293
on branch gh-pages at 2025-12-23 22:45:00 +0000

[toto04]

carino! molto più bellino di quello attuale
certo è tutta estetica ce ne vuole a fuckuppare qualcosa qui anche se sei un'AI, io non ho notato niente di strano 🤷‍♂️