Update some things (workflows, tailwind etc)

[tudoramariei]

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[Copilot]

Pull Request Overview

This PR updates the project to Tailwind CSS v4, removes the standalone tailwind.config.js file, updates related dependencies, and applies numerous styling adjustments to align with the new Tailwind version's utility class changes. It also includes import reordering, workflow improvements, and package version updates.

• Migrated from Tailwind CSS v3 to v4
• Updated styling utilities throughout templates (shadow, outline, rounded classes)
• Reorganized Python imports for consistency

Reviewed Changes

Copilot reviewed 94 out of 96 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
backend/tailwind.config.js	Removed - configuration now in main.css
backend/assets/main.css	Complete rewrite for Tailwind v4 with @import syntax
backend/package.json	Updated to Tailwind v4.1.16 and @tailwindcss/postcss
backend/postcss.config.js	Simplified to use @tailwindcss/postcss plugin
backend/pyproject.toml	Updated django-unfold and svglib versions
docker/dockerfiles/Dockerfile*	Removed tailwind.config.js from COPY commands
backend/templates/**/*.html	Updated Tailwind classes (shadow-sm→shadow-xs, outline→outline-solid, rounded→rounded-sm, etc.)
backend/**/*.py	Reordered imports to follow standard conventions
.github/workflows/*.yml	Updated workflow configurations and improved consistency

Files not reviewed (1)

• backend/package-lock.json: Language not supported

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