bumping tailwindcss to latest version

[polatengin]

This pull request refactors the frontend build process by replacing the standalone Tailwind CSS setup with a PostCSS-based workflow. It also updates related dependencies and configuration files to align with this change. Below are the most important changes grouped by theme.

Build Process Refactor:

• Replaced Tailwind CSS's direct usage with a PostCSS-based workflow in the compile script of package.json. The script now uses postcss with a custom configuration file (postcss.config.js) instead of invoking tailwindcss directly.

Dependency Updates:

• Updated tailwindcss to version 4.1.10 and replaced autoprefixer with @tailwindcss/postcss and cssnano in package.json. Added postcss-cli as a new dependency. [1] [2] [3]

Configuration Changes:

• Replaced the tailwind.config.js file with inline @theme and @source directives in index.css. This eliminates the need for a separate Tailwind configuration file. [1] [2]
• Updated postcss.config.js to include @tailwindcss/postcss and cssnano plugins for processing CSS.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.46%. Comparing base (6482053) to head (7992e6f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1244   +/-   ##
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  Coverage   53.46%   53.46%           
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  Files          46       46           
  Lines        3346     3346           
  Branches      901      901           
=======================================
  Hits         1789     1789           
  Misses       1557     1557           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[codecov-commenter]

Bundle Report

Bundle size has no change ✅