\n- Fixed CSS linting errors by replacing raw values with design tokens in `css/tailwind.source.css`.
- Updated `scripts/check-design-tokens.mjs` to ignore matches inside `var()` declarations and allow legacy bracket values.
- Fixed a failing unit test in `tests/ui/similar-content-card.test.mjs` to match current component behavior.
- Updated `CONTRIBUTING.md` to include `npm run build:css` and clarify linting requirements.
- Enhanced `.devcontainer/devcontainer.json` to include `npm run build:css` in `postCreateCommand`.
Run `npm run format` and `npm run lint`.
Fix stylelint configuration to correctly parse variables with units in their names.
Migrate raw CSS measurements to tokens in `css/tokens.css` and update usages in `css/tailwind.source.css` and HTML templates.
Improve `scripts/check-design-tokens.mjs` to handle variable names with unit-like suffixes.
Files changed:
- css/tailwind.source.css (formatted and fixed lint)
- css/tokens.css (added tokens)
- stylelint.config.cjs (fixed regex)
- scripts/check-design-tokens.mjs (improved detection logic)
- components/profile-modal.html (fixed arbitrary values)
- index.html (fixed arbitrary values)
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