refactor: update font config guide in fonts.ts (#164)

Resolves #136

src/config/fonts.ts

@@ -1,28 +1,19 @@
 /**
- * List of available font names (visit the url`/settings/appearance`).
- * This array is used to generate Tailwind's `safelist` inside 'tailwind.config.js' and 'appearance-form.tsx'
- * to prevent dynamic font classes (e.g., `font-inter`, `font-manrope`) from being removed during purging.
+ * List of available font names (visit the url `/settings/appearance`).
+ * This array is used to generate dynamic font classes (e.g., `font-inter`, `font-manrope`).
  *
- * 📝 How to Add a New Font:
+ * 📝 How to Add a New Font (Tailwind v4+):
  * 1. Add the font name here.
  * 2. Update the `<link>` tag in 'index.html' to include the new font from Google Fonts (or any other source).
- * 3. Add new fontFamily 'tailwind.config.js'
+ * 3. Add the new font family to 'index.css' using the `@theme inline` and `font-family` CSS variable.
  *
  * Example:
  * fonts.ts           → Add 'roboto' to this array.
  * index.html         → Add Google Fonts link for Roboto.
- * tailwind.config.js  → Add the new font inside `theme.extend.fontFamily`.
- * ```ts
- * theme: {
- *   // other configs
- *   extend: {
- *      fontFamily: {
- *        inter: ['Inter', ...fontFamily.sans],
- *        manrope: ['Manrope', ...fontFamily.sans],
- *        roboto: ['Roboto', ...fontFamily.sans], // Add new font here
- *      }
+ * index.css          → Add the new font in the CSS, e.g.:
+ *   @theme inline {
+ *      // ... other font families
+ *      --font-roboto: 'Roboto', var(--font-sans);
  *   }
- * }
- * ```
  */
 export const fonts = ['inter', 'manrope', 'system'] as const