- Introduced a new CSS variable `--menu-font-size` calculated from the base font size.
- Updated `PreferenceManager` to trigger CSS variable updates when `fontSize` is modified.
- Adjusted `updateCSSVariables` to set the new `--menu-font-size` based on the theme's font size.
- Ensured that the menu components utilize the updated font size with `!important` to maintain styling consistency.
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