Optimize the Nav Menu and i18n Experience

[BlockLune]

Preview

Features

• Add icons for the page switcher
• Hide text if the screen is too small

• A brand new lang switcher with a more compact and smaller appearance and simpler logic
• Global transition when switching lang and page

• A brand new light/dark switcher

TODOs

@yy4382 Help! I don't know how to do these:

• [x] Transition when switch light/dark
• [x] Transition of the nav menu

[BlockLune]

Would it be better to change the button for switching between the light and dark themes to a drop-down menu, similar to the lang switcher? It's a bit counter-intuitive that clicking a button sometimes doesn't produce any effect ... I think.

[yy4382]

Would it be better to change the button for switching between the light and dark themes to a drop-down menu, similar to the lang switcher? It's a bit counter-intuitive that clicking a button sometimes doesn't produce any effect ... I think.

Done in 391b8dd