Optimize academy

.env.example

@@ -399,6 +399,12 @@ GOOGLE_CLIENT_ID=
 GOOGLE_CLIENT_SECRET=
 GOOGLE_REDIRECT_URI=/auth/google/callback
 
+# Optional light theme feature
+# Set LIGHT_THEME_ENABLED=true to allow a light theme in the client-side toggle.
+# Set LIGHT_THEME_SHOW_SWITCH=true to display the theme switch in the toolbar.
+LIGHT_THEME_ENABLED=false
+LIGHT_THEME_SHOW_SWITCH=false
+
 # Discord — https://discord.com/developers/applications
 DISCORD_CLIENT_ID=
 DISCORD_CLIENT_SECRET=