fix: correctly not import preflight in tailwind 4

Author: kolaente

frontend/src/styles/global.scss

@@ -1,5 +1,7 @@
 @config "../../tailwind.config.js";
-@import "tailwindcss";
+@layer theme, base, components, utilities;
+@import "tailwindcss/theme.css" layer(theme);
+@import "tailwindcss/utilities.css" layer(utilities);
 
 @import "fonts";