design: change dark theme to black

src/styles/app.css

@@ -26,7 +26,7 @@
 @plugin 'daisyui' {
   themes:
     garden --default,
-    sunset --prefersdark;
+    black --prefersdark;
 }
 
 @config '../../tailwind.config.js';

src/theme.config.ts

@@ -3,5 +3,5 @@
 
 export const themeConfig = {
   light: "garden",
-  dark: "sunset"
+  dark: 'black'
 }