design: change dark theme to coffee

src/styles/app.css

@@ -25,7 +25,7 @@
 @plugin 'daisyui' {
   themes:
     retro --default,
-    forest --prefersdark;
+    coffee --prefersdark;
 }
 
 @config '../../tailwind.config.js';

src/theme.config.ts

@@ -3,5 +3,5 @@
 
 export const themeConfig = {
   light: 'retro',
-  dark: 'forest',
+  dark: 'coffee',
 }