Complete daisyUI migration with CSS fixes

- Migrate all pages to daisyUI components
- Add data-theme="light" to app.html for proper theme
- Fix config to load .env from multiple locations
- Update avatar to use avatar-placeholder pattern
- Use @tailwindcss/vite plugin instead of PostCSS

frontend/vite.config.ts

@@ -1,6 +1,7 @@
 import { sveltekit } from '@sveltejs/kit/vite';
+import tailwindcss from '@tailwindcss/vite';
 import { defineConfig } from 'vite';
 
 export default defineConfig({
-  plugins: [sveltekit()]
+  plugins: [tailwindcss(), sveltekit()]
 });