chore: configure vite for GitHub Pages deployment

vite.config.ts

@@ -3,16 +3,9 @@ import react from '@vitejs/plugin-react'
 
 export default defineConfig({
   plugins: [react()],
-  base: '/seedpgp-web-app/', // Match your repo name
+  base: '/seedpgp-web-app/',
   build: {
-    chunkSizeWarningLimit: 600, // Suppress warning
-    rollupOptions: {
-      output: {
-        manualChunks: {
-          'openpgp': ['openpgp'], // Separate chunk for PGP
-        }
-      }
-    }
+    outDir: 'dist',
+    emptyOutDir: false,
   }
 })
-