add Vite Vue 3 TypeScript frontend skeleton.

Minimal home view and dev server on port 5173 for later Docker wiring.

frontend/vite.config.ts

@@ -0,0 +1,18 @@
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { defineConfig } from 'vite';
+import vue from '@vitejs/plugin-vue';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+export default defineConfig({
+    resolve: {
+        alias: {
+            '@': path.resolve(__dirname, 'src')
+        }
+    },
+    plugins: [vue()],
+    server: {
+        port: 5173
+    }
+});