feat: field-sync-gui MVP — Wails GUI ingest SD→local+S3 (4 slots //)

frontend/vite.config.ts

@@ -0,0 +1,7 @@
+import {defineConfig} from 'vite'
+import {svelte} from '@sveltejs/vite-plugin-svelte'
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [svelte()]
+})