feat: conversion landing page with automated screenshots

frontend/vite.config.ts

@@ -7,6 +7,13 @@ export default defineConfig({
   plugins: [react()],
   server: {
     port: 3000,
+    // Polling: the repo is bind-mounted from a Windows host, whose file
+    // events often never reach the Linux watcher — without this, edits
+    // (local or via VS Code) silently keep serving stale modules.
+    watch: {
+      usePolling: true,
+      interval: 1000,
+    },
     proxy: {
       "/api": {
         target: "http://api:8000",