use new event channel for mobile and web

flutter/web/js/vite.config.js

@@ -0,0 +1,14 @@
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+    build: {
+        manifest: false,
+        rollupOptions: {
+            output: {
+                entryFileNames: `[name].js`,
+                chunkFileNames: `[name].js`,
+                assetFileNames: `[name].[ext]`,
+            }
+        }
+    },
+})