fix: use esnext target, drop vite-plugin-top-level-await

Plugin crashes with Rollup 4. esnext target supports TLA natively.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

vite.config.js

@@ -6,7 +6,6 @@ import { viteStaticCopy } from 'vite-plugin-static-copy';
 import { vanillaExtractPlugin } from '@vanilla-extract/vite-plugin';
 import { NodeGlobalsPolyfillPlugin } from '@esbuild-plugins/node-globals-polyfill';
 import inject from '@rollup/plugin-inject';
-import topLevelAwait from 'vite-plugin-top-level-await';
 import { VitePWA } from 'vite-plugin-pwa';
 import fs from 'fs';
 import path from 'path';
@@ -79,23 +78,15 @@ export default defineConfig({
     port: 8080,
     host: true,
     fs: {
-      // Allow serving files from one level up to the project root
       allow: ['..'],
     },
   },
   plugins: [
     serverMatrixSdkCryptoWasm('/node_modules/.vite/deps/pkg/matrix_sdk_crypto_wasm_bg.wasm'),
-    topLevelAwait({
-      // The export name of top-level await promise for each chunk module
-      promiseExportName: '__tla',
-      // The function to generate import names of top-level await promise in each chunk module
-      promiseImportName: (i) => `__tla_${i}`,
-    }),
     viteStaticCopy(copyFiles),
     vanillaExtractPlugin(),
     wasm(),
     react(),
-    // Upload source maps to Sentry when auth token is present, then delete maps from dist
     ...(process.env.SENTRY_AUTH_TOKEN
       ? [
           sentryVitePlugin({
@@ -131,7 +122,6 @@ export default defineConfig({
         global: 'globalThis',
       },
       plugins: [
-        // Enable esbuild polyfill plugins
         NodeGlobalsPolyfillPlugin({
           process: false,
           buffer: true,
@@ -140,6 +130,7 @@ export default defineConfig({
     },
   },
   build: {
+    target: 'esnext',
     outDir: 'dist',
     sourcemap: process.env.SENTRY_AUTH_TOKEN ? 'hidden' : false,
     copyPublicDir: false,