fix: open the dedicated Reddit Chat host

extensions/reddit-session-exporter/service-worker.js

@@ -1,6 +1,7 @@
 import {
   assertMatchingSessionIdentity,
   createSessionExportDownload,
+  REDDIT_CHAT_URL,
 } from './session-export.js';
 
 const MATRIX_URLS = [
@@ -64,7 +65,13 @@ chrome.action.onClicked.addListener(async () => {
     const cookies = await chrome.cookies.getAll({ domain: 'reddit.com' });
     const { matrixCapture } = await chrome.storage.local.get('matrixCapture');
     if (!matrixCapture) {
-      throw new Error('Open Reddit Chat, wait for it to load, then click the extension again.');
+      await chrome.tabs.create({ url: REDDIT_CHAT_URL });
+      await chrome.action.setBadgeText({ text: '...' });
+      await chrome.action.setBadgeBackgroundColor({ color: '#6c757d' });
+      await chrome.action.setTitle({
+        title: 'Reddit Chat opened. Wait for the badge to show OK, then click again.',
+      });
+      return;
     }
 
     const whoami = await fetch(`${matrixCapture.homeserver}/_matrix/client/v3/account/whoami`, {