feat: Allow user-agent based conditions (#1821)

* Closes #1819

src/utils/companion.ts

@@ -0,0 +1,3 @@
+export const isCompanionApp = (userAgent: string): boolean => {
+  return !!userAgent.match(/Home ?Assistant/);
+};

src/utils/download.ts

@@ -3,6 +3,7 @@ import { localize } from '../localize/localize';
 import { ExtendedHomeAssistant, FrigateCardError } from '../types';
 import { ViewMedia } from '../view/media';
 import { errorToConsole } from './basic';
+import { isCompanionApp } from './companion';
 import { homeAssistantSignPath } from './ha';
 
 export const downloadURL = (url: string, filename = 'download'): void => {
@@ -11,11 +12,7 @@ export const downloadURL = (url: string, filename = 'download'): void => {
   const isSameOrigin = new URL(url).origin === window.location.origin;
   const dataURL = url.startsWith('data:');
 
-  if (
-    navigator.userAgent.startsWith('Home Assistant/') ||
-    navigator.userAgent.startsWith('HomeAssistant/') ||
-    (!isSameOrigin && !dataURL)
-  ) {
+  if (isCompanionApp(navigator.userAgent) || (!isSameOrigin && !dataURL)) {
     // Home Assistant companion apps cannot download files without opening a
     // new browser window.
     //