fix: handle websocket unsubscribe errors gracefully

src/services/hass-service.ts

@@ -48,16 +48,20 @@ export default class HassService {
     return new Promise<HassEntity[]>(async (resolve) => {
       const subscribeMessage = {
         type: 'render_template',
-        template: "{{ device_entities(device_id('" + player.id + "')) }}",
+        template: `{{ device_entities(device_id('${player.id}')) }}`,
       };
       try {
         const unsubscribe = await this.hass.connection.subscribeMessage<TemplateResult>((response) => {
-          unsubscribe();
-          resolve(
-            response.result
-              .filter((item: string) => entityTypes.some((type) => item.includes(type)))
-              .map((item) => this.hass.states[item]),
-          );
+          try {
+            unsubscribe();
+            resolve(
+              response.result
+                .filter((item: string) => entityTypes.some((type) => item.includes(type)))
+                .map((item) => this.hass.states[item]),
+            );
+          } catch {
+            resolve([]);
+          }
         }, subscribeMessage);
       } catch {
         resolve([]);