Landing-page: ping supervisor before get network infos (#24330)

* Ping supervisor before get network infos

* Rename supervisor proxy prefix

landing-page/src/components/landing-page-network.ts

@@ -17,6 +17,7 @@ import "../../../src/components/ha-alert";
 import {
   ALTERNATIVE_DNS_SERVERS,
   getSupervisorNetworkInfo,
+  pingSupervisor,
   setSupervisorNetworkDns,
 } from "../data/supervisor";
 import { fireEvent } from "../../../src/common/dom/fire_event";
@@ -85,7 +86,28 @@ class LandingPageNetwork extends LitElement {
 
   protected firstUpdated(_changedProperties: PropertyValues): void {
     super.firstUpdated(_changedProperties);
-    this._fetchSupervisorInfo();
+    this._pingSupervisor();
+  }
+
+  private _schedulePingSupervisor() {
+    setTimeout(
+      () => this._pingSupervisor(),
+      SCHEDULE_FETCH_NETWORK_INFO_SECONDS * 1000
+    );
+  }
+
+  private async _pingSupervisor() {
+    try {
+      const response = await pingSupervisor();
+      if (!response.ok) {
+        throw new Error("Failed to ping supervisor, assume update in progress");
+      }
+      this._fetchSupervisorInfo();
+    } catch (err) {
+      // eslint-disable-next-line no-console
+      console.error(err);
+      this._schedulePingSupervisor();
+    }
   }
 
   private _scheduleFetchSupervisorInfo() {

landing-page/src/data/supervisor.ts

@@ -18,7 +18,7 @@ export const ALTERNATIVE_DNS_SERVERS: {
 ];
 
 export async function getSupervisorLogs(lines = 100) {
-  return fetch(`/supervisor/supervisor/logs?lines=${lines}`, {
+  return fetch(`/supervisor-api/supervisor/logs?lines=${lines}`, {
     headers: {
       Accept: "text/plain",
     },
@@ -26,22 +26,26 @@ export async function getSupervisorLogs(lines = 100) {
 }
 
 export async function getSupervisorLogsFollow(lines = 500) {
-  return fetch(`/supervisor/supervisor/logs/follow?lines=${lines}`, {
+  return fetch(`/supervisor-api/supervisor/logs/follow?lines=${lines}`, {
     headers: {
       Accept: "text/plain",
     },
   });
 }
 
+export async function pingSupervisor() {
+  return fetch("/supervisor-api/supervisor/ping");
+}
+
 export async function getSupervisorNetworkInfo() {
-  return fetch("/supervisor/network/info");
+  return fetch("/supervisor-api/network/info");
 }
 
 export const setSupervisorNetworkDns = async (
   dnsServerIndex: number,
   primaryInterface: string
 ) =>
-  fetch(`/supervisor/network/interface/${primaryInterface}/update`, {
+  fetch(`/supervisor-api/network/interface/${primaryInterface}/update`, {
     method: "POST",
     body: JSON.stringify({
       ipv4: {