fix(maintenance mode): wait for valid server config on restart (#26456)

Signed-off-by: izzy <me@insrt.uk>

web/src/lib/managers/event-manager.svelte.ts

@@ -87,6 +87,8 @@ export type Events = {
   WorkflowDelete: [WorkflowResponseDto];
 
   ReleaseEvent: [ReleaseEvent];
+
+  WebsocketConnect: [];
 };
 
 export const eventManager = new BaseEventManager<Events>();

web/src/lib/stores/websocket.ts

@@ -62,7 +62,10 @@ export const websocketStore = {
 export const websocketEvents = createEventEmitter(websocket);
 
 websocket
-  .on('connect', () => websocketStore.connected.set(true))
+  .on('connect', () => {
+    eventManager.emit('WebsocketConnect');
+    websocketStore.connected.set(true);
+  })
   .on('disconnect', () => websocketStore.connected.set(false))
   .on('on_server_version', (serverVersion) => websocketStore.serverVersion.set(serverVersion))
   .on('AppRestartV1', (mode) => websocketStore.serverRestarting.set(mode))