Reconnection when signal server is not active and minor changes

src/app/core/services/server-directory.service.ts

@@ -563,10 +563,10 @@ export class ServerDirectoryService {
       );
   }
 
-  /** Notify the directory that a user has left a server. */
-  notifyLeave(serverId: string, userId: string): Observable<void> {
+  /** Remove a user's remembered membership after leaving a server. */
+  notifyLeave(serverId: string, userId: string, selector?: ServerSourceSelector): Observable<void> {
     return this.http
-      .post<void>(`${this.buildApiBaseUrl()}/servers/${serverId}/leave`, { userId })
+      .post<void>(`${this.buildApiBaseUrl(selector)}/servers/${serverId}/leave`, { userId })
       .pipe(
         catchError((error) => {
           console.error('Failed to notify leave:', error);