style: clean up import statements for consistency

frontend/src/app/feature/game/slots/slots.component.ts

@@ -61,7 +61,7 @@ export default class SlotsComponent implements OnInit, OnDestroy {
       this.slotInfo.set(data);
     });
 
-    this.userSubscription = this.userService.currentUser$.subscribe((user) => {
+    this.userSubscription = this.userService.getCurrentUser().subscribe((user) => {
       this.balance.set(user?.balance ?? 0);
     });
 

frontend/src/app/feature/transaction-history/transaction-history.component.ts

@@ -1,11 +1,4 @@
-import {
-  ChangeDetectionStrategy,
-  Component,
-  EventEmitter,
-  inject,
-  Input,
-  Output,
-} from '@angular/core';
+import { ChangeDetectionStrategy, Component, EventEmitter, inject, Input, Output } from '@angular/core';
 import { TransactionService } from '@service/transaction.service';
 import { Observable } from 'rxjs';
 import { AsyncPipe, CurrencyPipe, DatePipe, NgIf } from '@angular/common';