refactor: remove deprecated and unused utility file

src/app/core/utils/use-mutation.spec.ts

@@ -1,31 +0,0 @@
-import { of, throwError } from 'rxjs';
-import { describe, expect, it, vi } from 'vitest';
-
-import { useMutation } from './use-mutation';
-
-describe('useMutation', () => {
-  it('stores the resolved value and clears loading after a successful execution', async () => {
-    const mutation = useMutation<{ id: number }, { ok: boolean; id: number }>();
-    const factory = vi.fn((payload: { id: number }) => of({ ok: true, id: payload.id }));
-
-    await expect(mutation.execute(factory, { id: 7 })).resolves.toEqual({ ok: true, id: 7 });
-
-    expect(factory).toHaveBeenCalledWith({ id: 7 });
-    expect(mutation.loading()).toBe(false);
-    expect(mutation.error()).toBeNull();
-    expect(mutation.data()).toEqual({ ok: true, id: 7 });
-  });
-
-  it('stores the thrown error and clears loading after a failed execution', async () => {
-    const mutation = useMutation<{ id: number }, { ok: boolean }>();
-    const failure = new Error('request failed');
-    const factory = vi.fn(() => throwError(() => failure));
-
-    await expect(mutation.execute(factory, { id: 7 })).rejects.toThrow('request failed');
-
-    expect(factory).toHaveBeenCalledWith({ id: 7 });
-    expect(mutation.loading()).toBe(false);
-    expect(mutation.error()).toBe(failure);
-    expect(mutation.data()).toBeNull();
-  });
-});

src/app/core/utils/use-mutation.ts

@@ -1,42 +0,0 @@
-import { signal, WritableSignal } from '@angular/core';
-import { Observable, firstValueFrom } from 'rxjs';
-
-export interface UseMutationResult<TData, TResult> {
-  loading: WritableSignal<boolean>;
-  error: WritableSignal<unknown | null>;
-  data: WritableSignal<TResult | null>;
-  execute: (factory: (payload: TData) => Observable<TResult>, payload: TData) => Promise<TResult>;
-}
-
-export function useMutation<TData, TResult>(): UseMutationResult<TData, TResult> {
-  const loading = signal(false);
-  const error = signal<unknown | null>(null);
-  const data = signal<TResult | null>(null);
-
-  async function execute(
-    factory: (payload: TData) => Observable<TResult>,
-    payload: TData
-  ): Promise<TResult> {
-    loading.set(true);
-    error.set(null);
-
-    try {
-      const result = await firstValueFrom(factory(payload));
-      data.set(result);
-
-      return result;
-    } catch (err) {
-      error.set(err);
-      throw err;
-    } finally {
-      loading.set(false);
-    }
-  }
-
-  return {
-    loading,
-    error,
-    data,
-    execute
-  };
-}