fix: append history load more results

src/app/core/stores/history.store.spec.ts

@@ -0,0 +1,94 @@
+import { TestBed } from '@angular/core/testing';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+
+import type { HistoryListRequest, HistoryListResponse, HistoryStats, JobHistoryRecord } from '../../../shared/contracts';
+import { BrewFacadeService } from '../services/brew-facade.service';
+import { HistoryStore } from './history.store';
+
+const stats: HistoryStats = {
+  totalJobs: 2,
+  successRate: 1,
+  medianDurationMs: 100,
+  last7Days: { total: 2, succeeded: 2, failed: 0 },
+  failureRateByAction: []
+};
+
+describe('HistoryStore', () => {
+  afterEach(() => {
+    TestBed.resetTestingModule();
+  });
+
+  it('appends later history pages to the currently loaded rows', async () => {
+    const firstPageRecord = historyRecord('job-1');
+    const secondPageRecord = historyRecord('job-2');
+    const { store, facade } = setupHistoryStore({
+      1: [firstPageRecord],
+      2: [secondPageRecord]
+    }, 2);
+
+    await store.load(1);
+    await store.load(2);
+
+    expect(store.items().map((item) => item.jobId)).toEqual(['job-1', 'job-2']);
+    expect(store.total()).toBe(2);
+    expect(store.page()).toBe(2);
+    expect(facade.listHistory).toHaveBeenNthCalledWith(1, { page: 1, pageSize: 50 });
+    expect(facade.listHistory).toHaveBeenNthCalledWith(2, { page: 2, pageSize: 50 });
+  });
+
+  it('replaces loaded history rows when reloading the first page', async () => {
+    const originalFirstPageRecord = historyRecord('job-1');
+    const secondPageRecord = historyRecord('job-2');
+    const refreshedFirstPageRecord = historyRecord('job-3');
+    const pages: Record<number, JobHistoryRecord[]> = {
+      1: [originalFirstPageRecord],
+      2: [secondPageRecord]
+    };
+    const { store } = setupHistoryStore(pages, 2);
+
+    await store.load(1);
+    await store.load(2);
+    pages[1] = [refreshedFirstPageRecord];
+    await store.load(1);
+
+    expect(store.items().map((item) => item.jobId)).toEqual(['job-3']);
+    expect(store.page()).toBe(1);
+  });
+});
+
+function setupHistoryStore(pages: Record<number, JobHistoryRecord[]>, total: number) {
+  const facade = {
+    listHistory: vi.fn(async (request: HistoryListRequest): Promise<HistoryListResponse> => ({
+      items: pages[request.page ?? 1] ?? [],
+      total,
+      page: request.page ?? 1,
+      pageSize: request.pageSize ?? 50
+    })),
+    getHistoryStats: vi.fn(async () => stats)
+  };
+
+  TestBed.configureTestingModule({
+    providers: [{ provide: BrewFacadeService, useValue: facade }]
+  });
+
+  const store = TestBed.inject(HistoryStore);
+  return { store, facade };
+}
+
+function historyRecord(jobId: string): JobHistoryRecord {
+  return {
+    jobId,
+    action: 'upgradeAll',
+    packageName: null,
+    kind: 'system',
+    status: 'succeeded',
+    command: 'brew upgrade',
+    exitCode: 0,
+    durationMs: 100,
+    error: null,
+    source: 'manual',
+    startedAt: '2026-01-01T00:00:00.000Z',
+    completedAt: '2026-01-01T00:01:00.000Z',
+    outputTail: null
+  };
+}

src/app/core/stores/history.store.ts

@@ -45,7 +45,7 @@ export const HistoryStore = signalStore(
         ]);
 
         patchState(store, {
-          items: list.items,
+          items: page === 1 ? list.items : [...store.items(), ...list.items],
           total: list.total,
           stats,
           loading: false

src/app/features/history/history-view/history-view.component.html

@@ -83,9 +83,13 @@ <h2 class="text-lg font-semibold">History</h2>
       }
     </div>
 
-    <div class="flex justify-end">
-      <z-button zType="secondary" (click)="historyStore.load(historyStore.page() + 1)">Load more</z-button>
-    </div>
+    @if (historyStore.items().length < historyStore.total()) {
+      <div class="flex justify-end">
+        <z-button zType="secondary" (click)="historyStore.load(historyStore.page() + 1)">
+          Load more
+        </z-button>
+      </div>
+    }
   }
 
   @if (selectedSnapshot(); as snapshot) {

src/app/features/history/history-view/history-view.component.spec.ts

@@ -68,10 +68,10 @@ const stats: HistoryStats = {
 };
 
 describe('HistoryViewComponent', () => {
-  async function render(items: JobHistoryRecord[] = [record]) {
+  async function render(items: JobHistoryRecord[] = [record], total = items.length) {
     const store = {
       items: signal(items),
-      total: signal(items.length),
+      total: signal(total),
       page: signal(1),
       pageSize: signal(50),
       stats: signal<HistoryStats | null>(stats),
@@ -115,6 +115,13 @@ describe('HistoryViewComponent', () => {
     expect(html.textContent).toContain('Showing first 3 of 4 packages. 1 omitted from persisted history.');
     expect(html.textContent).not.toContain('upgrade complete');
   });
+
+  it('hides the load more button after all history rows are loaded', async () => {
+    const { fixture } = await render([record], 1);
+    const html = fixture.nativeElement as HTMLElement;
+
+    expect(findButtonByText(html, 'Load more')).toBeNull();
+  });
 });
 
 function findButtonByText(root: HTMLElement, text: string): HTMLElement | null {