test: enhance agent-service tests with context loading mock

- Added a mock for the `loadContextFiles` function to return an empty context by default, improving test reliability.
- Updated the agent-service test suite to ensure proper initialization of the `AgentService` with mocked dependencies.

These changes aim to enhance the test coverage and stability of the agent-service functionality.

apps/server/tests/unit/services/agent-service.test.ts

@@ -4,12 +4,12 @@ import { ProviderFactory } from '@/providers/provider-factory.js';
 import * as fs from 'fs/promises';
 import * as imageHandler from '@automaker/utils';
 import * as promptBuilder from '@automaker/utils';
+import * as contextLoader from '@automaker/utils';
 import { collectAsyncGenerator } from '../../utils/helpers.js';
 
 vi.mock('fs/promises');
 vi.mock('@/providers/provider-factory.js');
 vi.mock('@automaker/utils');
-vi.mock('@automaker/utils');
 
 describe('agent-service.ts', () => {
   let service: AgentService;
@@ -21,6 +21,12 @@ describe('agent-service.ts', () => {
   beforeEach(() => {
     vi.clearAllMocks();
     service = new AgentService('/test/data', mockEvents as any);
+
+    // Mock loadContextFiles to return empty context by default
+    vi.mocked(contextLoader.loadContextFiles).mockResolvedValue({
+      files: [],
+      formattedPrompt: '',
+    });
   });
 
   describe('initialize', () => {

apps/ui/tests/utils/navigation/views.ts

@@ -24,6 +24,18 @@ export async function navigateToContext(page: Page): Promise<void> {
   await page.goto('/context');
   await page.waitForLoadState('networkidle');
 
+  // Wait for loading to complete (if present)
+  const loadingElement = page.locator('[data-testid="context-view-loading"]');
+  try {
+    const loadingVisible = await loadingElement.isVisible({ timeout: 2000 });
+    if (loadingVisible) {
+      // Wait for loading to disappear (context view will appear)
+      await loadingElement.waitFor({ state: 'hidden', timeout: 10000 });
+    }
+  } catch {
+    // Loading element not found or already hidden, continue
+  }
+
   // Wait for the context view to be visible
   await waitForElement(page, 'context-view', { timeout: 10000 });
 }