test(backend): mock helm CLI in helm/status route test

The `GET /api/installation/helm/status` test called the real route, which
spawns the `helm` binary. On CI runners without helm the spawn hangs until
Bun's 5000ms per-test timeout, failing the suite. (This was masked before
the coverage step started propagating exit codes.)

Mock `helmService.checkHelmAvailable` with a local restore, matching the
pattern used throughout installation.test.ts, so the test is deterministic
and no longer depends on helm being installed.

Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>

Author: surajssd

backend/src/hono-app.test.ts

@@ -3,6 +3,7 @@ import app, { parseCorsOrigin } from './hono-app';
 import { kubernetesService } from './services/kubernetes';
 import { configService } from './services/config';
 import { authService } from './services/auth';
+import { helmService } from './services/helm';
 import { mockServiceMethod } from './test/helpers';
 import { mockDeployment } from './test/fixtures';
 import { HTTPException } from 'hono/http-exception';
@@ -1288,10 +1289,21 @@ describe('Hono Routes', () => {
 
   describe('Installation Routes', () => {
     test('GET /api/installation/helm/status returns helm status', async () => {
-      const res = await app.request('/api/installation/helm/status');
-      expect(res.status).toBe(200);
-      const data = await res.json();
-      expect(data.available).toBeDefined();
+      // Mock the helm CLI probe so the test never spawns the real `helm`
+      // binary, which hangs on CI runners where helm is absent. Mirrors the
+      // pattern used throughout installation.test.ts.
+      const restore = mockServiceMethod(helmService, 'checkHelmAvailable', async () => ({
+        available: true,
+        version: 'v3.14.0',
+      }));
+      try {
+        const res = await app.request('/api/installation/helm/status');
+        expect(res.status).toBe(200);
+        const data = await res.json();
+        expect(data.available).toBeDefined();
+      } finally {
+        restore();
+      }
     });
   });