feat: add Playwright E2E smoke tests and fix empty namespace crash

Fix getNamespaces() to skip cluster-scoped resources (Namespace: "")
that caused Router.createRouteURL to throw TypeError on the Namespaces
page. Add Playwright E2E smoke tests with Authentik OIDC auth for CI
and K8s token fallback for local dev. Add Gitea Actions E2E workflow,
vitest unit test infrastructure, and test-utils fixtures.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/api/PolarisDataContext.test.tsx

@@ -0,0 +1,48 @@
+import { renderHook } from '@testing-library/react';
+import React from 'react';
+import { describe, expect, it, vi } from 'vitest';
+import { makeAuditData, makeResult } from '../test-utils';
+
+vi.mock('@kinvolk/headlamp-plugin/lib', () => ({
+  ApiProxy: { request: vi.fn() },
+}));
+
+// Mock usePolarisData so PolarisDataProvider doesn't make real API calls
+vi.mock('./polaris', async importOriginal => {
+  const actual = await importOriginal<typeof import('./polaris')>();
+  return {
+    ...actual,
+    usePolarisData: vi.fn(() => ({
+      data: makeAuditData([makeResult()]),
+      loading: false,
+      error: null,
+    })),
+  };
+});
+
+import { PolarisDataProvider, usePolarisDataContext } from './PolarisDataContext';
+
+describe('usePolarisDataContext', () => {
+  it('throws when used outside PolarisDataProvider', () => {
+    // Suppress console.error from React during expected error
+    const spy = vi.spyOn(console, 'error').mockImplementation(() => {});
+
+    expect(() => {
+      renderHook(() => usePolarisDataContext());
+    }).toThrow('usePolarisDataContext must be used within a PolarisDataProvider');
+
+    spy.mockRestore();
+  });
+
+  it('returns context value when inside PolarisDataProvider', () => {
+    const wrapper = ({ children }: { children: React.ReactNode }) => (
+      <PolarisDataProvider>{children}</PolarisDataProvider>
+    );
+
+    const { result } = renderHook(() => usePolarisDataContext(), { wrapper });
+
+    expect(result.current.data).not.toBeNull();
+    expect(result.current.loading).toBe(false);
+    expect(result.current.error).toBeNull();
+  });
+});

src/api/polaris.test.ts

@@ -1,45 +1,25 @@
-import { describe, expect, it, vi } from 'vitest';
+import { act, renderHook, waitFor } from '@testing-library/react';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { makeAuditData, makeResult } from '../test-utils';
 
 vi.mock('@kinvolk/headlamp-plugin/lib', () => ({
   ApiProxy: { request: vi.fn() },
 }));
 
+import { ApiProxy } from '@kinvolk/headlamp-plugin/lib';
 import {
-  AuditData,
   computeScore,
   countResults,
   countResultsForItems,
   filterResultsByNamespace,
   getNamespaces,
+  getRefreshInterval,
   Result,
   ResultCounts,
+  setRefreshInterval,
+  usePolarisData,
 } from './polaris';
 
-// --- Fixtures ---
-
-function makeResult(overrides: Partial<Result> = {}): Result {
-  return {
-    Name: 'my-deploy',
-    Namespace: 'default',
-    Kind: 'Deployment',
-    Results: {},
-    CreatedTime: '2025-01-01T00:00:00Z',
-    ...overrides,
-  };
-}
-
-function makeAuditData(results: Result[]): AuditData {
-  return {
-    PolarisOutputVersion: '1.0',
-    AuditTime: '2025-01-01T00:00:00Z',
-    SourceType: 'Cluster',
-    SourceName: 'test',
-    DisplayName: 'test',
-    ClusterInfo: { Version: '1.28', Nodes: 3, Pods: 10, Namespaces: 2, Controllers: 5 },
-    Results: results,
-  };
-}
-
 // --- computeScore ---
 
 describe('computeScore', () => {
@@ -241,6 +221,15 @@ describe('getNamespaces', () => {
     ]);
     expect(getNamespaces(data)).toEqual(['alpha', 'beta', 'gamma']);
   });
+
+  it('excludes results with empty namespace (cluster-scoped resources)', () => {
+    const data = makeAuditData([
+      makeResult({ Namespace: '' }),
+      makeResult({ Namespace: 'alpha' }),
+      makeResult({ Namespace: '' }),
+    ]);
+    expect(getNamespaces(data)).toEqual(['alpha']);
+  });
 });
 
 // --- filterResultsByNamespace ---
@@ -262,3 +251,140 @@ describe('filterResultsByNamespace', () => {
     expect(filterResultsByNamespace(data, 'ns-missing')).toEqual([]);
   });
 });
+
+// --- getRefreshInterval / setRefreshInterval ---
+
+describe('getRefreshInterval', () => {
+  beforeEach(() => {
+    window.localStorage.removeItem('polaris-plugin-refresh-interval');
+  });
+
+  it('returns default (300) when nothing stored', () => {
+    expect(getRefreshInterval()).toBe(300);
+  });
+
+  it('returns stored value when valid', () => {
+    localStorage.setItem('polaris-plugin-refresh-interval', '60');
+    expect(getRefreshInterval()).toBe(60);
+  });
+
+  it('returns default for non-numeric stored value', () => {
+    localStorage.setItem('polaris-plugin-refresh-interval', 'abc');
+    expect(getRefreshInterval()).toBe(300);
+  });
+
+  it('returns default for zero stored value', () => {
+    localStorage.setItem('polaris-plugin-refresh-interval', '0');
+    expect(getRefreshInterval()).toBe(300);
+  });
+
+  it('returns default for negative stored value', () => {
+    localStorage.setItem('polaris-plugin-refresh-interval', '-10');
+    expect(getRefreshInterval()).toBe(300);
+  });
+});
+
+describe('setRefreshInterval', () => {
+  beforeEach(() => {
+    window.localStorage.removeItem('polaris-plugin-refresh-interval');
+  });
+
+  it('stores value that getRefreshInterval reads back', () => {
+    setRefreshInterval(1800);
+    expect(getRefreshInterval()).toBe(1800);
+  });
+});
+
+// --- usePolarisData ---
+
+describe('usePolarisData', () => {
+  const mockRequest = ApiProxy.request as ReturnType<typeof vi.fn>;
+
+  beforeEach(() => {
+    mockRequest.mockReset();
+  });
+
+  it('returns data on successful fetch', async () => {
+    const auditData = makeAuditData([makeResult()]);
+    mockRequest.mockResolvedValue(auditData);
+
+    const { result } = renderHook(() => usePolarisData(300));
+
+    await waitFor(() => {
+      expect(result.current.loading).toBe(false);
+    });
+
+    expect(result.current.data).toEqual(auditData);
+    expect(result.current.error).toBeNull();
+  });
+
+  it('returns RBAC error on 403', async () => {
+    mockRequest.mockRejectedValue({ status: 403 });
+
+    const { result } = renderHook(() => usePolarisData(300));
+
+    await waitFor(() => {
+      expect(result.current.loading).toBe(false);
+    });
+
+    expect(result.current.data).toBeNull();
+    expect(result.current.error).toContain('403');
+    expect(result.current.error).toContain('RBAC');
+  });
+
+  it('returns not-installed error on 404', async () => {
+    mockRequest.mockRejectedValue({ status: 404 });
+
+    const { result } = renderHook(() => usePolarisData(300));
+
+    await waitFor(() => {
+      expect(result.current.loading).toBe(false);
+    });
+
+    expect(result.current.error).toContain('not reachable');
+  });
+
+  it('returns not-installed error on 503', async () => {
+    mockRequest.mockRejectedValue({ status: 503 });
+
+    const { result } = renderHook(() => usePolarisData(300));
+
+    await waitFor(() => {
+      expect(result.current.loading).toBe(false);
+    });
+
+    expect(result.current.error).toContain('not reachable');
+  });
+
+  it('returns generic error for other failures', async () => {
+    mockRequest.mockRejectedValue(new Error('network down'));
+
+    const { result } = renderHook(() => usePolarisData(300));
+
+    await waitFor(() => {
+      expect(result.current.loading).toBe(false);
+    });
+
+    expect(result.current.error).toContain('Failed to fetch');
+    expect(result.current.error).toContain('network down');
+  });
+
+  it('does not update state after unmount', async () => {
+    let resolveFetch: (value: unknown) => void = () => {};
+    mockRequest.mockReturnValue(
+      new Promise(resolve => {
+        resolveFetch = resolve;
+      })
+    );
+
+    const { result, unmount } = renderHook(() => usePolarisData(300));
+    expect(result.current.loading).toBe(true);
+
+    unmount();
+
+    // Resolve after unmount — should not throw or update state
+    await act(async () => {
+      resolveFetch(makeAuditData([]));
+    });
+  });
+});

src/api/polaris.ts

@@ -105,7 +105,9 @@ export function countResultsForItems(results: Result[]): ResultCounts {
 export function getNamespaces(data: AuditData): string[] {
   const namespaces = new Set<string>();
   for (const result of data.Results) {
-    namespaces.add(result.Namespace);
+    if (result.Namespace) {
+      namespaces.add(result.Namespace);
+    }
   }
   return Array.from(namespaces).sort();
 }