feat: consolidate dashboard pages, fix namespace links, add tests

Merge Overview and Full Audit into a single dashboard page that always
shows the skipped check count. Fix namespace link 404s by using
Headlamp's Link component (which generates cluster-prefixed URLs)
instead of raw react-router-dom Link. Add vitest unit tests for all
polaris.ts utility functions.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/api/polaris.test.ts

@@ -0,0 +1,264 @@
+import { describe, expect, it, vi } from 'vitest';
+
+vi.mock('@kinvolk/headlamp-plugin/lib', () => ({
+  ApiProxy: { request: vi.fn() },
+}));
+
+import {
+  AuditData,
+  computeScore,
+  countResults,
+  countResultsForItems,
+  filterResultsByNamespace,
+  getNamespaces,
+  Result,
+  ResultCounts,
+} 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', () => {
+  it('returns 0 when total is 0', () => {
+    const counts: ResultCounts = { total: 0, pass: 0, warning: 0, danger: 0, skipped: 0 };
+    expect(computeScore(counts)).toBe(0);
+  });
+
+  it('returns 100 when all checks pass', () => {
+    const counts: ResultCounts = { total: 10, pass: 10, warning: 0, danger: 0, skipped: 0 };
+    expect(computeScore(counts)).toBe(100);
+  });
+
+  it('rounds to nearest integer', () => {
+    const counts: ResultCounts = { total: 3, pass: 1, warning: 1, danger: 1, skipped: 0 };
+    expect(computeScore(counts)).toBe(33);
+  });
+
+  it('includes skipped in total denominator', () => {
+    const counts: ResultCounts = { total: 10, pass: 5, warning: 2, danger: 1, skipped: 2 };
+    expect(computeScore(counts)).toBe(50);
+  });
+});
+
+// --- countResults / countResultsForItems ---
+
+describe('countResults', () => {
+  it('returns zero counts for empty results', () => {
+    const data = makeAuditData([]);
+    const counts = countResults(data);
+    expect(counts).toEqual({ total: 0, pass: 0, warning: 0, danger: 0, skipped: 0 });
+  });
+
+  it('counts top-level result set entries', () => {
+    const result = makeResult({
+      Results: {
+        check1: {
+          ID: 'check1',
+          Message: 'ok',
+          Details: [],
+          Success: true,
+          Severity: 'warning',
+          Category: 'Security',
+        },
+        check2: {
+          ID: 'check2',
+          Message: 'bad',
+          Details: [],
+          Success: false,
+          Severity: 'danger',
+          Category: 'Security',
+        },
+      },
+    });
+    const counts = countResults(makeAuditData([result]));
+    expect(counts.total).toBe(2);
+    expect(counts.pass).toBe(1);
+    expect(counts.danger).toBe(1);
+    expect(counts.warning).toBe(0);
+    expect(counts.skipped).toBe(0);
+  });
+
+  it('counts skipped (severity=ignore, success=false) entries', () => {
+    const result = makeResult({
+      Results: {
+        skipped1: {
+          ID: 'skipped1',
+          Message: 'skipped',
+          Details: [],
+          Success: false,
+          Severity: 'ignore',
+          Category: 'Security',
+        },
+      },
+    });
+    const counts = countResults(makeAuditData([result]));
+    expect(counts.total).toBe(1);
+    expect(counts.skipped).toBe(1);
+    expect(counts.pass).toBe(0);
+  });
+
+  it('counts PodResult and ContainerResults', () => {
+    const result = makeResult({
+      Results: {
+        top: {
+          ID: 'top',
+          Message: 'ok',
+          Details: [],
+          Success: true,
+          Severity: 'warning',
+          Category: 'Reliability',
+        },
+      },
+      PodResult: {
+        Name: 'pod-1',
+        Results: {
+          podCheck: {
+            ID: 'podCheck',
+            Message: 'warn',
+            Details: [],
+            Success: false,
+            Severity: 'warning',
+            Category: 'Reliability',
+          },
+        },
+        ContainerResults: [
+          {
+            Name: 'container-1',
+            Results: {
+              containerCheck: {
+                ID: 'containerCheck',
+                Message: 'danger',
+                Details: [],
+                Success: false,
+                Severity: 'danger',
+                Category: 'Security',
+              },
+            },
+          },
+        ],
+      },
+    });
+    const counts = countResults(makeAuditData([result]));
+    expect(counts.total).toBe(3);
+    expect(counts.pass).toBe(1);
+    expect(counts.warning).toBe(1);
+    expect(counts.danger).toBe(1);
+  });
+
+  it('aggregates across multiple results', () => {
+    const r1 = makeResult({
+      Name: 'deploy-a',
+      Results: {
+        c1: {
+          ID: 'c1',
+          Message: '',
+          Details: [],
+          Success: true,
+          Severity: 'warning',
+          Category: 'X',
+        },
+      },
+    });
+    const r2 = makeResult({
+      Name: 'deploy-b',
+      Results: {
+        c2: {
+          ID: 'c2',
+          Message: '',
+          Details: [],
+          Success: false,
+          Severity: 'warning',
+          Category: 'X',
+        },
+      },
+    });
+    const counts = countResults(makeAuditData([r1, r2]));
+    expect(counts.total).toBe(2);
+    expect(counts.pass).toBe(1);
+    expect(counts.warning).toBe(1);
+  });
+});
+
+describe('countResultsForItems', () => {
+  it('works on a subset of results', () => {
+    const results: Result[] = [
+      makeResult({
+        Results: {
+          a: {
+            ID: 'a',
+            Message: '',
+            Details: [],
+            Success: false,
+            Severity: 'danger',
+            Category: 'X',
+          },
+        },
+      }),
+    ];
+    const counts = countResultsForItems(results);
+    expect(counts.danger).toBe(1);
+    expect(counts.total).toBe(1);
+  });
+});
+
+// --- getNamespaces ---
+
+describe('getNamespaces', () => {
+  it('returns empty array for no results', () => {
+    expect(getNamespaces(makeAuditData([]))).toEqual([]);
+  });
+
+  it('returns sorted unique namespaces', () => {
+    const data = makeAuditData([
+      makeResult({ Namespace: 'beta' }),
+      makeResult({ Namespace: 'alpha' }),
+      makeResult({ Namespace: 'beta' }),
+      makeResult({ Namespace: 'gamma' }),
+    ]);
+    expect(getNamespaces(data)).toEqual(['alpha', 'beta', 'gamma']);
+  });
+});
+
+// --- filterResultsByNamespace ---
+
+describe('filterResultsByNamespace', () => {
+  it('returns only results matching the namespace', () => {
+    const data = makeAuditData([
+      makeResult({ Name: 'a', Namespace: 'ns1' }),
+      makeResult({ Name: 'b', Namespace: 'ns2' }),
+      makeResult({ Name: 'c', Namespace: 'ns1' }),
+    ]);
+    const filtered = filterResultsByNamespace(data, 'ns1');
+    expect(filtered).toHaveLength(2);
+    expect(filtered.map(r => r.Name)).toEqual(['a', 'c']);
+  });
+
+  it('returns empty array for non-existent namespace', () => {
+    const data = makeAuditData([makeResult({ Namespace: 'ns1' })]);
+    expect(filterResultsByNamespace(data, 'ns-missing')).toEqual([]);
+  });
+});