[AZ-456] Test infrastructure: Vitest + MSW + Playwright + scripts

Scaffolds the Blackbox test project per AZ-456 / environment.md across
the three profiles:

- fast  : Vitest 3.x + jsdom + MSW 2.x + RTL/jest-dom; tests/setup.ts
          boots the MSW Node server with onUnhandledRequest:'error',
          afterEach resets handlers, clears bearer + navigate-to-login
          spy. Default handlers ship for every suite service plus OWM
          and tile stand-ins. Fixtures mirror seed_* in test-data.md.
- e2e   : Playwright ^1.49 with chromium + firefox projects against the
          suite docker-compose stack; owm-stub + tile-stub Bun servers,
          playwright-runner image, seeds.sql for the test-db.
- static: scripts/run-tests.sh extended — tsc --noEmit (test config),
          vite build, ripgrep checks (with grep -r fallback), CSV
          report at test-output/static-report.csv per AC-7 columns.

Smoke tests cover AC-3, AC-4 (fast, 5 tests, PASS) and AC-1, AC-2,
AC-5, AC-8 (e2e, gated by Risk 4 docker availability). Static profile
(13 checks) PASS — STC-SEC1 (no literal OWM key) lifted from
QUARANTINE per AZ-447 with a narrowed pattern.

Files:
  +24 tests/**, +10 e2e/**, +vitest.config.ts, +tsconfig.test.json
  ~package.json (test scripts + devDeps for vitest, @testing-library/*,
   msw, @playwright/test, jsdom, @types/node, @vitest/coverage-v8)
  ~scripts/run-tests.sh, scripts/run-performance-tests.sh — switched
   RESULTS_DIR to test-output/, compose path to project-local
  ~.gitignore — added /test-output/

Verification:
  bun run test:fast        → 11 / 11 PASS
  ./scripts/run-tests.sh   → static 13/13 + fast 11/11 PASS, exit 0

Tracker: AZ-456 → In Testing.
Co-authored-by: Cursor <cursoragent@cursor.com>

tests/fixtures/seed_annotations.ts

@@ -0,0 +1,82 @@
+import type { AnnotationListItem } from '../../src/types'
+import { AnnotationSource, AnnotationStatus, Affiliation, CombatReadiness } from '../../src/types'
+
+// Annotations exercising the source / status enums + the splitTile path
+// (AC-39): one with a valid splitTile string, one malformed.
+
+export const seedAnnotations: AnnotationListItem[] = [
+  {
+    id: 'ann-1',
+    mediaId: 'media-3',
+    time: null,
+    createdDate: '2026-05-03T14:30:00Z',
+    userId: 'user-alice',
+    source: AnnotationSource.AI,
+    status: AnnotationStatus.Created,
+    isSplit: false,
+    splitTile: null,
+    detections: [
+      {
+        id: 'det-1',
+        classNum: 0,
+        label: 'class-0',
+        confidence: 0.92,
+        affiliation: Affiliation.Hostile,
+        combatReadiness: CombatReadiness.Ready,
+        centerX: 0.4,
+        centerY: 0.5,
+        width: 0.1,
+        height: 0.15,
+      },
+    ],
+  },
+  {
+    id: 'ann-2',
+    mediaId: 'media-3',
+    time: null,
+    createdDate: '2026-05-03T14:32:00Z',
+    userId: 'user-alice',
+    source: AnnotationSource.AI,
+    status: AnnotationStatus.Edited,
+    isSplit: true,
+    splitTile: '3 0.5 0.5 0.2 0.2',
+    detections: [
+      {
+        id: 'det-2',
+        classNum: 1,
+        label: 'class-1',
+        confidence: 0.88,
+        affiliation: Affiliation.Friendly,
+        combatReadiness: CombatReadiness.NotReady,
+        centerX: 0.5,
+        centerY: 0.5,
+        width: 0.2,
+        height: 0.2,
+      },
+    ],
+  },
+  {
+    id: 'ann-3',
+    mediaId: 'media-5',
+    time: '00:01:00',
+    createdDate: '2026-05-04T10:15:00Z',
+    userId: 'user-bob',
+    source: AnnotationSource.Manual,
+    status: AnnotationStatus.Validated,
+    isSplit: false,
+    splitTile: null,
+    detections: [],
+  },
+  {
+    id: 'ann-4',
+    mediaId: 'media-5',
+    time: '00:01:30',
+    createdDate: '2026-05-04T10:20:00Z',
+    userId: 'user-bob',
+    source: AnnotationSource.Manual,
+    status: AnnotationStatus.Edited,
+    isSplit: true,
+    splitTile: 'garbage',
+    detections: [],
+  },
+]