fix(features): address Task 3 code review feedback

- Add navItemFactory to navigation (spec §5.1 — was missing)
- Refactor blog/router.test.ts to use articleFactory (eliminate new Date())
- headerFactory uses sequence for logoId (deterministic buildList output)
- Align media/tsconfig.json with other features (jsx + tests/ include)
- Refactor auth/container.test.ts to use userFactory

Reviewer: superpowers:code-reviewer (Task 3 of Plan 7).

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

packages/media/tsconfig.json

@@ -4,10 +4,11 @@
     "outDir": "dist",
     "rootDir": ".",
     "lib": ["ES2022", "DOM"],
+    "jsx": "preserve",
     "paths": {
       "@/*": ["./src/*"]
     }
   },
-  "include": ["src/**/*"],
+  "include": ["src/**/*", "tests/**/*"],
   "exclude": ["node_modules", "dist"]
 }