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/blog/src/integrations/api/router.test.ts

@@ -4,6 +4,7 @@ import { BLOG_SYMBOLS } from "../../di/symbols";
 import { MockArticlesRepository } from "../../infrastructure/repositories/mock-articles.repository";
 import type { IArticlesRepository } from "../../application/repositories/articles-repository.interface";
 import { blogRouter } from "./router";
+import { articleFactory } from "../../__factories__/article.factory.js";
 
 describe("blogRouter", () => {
   let repo: MockArticlesRepository;
@@ -26,17 +27,9 @@ describe("blogRouter", () => {
   });
 
   it("articleBySlug returns the article when present", async () => {
-    const now = new Date();
-    await repo.createArticle({
-      id: "1",
-      title: "T",
-      slug: "t",
-      content: null,
-      status: "draft",
-      authorId: "u1",
-      createdAt: now,
-      updatedAt: now,
-    });
+    await repo.createArticle(
+      articleFactory.build({ id: "1", title: "T", slug: "t", authorId: "u1" }),
+    );
 
     const caller = blogRouter.createCaller({});
     const result = await caller.articleBySlug({ slug: "t" });