refactor(features): rename mock/payload/interface files per Lazar pattern

Convention now: <name>.repository.{ts,mock.ts,interface.ts}.
Renames .mock prefix to .mock suffix; drops .payload prefix from real
impls (canonical name = real impl); dot-separates the .repository
qualifier in interface filenames. Class names follow suit:
PayloadXRepository → XRepository; Mock* unchanged.

Refactor log: §1, §3
Spec: §9.1

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

packages/navigation/src/infrastructure/repositories/header.repository.test.ts

@@ -0,0 +1,89 @@
+import { describe, it, expect, vi } from "vitest";
+import { HeaderRepository } from "@/infrastructure/repositories/header.repository";
+import { headerRepositoryContract, CONTRACT_HEADER_SEED } from "@/__contracts__/header-repository.contract";
+import { stubPayloadConfig } from "@repo/core-testing/payload/stub-config";
+
+// ---------------------------------------------------------------------------
+// In-memory Payload stub for header (Global)
+// ---------------------------------------------------------------------------
+
+function buildHeaderStub(overrides?: Record<string, unknown>) {
+  return {
+    findGlobal: vi.fn(async () => {
+      return { ...CONTRACT_HEADER_SEED, ...overrides };
+    }),
+  };
+}
+
+vi.mock("payload", () => ({
+  getPayload: vi.fn(),
+}));
+
+// ---------------------------------------------------------------------------
+// Contract suite
+// ---------------------------------------------------------------------------
+
+describe("HeaderRepository", () => {
+  describe("contract", () => {
+    headerRepositoryContract.run(async () => {
+      const stub = buildHeaderStub();
+      const { getPayload } = await import("payload");
+      (getPayload as ReturnType<typeof vi.fn>).mockResolvedValue(stub);
+      return new HeaderRepository(stubPayloadConfig);
+    });
+  });
+
+  // ---------------------------------------------------------------------------
+  // Logo field branch coverage
+  // ---------------------------------------------------------------------------
+
+  it("resolves logoId from a relation object ({ id })", async () => {
+    const stub = buildHeaderStub({ logo: { id: "abc-123" } });
+    const { getPayload } = await import("payload");
+    (getPayload as ReturnType<typeof vi.fn>).mockResolvedValue(stub);
+
+    const repo = new HeaderRepository(stubPayloadConfig);
+    const header = await repo.getHeader();
+
+    expect(header.logoId).toBe("abc-123");
+  });
+
+  it("resolves logoId from a scalar id (string)", async () => {
+    const stub = buildHeaderStub({ logo: "scalar-id" });
+    const { getPayload } = await import("payload");
+    (getPayload as ReturnType<typeof vi.fn>).mockResolvedValue(stub);
+
+    const repo = new HeaderRepository(stubPayloadConfig);
+    const header = await repo.getHeader();
+
+    expect(header.logoId).toBe("scalar-id");
+  });
+
+  it("resolves logoId as undefined when logo is null", async () => {
+    const stub = buildHeaderStub({ logo: null });
+    const { getPayload } = await import("payload");
+    (getPayload as ReturnType<typeof vi.fn>).mockResolvedValue(stub);
+
+    const repo = new HeaderRepository(stubPayloadConfig);
+    const header = await repo.getHeader();
+
+    expect(header.logoId).toBeUndefined();
+  });
+
+  it("maps null item fields to empty strings and false", async () => {
+    const stub = {
+      findGlobal: vi.fn(async () => ({
+        items: [{ label: null, href: null, external: null }],
+      })),
+    };
+    const { getPayload } = await import("payload");
+    (getPayload as ReturnType<typeof vi.fn>).mockResolvedValue(stub);
+
+    const repo = new HeaderRepository(stubPayloadConfig);
+    const header = await repo.getHeader();
+
+    expect(header.items[0]?.label).toBe("");
+    expect(header.items[0]?.href).toBe("");
+    expect(header.items[0]?.external).toBe(false);
+  });
+});