refactor(navigation): factory-style use case + controller

- Use case (get-header) → factory function with IGetHeaderUseCase alias
- Controller renamed header.controller.ts → get-header.controller.ts (verb-noun); converted to factory function with IGetHeaderController alias
- DI module wires factories with .toDynamicValue()
- tRPC router resolves controller via container
- Use case + controller tests refactored to direct factory injection (no container rebinding)
- container.test.ts verifies IGetHeaderUseCase + IGetHeaderController symbols

Refactor log: §1, §4.1, §4.2, §5.1
Spec: §6.4

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

packages/navigation/src/di/module.ts

@@ -2,10 +2,32 @@ import { ContainerModule, type interfaces } from "inversify";
 
 import type { IHeaderRepository } from "../application/repositories/header.repository.interface";
 import { MockHeaderRepository } from "../infrastructure/repositories/header.repository.mock";
+import {
+  getHeaderUseCase,
+  type IGetHeaderUseCase,
+} from "../application/use-cases/get-header.use-case";
+import {
+  getHeaderController,
+  type IGetHeaderController,
+} from "../interface-adapters/controllers/get-header.controller";
 import { NAVIGATION_SYMBOLS } from "./symbols";
 
 export const NavigationModule = new ContainerModule((bind: interfaces.Bind) => {
   bind<IHeaderRepository>(NAVIGATION_SYMBOLS.IHeaderRepository).to(
     MockHeaderRepository,
   );
+
+  bind<IGetHeaderUseCase>(NAVIGATION_SYMBOLS.IGetHeaderUseCase).toDynamicValue(
+    (ctx) =>
+      getHeaderUseCase(
+        ctx.container.get<IHeaderRepository>(NAVIGATION_SYMBOLS.IHeaderRepository),
+      ),
+  );
+
+  bind<IGetHeaderController>(NAVIGATION_SYMBOLS.IGetHeaderController).toDynamicValue(
+    (ctx) =>
+      getHeaderController(
+        ctx.container.get<IGetHeaderUseCase>(NAVIGATION_SYMBOLS.IGetHeaderUseCase),
+      ),
+  );
 });