refactor(marketing-pages): factory-style use cases + per-use-case controllers

- Use cases (get-page-by-slug, get-site-settings) → factory functions with I*UseCase aliases
- Controllers split: pages.controller.ts → 2 single-responsibility files
- DI module wires factories with .toDynamicValue()
- tRPC router resolves controllers via container

Refactor log: §2, §3, §4.1, §4.2, §5.1
Spec: §6.3

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

packages/marketing-pages/src/di/module.ts

@@ -4,6 +4,22 @@ import type { IPagesRepository } from "../application/repositories/pages.reposit
 import type { ISiteSettingsRepository } from "../application/repositories/site-settings.repository.interface";
 import { MockPagesRepository } from "../infrastructure/repositories/pages.repository.mock";
 import { MockSiteSettingsRepository } from "../infrastructure/repositories/site-settings.repository.mock";
+import {
+  getPageBySlugUseCase,
+  type IGetPageBySlugUseCase,
+} from "../application/use-cases/get-page-by-slug.use-case";
+import {
+  getSiteSettingsUseCase,
+  type IGetSiteSettingsUseCase,
+} from "../application/use-cases/get-site-settings.use-case";
+import {
+  getPageBySlugController,
+  type IGetPageBySlugController,
+} from "../interface-adapters/controllers/get-page-by-slug.controller";
+import {
+  getSiteSettingsController,
+  type IGetSiteSettingsController,
+} from "../interface-adapters/controllers/get-site-settings.controller";
 import { MARKETING_PAGES_SYMBOLS } from "./symbols";
 
 export const MarketingPagesModule = new ContainerModule(
@@ -14,5 +30,39 @@ export const MarketingPagesModule = new ContainerModule(
     bind<ISiteSettingsRepository>(
       MARKETING_PAGES_SYMBOLS.ISiteSettingsRepository,
     ).to(MockSiteSettingsRepository);
+
+    bind<IGetPageBySlugUseCase>(MARKETING_PAGES_SYMBOLS.IGetPageBySlugUseCase).toDynamicValue(
+      (ctx) =>
+        getPageBySlugUseCase(
+          ctx.container.get<IPagesRepository>(MARKETING_PAGES_SYMBOLS.IPagesRepository),
+        ),
+    );
+
+    bind<IGetSiteSettingsUseCase>(MARKETING_PAGES_SYMBOLS.IGetSiteSettingsUseCase).toDynamicValue(
+      (ctx) =>
+        getSiteSettingsUseCase(
+          ctx.container.get<ISiteSettingsRepository>(
+            MARKETING_PAGES_SYMBOLS.ISiteSettingsRepository,
+          ),
+        ),
+    );
+
+    bind<IGetPageBySlugController>(
+      MARKETING_PAGES_SYMBOLS.IGetPageBySlugController,
+    ).toDynamicValue((ctx) =>
+      getPageBySlugController(
+        ctx.container.get<IGetPageBySlugUseCase>(MARKETING_PAGES_SYMBOLS.IGetPageBySlugUseCase),
+      ),
+    );
+
+    bind<IGetSiteSettingsController>(
+      MARKETING_PAGES_SYMBOLS.IGetSiteSettingsController,
+    ).toDynamicValue((ctx) =>
+      getSiteSettingsController(
+        ctx.container.get<IGetSiteSettingsUseCase>(
+          MARKETING_PAGES_SYMBOLS.IGetSiteSettingsUseCase,
+        ),
+      ),
+    );
   },
 );