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>

docs/superpowers/refactor-logs/2026-05-05-lazar-pattern-conformance.md

@@ -105,6 +105,13 @@ Entity model moves (git mv — history preserved):
 - `packages/blog/src/interface-adapters/controllers/get-article-by-slug.controller.ts` — factory controller; now delegates to `getArticleBySlugUseCase` (which throws `ArticleNotFoundError`) instead of calling repo directly
 - `packages/blog/src/interface-adapters/controllers/get-article-by-slug.controller.test.ts` — 3 tests (found, not found → ArticleNotFoundError, empty slug → InputParseError)
 
+### Task 6: Marketing-pages factory refactor — new files
+
+- `packages/marketing-pages/src/interface-adapters/controllers/get-page-by-slug.controller.ts` — factory controller; replaces `getPageBySlugController` function from `pages.controller.ts`; exports `IGetPageBySlugController` type alias
+- `packages/marketing-pages/src/interface-adapters/controllers/get-page-by-slug.controller.test.ts` — 3 tests (slug found, slug not found → undefined, missing slug → InputParseError)
+- `packages/marketing-pages/src/interface-adapters/controllers/get-site-settings.controller.ts` — factory controller; replaces `getSiteSettingsController` function from `pages.controller.ts`; exports `IGetSiteSettingsController` type alias
+- `packages/marketing-pages/src/interface-adapters/controllers/get-site-settings.controller.test.ts` — 1 test (returns site settings)
+
 ### Task 2: Entities split — new error files
 
 - `packages/auth/src/entities/errors/auth.ts` — AuthenticationError, UnauthenticatedError, UnauthorizedError (split from errors.ts)
@@ -123,6 +130,11 @@ Entity model moves (git mv — history preserved):
 - `packages/blog/src/interface-adapters/controllers/articles.controller.ts` — multi-method controller replaced by 3 single-responsibility factory files (`get-articles.controller.ts`, `create-article.controller.ts`, `get-article-by-slug.controller.ts`)
 - `packages/blog/src/interface-adapters/controllers/articles.controller.test.ts` — deleted with the controller; tests rewritten in the per-controller test files
 
+### Task 6: Marketing-pages factory refactor — deleted files
+
+- `packages/marketing-pages/src/interface-adapters/controllers/pages.controller.ts` — multi-method controller replaced by 2 single-responsibility factory files (`get-page-by-slug.controller.ts`, `get-site-settings.controller.ts`)
+- `packages/marketing-pages/src/interface-adapters/controllers/pages.controller.test.ts` — deleted with the controller; tests rewritten in the per-controller test files
+
 ### Task 2: Entities split — old errors.ts files removed
 
 - `packages/auth/src/entities/errors.ts` — replaced by `errors/auth.ts` + `errors/common.ts`
@@ -134,20 +146,22 @@ Entity model moves (git mv — history preserved):
 
 ### 4.1 Use cases — factory function pattern
 
-Applied to all 3 auth use cases (`sign-in`, `sign-up`, `sign-out`) in Task 4, and all 3 blog use cases (`get-articles`, `create-article`, `get-article-by-slug` NEW) in Task 5:
+Applied to all 3 auth use cases (`sign-in`, `sign-up`, `sign-out`) in Task 4, all 3 blog use cases (`get-articles`, `create-article`, `get-article-by-slug` NEW) in Task 5, and both marketing-pages use cases (`get-page-by-slug`, `get-site-settings`) in Task 6:
 
 - Use cases are now factory functions: `(deps) => async (input) => result`
 - Each file exports `export type I*UseCase = ReturnType<typeof *UseCase>` for DI typing
 - Use cases NO LONGER call `*Container.get()` inside their bodies — all dependencies are passed as factory arguments
 - Tests construct mocks directly: `const useCase = getArticlesUseCase(repo); await useCase({ status: "draft" });`
 - NEW `getArticleBySlugUseCase`: previously the slug lookup bypassed the use case layer (controller called repo directly); now the use case owns the `ArticleNotFoundError` throw
+- marketing-pages: `getPageBySlugUseCase(pagesRepo) => async ({ slug }) => Page | undefined` and `getSiteSettingsUseCase(siteSettingsRepo) => async () => SiteSettings`
 
 ### 4.2 Controllers — one per use case
 
-Applied to all 3 auth controllers (`sign-in`, `sign-up`, `sign-out`) in Task 4; blog controllers split in Task 5:
+Applied to all 3 auth controllers (`sign-in`, `sign-up`, `sign-out`) in Task 4; blog controllers split in Task 5; marketing-pages controllers split in Task 6:
 
 - Controllers were already split for auth (one file per use case) — Task 4 refactors them to factory functions
 - Blog: the multi-method `articles.controller.ts` is deleted and replaced by 3 single-responsibility files
+- Marketing-pages: the multi-method `pages.controller.ts` is deleted and replaced by 2 single-responsibility files (`get-page-by-slug.controller.ts`, `get-site-settings.controller.ts`)
 - Factory pattern: `(useCase: I*UseCase) => async (input) => result`
 - Each exports `export type I*Controller = ReturnType<typeof *Controller>`
 - Validation (Zod `safeParse`) stays inside the controller factory; throws `InputParseError` on failure
@@ -167,7 +181,7 @@ Pattern now in place across auth, blog, marketing-pages, navigation (media skipp
 
 ### 5.1 Inversify `.toDynamicValue` bindings
 
-Applied to `packages/auth/src/di/module.ts` (Task 4) and `packages/blog/src/di/module.ts` (Task 5):
+Applied to `packages/auth/src/di/module.ts` (Task 4), `packages/blog/src/di/module.ts` (Task 5), and `packages/marketing-pages/src/di/module.ts` (Task 6):
 
 **auth:**
 - `AUTH_SYMBOLS` expanded with 6 new keys: `ISignInUseCase`, `ISignUpUseCase`, `ISignOutUseCase`, `ISignInController`, `ISignUpController`, `ISignOutController`
@@ -181,6 +195,12 @@ Applied to `packages/auth/src/di/module.ts` (Task 4) and `packages/blog/src/di/m
 - Repository binding remains `.to(MockArticlesRepository)` as the default
 - tRPC router (`integrations/api/router.ts`) updated to resolve controllers via `blogContainer.get<IXController>(BLOG_SYMBOLS.IXController)` instead of importing controllers directly
 
+**marketing-pages:**
+- `MARKETING_PAGES_SYMBOLS` expanded with 4 new keys: `IGetPageBySlugUseCase`, `IGetSiteSettingsUseCase`, `IGetPageBySlugController`, `IGetSiteSettingsController`
+- Both use cases and both controllers bound with `.toDynamicValue()` — each use case receives its own repository from the container; each controller receives its use case
+- Repository bindings remain `.to(MockPagesRepository)` and `.to(MockSiteSettingsRepository)` as defaults
+- tRPC router updated to resolve controllers via `marketingPagesContainer.get<IXController>(MARKETING_PAGES_SYMBOLS.IXController)`
+
 ### 5.2 Mock siblings registered as default bindings
 
 - `MockUsersRepository` and `MockAuthenticationService` remain the default bindings in `AuthModule`