chore(cleanup): delete unrouted legacy pages, update docs

pages/category, pages/search, pages/item-detail, pages/info/**,
pages/legal/** (40+ files) were entirely unrouted dead code:
- category/:id, category/:id/items, search all redirect/route to
  CatalogContainerComponent
- product/:id routes to ProductDetailsContainerComponent, not item-detail
- cmsContentRoutes (meant to route info/legal) is a literal empty array;
  static/legal content is served by the CMS-driven :staticPath ->
  StaticPageComponent route instead

dynamic-renderer/ is unrelated and stays - confirmed active, it's the
live homepage rendering pipeline (HomeComponent -> WebsiteRuntimeFacade
-> PageRendererService/PageResolverService -> DynamicPageLayoutComponent).

Updated docs/TODO.md, docs/KNOWN-ISSUES.md, docs/FRONTEND-ROADMAP.md,
docs/PROJECT_INDEX.md to reflect the resolution.

docs/TODO.md

@@ -4,7 +4,7 @@ Checklist of everything documented as open/remaining across the docs, verified a
 
 ## Critical
 
-- [ ] `pages/category`, `pages/search`, `pages/item-detail`, `pages/info/**`, `pages/legal/**` (40+ files) — unrouted dead code, `cmsContentRoutes` in `app.routes.ts` is a literal empty array (verified still empty). Needs wire-up-or-delete decision — deliberately not resolved, out of "mechanical fix" scope.
+- [x] `pages/category`, `pages/search`, `pages/item-detail`, `pages/info/**`, `pages/legal/**` (40+ files) — unrouted dead code. Resolved 2026-07-25 (RC-02 task 6): deleted, decision was delete (routes already served by `catalog-container`/`product-details-container`; info/legal superseded by CMS-driven `static-page` component).
 - [x] No `canDeactivate` guard on `admin/products/:id/edit` — fixed 2026-07-25 (`adminProductDirtyGuard`, mirrors categories).
 
 ## Backend — skipped, doing together