Replace global duplicate-slug/empty-title banners with per-page indicators:
a danger badge next to the offending page's heading, plus inline error text
on the specific pageId/slug app-form-field. Made ContentPageService.normalizeSlug
public (was private) so the component can match validation results to a given
page's normalized slug without duplicating the normalization logic.
Verified in browser: setting a duplicate slug live shows both the header
badge and the inline field error immediately.
Completes Sprint 3 (Static Page Generator): DRY cleanup, Design System
adoption, SEO field coverage, per-page validation UX.
ContentPage.seo (title/description/keywords/canonical/ogTitle/ogDescription/
ogImage) was already modeled and serialized to bootstrap JSON but had no
editable UI. Added updateSeo() to the component and a translated SEO fieldset
using app-form-field/app-input. Added seoSection/seoTitle/seoDescription/
seoKeywords/seoCanonical/seoOgTitle/seoOgDescription/seoOgImage translation
keys to en/ru/hy and the Translations type.
Verified in browser at /edit/static-pages: SEO section renders with
translated labels for all three mock pages.
Replace raw button/input elements with app-button, app-input, app-card,
app-form-field, app-badge, app-empty-state across the static pages CMS editor.
Checkboxes left native (no checkbox primitive built yet).
Also fix pre-existing bug in ContentPageService.normalizePages: iterating
Object.values(config) lost the record key, so legacy-shaped bootstrap entries
without explicit id/slug fields (e.g. mock bootstrap.json's about-us,
privacy-policy, terms-of-service) crashed normalizeSlug(undefined). Now
falls back to the record key for id/slug/title.
Verified in browser at /edit/static-pages: renders correctly, primitives
styled per tenant CSS vars, no console errors after fix.
StaticPagesEditorComponent.persist() hand-rolled the same title/html/route
mapping already implemented in ContentPageService.toBootstrapRecord(), with
subtly different behavior (always wrote empty-string html entries per locale
instead of omitting them, no title fallback). Added ContentManagementFacade.serializePages()
as a thin passthrough and switched the component to use the single canonical
implementation.
