feat(builder): implement professional content management experience

Content dashboard with real published/draft/SEO-health/completion metrics and a recommended-next-action; static pages editor rebuilt as visual page cards (icon/status/SEO badge/last edited) with legal pages surfaced first; full-page editor grouped into Content/SEO/Sharing/Advanced tabs, raw HTML moved behind an Advanced disclosure; hero image now supports alt text and caption; content-health-widget is a reusable checklist+completion component.

src/app/i18n/en.ts

@@ -937,6 +937,55 @@ export const en: Translations = {
     previewMobile: 'Mobile',
     previewToggle: 'Preview',
   },
+  contentManagement: {
+    publishedPages: 'Published pages',
+    draftPages: 'Draft pages',
+    missingLegalPages: 'Missing legal pages',
+    seoHealth: 'SEO health',
+    lastEdited: 'Last edited',
+    lastEditedNever: 'Never',
+    completionLabel: 'Completion',
+    recommendedNext: 'Recommended next step',
+    recommendAddTitles: 'Some pages are missing a title in at least one language.',
+    recommendFixSeo: 'A page has an SEO field that needs fixing (canonical/OG image URL or robots value).',
+    recommendPublish: 'A required legal page is still a draft — publish it so customers can see it.',
+    recommendNone: 'Nice work — your content is in good shape.',
+    openAction: 'Open',
+    backToPages: 'Back to pages',
+    groupContent: 'Content',
+    groupSeo: 'SEO',
+    groupSharing: 'Sharing',
+    groupAdvanced: 'Advanced',
+    groupAdvancedHtml: 'Raw HTML (advanced)',
+    seoExplainDesc: 'This is what shows up in search results — a clear title and description help customers find this page.',
+    seoTitleHelp: 'The headline shown in search results. Keep it short and descriptive.',
+    seoDescriptionHelp: 'A short summary shown under the title in search results.',
+    seoCanonicalHelp: 'The official web address for this page, used to avoid duplicate-content issues.',
+    seoRobotsHelp: 'Controls whether search engines are allowed to list this page.',
+    sharingExplain: 'This is how the page looks when shared on social media (Facebook, Twitter/X, and others).',
+    mediaSelect: 'Choose image',
+    mediaReplace: 'Replace',
+    mediaRemove: 'Remove',
+    mediaAlt: 'Alt text',
+    mediaCaption: 'Caption',
+    emptyStateGuideTitle: 'Start building your storefront pages',
+    emptyStateGuideBody: 'Legal pages like About, Privacy, and Terms build trust with customers. We recommend publishing About, Contacts, Privacy, and Terms first, then adding Cookies, Delivery, Returns, and FAQ.',
+    seoStatusGood: 'SEO good',
+    seoStatusPartial: 'SEO partial',
+    seoStatusWarning: 'SEO issue',
+    seoStatusMissing: 'SEO missing',
+    needsAttention: 'Needs attention',
+    legal: {
+      about: { label: 'About', why: 'Tells customers who you are and builds trust before they buy.' },
+      contacts: { label: 'Contacts', why: 'Gives customers a way to reach you with questions or issues.' },
+      privacy: { label: 'Privacy', why: 'Explains how customer data is handled — often legally required.' },
+      terms: { label: 'Terms', why: 'Sets the rules for using your store — protects you and your customers.' },
+      cookies: { label: 'Cookies', why: 'Discloses cookie usage, required in many regions.' },
+      delivery: { label: 'Delivery', why: 'Sets clear shipping expectations and reduces support requests.' },
+      returns: { label: 'Returns', why: 'Explains your refund policy and builds purchase confidence.' },
+      faq: { label: 'FAQ', why: 'Answers common questions before customers have to ask.' },
+    },
+  },
   widgets: {
     unavailable: 'Widget unavailable',
   },