feat: dead-config sweep, test suite foundation, widget settingsSchema validation

Sprint G: audited every BootstrapConfig field for a real runtime consumer
(docs/DEAD-CONFIG-AUDIT.md). Wired 3 previously-dead editable fields:
footer.logoUrl, company.address.street/contacts.phone, catalog.suggestionsEnabled.
Remaining dead fields needing a business/design decision tracked in
PRODUCT_BACKLOG.md/KNOWN-ISSUES.md, not silently left.

Sprint H: 6 new spec files (test count 57 -> 83), covering ProjectEditorFacade
(undo/redo, draft persistence, publish gating), AdminAnalyticsFacade
(never-fabricate-a-number contract), and regression coverage for this
session's carousel/hero/profile-toggle fixes.

Sprint I: widget settingsSchema (declared in widget-manifest.json, never
validated) now enforced via a new lightweight schema check in
ProjectValidator, surfaced through the existing issuesByField pipeline.
Same check reused in diagnostics so editor and diagnostics can't disagree.

Verification: tsc clean, ng build clean, 83/83 tests pass, barry-cache
validate clean (2 pre-existing unrelated warnings only).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/i18n/en.ts

@@ -565,6 +565,7 @@ export const en: Translations = {
     validationInvalidCss: 'A static page contains invalid CSS.',
     validationDuplicateRoutes: 'Two or more pages share the same route.',
     validationInvalidWidgetConfig: 'A widget is missing a required field (id, type, version, or props).',
+    validationInvalidWidgetSettings: "A widget's settings don't match what its type expects (missing or wrong-type field).",
     validationInvalidContactEmail: 'The company contact email is not a valid email address.',
     validationInvalidSocialLinkUrl: 'One or more footer social links have an invalid URL.',
     validationIncompletePaymentIcon: 'A footer payment icon is missing its image or alt text.',
@@ -1224,6 +1225,9 @@ export const en: Translations = {
     unknownWidgetTypeTitle: 'Unknown widget type',
     unknownWidgetTypeDescription: 'Widget type is not present in widget manifest.',
     unknownWidgetTypeResolution: 'Register widget in manifest or remove invalid widget config.',
+    widgetSettingsSchemaMismatchTitle: 'Widget settings do not match manifest schema',
+    widgetSettingsSchemaMismatchDescription: 'Widget props do not satisfy the settingsSchema declared for this widget type.',
+    widgetSettingsSchemaMismatchResolution: 'Fix the widget props in the editor to match the required fields/types, or update the manifest schema.',
     duplicateIdTitle: 'Duplicate identifier',
     duplicatePageIdDescription: 'Duplicate page id detected.',
     duplicateSectionIdDescription: 'Duplicate section id detected.',