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/translations.ts

@@ -563,6 +563,7 @@ export interface Translations {
     validationInvalidCss: string;
     validationDuplicateRoutes: string;
     validationInvalidWidgetConfig: string;
+    validationInvalidWidgetSettings: string;
     validationInvalidContactEmail: string;
     validationInvalidSocialLinkUrl: string;
     validationIncompletePaymentIcon: string;
@@ -1223,6 +1224,9 @@ export interface Translations {
     unknownWidgetTypeTitle: string;
     unknownWidgetTypeDescription: string;
     unknownWidgetTypeResolution: string;
+    widgetSettingsSchemaMismatchTitle: string;
+    widgetSettingsSchemaMismatchDescription: string;
+    widgetSettingsSchemaMismatchResolution: string;
     duplicateIdTitle: string;
     duplicatePageIdDescription: string;
     duplicateSectionIdDescription: string;