feat: add admin settings UI and integrate dynamic configuration

Add settings page with 4 tabs (Logo, Company, Visibility, Theme) for
managing company branding, social links, sidebar section visibility, and
color themes. Integrate settings store globally so sidebar, footer,
header, and theme respond to admin configuration. Add active/dedicated
customer stat cards to dashboard. Wire up quick-call contacts and
Google review links from settings.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/pages/admin/routes.ts

@@ -7,6 +7,7 @@ const PromoCreate = () => import('../admin/promo/create.vue');
 const PromoEdit = () => import('../admin/promo/edit.vue');
 
 const StatsHome = () => import('../admin/stats/StatsHome.vue');
+const SettingsPage = () => import('../admin/settings/SettingsPage.vue');
 
 
 const adminRoutes = [
@@ -37,6 +38,11 @@ const adminRoutes = [
         name: 'promo',
         component: Promo,
     },
+    {
+        path: '/settings',
+        name: 'settings',
+        component: SettingsPage,
+    },
 
 ]