Enhance loading skeletons and breadcrumbs

- Add content-m matching loading skeletons for ParkDetail, RideDetail, CompanyDetail, etc., replacing generic spinners to preserve layout during load
- Remove redundant Back to Parent Entity buttons in detail pages in favor of breadcrumb navigation
- Prepare groundwork for breadcrumbs across detail pages to improve cohesion and navigation

src/pages/DesignerDetail.tsx

@@ -1,6 +1,7 @@
 import { useState, useEffect, lazy, Suspense } from 'react';
 import { useParams, useNavigate } from 'react-router-dom';
 import { EntityBreadcrumb } from '@/components/navigation/EntityBreadcrumb';
+import { CompanyDetailSkeleton } from '@/components/loading/CompanyDetailSkeleton';
 import { Header } from '@/components/layout/Header';
 import { getBannerUrls } from '@/lib/cloudflareImageUtils';
 import { Button } from '@/components/ui/button';
@@ -150,12 +151,7 @@ export default function DesignerDetail() {
     return (
       <div className="min-h-screen bg-background">
         <Header />
-        <div className="container mx-auto px-4 py-8">
-          <div className="animate-pulse space-y-6">
-            <div className="h-64 bg-muted rounded-lg"></div>
-            <div className="h-8 bg-muted rounded w-1/2"></div>
-          </div>
-        </div>
+        <CompanyDetailSkeleton />
       </div>
     );
   }
@@ -191,13 +187,8 @@ export default function DesignerDetail() {
           className="mb-4"
         />
         
-        {/* Back Button and Edit Button */}
-        <div className="flex items-center justify-between mb-6">
-          <Button variant="ghost" onClick={() => navigate('/designers')}>
-            <ArrowLeft className="w-4 h-4 mr-2" />
-            Back to Designers
-          </Button>
-          
+        {/* Edit Button */}
+        <div className="flex justify-end mb-6">
           <Button 
             variant="outline"
             onClick={() => requireAuth(() => setIsEditModalOpen(true), "Sign in to edit this designer")}