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/RideModelDetail.tsx

@@ -1,6 +1,8 @@
 import { useState, useEffect, useCallback, lazy, Suspense } from 'react';
 import { useParams, useNavigate } from 'react-router-dom';
 import { Header } from '@/components/layout/Header';
+import { EntityBreadcrumb } from '@/components/navigation/EntityBreadcrumb';
+import { CompanyDetailSkeleton } from '@/components/loading/CompanyDetailSkeleton';
 import { Button } from '@/components/ui/button';
 import { Badge } from '@/components/ui/badge';
 import { Card, CardContent } from '@/components/ui/card';
@@ -167,17 +169,7 @@ export default function RideModelDetail() {
     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-12 bg-muted rounded w-1/3"></div>
-            <div className="h-64 bg-muted rounded"></div>
-            <div className="grid md:grid-cols-2 lg:grid-cols-3 gap-6">
-              {[...Array(6)].map((_, i) => (
-                <div key={i} className="h-48 bg-muted rounded-lg"></div>
-              ))}
-            </div>
-          </div>
-        </div>
+        <CompanyDetailSkeleton />
       </div>
     );
   }
@@ -204,12 +196,25 @@ export default function RideModelDetail() {
       <Header />
       
       <main className="container mx-auto px-4 py-8">
-        <div className="flex items-center justify-between mb-6">
-          <Button variant="ghost" onClick={() => navigate(`/manufacturers/${manufacturerSlug}/models`)}>
-            <ArrowLeft className="w-4 h-4 mr-2" />
-            Back to {manufacturer.name} Models
-          </Button>
-          
+        {/* Breadcrumb Navigation */}
+        <EntityBreadcrumb 
+          segments={[
+            { label: 'Manufacturers', href: '/manufacturers' },
+            { 
+              label: manufacturer.name, 
+              href: `/manufacturers/${manufacturerSlug}`,
+              showPreview: true,
+              previewType: 'company',
+              previewSlug: manufacturerSlug || ''
+            },
+            { label: 'Models', href: `/manufacturers/${manufacturerSlug}/models` },
+            { label: model.name }
+          ]}
+          className="mb-4"
+        />
+        
+        {/* Edit Button */}
+        <div className="flex justify-end mb-6">
           <Button 
             variant="outline"
             onClick={() => requireAuth(() => setIsEditModalOpen(true), "Sign in to edit this ride model")}