Rebuild Home and Editor pages with simplified inline styles

- Replace Element Plus components with pure HTML/CSS
- Use inline styles for reliable rendering
- Fix templates URL duplicate path issue
- Insert template data (4 templates) via Django shell
- Clear Vite cache and restart both servers

backend/apps/templates/urls.py

@@ -1,9 +1,7 @@
 from django.urls import path
 from .views import template_list, template_detail
 
-app_name = 'templates'
-
 urlpatterns = [
-    path('templates/', template_list, name='template-list'),
-    path('templates/<str:pk>/', template_detail, name='template-detail'),
+    path('', template_list, name='template-list'),
+    path('<str:pk>/', template_detail, name='template-detail'),
 ]