feat: complete monorepo structure with frontend and shared resources

- Add complete backend/ directory with full Django application
- Add frontend/ directory with Vite + TypeScript setup ready for Next.js
- Add comprehensive shared/ directory with:
  - Complete documentation and memory-bank archives
  - Media files and avatars (letters, park/ride images)
  - Deployment scripts and automation tools
  - Shared types and utilities
- Add architecture/ directory with migration guides
- Configure pnpm workspace for monorepo development
- Update .gitignore to exclude .django_tailwind_cli/ build artifacts
- Preserve all historical documentation in shared/docs/memory-bank/
- Set up proper structure for full-stack development with shared resources

shared/media/admin.py

@@ -0,0 +1,28 @@
+from django.contrib import admin
+from django.utils.html import format_html
+from .models import Photo
+
+
+@admin.register(Photo)
+class PhotoAdmin(admin.ModelAdmin):
+    list_display = (
+        "thumbnail_preview",
+        "content_type",
+        "content_object",
+        "caption",
+        "is_primary",
+        "created_at",
+    )
+    list_filter = ("content_type", "is_primary", "created_at")
+    search_fields = ("caption", "alt_text")
+    readonly_fields = ("thumbnail_preview",)
+
+    def thumbnail_preview(self, obj):
+        if obj.image:
+            return format_html(
+                '<img src="{}" style="max-height: 50px; max-width: 100px;" />',
+                obj.image.url,
+            )
+        return "No image"
+
+    thumbnail_preview.short_description = "Thumbnail"