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

backend/apps/email_service/admin.py

@@ -0,0 +1,39 @@
+from django.contrib import admin
+from django.contrib.sites.models import Site
+from .models import EmailConfiguration
+
+
+@admin.register(EmailConfiguration)
+class EmailConfigurationAdmin(admin.ModelAdmin):
+    list_display = (
+        "site",
+        "from_name",
+        "from_email",
+        "reply_to",
+        "updated_at",
+    )
+    list_select_related = ("site",)
+    search_fields = ("site__domain", "from_name", "from_email", "reply_to")
+    readonly_fields = ("created_at", "updated_at")
+    fieldsets = (
+        (None, {"fields": ("site",)}),
+        (
+            "Email Settings",
+            {
+                "fields": ("api_key", ("from_name", "from_email"), "reply_to"),
+                "description": 'Configure the email settings. The From field in emails will appear as "From Name <from@email.com>"',
+            },
+        ),
+        (
+            "Timestamps",
+            {"fields": ("created_at", "updated_at"), "classes": ("collapse",)},
+        ),
+    )
+
+    def get_queryset(self, request):
+        return super().get_queryset(request).select_related("site")
+
+    def formfield_for_foreignkey(self, db_field, request, **kwargs):
+        if db_field.name == "site":
+            kwargs["queryset"] = Site.objects.all().order_by("domain")
+        return super().formfield_for_foreignkey(db_field, request, **kwargs)