feat: add billing core models

apps/users/admin.py

@@ -1,7 +1,7 @@
 from django.contrib import admin
 from django.contrib.auth.admin import UserAdmin as DjangoUserAdmin
 
-from .models import User
+from .models import ApiKey, User, UserWallet
 
 
 @admin.register(User)
@@ -20,3 +20,55 @@ class UserAdmin(DjangoUserAdmin):
     )
     list_filter = DjangoUserAdmin.list_filter + ("status",)
     search_fields = ("username", "email", "payment_user_id")
+
+
+@admin.register(UserWallet)
+class UserWalletAdmin(admin.ModelAdmin):
+    list_display = ("user", "points_balance", "updated_at")
+    search_fields = ("user__username", "user__email")
+    readonly_fields = ("user", "points_balance", "created_at", "updated_at")
+    ordering = ("user__username",)
+
+    def has_add_permission(self, request):
+        return False
+
+    def has_delete_permission(self, request, obj=None):
+        return False
+
+
+@admin.register(ApiKey)
+class ApiKeyAdmin(admin.ModelAdmin):
+    list_display = ("key_prefix", "user", "name", "status", "last_used_at", "created_at")
+    list_filter = ("status", "created_at")
+    search_fields = ("key_prefix", "user__username", "user__email", "name")
+    readonly_fields = (
+        "user",
+        "key_prefix",
+        "key_hash_masked",
+        "last_used_at",
+        "created_at",
+        "updated_at",
+    )
+    fields = (
+        "user",
+        "name",
+        "status",
+        "key_prefix",
+        "key_hash_masked",
+        "last_used_at",
+        "created_at",
+        "updated_at",
+    )
+    ordering = ("-created_at", "-id")
+
+    @admin.display(description="key hash")
+    def key_hash_masked(self, obj):
+        if not obj.key_hash:
+            return ""
+        return f"{obj.key_hash[:8]}...{obj.key_hash[-6:]}"
+
+    def has_add_permission(self, request):
+        return False
+
+    def has_delete_permission(self, request, obj=None):
+        return False