feat: completed

cost/admin.py

@@ -0,0 +1,22 @@
+from django.contrib import admin
+
+from . import models
+
+
+@admin.register(models.CostCategory)
+class CostCategoryAdmin(admin.ModelAdmin):
+    list_display = ('id', 'merchant', 'unique_key', 'name', 'parent', 'created_at')
+    search_fields = ('name', 'unique_key')
+    list_filter = ('merchant', 'created_at')
+    ordering = ('merchant', 'name')
+
+
+@admin.register(models.CostEntry)
+class CostEntryAdmin(admin.ModelAdmin):
+    list_display = (
+        'id', 'merchant', 'category', 'amount', 'occurred_at',
+        'operator', 'source_module', 'source_id', 'created_at',
+    )
+    search_fields = ('category__name', 'source_module', 'source_id')
+    list_filter = ('merchant', 'category', 'occurred_at', 'source_module', 'created_at')
+    ordering = ('-occurred_at', '-created_at')