feat: update finance admin configuration

finance/admin.py

@@ -1,3 +1,26 @@
 from django.contrib import admin
+from .models import Transaction, Budget, Goal, Subscription
 
-# Register your models here.
+@admin.register(Transaction)
+class TransactionAdmin(admin.ModelAdmin):
+    list_display = ('user', 'merchant', 'amount', 'category', 'date')
+    list_filter = ('category', 'date', 'user')
+    search_fields = ('merchant', 'note', 'user__email')
+
+@admin.register(Budget)
+class BudgetAdmin(admin.ModelAdmin):
+    list_display = ('name', 'user', 'budget_amount', 'spent_amount', 'remaining_amount', 'status')
+    list_filter = ('status', 'category_key', 'user')
+    search_fields = ('name', 'user__email')
+
+@admin.register(Goal)
+class GoalAdmin(admin.ModelAdmin):
+    list_display = ('name', 'user', 'current_amount', 'target_amount', 'deadline', 'priority')
+    list_filter = ('priority', 'category', 'user')
+    search_fields = ('name', 'user__email')
+
+@admin.register(Subscription)
+class SubscriptionAdmin(admin.ModelAdmin):
+    list_display = ('name', 'user', 'amount', 'status', 'value_score')
+    list_filter = ('status', 'usage_level', 'user')
+    search_fields = ('name', 'user__email')