Add Premium feature with UI, model changes, and admin configuration

users/migrations/0003_profile_is_premium.py

@@ -0,0 +1,18 @@
+# Generated by Django 6.0 on 2025-12-10 21:27
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0002_alter_profile_avatar'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='profile',
+            name='is_premium',
+            field=models.BooleanField(default=False),
+        ),
+    ]