feat: remove Feature.enable_by_default in favor of scope field

The scope field (GLOBAL/PER_CHAIN) now fully covers the use case that
enable_by_default served, making the flag redundant.

Author: tmjssz

src/chains/admin.py

@@ -8,15 +8,6 @@
 from .models import Chain, Feature, GasPrice, Service, Wallet
 
 
-class FeatureInlineFormSet(BaseInlineFormSet[Model, Model, ModelForm[Model]]):
-    def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super().__init__(*args, **kwargs)
-        if self.instance.pk is None:
-            default_features = list(Feature.objects.filter(enable_by_default=True))
-            self.initial = [{"feature": feature.id} for feature in default_features]
-            self.extra = len(default_features)
-
-
 class WalletInlineFormSet(BaseInlineFormSet[Model, Model, ModelForm[Model]]):
     def __init__(self, *args: Any, **kwargs: Any) -> None:
         super().__init__(*args, **kwargs)
@@ -51,7 +42,6 @@ class GasPriceInline(admin.TabularInline[Model, Model]):
 
 class FeatureInline(admin.TabularInline[Model, Model]):
     model = Feature.chains.through
-    formset = FeatureInlineFormSet
     extra = 0
     verbose_name_plural = "Features enabled for this chain"
 
@@ -115,15 +105,15 @@ class ServiceAdmin(admin.ModelAdmin[Service]):
 @admin.register(Feature)
 class FeatureAdmin(admin.ModelAdmin[Feature]):
     form = FeatureAdminForm
-    list_display = ("key", "scope", "description", "enable_by_default")
-    list_editable = ("enable_by_default", "scope")
+    list_display = ("key", "scope", "description")
+    list_editable = ("scope",)
     list_filter = ("scope", "services")
     fieldsets = (
         (None, {"fields": ("key", "description")}),
         (
             "Scope Configuration",
             {
-                "fields": ("scope", "chains", "enable_by_default", "services"),
+                "fields": ("scope", "chains", "services"),
                 "description": "Configure which chains and services have access to this feature.",
             },
         ),

src/chains/migrations/0053_remove_feature_enable_by_default.py

@@ -0,0 +1,17 @@
+# Generated by Django 6.0.2 on 2026-02-19 14:37
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('chains', '0052_feature_scope_services'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='feature',
+            name='enable_by_default',
+        ),
+    ]

src/chains/migrations/tests/test_migration_0053.py

@@ -0,0 +1,27 @@
+from django.db.migrations.state import StateApps
+
+from chains.migrations.tests.utils import TestMigrations
+
+
+class Migration0053TestCase(TestMigrations):
+    migrate_from = "0052_feature_scope_services"
+    migrate_to = "0053_remove_feature_enable_by_default"
+
+    def setUpBeforeMigration(self, apps: StateApps) -> None:
+        Feature = apps.get_model("chains", "Feature")
+        Feature.objects.create(
+            key="test-feature",
+            description="Test feature",
+            enable_by_default=True,
+            scope="PER_CHAIN",
+        )
+
+    def test_feature_preserved(self) -> None:
+        Feature = self.apps_registry.get_model("chains", "Feature")
+        feature = Feature.objects.get(key="test-feature")
+        self.assertEqual(feature.description, "Test feature")
+
+    def test_enable_by_default_removed(self) -> None:
+        Feature = self.apps_registry.get_model("chains", "Feature")
+        field_names = [f.name for f in Feature._meta.get_fields()]
+        self.assertNotIn("enable_by_default", field_names)

src/chains/models.py

@@ -290,10 +290,6 @@ class Scope(models.TextChoices):
         help_text="The unique name/key that identifies this feature",
     )
     description = models.CharField(max_length=255, default="")
-    enable_by_default = models.BooleanField(
-        default=False,
-        help_text="If checked, this feature will be automatically enabled when creating a chain.",
-    )
     scope = models.CharField(
         max_length=10,
         choices=Scope.choices,