chore: remove immutable from custom fields

lib/membership/custom_field.ex

@@ -12,7 +12,6 @@ defmodule Mv.Membership.CustomField do
   - `slug` - URL-friendly, immutable identifier automatically generated from name (e.g., "phone-mobile")
   - `value_type` - Data type constraint (`:string`, `:integer`, `:boolean`, `:date`, `:email`)
   - `description` - Optional human-readable description
-  - `immutable` - If true, custom field values cannot be changed after creation
   - `required` - If true, all members must have this custom field (future feature)
   - `show_in_overview` - If true, this custom field will be displayed in the member overview table and can be sorted
 
@@ -60,10 +59,10 @@ defmodule Mv.Membership.CustomField do
 
   actions do
     defaults [:read, :update]
-    default_accept [:name, :value_type, :description, :immutable, :required, :show_in_overview]
+    default_accept [:name, :value_type, :description, :required, :show_in_overview]
 
     create :create do
-      accept [:name, :value_type, :description, :immutable, :required, :show_in_overview]
+      accept [:name, :value_type, :description, :required, :show_in_overview]
       change Mv.Membership.CustomField.Changes.GenerateSlug
       validate string_length(:slug, min: 1)
     end
@@ -113,10 +112,6 @@ defmodule Mv.Membership.CustomField do
         trim?: true
       ]
 
-    attribute :immutable, :boolean,
-      default: false,
-      allow_nil?: false
-
     attribute :required, :boolean,
       default: false,
       allow_nil?: false

lib/mv_web/live/custom_field_live/form_component.ex

@@ -6,7 +6,7 @@ defmodule MvWeb.CustomFieldLive.FormComponent do
   - Create new custom field definitions
   - Edit existing custom fields
   - Select value type from supported types
-  - Set immutable and required flags
+  - Set required flag
   - Real-time validation
 
   ## Props
@@ -50,10 +50,10 @@ defmodule MvWeb.CustomFieldLive.FormComponent do
             label={gettext("Value type")}
             options={
               Ash.Resource.Info.attribute(Mv.Membership.CustomField, :value_type).constraints[:one_of]
+              |> Enum.map(fn type -> {MvWeb.Translations.FieldTypes.label(type), type} end)
             }
           />
           <.input field={@form[:description]} type="text" label={gettext("Description")} />
-          <.input field={@form[:immutable]} type="checkbox" label={gettext("Immutable")} />
           <.input field={@form[:required]} type="checkbox" label={gettext("Required")} />
           <.input
             field={@form[:show_in_overview]}