Validate and normalize auto-postpone period to days (#2672)

* Validate and normalize auto-postpone period to days

- Add Entropy::AUTO_POSTPONE_PERIODS and validate auto_postpone_period against the allowed set
- Introduce auto_postpone_period_in_days for forms and entropy update endpoints
- Fall back to index 0 in knob partial when current value isn't in options
- Remove entropy_auto_close_options helper in favor of model constant
- Update tests to use allowed period values

* Use auto_postpone_period_in_days for JSON entropy updates

The JSON API was accepting auto_postpone_period (seconds) which
bypassed the days normalization and validation. Switch to
auto_postpone_period_in_days consistently and add explicit
wrap_parameters so flat JSON params are wrapped correctly for
the virtual attribute.

* Default to account or 30-day fallback when knob value is invalid

* Address PR review feedback for entropy validation

- Fall back to first knob option (index 0) when persisted value isn't in
  the allowed set, preventing nil index errors for legacy values
- Use integer division (1.day.to_i) for consistent day calculations

* Default to account entropy period instead of first option for knob fallback

* Test that default auto-postpone period is in the allowed periods

* Return 422 instead of 500 for invalid entropy auto-postpone values

Rescue ActiveRecord::RecordInvalid in entropy controllers so invalid
auto_postpone_period_in_days values return 422 Unprocessable Entity
instead of raising a 500.

* Fix NoMethodError when board entropy falls back to account default

Use container.account.entropy.auto_postpone_period_in_days instead of
container.account.auto_postpone_period_in_days since Account doesn't
delegate that method.

* Test board entropy fallback to account default for invalid periods

app/controllers/account/entropies_controller.rb

@@ -1,4 +1,6 @@
 class Account::EntropiesController < ApplicationController
+  wrap_parameters :entropy, include: [ :auto_postpone_period_in_days ]
+
   before_action :ensure_admin
 
   def update
@@ -8,10 +10,12 @@ class Account::EntropiesController < ApplicationController
       format.html { redirect_to account_settings_path, notice: "Account updated" }
       format.json { head :no_content }
     end
+  rescue ActiveRecord::RecordInvalid
+    head :unprocessable_entity
   end
 
   private
     def entropy_params
-      params.expect(entropy: [ :auto_postpone_period ])
+      params.expect(entropy: [ :auto_postpone_period_in_days ])
     end
 end

app/controllers/boards/entropies_controller.rb

@@ -1,5 +1,5 @@
 class Boards::EntropiesController < ApplicationController
-  wrap_parameters :board
+  wrap_parameters :board, include: [ :auto_postpone_period_in_days ]
 
   include BoardScoped
 
@@ -12,10 +12,12 @@ class Boards::EntropiesController < ApplicationController
       format.turbo_stream
       format.json { head :no_content }
     end
+  rescue ActiveRecord::RecordInvalid
+    head :unprocessable_entity
   end
 
   private
     def entropy_params
-      params.expect(board: [ :auto_postpone_period ])
+      params.expect(board: [ :auto_postpone_period_in_days ])
     end
 end

app/controllers/boards_controller.rb

@@ -88,7 +88,7 @@ class BoardsController < ApplicationController
     end
 
     def board_params
-      params.expect(board: [ :name, :all_access, :auto_postpone_period, :public_description ])
+      params.expect(board: [ :name, :all_access, :auto_postpone_period_in_days, :public_description ])
     end
 
     def grantees

app/helpers/entropy_helper.rb

@@ -1,8 +1,4 @@
 module EntropyHelper
-  def entropy_auto_close_options
-    [ 3, 7, 30, 90, 365, 11 ]
-  end
-
   def entropy_bubble_options_for(card)
     {
       daysBeforeReminder: card.entropy.days_before_reminder,

app/models/board/auto_postponing.rb

@@ -6,9 +6,7 @@ module Board::AutoPostponing
   end
 
   private
-    DEFAULT_AUTO_POSTPONE_PERIOD = 30.days
-
     def set_default_auto_postpone_period
-      self.auto_postpone_period ||= DEFAULT_AUTO_POSTPONE_PERIOD unless attribute_present?(:auto_postpone_period)
+      self.auto_postpone_period ||= Entropy::DEFAULT_AUTO_POSTPONE_PERIOD_IN_DAYS.days unless attribute_present?(:auto_postpone_period)
     end
 end

app/models/board/entropic.rb

@@ -2,7 +2,7 @@ module Board::Entropic
   extend ActiveSupport::Concern
 
   included do
-    delegate :auto_postpone_period, to: :entropy
+    delegate :auto_postpone_period, :auto_postpone_period_in_days, to: :entropy
     has_one :entropy, as: :container, dependent: :destroy
   end
 
@@ -12,6 +12,10 @@ module Board::Entropic
 
   def auto_postpone_period=(new_value)
     entropy ||= association(:entropy).reader || self.build_entropy
-    entropy.update auto_postpone_period: new_value
+    entropy.update! auto_postpone_period: new_value
+  end
+
+  def auto_postpone_period_in_days=(value)
+    self.auto_postpone_period = value.to_i.days.to_i
   end
 end

app/models/entropy.rb

@@ -1,6 +1,35 @@
 class Entropy < ApplicationRecord
+  DEFAULT_AUTO_POSTPONE_PERIOD_IN_DAYS = 30
+  AUTO_POSTPONE_PERIODS_IN_DAYS = [ 3, 7, 30, 90, 365, 11 ].freeze
+  AUTO_POSTPONE_PERIODS_IN_SECONDS = AUTO_POSTPONE_PERIODS_IN_DAYS.map { |n| n.day.in_seconds }.freeze
+
   belongs_to :account, default: -> { container.account }
   belongs_to :container, polymorphic: true
 
+  validates :auto_postpone_period, inclusion: { in: AUTO_POSTPONE_PERIODS_IN_SECONDS }
+
   after_commit -> { container.cards.touch_all if container }
+
+  def auto_postpone_period_in_days
+    days = auto_postpone_period / 1.day.to_i
+
+    if days.in?(AUTO_POSTPONE_PERIODS_IN_DAYS)
+      days
+    else
+      default_auto_postpone_period_in_days
+    end
+  end
+
+  def auto_postpone_period_in_days=(new_value)
+    self.auto_postpone_period = new_value.to_i.days.to_i
+  end
+
+  private
+    def default_auto_postpone_period_in_days
+      if container.is_a?(Board)
+        container.account.entropy.auto_postpone_period_in_days
+      else
+        DEFAULT_AUTO_POSTPONE_PERIOD_IN_DAYS
+      end
+    end
 end

app/views/entropy/_auto_close.html.erb

@@ -6,8 +6,9 @@
     <%= form_with model: model, url: url, data: { controller: "form" } do |form| %>
       <%= render "entropy/knob",
             form: form,
-            name: :auto_postpone_period,
-            knob_options: entropy_auto_close_options,
+            name: :auto_postpone_period_in_days,
+            current_value: model.auto_postpone_period_in_days,
+            knob_options: Entropy::AUTO_POSTPONE_PERIODS_IN_DAYS,
             label: "Days until auto-close",
             disabled: disabled  %>
     <% end %>

app/views/entropy/_knob.html.erb

@@ -1,6 +1,5 @@
 <%
-  period = form.object.send(name)
-  current_index = knob_options.index(period.to_i / 1.day)
+  current_index = knob_options.index(current_value) || knob_options.index(Entropy::DEFAULT_AUTO_POSTPONE_PERIOD_IN_DAYS)
 %>
 
 <fieldset class="knob" data-controller="knob" data-knob-target="field" style="--knob-options: <%= knob_options.length %>; --knob-index: <%= current_index %>">
@@ -8,7 +7,7 @@
     <% knob_options.each_with_index do |value, index| %>
       <label class="knob__option" style="--i: <%= index %>">
         <%= form.radio_button name,
-              value.days,
+              value,
               data: {
                 action: "change->knob#optionChanged change->form#submit",
                 index: index,