Wire ItemTagNotifier to AASM complete event

On idled → completed transition, ItemTag#after_commit fires
ItemTagNotifier to all shopkeepers in the shop's account except
the completer (completed_by). idle! does not fire.

Closes the AASM-trigger half of issue #58 PR #2 scope. APNs/FCM
provider credentials still need provisioning (bin/rails
credentials:edit) before delivery is enabled in production.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: dadachi

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## [Unreleased]
 
+- Wire `ItemTagNotifier` to the `ItemTag` AASM `complete` event via `after_commit`. On state transition `idled → completed`, the notifier fires to all shopkeepers in the shop's account except the completer (`completed_by`). Only the AASM trigger — APNs/FCM provider credentials still pending (`bin/rails credentials:edit` once the keys are provisioned).
 - Drop the standalone `Device` model and consolidate push-token registration onto `ApplicationPushDevice` (subclass of `ActionPushNative::Device`) so `deliver_by :action_push_native` actually fires for tokens registered via `POST /api/v1/shopkeeper/devices`. The custom `devices` table is dropped; `action_push_native_devices` is rebuilt with UUID primary key + UUID polymorphic owner + `bundle_id` / `last_active_at` columns + unique `(platform, token)` index.
 - API contract change (still pre-mobile-client): `device.platform` enum is now `[apple, google]` (matches Action Push Native's APNs/FCM service convention) instead of `[ios, android]`. Mobile substrate clients (PRs #3-5) will register with `apple` or `google`.
 - Renames: `Device` → `ApplicationPushDevice`, `Api::Shopkeeper::DevicePolicy` → `Api::Shopkeeper::ApplicationPushDevicePolicy`, `DeviceSerializer` → `ApplicationPushDeviceSerializer` (JSONAPI `type` stays `device`); `Shopkeeper has_many :devices` → `has_many :application_push_devices, as: :owner`.

app/models/item_tag.rb

@@ -24,11 +24,20 @@ class ItemTag < ApplicationRecord
 
     event :complete do
       transitions from: [:idled], to: :completed
+      after_commit :notify_completed
     end
   end
 
   private
 
+  def notify_completed
+    recipients = shop.account.shopkeepers
+    recipients = recipients.where.not(id: completed_by_id) if completed_by_id.present?
+    return if recipients.empty?
+
+    ItemTagNotifier.with(record: self).deliver(recipients)
+  end
+
   def set_default_position
     return if position.present?
 

test/models/item_tag_test.rb

@@ -119,4 +119,61 @@ def setup
       assert item_tag.idled?
     end
   end
+
+  test "complete! fires ItemTagNotifier to all account shopkeepers except completer" do
+    ActsAsTenant.with_tenant(@account) do
+      other = shopkeepers(:two)
+      AccountsShopkeeper.create!(account: @account, shopkeeper: other, roles: {member: true})
+
+      item_tag = @shop.item_tags.first
+      item_tag.completed_by = @shopkeeper
+
+      assert_difference -> { Noticed::Event.count }, 1 do
+        assert_difference -> { Noticed::Notification.count }, 1 do
+          item_tag.complete!
+        end
+      end
+
+      notification = Noticed::Notification.last
+      assert_equal other, notification.recipient
+      assert_equal item_tag, notification.record
+    end
+  end
+
+  test "complete! fires notifier to all shopkeepers when completed_by is unset" do
+    ActsAsTenant.with_tenant(@account) do
+      other = shopkeepers(:two)
+      AccountsShopkeeper.create!(account: @account, shopkeeper: other, roles: {member: true})
+
+      item_tag = @shop.item_tags.first
+
+      assert_difference -> { Noticed::Notification.count }, 2 do
+        item_tag.complete!
+      end
+    end
+  end
+
+  test "complete! is a no-op for the notifier when account has only the completer" do
+    ActsAsTenant.with_tenant(@account) do
+      item_tag = @shop.item_tags.first
+      item_tag.completed_by = @shopkeeper
+
+      assert_no_difference -> { Noticed::Event.count } do
+        assert_no_difference -> { Noticed::Notification.count } do
+          item_tag.complete!
+        end
+      end
+    end
+  end
+
+  test "idle! does not fire ItemTagNotifier" do
+    ActsAsTenant.with_tenant(@account) do
+      item_tag = @shop.item_tags.first
+      item_tag.complete!
+
+      assert_no_difference -> { Noticed::Event.count } do
+        item_tag.idle!
+      end
+    end
+  end
 end