Connect to APNs sandbox server in development (#74)

config/push.yml left connect_to_development_server commented out, so the
gem connected to the production APNs host in every environment. A Xcode
debug build registers a sandbox device token; pushing it to production
APNs returns 400 BadDeviceToken, which the gem raises as TokenError and
then destroys the device via the default rescue_from. The visible symptom
was an iOS device record vanishing as soon as any notification fired
(e.g. an Android client completing an item_tag).

Enable the gem's recommended default so local development talks to the
APNs sandbox while staging/production use the production host.

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

Author: dadachi

config/push.yml

@@ -26,7 +26,13 @@ shared:
     # Please note that anything built directly from Xcode and loaded on your phone will have
     # the app generate DEVELOPMENT tokens, while everything else (TestFlight, Apple Store, ...)
     # will be considered as PRODUCTION environment.
-    # connect_to_development_server: <%= Rails.env.development? %>
+    #
+    # Without this, the gem defaults to the production APNs server. A Xcode
+    # debug build registers a sandbox token, and pushing it to the production
+    # server returns 400 BadDeviceToken, which the gem treats as TokenError and
+    # destroys the device. Match the server to the Rails environment so local
+    # development talks to the sandbox.
+    connect_to_development_server: <%= Rails.env.development? %>
 
   # Use bin/rails credentials:edit to set the fcm secrets under
   # action_push_native:fcm:{project_id, encryption_key}.

test/config/push_config_test.rb

@@ -0,0 +1,10 @@
+require "test_helper"
+
+class PushConfigTest < ActiveSupport::TestCase
+  test "apns connects to the sandbox server only in the development environment" do
+    config = ActionPushNative.config
+
+    assert config.key?(:apple), "expected push.yml to configure the :apple platform"
+    assert_equal Rails.env.development?, config.dig(:apple, :connect_to_development_server)
+  end
+end