Rename push to process on PushTarget for clearer semantics

"Push to target" reads naturally - we push the notification to the
target. "Target processes" also makes sense - the target receives
and handles the notification in its own way.

- Add class method PushTarget.process(notification) that instantiates
  and calls the instance method
- Rename instance method from push to process
- Add private push_to helper in Pushable for readable iteration

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

test/models/notification/push_target/web_test.rb

@@ -27,28 +27,28 @@ class Notification::PushTarget::WebTest < ActiveSupport::TestCase
         subscriptions.count == 1
     end
 
-    Notification::PushTarget::Web.new(@notification).push
+    Notification::PushTarget::Web.new(@notification).process
   end
 
   test "does not push when user has no subscriptions" do
     @user.push_subscriptions.delete_all
     @web_push_pool.expects(:queue).never
 
-    Notification::PushTarget::Web.new(@notification).push
+    Notification::PushTarget::Web.new(@notification).process
   end
 
   test "does not push for cancelled accounts" do
     @user.account.cancel(initiated_by: @user)
     @web_push_pool.expects(:queue).never
 
-    Notification::PushTarget::Web.new(@notification).push
+    Notification::PushTarget::Web.new(@notification).process
   end
 
   test "does not push when creator is system user" do
     @notification.update!(creator: users(:system))
     @web_push_pool.expects(:queue).never
 
-    Notification::PushTarget::Web.new(@notification).push
+    Notification::PushTarget::Web.new(@notification).process
   end
 
   test "payload includes card title for card events" do
@@ -56,7 +56,7 @@ class Notification::PushTarget::WebTest < ActiveSupport::TestCase
       payload[:title] == @notification.card.title
     end
 
-    Notification::PushTarget::Web.new(@notification).push
+    Notification::PushTarget::Web.new(@notification).process
   end
 
   test "payload for comment includes RE prefix" do
@@ -67,7 +67,7 @@ class Notification::PushTarget::WebTest < ActiveSupport::TestCase
       payload[:title].start_with?("RE:")
     end
 
-    Notification::PushTarget::Web.new(notification).push
+    Notification::PushTarget::Web.new(notification).process
   end
 
   test "payload for assignment includes assigned message" do
@@ -78,7 +78,7 @@ class Notification::PushTarget::WebTest < ActiveSupport::TestCase
       payload[:body].include?("Assigned to you")
     end
 
-    Notification::PushTarget::Web.new(notification).push
+    Notification::PushTarget::Web.new(notification).process
   end
 
   test "payload for mention includes mentioner name" do
@@ -89,7 +89,7 @@ class Notification::PushTarget::WebTest < ActiveSupport::TestCase
       payload[:title].include?("mentioned you")
     end
 
-    Notification::PushTarget::Web.new(notification).push
+    Notification::PushTarget::Web.new(notification).process
   end
 
 end

test/models/notification/pushable_test.rb

@@ -15,12 +15,9 @@ class Notification::PushableTest < ActiveSupport::TestCase
     end
   end
 
-  test "push calls push on all registered targets" do
+  test "push calls process on all registered targets" do
     target_class = mock("push_target_class")
-    target_instance = mock("push_target_instance")
-
-    target_class.expects(:new).with(@notification).returns(target_instance)
-    target_instance.expects(:push)
+    target_class.expects(:process).with(@notification)
 
     original_targets = Notification.push_targets
     Notification.push_targets = [ target_class ]