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- Remove Users namespace from DevicesController (now just DevicesController) - Create ApplicationPushDevice model extending ActionPushNative::Device - Move device registration logic (find_or_initialize + update) to model - Update User::Devices concern to use ApplicationPushDevice - Fix push notification tests (endpoint validation, job count expectations) - Update push_config_test to use ActionPushNative.config Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>