Add reboot button to velux gateway device

[wollew]

Breaking change

Proposed change

This PR adds a reboot button to the KLF 200 gateway device. This allows us to deprecate and eventually remove the velux.reboot_gateway service, making it more convenient for users to reboot their gateway (this was suggested in #155207 (comment) and sounds like a good idea).

The PR depends on #155434 which introduces the gateway as its own device, it it followed up by #155549 (adds the service deprecation issue).

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue: Velux integration: add the KLF 200 gateway as device #155434
• Link to documentation pull request: TODO
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• I understand the code I am submitting and can explain how it works.
• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.
• Any generated code has been carefully reviewed for correctness and compliance with project standards.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[home-assistant]

Hey there @Julius2342, @DeerMaximum, @pawlizio, mind taking a look at this pull request as it has been labeled with an integration (velux) you are listed as a code owner for? Thanks!

Code owner commands

Code owners of velux can trigger bot actions by commenting:

• @home-assistant close Closes the pull request.
• @home-assistant rename Awesome new title Renames the pull request.
• @home-assistant reopen Reopen the pull request.
• @home-assistant unassign velux Removes the current integration label and assignees on the pull request, add the integration domain after the command.
• @home-assistant add-label needs-more-information Add a label (needs-more-information, problem in dependency, problem in custom component) to the pull request.
• @home-assistant remove-label needs-more-information Remove a label (needs-more-information, problem in dependency, problem in custom component) on the pull request.

[wollew]

draft until #155434 is merged

[Copilot]

Pull Request Overview

This PR adds a button entity to the Velux integration for rebooting the KLF 200 gateway and refactors the integration's data model to properly support device hierarchy. The main changes include introducing a VeluxData dataclass to store both the PyVLX instance and gateway device identifier, creating the gateway as a device in the device registry, and establishing proper device relationships (via_device) between child devices and the gateway.

Key changes:

• Added button platform with gateway reboot functionality
• Introduced VeluxData dataclass to wrap runtime data, replacing direct PyVLX storage
• Created gateway device in device registry with proper metadata and version information
• Updated all platform files to use new runtime data structure and pass full config_entry instead of just entry_id

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
homeassistant/components/velux/__init__.py	Introduces VeluxData dataclass, creates gateway device in registry, updates runtime_data structure
homeassistant/components/velux/button.py	Adds new button entity for gateway reboot with proper error handling
homeassistant/components/velux/const.py	Adds Platform.BUTTON to PLATFORMS list
homeassistant/components/velux/entity.py	Updates VeluxEntity to accept full config_entry and set via_device for device hierarchy
homeassistant/components/velux/binary_sensor.py	Updates to use new runtime_data structure and config_entry parameter
homeassistant/components/velux/cover.py	Updates to use new runtime_data structure and config_entry parameter
homeassistant/components/velux/light.py	Updates to use new runtime_data structure and config_entry parameter
homeassistant/components/velux/scene.py	Updates to use new runtime_data structure
homeassistant/components/velux/strings.json	Adds button entity translation and reboot_failed exception message, removes period from service description
tests/components/velux/conftest.py	Adds setup_integration fixture for cleaner test setup
tests/components/velux/test_button.py	Adds comprehensive tests for button entity setup and behavior
tests/components/velux/test_binary_sensor.py	Adds test verification for via_device relationship to gateway

Comments suppressed due to low confidence (1)

homeassistant/components/velux/init.py:66

• The async_reboot_gateway service handler is missing a docstring. According to the coding guidelines, all methods and functions require docstrings explaining their purpose.

    async def async_reboot_gateway(service_call: ServiceCall) -> None:
        await pyvlx.reboot_gateway()

[Copilot]

device_info should use the DeviceInfo class from homeassistant.helpers.device_registry instead of a plain dictionary for better type safety and consistency with the rest of the codebase.