Use "Output" for Shelly RPC switch sub-device names

[bdraco]

Proposed change

Use "Output" instead of "Switch" for Shelly RPC sub-device names to match Shelly's own device UI naming convention.

Previously, multi-channel switch devices like the Power Strip Gen4 would create sub-devices named "Switch 0", "Switch 1", etc. However, the Shelly device UI labels these as "Output (0)", "Output (1)", etc. This change aligns Home Assistant's naming with Shelly's terminology for better consistency.

Before

After

Shelly device UI

Type of change

• Bugfix (non-breaking change which fixes an issue)

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to 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.

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[home-assistant]

Hey there @bieniu, @thecode, @chemelli74, mind taking a look at this pull request as it has been labeled with an integration (shelly) you are listed as a code owner for? Thanks!

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[Copilot]

Pull request overview

This PR updates the naming convention for Shelly RPC switch sub-devices from "Switch" to "Output" to align with Shelly's official device UI terminology. This improves consistency for users who interact with both Home Assistant and the Shelly app.

Key Changes

• Modified get_rpc_sub_device_name() function to return "Output" instead of "Switch" for switch components
• Added comprehensive test coverage for the get_rpc_sub_device_name() function including edge cases

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
homeassistant/components/shelly/utils.py	Added special case handling for "switch" component to use "Output" naming instead of the default titlecase naming
tests/components/shelly/test_utils.py	Added new test function with parametrized test cases covering all component types including switches, covers, lights, and energy meters, plus tests for custom names and emeter phases

[bdraco]

thanks