Fix camera proxy with sole image quality settings

[frenck]

Proposed change

Fixed an issue reported in #84576 (from 2022) with the proxy integration.

Given this example:

- platform: proxy
  name: security_camera_proxy
  entity_id: camera.security_camera
  stream_quality: 1
  image_quality: 1

This is a valid case, but goes south. While max width is optional, it actually isn't. This pull request fixes this case by honoring the quality settings.

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 Cannot specify stream_quality or image_quality for proxy camera integration #84576
• This PR is related to issue:
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• 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.

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

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[Copilot]

Pull Request Overview

This PR addresses an issue in the proxy integration for cameras by ensuring that quality settings are honored even when no max_width is provided.

• Adds a conditional block to apply JPEG quality changes when max_width is None.
• Modifies image processing to create a JPEG of the desired quality if specified.