Scan barcodes/qrcodes only inside the highlighted area

[bgoncal]

Summary

Screenshots

Link to pull request in Documentation repository

Documentation: home-assistant/companion.home-assistant#

Any other notes

[Copilot]

Pull Request Overview

This PR restricts barcode/QR code scanning to a fixed, highlighted square and updates the messaging UI.

• Add screenSize propagation and normalize rectOfInterest in BarcodeScannerCamera
• Refactor BarcodeScannerCameraView and BarcodeScannerView to render a fixed scanning square overlay
• Replace alert presentation in WebViewExternalMessageHandler with a SwiftMessages banner

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
Sources/App/WebView/WebViewExternalMessageHandler.swift	Annotate handler with @MainActor and extract alert to presentBarcodeScannerMessage using SwiftMessages
Sources/App/BarcodeScanner/Camera/BarcodeScannerView.swift	Define static square size, use @StateObject for model, and update layout to overlay scanning region
Sources/App/BarcodeScanner/Camera/BarcodeScannerCameraView.swift	Add screenSize parameter and forward it to model.camera for rect of interest setup
Sources/App/BarcodeScanner/Camera/BarcodeScannerCamera.swift	Implement screenSize property to compute and apply normalized rectOfInterest on capture session

Comments suppressed due to low confidence (2)

Sources/App/BarcodeScanner/Camera/BarcodeScannerCamera.swift:30

• The new screenSize-based rectOfInterest logic isn't covered by existing tests. Consider adding unit tests to verify the normalized rectOfInterest is calculated correctly for various screen sizes.

    public var screenSize: CGSize? {

Sources/App/BarcodeScanner/Camera/BarcodeScannerView.swift:60

• [nitpick] The accessibilityHint is attached to the HStack instead of the CloseButton. Consider moving accessibility modifiers (hint and label) directly to the button so that screen readers announce it correctly.

                .accessibilityHint(.init(L10n.closeLabel))

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.62%. Comparing base (4f60d68) to head (b6fe786).
Report is 70 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3697      +/-   ##
==========================================
+ Coverage   44.72%   45.62%   +0.90%     
==========================================
  Files         232      233       +1     
  Lines       13911    14101     +190     
==========================================
+ Hits         6221     6434     +213     
+ Misses       7690     7667      -23     

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