Fix UIKit trait collection change handling

[Kyle-Ye]

Summary

• Refresh the UIKit event bridge when the hosting view's user interface idiom changes.
• Invalidate the hosting environment after trait collection changes.
• Wire UIKitEventBindingBridge through AnyUIHostingView/EventBindingBridge so the bridge can update CarPlay touch handling.

[augmentcode]

🤖 Augment PR Summary

Summary: This PR improves UIKit trait-collection change handling for hosted SwiftUI content.

Changes:

• Introduces a `UIKitEventBindingBridge` subclass of `EventBindingBridge` and threads it through `_UIHostingView`/`AnyUIHostingView`.
• Creates and stores an `eventBridge` on `_UIHostingView` during initialization.
• On `traitCollectionDidChange`, refreshes event-bridge behavior when the user-interface idiom changes (e.g. enabling CarPlay-specific touch handling).
• Invalidates hosting environment properties after trait changes to ensure environment values are recomputed.

Technical Notes: Adds a CarPlay path that constrains a gesture recognizer’s `allowedTouchTypes` to direct touches when applicable.

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[augmentcode]

Review completed. 1 suggestion posted.

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[augmentcode]

Sources/OpenSwiftUI/Integration/Hosting/UIKit/View/UIHostingView+Extension.swift:415 — Calling _openSwiftUIUnimplementedWarning() inside debugName can spam logs and can even fatalError under OPENSWIFTUI_DEVELOPMENT when UIHostingViewDebugLayer.name is queried repeatedly by CoreAnimation. Consider returning nil without warning until UIHostingViewDebugOptions is implemented.

Severity: medium

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 25.98%. Comparing base (bfad60c) to head (10cf869).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #916       +/-   ##
===========================================
+ Coverage   13.81%   25.98%   +12.16%     
===========================================
  Files         676      719       +43     
  Lines       44380    50668     +6288     
===========================================
+ Hits         6132    13165     +7033     
+ Misses      38248    37503      -745     

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