[Kyle-Ye]

Summary

• Expose UIKit/AppKit APIs through the public OpenSwiftUI Clang module and core framework APIs through OpenSwiftUICore. Reuse the existing C targets and keep one package manifest.
• Install an umbrella header, OpenSwiftUI_Metal.h, and a public module map in each framework. Exclude generated Swift headers from the public layout.
• Add conditional CoreTransferable and DeveloperToolsSupport re-exports and update OpenObservation to support module selectors when Observation is also imported.
• Select observation macros explicitly in unit and compatibility tests to avoid conflicts between Observation and OpenObservation.

Validation

• Local unit tests pass on macOS and iOS Simulator after the rebase.
• The Bindable compatibility test passes with both OpenSwiftUI and SwiftUI on macOS.
• Header-installation and binary-interface script tests pass. Before the rebase, the same Clang module and Metal header implementation passed layout, Swift/Objective-C import, Metal compilation, and OpenSwiftUI-spm Example interface checks on iOS Simulator, macOS, and visionOS Simulator.

Dependency

• OpenObservation#7 (merged).

[tuist]

🛠️ Tuist Run Report 🛠️

Tests 🧪

Scheme	Status	Ran test modules	Commit
OpenSwiftUI	✅	7	e3943af5b

Builds 🔨

Scheme	Status	Duration	Commit
OpenSwiftUI	✅	1m 9s	e3943af5b

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 31.37%. Comparing base (c79b90a) to head (a3bf6e4).

Files with missing lines	Patch %	Lines
...nt/Platform/AppKit/AppKitKeyEventConversions.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1232      +/-   ##
==========================================
+ Coverage   27.75%   31.37%   +3.62%     
==========================================
  Files         908      982      +74     
  Lines       67675    80761   +13086     
==========================================
+ Hits        18782    25340    +6558     
- Misses      48893    55421    +6528     

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