Optimize OPENSWIFTUI_LINK_COREUI check

[Kyle-Ye]

No description provided.

[augmentcode]

🤖 Augment PR Summary

Summary: Optimizes OPENSWIFTUI_LINK_COREUI gating in NamedImage to reduce conditional-compilation scope.
Changes:

• Moves CoreUI `#if` blocks from wrapping entire helpers to inside the helper bodies.
• Adds explicit non-CoreUI fallbacks via `_openSwiftUIPlatformUnimplementedFailure()` / `_openSwiftUIPlatformUnimplementedWarning()`.
• Makes `VectorInfo` and relevant cache subscripts compile uniformly, returning `nil` where appropriate.

Notes: CoreUI-backed behavior remains the same when the flag is enabled; unsupported paths are now explicit at runtime.

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[augmentcode]

Review completed. 2 suggestions posted.

Comment augment review to trigger a new review at any time.

[augmentcode]

With #if OPENSWIFTUI_LINK_COREUI moved inside the body, this file still references CoreUI types (e.g., CUICatalog, CUINamedVectorGlyph) in signatures/fields (loadVectorInfo, VectorInfo, cache subscripts), so non-CoreUI builds may still need those symbols available. Can you confirm this won’t break configurations where CoreUI isn’t importable/linkable?

Severity: medium

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[augmentcode]

_openSwiftUIPlatformUnimplementedFailure() is the only statement in the #else branch of a non-Void function; this relies on it being -> Never for compilation/correctness when OPENSWIFTUI_LINK_COREUI is off (also applies to similar branches like symbolSizeScale).

Severity: medium

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 27.39%. Comparing base (6945325) to head (f0825c9).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...ources/OpenSwiftUICore/View/Image/NamedImage.swift	0.00%	13 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #812       +/-   ##
===========================================
+ Coverage   13.99%   27.39%   +13.40%     
===========================================
  Files         624      659       +35     
  Lines       37809    42366     +4557     
===========================================
+ Hits         5291    11606     +6315     
+ Misses      32518    30760     -1758     

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