Fix ForegroundStyle recursive loop

[Kyle-Ye]

No description provided.

[augmentcode]

🤖 Augment PR Summary

Summary: Prevents Color.foregroundStyle from entering a recursive resolution loop when the effective foreground style resolves back to .foreground.

Changes:

• Adds a recursion-guard flag (`.foreground`) before applying `effectiveForegroundStyle` in ForegroundStyle._apply
• Makes _ShapeStyle_Shape.effectiveForegroundStyle prefer an explicitly provided foregroundStyle over the environment-derived effective style

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[augmentcode]

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 28.13%. Comparing base (a8fe1e8) to head (782ee14).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...SwiftUICore/Shape/ShapeStyle/ForegroundStyle.swift	0.00%	1 Missing ⚠️
...SwiftUICore/Shape/ShapeStyle/ShapeStyleShape.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #730       +/-   ##
===========================================
+ Coverage   14.08%   28.13%   +14.04%     
===========================================
  Files         577      603       +26     
  Lines       34110    36941     +2831     
===========================================
+ Hits         4806    10393     +5587     
+ Misses      29304    26548     -2756     

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