Do not justify last line.

[JimBobSquarePants]

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• I have written a descriptive pull-request title
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• I have provided test coverage for my change (where applicable)

Description

Refactors how text justification is handled in the TextLayout process. The change defers justification until after all lines are split, ensuring that only the appropriate lines are justified and metrics are recalculated correctly.

[codecov]

Codecov Report

❌ Patch coverage is 77.77778% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 82%. Comparing base (6df7590) to head (cbdfdee).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/SixLabors.Fonts/TextLayout.cs	77%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #525   +/-   ##
=====================================
- Coverage     82%     82%   -1%     
=====================================
  Files        305     305           
  Lines      21618   21628   +10     
  Branches    3196    3200    +4     
=====================================
+ Hits       17875   17881    +6     
- Misses      2932    2934    +2     
- Partials     811     813    +2     

Flag	Coverage Δ
unittests	82% <77%> (-1%)	⬇️

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[Copilot]

Pull request overview

Refactors text layout justification so it’s applied after line splitting, aiming to avoid justifying the final line and to ensure line metrics are recalculated at the right time.

Changes:

• Moves justification out of TextLine.Finalize(...) and into a post-pass after BreakLines() has produced all lines.
• Updates TextLine.Justify(...) to recalculate line metrics after modifying glyph advances.
• Updates reference image outputs for text-justification tests (LFS pointers updated).

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/SixLabors.Fonts/TextLayout.cs	Defers justification until after line breaking; adjusts finalize/justify responsibilities and metrics recalculation.
tests/Images/ReferenceOutput/TextJustification_InterWord_Vertical_400-direction_RightToLeft-TextJustification_InterWord.png	Updates expected rendered output (Git LFS pointer change).
tests/Images/ReferenceOutput/TextJustification_InterWord_Vertical_400-direction_LeftToRight-TextJustification_InterWord.png	Updates expected rendered output (Git LFS pointer change).
tests/Images/ReferenceOutput/TextJustification_InterWord_Horizontal_400-direction_RightToLeft-TextJustification_InterWord.png	Updates expected rendered output (Git LFS pointer change).
tests/Images/ReferenceOutput/TextJustification_InterWord_Horizontal_400-direction_LeftToRight-TextJustification_InterWord.png	Updates expected rendered output (Git LFS pointer change).
tests/Images/ReferenceOutput/TextJustification_InterCharacter_Vertical_400-direction_RightToLeft-TextJustification_InterCharacter.png	Updates expected rendered output (Git LFS pointer change).
tests/Images/ReferenceOutput/TextJustification_InterCharacter_Vertical_400-direction_LeftToRight-TextJustification_InterCharacter.png	Updates expected rendered output (Git LFS pointer change).
tests/Images/ReferenceOutput/TextJustification_InterCharacter_Horizontal_400-direction_RightToLeft-TextJustification_InterCharacter.png	Updates expected rendered output (Git LFS pointer change).
tests/Images/ReferenceOutput/TextJustification_InterCharacter_Horizontal_400-direction_LeftToRight-TextJustification_InterCharacter.png	Updates expected rendered output (Git LFS pointer change).

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