fix: harden WarpText cleanup and Shuffle glyph masks

[DavidHDev]

Summary

• retain WarpText cleanup error handling across all four variants
• size Shuffle vertical masks from measured font metrics without changing line-box layout
• regenerate the corresponding registry artifacts

Validation

• npm exec tsc -- --noEmit --pretty false
• targeted JavaScript ESLint
• Prettier check for all changed source variants
• npm run build
• visual verification with descender-heavy text and a non-default font

Closes #1047
Closes #1051