TwoPhaseCorR 1.1.1

Resubmission: This update addresses a namespace masking issue that could cause
ginv from MASS to be unavailable in examples under certain environments.
The fix is applied by explicitly importing ginv and reordering package Imports.

New Features

• Added tolerance-based classification for Efficiency Factor (E ≈ 1).
• Function TwoPhaseDesign() now prints Efficiency Factor (E) at the specified rho directly to the console.
• Enhanced eff_plot with improved axis labels, title, and visual clarity using ggplot2.

Enhancements

• Improved output structure and modular layout for better interpretability.
• Streamlined discovery of efficient designs over a range of v and rho.
• Enhanced numerical stability in efficiency computations.

Bug Fixes

• Fixed namespace masking issue for ginv by explicitly importing from MASS.
• Fixed global variable declaration issues for Class, Rho, and Efficiency to meet CRAN compliance (utils::globalVariables() used).
• Removed problematic Unicode characters (e.g., ≥, ≈) from .Rd files that previously caused LaTeX PDF manual generation errors.

Documentation

• Added detailed argument and return value descriptions in function documentation.
• Cleaned and standardized .Rd files for LaTeX compatibility.
• Resolved all CRAN LaTeX PDF warnings by ensuring proper rendering under pdflatex.

CRAN Readiness

• Successfully passes R CMD check with no errors, warnings, or notes.
• Verified compatibility with R 4.5.1 and R-devel across platforms.