release-2.1.0.3

Texture Format & Versioning

• Added automatic minimal-version inference via compute_minimal_version().
• Internal version representation standardized (VER 1.0 → 10 using maj*10 + min scheme).
• Save operation now always writes an explicit VER x.y header.
• Texture format auto-promotes to:
  • VER 2.0 when 8-bit colors are used.
  • VER 2.1 when materials contain -1.
• Ensured full round-trip consistency between load() and save().
• Fixed format bug in save() where long Color string format was used rather than the compact format.

Texture System

• Added support for -1 materials in load/save.
• Fixed subset() to correctly copy characters, colors, and materials.

UI

• Added Dialog::set_textel_str_pre() for more flexible textel pre-styling.

Examples

• Reordered example execution in examples.cpp and removed header prints.