8b60ee1a0e
This commit adds support for 4-digit and 8-digit hexadecimal color codes with alpha channel (e.g., #FF00FF80 for 50% transparent magenta). Changes: - Extended Color dataclass with optional alpha field (default 255) - Updated _validate_color_hex to accept lengths 3, 4, 6, 8 - Updated from_hex to parse 4-digit (#RGBA) and 8-digit (#RRGGBBAA) hex codes - Modified as_hex to return #RRGGBBAA when alpha != 255 - Added as_rgba() and as_bgra() methods - Added from_rgba_tuple() and from_bgra_tuple() class methods - Updated __eq__ and __hash__ to include alpha channel - Added comprehensive unit tests for all RGBA functionality - Updated docstrings with examples of new alpha channel support --------- Co-authored-by: jirka <6035284+Borda@users.noreply.github.com> Co-authored-by: Claude Code <noreply@anthropic.com> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>