Fix text label sizing with --width and --geometry

[mg-dev25]

Fix text label sizing with --width and --geometry

Fixes window sizing issues when using --width, --geometry, or --wrap options with long text content.

Fixes #107, #140, #32, #297, #300

Problem

When a dialog has long text and --width is specified, GTK requests the natural (unwrapped) width first, then tries to wrap the text. This causes windows to expand far beyond the requested width.

Solution

Added a size-allocate callback that constrains the label width to the allocated space. Also set max_width_chars with ELLIPSIZE_NONE to force text wrapping instead of window expansion.

Changes in src/main.c:

• New text_size_allocate_cb() callback
• Set PANGO_WRAP_WORD_CHAR mode for better word breaking
• Calculate and set max_width_chars based on window width
• Connect size-allocate signal when width is constrained

Testing

# Before: Window expands to fit unwrapped text
# After: Window stays at specified width, text wraps

yad --text="This is a very long text that should wrap properly when the window width is constrained by the --width option" --width=400

yad --geometry=400x200 --text="Long text that should wrap within the geometry constraints"