- Added a shared XTextColor definition and a palette conversion helper for Cairo-ready colors, decoupling renderer palettes from GdkColor usage in the API surface.

- Updated xtext palette APIs to accept internal color arrays directly for rendering setup.
- Wired xtext palette creation through UI entry points to use the new palette helper when constructing or refreshing text views.

src/fe-gtk/palette.h

@@ -20,6 +20,10 @@
 #ifndef HEXCHAT_PALETTE_H
 #define HEXCHAT_PALETTE_H
 
+#include <stddef.h>
+
+#include "xtext-color.h"
+
 extern GdkColor colors[];
 
 #define COL_MARK_FG 32
@@ -59,4 +63,6 @@ void palette_dark_set_color (int idx, const GdkColor *col);
  */
 gboolean palette_apply_dark_mode (gboolean enable);
 
+void palette_get_xtext_colors (XTextColor *palette, size_t palette_len);
+
 #endif