- 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/xtext-color.h

@@ -0,0 +1,20 @@
+/* ZoiteChat
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef HEXCHAT_XTEXT_COLOR_H
+#define HEXCHAT_XTEXT_COLOR_H
+
+typedef struct
+{
+	double red;
+	double green;
+	double blue;
+	double alpha;
+} XTextColor;
+
+#endif