- Converted text background loading to build Cairo surfaces directly from pixbufs for renderer use.

- Updated the xtext renderer to accept Cairo background surfaces and dropped the GtkStyle attach during realize to keep rendering Cairo/Pango-focused.
- Switched background surface ownership and cleanup to use cairo_surface_t across the shared state and settings update path.

src/fe-gtk/fe-gtk.c

@@ -58,7 +58,7 @@
 #include <canberra.h>
 #endif
 
-GdkPixmap *channelwin_pix;
+cairo_surface_t *channelwin_pix;
 
 #ifdef USE_LIBCANBERRA
 static ca_context *ca_con;