style(umbriel): update cursor theme and size

dot_config/umbriel/config.toml

@@ -59,8 +59,10 @@ map_to_output = "eDP-1"
 # take the pointer along, so scratchpads — shown on the pointer's output —
 # open where focus is.
 [input.cursor]
-theme = "capitaine-cursors-light"
-size = 24
+# Bibata Ghost: dark translucent Bibata (AUR bibata-cursor-translucent). Umbriel
+# exports it as XCURSOR_THEME and announces it to X11 apps over XSETTINGS.
+theme = "Bibata_Ghost"
+size = 28
 hide_when_typing = true
 follows_focus = true