Call global-hl-line-unhighlight to remove existing overlay

Setting global-hl-line-mode to nil prevents future highlights, but
doesn't remove any existing overlay. Call global-hl-line-unhighlight
to ensure the overlay is removed when the buffer is configured.

Author: manzaltu

claude-code-ide.el

@@ -398,7 +398,8 @@ cursor management, and process buffering for superior user experience."
   ;; disable hl-line-mode, eliminates another source of flicker
   (setq-local global-hl-line-mode nil)
   (when (featurep 'hl-line)
-    (hl-line-mode -1))
+    (hl-line-mode -1)
+    (global-hl-line-unhighlight))
   ;; make sure the non-breaking space in the prompt isn't themed
   (face-remap-add-relative 'nobreak-space :underline nil :foreground nil)
   ;; Register hook for copy-mode cursor visibility