refactor: resolve merge conflicts — combine main improvements with token normalization

- .gitignore: keep both graphify-out/ entries and main's .gitnexus entry
- ScriptCodeBlock/ScriptPreviewModal: take main's border-border and text-accent-text
  for filename labels; use neutral ghost style for Save button in ScriptCodeBlock;
  use bg-accent (normalized from bg-primary) for Save button in ScriptPreviewModal

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/components/assistant/ChatSidebar.tsx

@@ -189,7 +189,7 @@ function ChatItem({
 
   return (
     <div
-      onClick={onSelect}
+      onClick={confirming ? e => e.stopPropagation() : onSelect}
       className={cn(
         'group flex items-center gap-2 px-3 py-2.5 mx-1.5 rounded-lg cursor-pointer transition-colors',
         confirming