Fix jittery thinking

Author: jahooma

cli/src/components/blocks/thinking-block.tsx

@@ -31,7 +31,7 @@ export const ThinkingBlock = memo(
     const firstBlock = blocks[0]
     const isCollapsed = firstBlock?.isCollapsed ?? true
     const marginLeft = Math.max(0, indentLevel * 2)
-    const availWidth = Math.max(10, availableWidth - marginLeft - 4)
+    const availWidth = Math.max(10, availableWidth - marginLeft - 10)
 
     const handleToggle = useCallback(() => {
       onToggleCollapsed(thinkingId)