invalidate layout display after block range updates to persist HR rendering

src/EditorView.swift

@@ -1142,6 +1142,9 @@ func updateBlockRanges(for textView: NSTextView) {
     }
 
     lm.blockRanges = blocks
+
+    let fullRange = NSRange(location: 0, length: text.length)
+    lm.invalidateDisplay(forCharacterRange: fullRange)
 }
 
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