fix(ExportHtml): preserve nested ol start across sibling ul

src/node/utils/ExportHtml.ts

@@ -470,7 +470,10 @@ const getHTMLFromAtext = async (pad:PadType, atext: AText, authorColors?: string
           // preserve counters so numbering can continue after interruptions.
           // Use 0 as sentinel (not delete) so the ol-opening logic knows this
           // level was explicitly reset and won't fall back to line.start.
-          if (diff + 1 > actualNextLevel) {
+          // Only reset when closing an ordered list — closing an unordered list
+          // at the same level must not poison the ol counter for a future
+          // unrelated ol at this level (which would still want line.start).
+          if (line.listTypeName === 'number' && diff + 1 > actualNextLevel) {
             olItemCounts[diff + 1] = 0;
           }