Refactor table rendering: replace plain text with InlineSpan for rich text support, update row preparation, and improve PDF formatting logic.

markdown_parser.go

@@ -220,11 +220,11 @@ func RenderAST(doc ast.Node, content []byte, r *IHKRenderer) error {
 			if !entering {
 				return ast.WalkContinue, nil
 			}
-			var tableData [][]string
+			var tableData [][][]InlineSpan
 			for row := node.FirstChild(); row != nil; row = row.NextSibling() {
-				var rowData []string
+				var rowData [][]InlineSpan
 				for cell := row.FirstChild(); cell != nil; cell = cell.NextSibling() {
-					rowData = append(rowData, extractPlainText(cell, content))
+					rowData = append(rowData, extractInlineSpans(cell, content))
 				}
 				tableData = append(tableData, rowData)
 			}