claude fix: struct field freezes the UI

prompt: The page freezes up when a struct type column is chosen from the dropdown of 2D plot choices. Can you determine why?

index.html

@@ -156,17 +156,29 @@
 				return div.innerHTML;
 			}
 
+			// Determine if a DuckDB type is a complex type (struct, list, map, etc.)
+			function isComplexType(type) {
+				const complexTypes = ['STRUCT', 'LIST', 'MAP', 'UNION', 'ARRAY'];
+				return complexTypes.some(t => type.toUpperCase().startsWith(t));
+			}
+
 			// Determine if a DuckDB type is numeric
 			function isNumericType(type) {
+				// First check if it's a complex type
+				if (isComplexType(type)) return false;
+
 				const numericTypes = ['TINYINT', 'SMALLINT', 'INTEGER', 'BIGINT', 'HUGEINT',
 									  'FLOAT', 'DOUBLE', 'DECIMAL', 'NUMERIC', 'REAL'];
-				return numericTypes.some(t => type.toUpperCase().includes(t));
+				return numericTypes.some(t => type.toUpperCase().startsWith(t));
 			}
 
 			// Determine if a DuckDB type is text
 			function isTextType(type) {
+				// First check if it's a complex type
+				if (isComplexType(type)) return false;
+
 				const textTypes = ['VARCHAR', 'CHAR', 'TEXT', 'STRING'];
-				return textTypes.some(t => type.toUpperCase().includes(t));
+				return textTypes.some(t => type.toUpperCase().startsWith(t));
 			}
 
 			// Detect columns and their types from the dataset