Colores de nodos desde CSV

script.js

@@ -899,13 +899,14 @@ function exportToCSV() {
             return;
         }
 
-        let csvContent = "Source,Target,Value\r\n";
+        let csvContent = "Source,Target,Value,Color\r\n";
         sankeyData.links.forEach(link => {
             const src = (sankeyData.nodes[link.source] && sankeyData.nodes[link.source].name) || "";
             const tgt = (sankeyData.nodes[link.target] && sankeyData.nodes[link.target].name) || "";
             const val = link.value || 0;
+            const color = (sankeyData.nodes[link.source] && sankeyData.nodes[link.source].color) || "";
             // Escape quotes
-            csvContent += `"${src.replace(/"/g,'""')}","${tgt.replace(/"/g,'""')}",${val}\r\n`;
+            csvContent += `"${src.replace(/"/g,'""')}","${tgt.replace(/"/g,'""')}",${val},"${color}"\r\n`;
         });
 
         const blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8;' });
@@ -949,6 +950,7 @@ function importFromCSV(file) {
         const sourceIdx = header.indexOf('Source');
         const targetIdx = header.indexOf('Target');
         const valueIdx = header.indexOf('Value');
+        const colorIdx = header.indexOf('Color');
         
         if (sourceIdx === -1 || targetIdx === -1 || valueIdx === -1) {
             alert("CSV must have columns: Source, Target, Value");
@@ -970,6 +972,7 @@ function importFromCSV(file) {
             const sourceName = values[sourceIdx];
             const targetName = values[targetIdx];
             const value = parseFloat(values[valueIdx]);
+            const color = colorIdx !== -1 ? values[colorIdx] : "";
             
             if (isNaN(value)) continue;
             
@@ -991,7 +994,7 @@ function importFromCSV(file) {
                 nodeMap[sourceName] = nodeIndex++;
                 sankeyData.nodes.push({ 
                     name: sourceName,
-                    color: "#4f46e5",
+                    color: color && /^#[0-9A-Fa-f]{6}$/.test(color.trim()) ? color.trim() : "#4f46e5",
                     value: 0 // Will be updated later
                 });
             }