Fix residual detail row aggregation

lib/server/financial-taxonomy.ts

@@ -295,6 +295,54 @@ function rowHasValues(values: Record<string, number | null>) {
   return Object.values(values).some((value) => value !== null);
 }
 
+function detailConceptIdentity(row: DetailFinancialRow) {
+  const localName = row.localName.trim().toLowerCase();
+  if (localName.length > 0) {
+    if (row.isExtension) {
+      return `extension:${localName}`;
+    }
+
+    if (row.namespaceUri.includes('us-gaap')) {
+      return `us-gaap:${localName}`;
+    }
+
+    if (row.namespaceUri.includes('ifrs')) {
+      return `ifrs:${localName}`;
+    }
+
+    const prefix = row.qname.split(':')[0]?.trim().toLowerCase();
+    if (prefix) {
+      return `${prefix}:${localName}`;
+    }
+  }
+
+  const normalizedQName = row.qname.trim().toLowerCase();
+  if (normalizedQName.length > 0) {
+    return normalizedQName;
+  }
+
+  const normalizedConceptKey = row.conceptKey.trim().toLowerCase();
+  if (normalizedConceptKey.length > 0) {
+    return normalizedConceptKey;
+  }
+
+  return row.key.trim().toLowerCase();
+}
+
+function detailMergeKey(row: DetailFinancialRow) {
+  const dimensionsKey = [...row.dimensionsSummary]
+    .map((value) => value.trim().toLowerCase())
+    .filter((value) => value.length > 0)
+    .sort((left, right) => left.localeCompare(right))
+    .join('|') || 'no-dimensions';
+
+  return [
+    detailConceptIdentity(row),
+    row.unit ?? 'no-unit',
+    dimensionsKey
+  ].join('::');
+}
+
 const PINNED_INCOME_SURFACE_ROWS = new Set([
   'revenue',
   'gross_profit',
@@ -413,9 +461,10 @@ function aggregateDetailRows(input: {
           continue;
         }
 
-        const existing = bucket.get(row.key);
+        const mergeKey = detailMergeKey(row);
+        const existing = bucket.get(mergeKey);
         if (!existing) {
-          bucket.set(row.key, {
+          bucket.set(mergeKey, {
             ...row,
             values: filteredValues,
             sourceFactIds: [...row.sourceFactIds],
@@ -1186,6 +1235,7 @@ export const __financialTaxonomyInternals = {
   buildDimensionBreakdown,
   buildNormalizationMetadata,
   aggregateSurfaceRows,
+  aggregateDetailRows,
   mergeStructuredKpiRowsByPriority,
   periodSorter,
   selectPrimaryPeriodsByCadence,