fix(est): apply head cost classification safely

tools/est-test/native-rows.js

@@ -82,10 +82,11 @@ const EstRows = (() => {
       );
     return amounts(row, digits);
   }
-  function head(rows, options = {}, resolve = () => null) {
+  function head(rows, options = {}, resolve = () => null, refreshRows = []) {
     const output = structuredClone(rows),
       titles = [],
-      errors = [];
+      errors = [],
+      refreshErrors = [];
     let current = null,
       body = [];
     function finish() {
@@ -93,7 +94,7 @@ const EstRows = (() => {
       Object.assign(current, add(body));
       titles.push({ ...current });
     }
-    for (const row of output) {
+    for (const [index, row] of output.entries()) {
       if (num(row.Index) > 0) {
         finish();
         current = row;
@@ -119,12 +120,15 @@ const EstRows = (() => {
         body = [row];
         continue;
       } else {
-        if (options.SourceRefresh && ![1, 3].includes(num(row.CalcIndex))) {
+        const requested = refreshRows.includes(index);
+        if ((options.SourceRefresh || requested) && ![1, 3].includes(num(row.CalcIndex))) {
           try {
             const price = resolve(row);
+            if (requested && !price) throw Error("원천 단가를 찾을 수 없습니다.");
             if (price) units.forEach((key, i) => (row[key] = num(price[components[i]])));
           } catch (error) {
             errors.push(`${current.Name}: ${error.message}`);
+            if (requested) refreshErrors.push(error.message);
           }
         }
         amounts(row, options.HeadDigits || 0, options.TotalFit);
@@ -132,7 +136,9 @@ const EstRows = (() => {
       body.push(row);
     }
     finish();
-    return { rows: output, titles, errors };
+    return refreshRows.length
+      ? { rows: output, titles, errors, refreshErrors }
+      : { rows: output, titles, errors };
   }
   function estimate(rows, options = {}, resolve = () => null, refreshRows = []) {
     const output = structuredClone(rows),