fix(est): preserve links and formula precision

tools/est-test/native-model.js

@@ -374,6 +374,48 @@ const EstModel = (() => {
     });
     return validate(project);
   }
+  function editCode(project, table, index, value) {
+    const rows = project.tables[table],
+      row = rows[index];
+    const grouped = ["HeadMainDat", "CostMainDat", "MachMainDat"].includes(table);
+    const kind = Number(
+      Object.entries(EstNative.sourceTables).find(([, name]) => name === table)?.[0] ||
+        { HeadMainDat: 103, CostMainDat: 104, MachMainDat: 105 }[table],
+    );
+    if (!kind || (grouped && !(Number(row.Index) > 0))) {
+      row.Code = value;
+      return;
+    }
+    const code = String(value || "").trim(),
+      old = row.Code;
+    if (
+      !code ||
+      rows.some(
+        (other, at) =>
+          at !== index &&
+          (!grouped || Number(other.Index) > 0) &&
+          (other.Code === code || other.PreviousCodes?.includes(code)),
+      )
+    )
+      throw Error("비어 있거나 중복된 원천 코드입니다.");
+    if (old === code) return;
+    row.Code = code;
+    row.PreviousCodes = [...new Set([...(row.PreviousCodes || []), old].filter(Boolean))];
+    for (const list of Object.values(project.tables))
+      for (const linked of list)
+        if (old && Number(linked.LinkIndex) === kind && linked.Code === old) linked.Code = code;
+    if (grouped) {
+      const titles = project.tables[EstNative.sourceTables[kind]] || [];
+      const title = titles.find((item) => item.Code === old);
+      if (title) Object.assign(title, { Code: code, PreviousCodes: [...row.PreviousCodes] });
+      for (
+        let at = index;
+        at < rows.length && (at === index || !(Number(rows[at].Index) > 0));
+        at++
+      )
+        if (rows[at].TitleCode === old) rows[at].TitleCode = code;
+    }
+  }
   function newRow(table, rows) {
     const max = Math.max(0, ...rows.map((r) => Number(r.PkID) || 0));
     const row = {
@@ -397,5 +439,5 @@ const EstModel = (() => {
     if (table === "CostMainDat") Object.assign(row, { LineData: "Q = 1 + 1 = \x122\x12" });
     return row;
   }
-  return { labels, numeric, columns, validate, legacy, newRow };
+  return { labels, numeric, columns, validate, legacy, newRow, editCode };
 })();