diff --git a/src/main/java/com/xly/service/FormRenderService.java b/src/main/java/com/xly/service/FormRenderService.java
index 19436bc..f63135b 100644
--- a/src/main/java/com/xly/service/FormRenderService.java
+++ b/src/main/java/com/xly/service/FormRenderService.java
@@ -256,6 +256,28 @@ public class FormRenderService {
     }
 
     /**
+     * 联动回填：用户在选择器里选中一行后，ERP 按其控件配置的 {@code sAssignField} 声明了该行还应带出哪些列
+     * （客户→客户编号/客户名称等），前端把值一并回传。**只填用户没填过的列**——用户在表单里写了备注，
+     * 就不该被客户档案里的备注覆盖；同时只认目标表真实存在的非系统列。
+     */
+    private void applyAssign(Map<String, Object> col, Map<String, String> types, Map<String, String> assign) {
+        if (assign == null || assign.isEmpty()) {
+            return;
+        }
+        for (Map.Entry<String, String> e : assign.entrySet()) {
+            String target = e.getKey();
+            String v = e.getValue();
+            if (v == null || v.isBlank() || col.containsKey(target)) {
+                continue;
+            }
+            if (!types.containsKey(target) || resolver.isSystemColumn(target)) {
+                continue;
+            }
+            col.put(target, v);
+        }
+    }
+
+    /**
      * 把用户/模型给的字符串按目标列规范化：外键列名称→id（租户内，多条命中报错列候选、
      * 唯一精确同名优先——绝不静默绑最短匹配），其余按列类型强转。目标列必须物理存在
      * （字段字典由表单控件名构建，含大量幻影列；幻影列会让类型校验静默失效）。
@@ -377,12 +399,15 @@ public class FormRenderService {
      * **只构建不写入**：产物由调用方经 {@link OpService} 落 ai_op_queue。
      */
     public CreateBuild buildCreate(AgentIdentity identity, String entityKeyword, Map<String, String> fields) {
-        return buildCreate(identity, entityKeyword, fields, null);
+        return buildCreate(identity, entityKeyword, fields, null, null);
     }
 
-    /** 同上；{@code boundIds}（技术列名→id）来自选择器里点中的行，FK 列据此直接绑定，不按名称反查。 */
+    /**
+     * 同上；{@code boundIds}（技术列名→id）来自选择器里点中的行，FK 列据此直接绑定，不按名称反查；
+     * {@code assign}（技术列名→值）是 ERP 声明的联动回填，只补用户没填过的列。
+     */
     public CreateBuild buildCreate(AgentIdentity identity, String entityKeyword, Map<String, String> fields,
-                                   Map<String, String> boundIds) {
+                                   Map<String, String> boundIds, Map<String, String> assign) {
         CreateBuild out = new CreateBuild();
         if (isBlank(entityKeyword)) {
             out.error = "缺少单据类型。";
@@ -401,7 +426,7 @@ public class FormRenderService {
             return out;
         }
         if ("quoquotationmaster".equalsIgnoreCase(out.table)) {
-            return buildQuote(identity, entityKeyword, fields, boundIds, out);
+            return buildQuote(identity, entityKeyword, fields, boundIds, assign, out);
         }
 
         Map<String, String> types = resolver.columnTypes(out.table);
@@ -441,6 +466,7 @@ public class FormRenderService {
             out.error = "请至少提供一个有效字段（如客户名称）。";
             return out;
         }
+        applyAssign(col, types, assign);
         for (String rc : requiredCols(out.table)) {
             if (col.containsKey(rc) || resolver.isSystemColumn(rc)) {
                 continue;
@@ -469,8 +495,8 @@ public class FormRenderService {
      * 字段按策展的 target 表分流；印刷/颜色/单双面无独立列 → 合进从表 sMaterialsMemo；多数量按逗号拆多行。
      * 价格由 ERP【核价】计算，只落主-从明细。
      */
-    private CreateBuild buildQuote(AgentIdentity identity, String entityKeyword,
-                                   Map<String, String> fields, Map<String, String> boundIds, CreateBuild out) {
+    private CreateBuild buildQuote(AgentIdentity identity, String entityKeyword, Map<String, String> fields,
+                                   Map<String, String> boundIds, Map<String, String> assign, CreateBuild out) {
         Map<String, String> masterTypes = resolver.columnTypes(out.table);
         Map<String, String> slaveTypes = resolver.columnTypes("quoquotationslave");
         Map<String, Map<String, Object>> labelMap = new LinkedHashMap<>();
@@ -560,6 +586,7 @@ public class FormRenderService {
             return out;
         }
 
+        applyAssign(masterCol, masterTypes, assign);
         for (String rc : requiredCols(out.table)) {
             if (masterCol.containsKey(rc) || resolver.isSystemColumn(rc)) {
                 continue;
diff --git a/src/main/java/com/xly/service/PreviewService.java b/src/main/java/com/xly/service/PreviewService.java
index 1814ad0..32abbb3 100644
--- a/src/main/java/com/xly/service/PreviewService.java
+++ b/src/main/java/com/xly/service/PreviewService.java
@@ -490,14 +490,18 @@ public class PreviewService {
 
     /** collectForm 表单【保存】→ 构建校验 create 载荷 → 入队。返回 {queued,opIds,...} 或 {error}。 */
     public Map<String, Object> saveCreate(AgentIdentity who, String convId, String entity, Map<String, String> fields) {
-        return saveCreate(who, convId, entity, fields, null);
+        return saveCreate(who, convId, entity, fields, null, null);
     }
 
-    /** 同上；boundIds = 外键字段在选择器里点中的记录 id（字段技术名→id）。 */
+    /**
+     * 同上；boundIds = 外键字段在选择器里点中的记录 id（字段技术名→id）；
+     * assign = ERP 声明的联动回填（选中客户带出客户编号等），只补用户没填过的列。
+     */
     public Map<String, Object> saveCreate(AgentIdentity who, String convId, String entity,
-                                          Map<String, String> fields, Map<String, String> boundIds) {
+                                          Map<String, String> fields, Map<String, String> boundIds,
+                                          Map<String, String> assign) {
         Map<String, Object> out = new LinkedHashMap<>();
-        FormRenderService.CreateBuild b = render.buildCreate(who, entity, fields, boundIds);
+        FormRenderService.CreateBuild b = render.buildCreate(who, entity, fields, boundIds, assign);
         if (b.error != null) {
             out.put("error", b.error);
             return out;
diff --git a/src/main/java/com/xly/web/AgentChatController.java b/src/main/java/com/xly/web/AgentChatController.java
index ef7c072..a586d6c 100644
--- a/src/main/java/com/xly/web/AgentChatController.java
+++ b/src/main/java/com/xly/web/AgentChatController.java
@@ -116,6 +116,7 @@ public class AgentChatController {
         public String entity;
         public Map<String, String> fields; // 字段中文名 -> 值
         public Map<String, String> boundIds; // 外键字段技术名 -> 选择器里点中的记录 id
+        public Map<String, String> assign;   // ERP 声明的联动回填：目标列技术名 -> 值
         public String conversationId;
         public String authorization;
     }
@@ -153,7 +154,7 @@ public class AgentChatController {
         ledger.append(convId, "form_submit", Map.of("entity", entity, "fields", parts.toString()), identity);
 
         try {
-            Map<String, Object> r = previews.saveCreate(identity, convId, entity, fields, req.boundIds);
+            Map<String, Object> r = previews.saveCreate(identity, convId, entity, fields, req.boundIds, req.assign);
             if (r.containsKey("error")) {
                 ledger.append(convId, "assistant", Map.of("text", String.valueOf(r.get("error"))), identity);
             }
diff --git a/src/main/resources/templates/chat.html b/src/main/resources/templates/chat.html
index 19bb64b..84afe9e 100644
--- a/src/main/resources/templates/chat.html
+++ b/src/main/resources/templates/chat.html
@@ -731,7 +731,17 @@ function addFormCard(ev) {
     const controls = []; // {label, required, get()}
     // 已选中记录的 id（字段名→id）：ERP 的级联下拉要靠它过滤（如产品限定在已选客户名下）
     const bound = {};
+    const assigned = {}; // 选中行带出的联动回填（字段名→{目标列:值}），由 ERP 的 assign 声明
     const ctxOf = () => Object.assign({}, bound);
+    // 用户自己填了的列不参与回填——已写的备注不该被客户档案里的备注覆盖
+    const assignOf = () => {
+        const typed = new Set(controls.filter(c => String(c.get() || "").trim()).map(c => c.name));
+        const out = {};
+        Object.values(assigned).forEach(m => Object.entries(m).forEach(([k, v]) => {
+            if (!typed.has(k)) out[k] = v;
+        }));
+        return out;
+    };
 
     (ev.fields || []).forEach(f => {
         const wrap = el("div", "ffield");
@@ -751,9 +761,10 @@ function addFormCard(ev) {
             pick.onclick = () => openFkPicker(
                 { fkTable: f.fkTable, formId: ev.formId, name: f.name, ctx: ctxOf },
                 f.label || f.name,
-                (name, id) => {
+                (name, id, assign) => {
                     inp.value = name;
                     if (id) bound[f.name] = id; else delete bound[f.name];
+                    assigned[f.name] = assign || {};
                 });
             row.appendChild(inp);
             row.appendChild(pick);
@@ -780,7 +791,7 @@ function addFormCard(ev) {
         }
         if (f.hint) wrap.appendChild(el("div", "hint", f.hint));
         grid.appendChild(wrap);
-        controls.push({ label: f.label || f.name, required: !!f.required, get: getter });
+        controls.push({ name: f.name, label: f.label || f.name, required: !!f.required, get: getter });
     });
     card.appendChild(grid);
 
@@ -821,6 +832,7 @@ function addFormCard(ev) {
                     entity: ev.entity,
                     fields: fields,
                     boundIds: bound,
+                    assign: assignOf(),
                     conversationId: conversationId
                 })
             });
@@ -899,7 +911,15 @@ async function loadFkPage() {
             cols.forEach(c => tr.appendChild(el("td", null, r[c.col] == null ? "" : String(r[c.col]))));
             tr.onclick = () => {
                 $("#modalMask").classList.remove("show");
-                if (fk.onPick && nameCol) fk.onPick(String(r[nameCol] || ""), r[valueCol] == null ? null : String(r[valueCol]));
+                // ERP 声明的联动回填（目标列→结果列）：把选中行对应的值一并带出，和网页选中客户的行为一致
+                const assign = {};
+                Object.entries(d.assign || {}).forEach(([target, src]) => {
+                    const v = r[src];
+                    if (v != null && String(v) !== "") assign[target] = String(v);
+                });
+                if (fk.onPick && nameCol) {
+                    fk.onPick(String(r[nameCol] || ""), r[valueCol] == null ? null : String(r[valueCol]), assign);
+                }
             };
             tbody.appendChild(tr);
         });