diff --git a/miniapp/pages/index/index.js b/miniapp/pages/index/index.js
index 15f82b5..3a7ecc3 100644
--- a/miniapp/pages/index/index.js
+++ b/miniapp/pages/index/index.js
@@ -232,6 +232,41 @@ function buildColumnSelectedMap(indices) {
   return map;
 }
 
+/**
+ * 为三组列选择 UI 构造可直接渲染的数据，避免模板层做复杂表达式计算。
+ */
+function buildColumnRenderRows(headers, sourceDataColumn, sourceDescMap, targetDescMap) {
+  const normalizedHeaders = Array.isArray(headers) ? headers : [];
+  const sourceRows = [];
+  const sourceDescRows = [];
+  const targetDescRows = [];
+
+  normalizedHeaders.forEach((header, index) => {
+    const label = String(header || '');
+    sourceRows.push({
+      index,
+      label,
+      selected: sourceDataColumn === index
+    });
+    sourceDescRows.push({
+      index,
+      label,
+      checked: !!(sourceDescMap && sourceDescMap[index])
+    });
+    targetDescRows.push({
+      index,
+      label,
+      checked: !!(targetDescMap && targetDescMap[index])
+    });
+  });
+
+  return {
+    sourceDataRows: sourceRows,
+    sourceDescRows,
+    targetDescRows
+  };
+}
+
 /**
  * 统一错误文案：
  * - xlsx 解析能力缺失时，固定提示用户去“构建 npm”
@@ -543,6 +578,9 @@ Page({
     targetDescriptionColumns: [],
     sourceDescSelectedMap: {},
     targetDescSelectedMap: {},
+    sourceDataRows: [],
+    sourceDescRows: [],
+    targetDescRows: [],
     sectionVisibleSourceData: true,
     sectionVisibleSourceDesc: true,
     sectionVisibleTargetDesc: true,
@@ -965,7 +1003,13 @@ Page({
         sourceDescriptionColumns,
         targetDescriptionColumns,
         sourceDescSelectedMap: buildColumnSelectedMap(sourceDescriptionColumns),
-        targetDescSelectedMap: buildColumnSelectedMap(targetDescriptionColumns)
+        targetDescSelectedMap: buildColumnSelectedMap(targetDescriptionColumns),
+        ...buildColumnRenderRows(
+          headers.length > 0 ? headers : [],
+          sourceDataColumn,
+          buildColumnSelectedMap(sourceDescriptionColumns),
+          buildColumnSelectedMap(targetDescriptionColumns)
+        )
       },
       () => {
         this.rebuildSankey();
@@ -975,9 +1019,16 @@ Page({
 
   onSelectSourceData(e) {
     const index = Number(e.currentTarget.dataset.index);
+    const safeSourceDataColumn = Number.isNaN(index) ? null : index;
     this.setData(
       {
-        sourceDataColumn: Number.isNaN(index) ? null : index
+        sourceDataColumn: safeSourceDataColumn,
+        ...buildColumnRenderRows(
+          this.data.columnHeaders || [],
+          safeSourceDataColumn,
+          this.data.sourceDescSelectedMap || {},
+          this.data.targetDescSelectedMap || {}
+        )
       },
       () => {
         this.rebuildSankey();
@@ -995,10 +1046,17 @@ Page({
     const next = exists
       ? current.filter((item) => item !== index)
       : normalizeColumnIndexArray(current.concat(index));
+    const nextSourceDescSelectedMap = buildColumnSelectedMap(next);
     this.setData(
       {
         sourceDescriptionColumns: next,
-        sourceDescSelectedMap: buildColumnSelectedMap(next)
+        sourceDescSelectedMap: nextSourceDescSelectedMap,
+        ...buildColumnRenderRows(
+          this.data.columnHeaders || [],
+          this.data.sourceDataColumn,
+          nextSourceDescSelectedMap,
+          this.data.targetDescSelectedMap || {}
+        )
       },
       () => {
         this.rebuildSankey();
@@ -1016,10 +1074,17 @@ Page({
     const next = exists
       ? current.filter((item) => item !== index)
       : normalizeColumnIndexArray(current.concat(index));
+    const nextTargetDescSelectedMap = buildColumnSelectedMap(next);
     this.setData(
       {
         targetDescriptionColumns: next,
-        targetDescSelectedMap: buildColumnSelectedMap(next)
+        targetDescSelectedMap: nextTargetDescSelectedMap,
+        ...buildColumnRenderRows(
+          this.data.columnHeaders || [],
+          this.data.sourceDataColumn,
+          this.data.sourceDescSelectedMap || {},
+          nextTargetDescSelectedMap
+        )
       },
       () => {
         this.rebuildSankey();
diff --git a/miniapp/pages/index/index.wxml b/miniapp/pages/index/index.wxml
index 1927844..fbeaaeb 100644
--- a/miniapp/pages/index/index.wxml
+++ b/miniapp/pages/index/index.wxml
@@ -106,12 +106,12 @@
           </view>
           <view class="column-list" wx:if="{{sectionVisibleSourceData}}">
             <view class="column-list-line" />
-            <view class="row" wx:for="{{columnHeaders}}" wx:key="index" data-index="{{index}}" bindtap="onSelectSourceData">
+            <view class="row" wx:for="{{sourceDataRows}}" wx:key="index" data-index="{{item.index}}" bindtap="onSelectSourceData">
               <view class="row-link" />
               <image src="../../assets/icons/data.svg" mode="aspectFit" />
-              <text class="label">{{item}}</text>
+              <text class="label">{{item.label}}</text>
               <image
-                src="{{sourceDataColumn === index ? '../../assets/icons/radiobutton.svg' : '../../assets/icons/radiobutton-no.svg'}}"
+                src="{{item.selected ? '../../assets/icons/radiobutton.svg' : '../../assets/icons/radiobutton-no.svg'}}"
                 mode="aspectFit"
               />
             </view>
@@ -128,12 +128,12 @@
           </view>
           <view class="column-list" wx:if="{{sectionVisibleSourceDesc}}">
             <view class="column-list-line" />
-            <view class="row" wx:for="{{columnHeaders}}" wx:key="index" data-index="{{index}}" bindtap="onToggleSourceDesc">
+            <view class="row" wx:for="{{sourceDescRows}}" wx:key="index" data-index="{{item.index}}" bindtap="onToggleSourceDesc">
               <view class="row-link" />
               <image src="../../assets/icons/description.svg" mode="aspectFit" />
-              <text class="label">{{item}}</text>
+              <text class="label">{{item.label}}</text>
               <image
-                src="{{sourceDescSelectedMap[index] ? '../../assets/icons/checkbox.svg' : '../../assets/icons/checkbox-no.svg'}}"
+                src="{{item.checked ? '../../assets/icons/checkbox.svg' : '../../assets/icons/checkbox-no.svg'}}"
                 mode="aspectFit"
               />
             </view>
@@ -150,12 +150,12 @@
           </view>
           <view class="column-list" wx:if="{{sectionVisibleTargetDesc}}">
             <view class="column-list-line" />
-            <view class="row" wx:for="{{columnHeaders}}" wx:key="index" data-index="{{index}}" bindtap="onToggleTargetDesc">
+            <view class="row" wx:for="{{targetDescRows}}" wx:key="index" data-index="{{item.index}}" bindtap="onToggleTargetDesc">
               <view class="row-link" />
               <image src="../../assets/icons/description.svg" mode="aspectFit" />
-              <text class="label">{{item}}</text>
+              <text class="label">{{item.label}}</text>
               <image
-                src="{{targetDescSelectedMap[index] ? '../../assets/icons/checkbox.svg' : '../../assets/icons/checkbox-no.svg'}}"
+                src="{{item.checked ? '../../assets/icons/checkbox.svg' : '../../assets/icons/checkbox-no.svg'}}"
                 mode="aspectFit"
               />
             </view>