优化平台参数处理逻辑，支持逗号分隔值的独立分组

Co-authored-by: Copilot <copilot@github.com>

modeler/src/views/decision/designer/properties.vue

@@ -108,7 +108,8 @@
                                       :placeholder="setting.description" size="small" style="width:100%;" />
                       <a-select :placeholder="`请选择${setting.description}`"
                                 allow-clear
-                                v-else-if="setting.paramKey === 'platforms'" v-model:value="setting.defaultValue">
+                                v-else-if="setting.paramKey === 'platforms'"
+                                v-model:value="setting.defaultValue">
                         <a-select-option v-for="pl in getAvailablePlatforms()" :value="pl.name">{{pl.description}}</a-select-option>
                       </a-select>
                       <a-select :placeholder="`请选择${setting.description}`"
@@ -315,17 +316,46 @@ export default defineComponent({
       });
 
       // 第二步：将 Map 转换为二维数组（按 groupIndex 升序排序）
-      groupedParameters.value = Array.from(groupMap.entries())
-        // 按分组索引从小到大排序（保证分组顺序正确）
+      const rawGroups = Array.from(groupMap.entries())
         .sort((a, b) => a[0] - b[0])
-        // 只保留分组后的参数数组，丢弃 key
         .map(item => item[1]);
 
+      // 第三步：展开逗号分隔的 platforms 值 —— 每个平台拆成独立分组
+      const expandedGroups: Array<ElementParameter[]> = [];
+      for (const group of rawGroups) {
+        const platformParam = group.find(p => p.paramKey === 'platforms');
+        if (platformParam) {
+          const platformValues = String(platformParam.defaultValue ?? '')
+            .split(',')
+            .map(v => v.trim())
+            .filter(Boolean);
+          if (platformValues.length > 1) {
+            // 每个平台值生成独立分组，其余参数保持一致
+            for (const pv of platformValues) {
+              const newGroup = JSON.parse(JSON.stringify(group)) as ElementParameter[];
+              const pp = newGroup.find(p => p.paramKey === 'platforms');
+              if (pp) pp.defaultValue = pv;
+              expandedGroups.push(newGroup);
+            }
+            continue;
+          }
+        }
+        expandedGroups.push(group);
+      }
+
+      groupedParameters.value = expandedGroups;
       multiableParameters.value = multiable === true && groupedParameters.value.length > 0;
     };
 
-    // 获取平台Tab显示名称（优先使用下属平台名称）
+    // 获取平台Tab显示名称（优先取该分组的 platforms 参数值，其次下属平台名称）
     const getPlatformTabName = (index: number): string => {
+      const group = groupedParameters.value[index];
+      if (group) {
+        const platformParam = group.find(p => p.paramKey === 'platforms');
+        if (platformParam?.defaultValue) {
+          return String(platformParam.defaultValue);
+        }
+      }
       const sub = subPlatforms.value[index];
       if (sub) {
         return sub.name || sub.description || `平台 ${index + 1}`;