feat(clone): allow same-source cloning and disable cross-sourceType targets

- Remove the restriction that prevents cloning to the same data source
- Disable (instead of hide) target options with different sourceType
- Add sourceType label (MT4/MT5) to data source select options
- Preserve groupFilter/param1/param2 when cloning to same source
- Auto-reset target when source changes to incompatible sourceType
- Remove parent-level check requiring at least 2 data sources

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/pages/rules/components/CopyRule/Multi‌CopyPopup.tsx

@@ -232,22 +232,22 @@ const MultiCopyPopup = ({
             onValuesChange={({ sourceDataSourceId }) => {
               if (sourceDataSourceId) {
                 const curFormRef = formMapRef?.current?.[0]?.current;
-                const curTargetDataSourceId =
-                  curFormRef?.getFieldValue('targetDataSourceId');
-                if (curTargetDataSourceId === sourceDataSourceId) {
-                  let targetDataSourceId: string | number | null = null;
-                  for (const item of dataSourceList) {
-                    if (item.id !== sourceDataSourceId) {
-                      targetDataSourceId = item.id;
-                      break;
-                    }
-                  }
-                  if (targetDataSourceId) {
-                    curFormRef?.setFieldsValue({
-                      targetDataSourceId,
-                    });
-                    setTargetDataSourceId(targetDataSourceId);
-                  }
+                const curTargetId = curFormRef?.getFieldValue('targetDataSourceId');
+                const sourceItem = dataSourceList.find(
+                  (item) => item.id === sourceDataSourceId,
+                );
+                const targetItem = dataSourceList.find(
+                  (item) => item.id === curTargetId,
+                );
+                if (targetItem && sourceItem && targetItem.sourceType !== sourceItem.sourceType) {
+                  const fallback =
+                    dataSourceList.find(
+                      (item) =>
+                        item.id !== sourceDataSourceId &&
+                        item.sourceType === sourceItem.sourceType,
+                    )?.id || sourceDataSourceId;
+                  curFormRef?.setFieldsValue({ targetDataSourceId: fallback });
+                  setTargetDataSourceId(fallback);
                 }
               }
             }}