feat: Update Switch form data #1739 (#2029)

### What problem does this PR solve?

feat: Update Switch form data #1739
### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/flow/hooks.ts

@@ -30,6 +30,7 @@ import {
   NodeMap,
   Operator,
   RestrictedUpstreamMap,
+  SwitchElseTo,
   initialArXivValues,
   initialBaiduFanyiValues,
   initialBaiduValues,
@@ -519,6 +520,17 @@ export const useWatchNodeFormDataChange = () => {
         return pre;
       }, []);
 
+      // Splice the else condition of the conditional judgment to the edge list
+      const elseTo = form[SwitchElseTo];
+      if (elseTo) {
+        downstreamEdges.push({
+          id: uuid(),
+          source: nodeId,
+          target: elseTo,
+          sourceHandle: SwitchElseTo,
+        });
+      }
+
       setEdgesByNodeId(nodeId, downstreamEdges);
     },
     [setEdgesByNodeId],