refactor(workflow): simplify edge configuration

frontend/src/components/workflow/WorkflowCanvas.tsx

@@ -53,6 +53,7 @@ import {
   type NodeSpecMap,
   type RuntimeNodeSpec,
   type WorkflowGraph,
+  type WorkflowEdgeData,
   type WorkflowNodeData,
   type WorkflowNodeType,
 } from "./specs";
@@ -396,7 +397,7 @@ export function WorkflowCanvas({
   const updateEdgeData = useCallback(
     (
       id: string,
-      patch: WorkflowGraph["edges"][number]["data"],
+      patch: Partial<WorkflowEdgeData>,
     ) => {
       setEdges((es) =>
         es.map((e) => {
@@ -535,6 +536,7 @@ export function WorkflowCanvas({
   const editingNode = nodes.find((n) => n.id === editingNodeId);
   const editingSpec = editingNode ? specsByType[editingNode.type as string] : null;
   const editingEdge = edges.find((e) => e.id === editingEdgeId);
+  const editingEdgeData = editingEdge?.data as WorkflowEdgeData | undefined;
   const addableSpecs = Object.values(specsByType).filter((s) => s.addable);
   const canAddSpec = useCallback(
     (spec: RuntimeNodeSpec) => {
@@ -683,7 +685,27 @@ export function WorkflowCanvas({
                       : settingsOpen
                         ? "工作流设置"
                         : editingEdge
-                          ? "编辑连接条件"
+                          ? (
+                              <EditableTitle
+                                value={editingEdgeData?.label ?? ""}
+                                placeholder={
+                                  editingEdgeData?.mode === "llm"
+                                    ? "大模型判断"
+                                    : editingEdgeData?.mode === "expression"
+                                      ? "表达式"
+                                      : "默认路径"
+                                }
+                                editLabel="连接名称"
+                                variant="panel"
+                                allowEmpty
+                                maxLength={64}
+                                onChange={(label) =>
+                                  updateEdgeData(editingEdge.id, {
+                                    label: label || undefined,
+                                  })
+                                }
+                              />
+                            )
                           : editingNode && editingSpec
                             ? (
                                 <EditableTitle