fix: 打开流程归一化写盘后用最新 meta 加载编辑器，消除首次保存误报冲突

src/renderer/src/App.tsx

@@ -121,8 +121,14 @@ export function App() {
     try {
       const loaded = await window.rpa.flows.get(id);
       const flow = normalizeLegacyLinearLayout(loaded);
-      if (flow !== loaded) await window.rpa.flows.save(flow, { force: true });
-      loadFlow(flow);
+      if (flow !== loaded) {
+        // 归一化改写了布局：强制写盘后必须用保存返回的新 meta 加载，
+        // 否则编辑器持有旧 updatedAt，首次保存会误判磁盘版本冲突
+        const saved = await window.rpa.flows.save(flow, { force: true });
+        loadFlow(saved.flow);
+      } else {
+        loadFlow(flow);
+      }
       setActiveFlowId(id);
       setPage("editor");
     } catch (openError) {