feat(client): sync digital employee outbox

qimingclaw/crates/agent-electron-client/src/preload/webviewPerfBridge.ts

@@ -95,5 +95,11 @@ contextBridge.exposeInMainWorld("QimingClawBridge", {
     async getSnapshot() {
       return ipcRenderer.invoke("digitalEmployee:getSnapshot");
     },
+    async getSyncStatus() {
+      return ipcRenderer.invoke("digitalEmployee:getSyncStatus");
+    },
+    async flushSync() {
+      return ipcRenderer.invoke("digitalEmployee:flushSync");
+    },
   },
 });