feat(webdav): follow-up 补齐自动同步与大文件防护 (#1043)

* feat(webdav): add robust auto sync with failure feedback

(cherry picked from commit bb6760124a62a964b36902c004e173534910728f)

* fix(webdav): enforce bounded download and extraction size

(cherry picked from commit 7777d6ec2b9bba07c8bbba9b04fe3ea6b15e0e79)

* fix(webdav): only show auto-sync callout for auto-source errors

* refactor(webdav): remove services->commands auto-sync dependency

src/App.tsx

@@ -3,6 +3,7 @@ import { useTranslation } from "react-i18next";
 import { motion, AnimatePresence } from "framer-motion";
 import { toast } from "sonner";
 import { invoke } from "@tauri-apps/api/core";
+import { listen } from "@tauri-apps/api/event";
 import { useQueryClient } from "@tanstack/react-query";
 import {
   Plus,
@@ -81,6 +82,12 @@ type View =
   | "openclawTools"
   | "openclawAgents";
 
+interface WebDavSyncStatusUpdatedPayload {
+  source?: string;
+  status?: string;
+  error?: string;
+}
+
 const DRAG_BAR_HEIGHT = isWindows() || isLinux() ? 0 : 28; // px
 const HEADER_HEIGHT = 64; // px
 const CONTENT_TOP_OFFSET = DRAG_BAR_HEIGHT + HEADER_HEIGHT;
@@ -292,6 +299,49 @@ function App() {
     };
   }, [queryClient]);
 
+  useEffect(() => {
+    let unsubscribe: (() => void) | undefined;
+    let active = true;
+
+    const setupListener = async () => {
+      try {
+        const off = await listen(
+          "webdav-sync-status-updated",
+          async (event) => {
+            const payload = (event.payload ?? {}) as WebDavSyncStatusUpdatedPayload;
+            await queryClient.invalidateQueries({ queryKey: ["settings"] });
+
+            if (payload.source !== "auto" || payload.status !== "error") {
+              return;
+            }
+
+            toast.error(
+              t("settings.webdavSync.autoSyncFailedToast", {
+                error: payload.error || t("common.unknown"),
+              }),
+            );
+          },
+        );
+        if (!active) {
+          off();
+          return;
+        }
+        unsubscribe = off;
+      } catch (error) {
+        console.error(
+          "[App] Failed to subscribe webdav-sync-status-updated event",
+          error,
+        );
+      }
+    };
+
+    void setupListener();
+    return () => {
+      active = false;
+      unsubscribe?.();
+    };
+  }, [queryClient, t]);
+
   useEffect(() => {
     const checkEnvOnStartup = async () => {
       try {