Webdav (#923)

* feat: WebDAV backup/restore

- Add WebDAV test/backup/restore commands and settings\n- Fix ja i18n missing keys; decode PROPFIND href as UTF-8\n- Stabilize Windows prompt auto-import tests via CC_SWITCH_TEST_HOME

* chore: format and minor cleanups

* fix: update build config

* feat(webdav): unify sync UX and hardening fixes

* fix(webdav): harden sync flow and stabilize sync UX/tests

* fix(webdav): add resource limits to skills.zip extraction

Prevent zip bomb / resource exhaustion by enforcing:
- MAX_EXTRACT_ENTRIES (10,000 files)
- MAX_EXTRACT_BYTES (512 MB cumulative)

* refactor(webdav): drop deviceId and display deviceName only

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Co-authored-by: small-lovely-cat <77799160+small-lovely-cat@users.noreply.github.com>
Co-authored-by: saladday <1203511142@qq.com>

tests/integration/SettingsDialog.test.tsx

@@ -28,6 +28,7 @@ vi.mock("@/components/ui/dialog", () => ({
   DialogHeader: ({ children }: any) => <div>{children}</div>,
   DialogFooter: ({ children }: any) => <div>{children}</div>,
   DialogTitle: ({ children }: any) => <h2>{children}</h2>,
+  DialogDescription: ({ children }: any) => <div>{children}</div>,
 }));
 
 const TabsContext = React.createContext<{