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

---------

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

src-tauri/src/commands/mod.rs

@@ -17,7 +17,9 @@ mod session_manager;
 mod settings;
 pub mod skill;
 mod stream_check;
+mod sync_support;
 mod usage;
+mod webdav_sync;
 
 pub use config::*;
 pub use deeplink::*;
@@ -37,3 +39,4 @@ pub use settings::*;
 pub use skill::*;
 pub use stream_check::*;
 pub use usage::*;
+pub use webdav_sync::*;