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/hooks/useSettings.ts

@@ -135,9 +135,10 @@ export function useSettings(): UseSettingsResult {
         const sanitizedOpencodeDir = sanitizeDir(
           mergedSettings.opencodeConfigDir,
         );
+        const { webdavSync: _ignoredWebdavSync, ...restSettings } = mergedSettings;
 
         const payload: Settings = {
-          ...mergedSettings,
+          ...restSettings,
           claudeConfigDir: sanitizedClaudeDir,
           codexConfigDir: sanitizedCodexDir,
           geminiConfigDir: sanitizedGeminiDir,
@@ -251,9 +252,10 @@ export function useSettings(): UseSettingsResult {
         const previousCodexDir = sanitizeDir(data?.codexConfigDir);
         const previousGeminiDir = sanitizeDir(data?.geminiConfigDir);
         const previousOpencodeDir = sanitizeDir(data?.opencodeConfigDir);
+        const { webdavSync: _ignoredWebdavSync, ...restSettings } = mergedSettings;
 
         const payload: Settings = {
-          ...mergedSettings,
+          ...restSettings,
           claudeConfigDir: sanitizedClaudeDir,
           codexConfigDir: sanitizedCodexDir,
           geminiConfigDir: sanitizedGeminiDir,