fix(mackup): update backup path and enhance configuration handling

- Corrected the backup path in the `_in_backup` function to reflect the new structure under `mackup/`.
- Improved error handling in `ssr::mackup::configure` to skip restore if the configuration file is not updated, providing user feedback.
- Updated `ssr::sync` to conditionally execute backup based on configuration validity, enhancing robustness.
- Revised documentation in configuration examples to clarify the new Mackup directory structure and its implications for users.

bin/ssr-mackup

@@ -71,7 +71,7 @@ cmd_scan() {
         done <<< "$declared"
         return 1
     }
-    _in_backup() { [[ -n "$mackup_dir" && -e "$mackup_dir/$1" ]]; }
+    _in_backup() { [[ -n "$mackup_dir" && -e "$mackup_dir/mackup/$1" ]]; }
 
     # -----------------------------------------------------------------------
     # Collect candidate items — same logic as generate_custom_cfg.

bin/ssr-restore

@@ -90,7 +90,10 @@ ssr::icloud::prefetch "$mackup_dir"
 # ssr::mackup::restore already calls ssr::icloud::wait internally.
 _ssr_mackup_restore_step() {
     ssr::mackup::ensure_installed
-    ssr::mackup::configure "$mackup_dir"
+    ssr::mackup::configure "$mackup_dir" || {
+        ssr::warn "Skipping mackup restore — ~/.mackup.cfg was not updated (see messages above)."
+        return 1
+    }
     ssr::mackup::restore
 }
 

bin/ssr-sync

@@ -39,7 +39,8 @@ ssr::icloud::prefetch "$mackup_dir"
 
 ssr::brew::ensure_installed
 ssr::mackup::ensure_installed
-ssr::mackup::configure "$mackup_dir"
+_mackup_cfg_ok=true
+ssr::mackup::configure "$mackup_dir" || _mackup_cfg_ok=false
 
 ssr::brew::update
 ssr::brew::upgrade
@@ -48,7 +49,11 @@ ssr::brew::upgrade
 # Timeout (seconds) is configurable; default 180s.
 ssr::icloud::wait "$mackup_dir" "${SSR_ICLOUD_WAIT_TIMEOUT:-180}"
 
-ssr::mackup::backup
+if [[ "$_mackup_cfg_ok" == true ]]; then
+    ssr::mackup::backup
+else
+    ssr::warn "Skipping mackup backup — ~/.mackup.cfg was not updated (see messages above)."
+fi
 ssr::brew::dump "$backup_dir"
 ssr::brew::cleanup