SFTP - No Highlight for Previously Accessed Directory When Navigating Up, and Newly Created Directory Not Auto-Selected

**Problem Description**
When navigating up to the parent directory, the previously accessed subdirectory (the one you were in before navigating up) is not highlighted, making it impossible to quickly locate the directory from the last operation.
After creating a new directory (via right-click menu "New Directory" or other methods), the newly created directory is not automatically selected. You need to manually find and click it to perform subsequent operations (such as entering, renaming, etc.).
**Expected Behavior**
When navigating up to the parent directory, the previously accessed subdirectory should be automatically highlighted to maintain visual context of the operation.
After a new directory is successfully created, it should be automatically selected to facilitate direct performance of subsequent operations.

Version: WindTerm 2.7.0 windows

Start by reproducing both behaviors in the Windows SFTP directory view: navigate into a subdirectory and back up, then create a directory through the context menu. Trace the directory-list selection and refresh handling, and consider the work done when the prior or newly created directory is visibly selected for the next operation.

Written by the indexing model from the issue text.