fix: SFTP auto-refresh + filter mode + delete refresh

- Clear dirCache before refresh after transfer/delete/mkdir
- Cache was stale: old entries returned instead of fresh data
- Filter mode: allow commands (c,d,n,r) and nav (↑↓,Tab) to pass through
- Filter mode no longer blocks transfer/delete/mkdir/pane-switch
- Delete: clear cache + program.Send() for re-render
- Mkdir: clear cache + program.Send() for re-render

CHANGELOG.md

@@ -59,6 +59,14 @@
 - After transfer: `t.program.Send(sftpRefreshMsg{})` triggers re-render
 - Model stores program reference, passes it to SFTP tab on creation
 
+### SFTP Bug Fixes
+- Auto-refresh: clear dirCache before refresh after transfer/delete/mkdir
+- Cache was stale after file operations — old entries returned instead of fresh
+- Filter mode: allow command keys (c, d, n, r) and navigation (↑↓, Tab) to pass through
+- Filter mode no longer blocks transfer, delete, mkdir, or pane switch
+- Delete: clear cache + trigger re-render after file removal
+- Mkdir: clear cache + trigger re-render after directory creation
+
 ## v1.0.0 (2025-01-30)
 
 ### Added