fix: SFTP auto-refresh after file transfer

- Added program *tea.Program to SFTPBrowserTab and Model
- SetProgram() allows goroutines to send messages to Bubble Tea
- After transfer: program.Send(sftpRefreshMsg{}) triggers re-render
- Model stores program reference, passes to SFTP tab on creation

pkg/tui/sftp_browser_tab.go

@@ -69,6 +69,8 @@ type SFTPBrowserTab struct {
 	transferring bool
 	transferMsg  string
 
+	program *tea.Program
+
 	mu        sync.Mutex
 	closeOnce sync.Once
 }
@@ -98,6 +100,10 @@ func NewSFTPBrowserTab(host *models.Host, dataDir string) *SFTPBrowserTab {
 
 func (t *SFTPBrowserTab) Name() string { return "SFTP: " + t.host.Name }
 
+func (t *SFTPBrowserTab) SetProgram(p *tea.Program) {
+	t.program = p
+}
+
 func (t *SFTPBrowserTab) Init() tea.Cmd {
 	go t.connect()
 	go t.refreshLocal()
@@ -497,11 +503,21 @@ func (t *SFTPBrowserTab) copyFile(srcType, dstType paneType, srcPath, dstPath, n
 		t.refreshLocal()
 	}
 
+	// Trigger re-render in Bubble Tea
+	if t.program != nil {
+		t.program.Send(sftpRefreshMsg{})
+	}
+
 	// Clear success message after brief delay
 	time.Sleep(1 * time.Second)
 	t.mu.Lock()
 	t.transferMsg = ""
 	t.mu.Unlock()
+
+	// Trigger re-render again after clearing message
+	if t.program != nil {
+		t.program.Send(sftpRefreshMsg{})
+	}
 }
 
 func downloadFile(client *sftp.Client, remotePath, localPath string, progressFn func(int64)) error {