fix(tui): center rows per-line, fix footers per-context

pkg/tui/host_list_tab.go

@@ -192,19 +192,15 @@ func (t *HostListTab) View() string {
 	const sidePad = 6
 	targetW := contentW + sidePad*2
 
-	// Uniform left shift for the row block
-	rowShift := (targetW - widestRow) / 2
-
 	var content strings.Builder
 
 	// Centered title
 	content.WriteString(lipgloss.PlaceHorizontal(targetW, lipgloss.Center, title))
 	content.WriteString("\n\n")
 
-	// Centered rows
-	shift := strings.Repeat(" ", rowShift)
+	// Center each row independently within the box
 	for _, r := range rows[:len(rows)-1] { // exclude footer, added below
-		line := lipgloss.PlaceHorizontal(targetW, lipgloss.Left, shift+r.text)
+		line := lipgloss.PlaceHorizontal(targetW, lipgloss.Center, r.text)
 		content.WriteString(line)
 		content.WriteString("\n")
 	}