fix: address protocol probe review findings

internal/tui/help_dialog.go

@@ -149,8 +149,8 @@ func (p terminalPresentation) contextualHelp(model presentationState) string {
 			default:
 				body.WriteString("The Single proxy URL field visibly offers Protocol Probe; focus that field and press Ctrl+D to run it explicitly.\n")
 			}
-		} else if model.form.probe.feedback != "" {
-			body.WriteString("The Protocol Probe result remains attached to the generated Advanced Profile URL values.\n")
+		} else if model.form.hasProbeSourceAttachment() {
+			body.WriteString("The Protocol Probe result remains attached to its read-only initiating Single proxy URL context. The HTTP, HTTPS, and ALL/SOCKS values were generated from that probe.\n")
 		}
 	default:
 		body.WriteString(p.theme.section.Render("Dashboard"))