fix: address protocol probe review findings

internal/tui/help_dialog_test.go

@@ -1,6 +1,7 @@
 package tui
 
 import (
+	"context"
 	"fmt"
 	"strings"
 	"testing"
@@ -8,6 +9,7 @@ import (
 	tea "github.com/charmbracelet/bubbletea"
 
 	"proxyctl/internal/app"
+	"proxyctl/internal/probe"
 	"proxyctl/internal/profile"
 )
 
@@ -304,10 +306,6 @@ func TestCompleteModelFooterHintsMatchContextAndAcceptedKeys(t *testing.T) {
 		if probeCommand == nil || !strings.Contains(model.View(), "Protocol Probe in progress") || strings.Contains(model.View(), "Ctrl+D: probe") {
 			t.Fatalf("probe footer did not follow accepted in-field action and progress:\n%s", model.View())
 		}
-		model = updateKey(model, "?")
-		assertUsableFrame(t, model.View(), 80, 24, "Protocol Probe is in progress", "Ctrl+D does not start a duplicate probe")
-		model = updateKey(model, "esc")
-
 		model = updateKey(model, "ctrl+t")
 		if strings.Contains(model.View(), "Ctrl+D: probe") || !strings.Contains(model.View(), "advanced mode") {
 			t.Fatalf("Advanced form advertised a Single-field Protocol Probe:\n%s", model.View())
@@ -335,6 +333,37 @@ func TestCompleteModelFooterHintsMatchContextAndAcceptedKeys(t *testing.T) {
 	})
 }
 
+func TestCompleteModelHelpDocumentsProbeShortcutExplicitOnlyAttachmentAndDuplicateSuppression(t *testing.T) {
+	model := openProtocolProbeEditor(t, &recordingModule{}, func(context.Context, string) (probe.Capabilities, error) {
+		return probe.Capabilities{HTTP: true, SOCKS5: true}, nil
+	}, "proxy.example:7890")
+
+	model = updateKey(model, "?")
+	assertUsableFrame(t, model.View(), 80, 24,
+		"Ctrl+D explicitly runs Protocol Probe for the focused Single proxy URL field.",
+		"never runs on form entry, focus changes, or save.")
+	model = updateKey(model, "esc")
+
+	model, command := startProtocolProbe(t, model)
+	updated, duplicate := model.Update(tea.KeyMsg{Type: tea.KeyCtrlD})
+	model = updated.(Model)
+	if duplicate != nil {
+		t.Fatal("repeated Probe shortcut emitted duplicate work")
+	}
+	model = updateKey(model, "?")
+	assertUsableFrame(t, model.View(), 80, 24,
+		"Protocol Probe is in progress for the Single proxy URL field.",
+		"Ctrl+D does not start a duplicate probe")
+	model = updateKey(model, "esc")
+
+	model = finishProtocolProbe(t, model, command)
+	model = updateKey(model, "?")
+	assertUsableFrame(t, model.View(), 80, 24,
+		"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.")
+}
+
 func TestCompleteModelHelpOverEditorPreservesFieldCursorPreviewAndResizeState(t *testing.T) {
 	module := &profileManagementModule{}
 	model := openNewProfileEditor(t, module)