feat: add contextual Target actions

internal/tui/contextual_actions_test.go

@@ -83,6 +83,24 @@ func TestCompleteModelOffersBothExplicitDriftResolutionIntents(t *testing.T) {
 	}
 }
 
+func TestCompleteModelRendersUnknownTargetStateAsStructurallyUnavailable(t *testing.T) {
+	const reason = "Target actions are unavailable because this Target state is unknown"
+	initial := completeTargetSnapshot("", app.TargetAction{DisabledReason: reason})
+	initial.Targets[0].PrimaryAction.Available = false
+	module := &targetModule{snapshot: initial}
+	model := resizedModel(t, module, themeModeNoColor, 120, 36)
+
+	view := model.View()
+	if !strings.Contains(view, "Action: Unavailable") || !strings.Contains(view, "Action unavailable:") || !strings.Contains(view, "state is unknown") || !strings.Contains(view, "Space: Unavailable disabled") {
+		t.Fatalf("unknown Target action was not structurally unavailable:\n%s", view)
+	}
+	updated, command := model.Update(tea.KeyMsg{Type: tea.KeySpace})
+	model = updated.(Model)
+	if command != nil || len(module.intents) != 0 || model.operation.status.Summary != reason {
+		t.Fatalf("unknown Target action dispatched: intents=%#v status=%q\n%s", module.intents, model.operation.status.Summary, model.View())
+	}
+}
+
 func TestCompleteModelUsesStructuredDisabledReasonWithoutInferringFromState(t *testing.T) {
 	initial := completeTargetSnapshot(target.Disabled, app.TargetAction{
 		Kind: app.EnableTargetAction, DisabledReason: "No Active Profile is selected; create or select one before enabling",
@@ -100,6 +118,23 @@ func TestCompleteModelUsesStructuredDisabledReasonWithoutInferringFromState(t *t
 	}
 }
 
+func TestCompleteModelPressingUnavailableTargetActionShowsExactReasonAndDispatchesNoIntent(t *testing.T) {
+	const reason = "GNOME settings schema is unavailable for the owning user"
+	initial := completeTargetSnapshot(target.External, app.TargetAction{
+		Kind: app.ApplyProfileTargetAction, Available: false, DisabledReason: reason,
+	})
+	initial.Targets[0].Available = false
+	module := &targetModule{snapshot: initial}
+	model := resizedModel(t, module, themeModeNoColor, 120, 36)
+	model = updateKey(model, "u")
+
+	updated, command := model.Update(tea.KeyMsg{Type: tea.KeySpace})
+	model = updated.(Model)
+	if command != nil || len(module.intents) != 0 || model.operation.status.Summary != reason {
+		t.Fatalf("unavailable action: command=%v intents=%#v status=%q", command != nil, module.intents, model.operation.status.Summary)
+	}
+}
+
 func TestCompleteModelRestoreOwnershipLossFailsTruthfully(t *testing.T) {
 	initial := completeTargetSnapshot(target.Drifted, app.TargetAction{Kind: app.ResolveDriftTargetAction, Available: true})
 	initial.Targets[0].DriftResolutionActions = []app.TargetAction{