feat(cua): release 0.38.0+artemis.1 with verified shell observation

Upgrade the pinned driver, validate menu and taskbar focus ownership, patch untitled Shell resolution, and remove duplicate scroll scaling. Publish package provenance, verification boundaries and matching marketplace checksum. Go tests, vet, build and byte-level package verification passed.

plugins/cua-driver/shell_test.go

@@ -0,0 +1,96 @@
+package main
+
+import "testing"
+
+func shellFixtureWindow(pid, hwnd int64, class string) obj {
+	return obj{"pid": pid, "window_id": hwnd, "class_name": class,
+		"is_on_screen": true, "app_name": "explorer.exe", "title": ""}
+}
+
+func TestUntitledShellDiscoveryKeepsAppAndPIDScope(t *testing.T) {
+	native := []obj{shellFixtureWindow(1, 10, "Shell_TrayWnd"), shellFixtureWindow(2, 20, "NotifyIconOverflowWindow")}
+	for _, query := range []obj{{"pid": 1}, {"app": "Explorer", "pid": 1}, {"app": "explorer.exe", "pid": 1}} {
+		r := supplementShellWindows(obj{"structuredContent": obj{"windows": []any{}}}, query, native)
+		windows := items(object(r["structuredContent"])["windows"])
+		if len(windows) != 1 || num(object(windows[0])["window_id"]) != 10 {
+			t.Fatal(r)
+		}
+	}
+	r := supplementShellWindows(obj{"structuredContent": obj{"windows": []any{}}}, obj{"app": "Brave"}, native)
+	if len(items(object(r["structuredContent"])["windows"])) != 0 {
+		t.Fatal("widened app scope")
+	}
+	broken := obj{"isError": true}
+	if supplementShellWindows(broken, obj{}, native)["isError"] != true {
+		t.Fatal("observation error hidden")
+	}
+}
+
+func TestWinBObservationFollowsActualTaskbarFocus(t *testing.T) {
+	args := obj{"pid": 1, "window_id": 10}
+	requested := shellFixtureWindow(1, 10, "Progman")
+	focus := obj{"probe_ok": true, "focus_root": shellFixtureWindow(1, 20, "Shell_TrayWnd"),
+		"foreground_window": requested} // Foreground HWND alone would give the wrong answer.
+	next, reason := postActionTarget(args, requested, focus, nil)
+	if num(next["window_id"]) != 20 || reason != "associated_native_keyboard_focus" {
+		t.Fatal(next, reason)
+	}
+	if num(args["window_id"]) != 10 {
+		t.Fatal("requested target history mutated")
+	}
+}
+
+func TestPostActionNeverCapturesUnrelatedApplicationOrAmbiguousMenu(t *testing.T) {
+	args := obj{"pid": 1, "window_id": 10}
+	requested := shellFixtureWindow(1, 10, "Progman")
+	for _, other := range []obj{shellFixtureWindow(2, 20, "Shell_TrayWnd"), shellFixtureWindow(1, 20, "OtherApp")} {
+		next, _ := postActionTarget(args, requested, obj{"probe_ok": true, "focus_root": other}, nil)
+		if num(next["window_id"]) != 10 {
+			t.Fatal("unrelated focus captured", next)
+		}
+	}
+	menu := shellFixtureWindow(1, 30, "#32768")
+	menu["owner_id"] = int64(10)
+	menu2 := shellFixtureWindow(1, 40, "#32768")
+	menu2["owner_id"] = int64(10)
+	focus := obj{"probe_ok": true, "menu_active": true, "menu_owner": requested}
+	next, reason := postActionTarget(args, requested, focus, []obj{menu, menu2})
+	if num(next["window_id"]) != 10 || reason != "ambiguous_active_menu_observe_candidates_explicitly" {
+		t.Fatal(next, reason)
+	}
+}
+
+func TestOwnedNativeMenuAndOverflowHaveIndependentObservationTargets(t *testing.T) {
+	args := obj{"pid": 1, "window_id": 10}
+	owner := shellFixtureWindow(1, 10, "Shell_TrayWnd")
+	menu := shellFixtureWindow(1, 30, "#32768")
+	menu["owner_id"] = int64(10)
+	focus := obj{"probe_ok": true, "menu_active": true, "menu_owner": owner}
+	next, _ := postActionTarget(args, owner, focus, []obj{menu})
+	if num(next["window_id"]) != 30 {
+		t.Fatal(next)
+	}
+	next, _ = postActionTarget(args, owner, obj{"probe_ok": true,
+		"focus_root": shellFixtureWindow(1, 40, "TopLevelWindowForOverflowXamlIsland")}, nil)
+	if num(next["window_id"]) != 40 {
+		t.Fatal(next)
+	}
+}
+
+func TestNativeMenuWithoutGWOwnerRequiresVerifiedMenuOwnerAndThread(t *testing.T) {
+	args := obj{"pid": 1, "window_id": 10}
+	owner := shellFixtureWindow(1, 10, "ordinary-form")
+	owner["thread_id"] = int64(7)
+	menu := shellFixtureWindow(1, 30, "#32768")
+	menu["owner_id"], menu["thread_id"] = int64(0), int64(7)
+	focus := obj{"probe_ok": true, "menu_active": true, "menu_owner": owner}
+	next, _ := postActionTarget(args, owner, focus, []obj{menu})
+	if num(next["window_id"]) != 30 {
+		t.Fatal(next)
+	}
+	menu["thread_id"] = int64(8)
+	next, _ = postActionTarget(args, owner, focus, []obj{menu})
+	if num(next["window_id"]) != 10 {
+		t.Fatal("unrelated menu followed", next)
+	}
+}