feat(v2): implement operator monitoring window

v2/internal/ui/spec_test.go

@@ -4,13 +4,13 @@ import "testing"
 
 func TestMonitorWindowSpecUsesLightMonitoringLayout(t *testing.T) {
 	spec := MonitorWindowSpec()
-	if spec.Title != "Silver Pose V2 · 技术 Spike" {
+	if spec.Title != "Silver Pose V2" {
 		t.Fatalf("title = %q", spec.Title)
 	}
 	if spec.Width != 1120 || spec.Height != 720 {
 		t.Fatalf("size = %dx%d, want 1120x720", spec.Width, spec.Height)
 	}
-	if spec.BackgroundHex != "#F3F6FA" || spec.AlertHex != "#C62828" {
+	if spec.BackgroundHex != "#EAF1F8" || spec.AlertHex != "#C62828" {
 		t.Fatalf("unexpected colours: background=%s alert=%s", spec.BackgroundHex, spec.AlertHex)
 	}
 }