feat: add proxy labels and default profiles

internal/domain/browser_test.go

@@ -80,3 +80,13 @@ func TestNormalizeProxyServerCanonicalizesAndRejectsCredentials(t *testing.T) {
 		}
 	}
 }
+
+func TestNormalizeProxyNameRequiresNonEmptyDisplayText(t *testing.T) {
+	got, err := NormalizeProxyName("  新加坡出口  ")
+	if err != nil || got != "新加坡出口" {
+		t.Fatalf("NormalizeProxyName() = %q, %v", got, err)
+	}
+	if _, err := NormalizeProxyName(" \t "); !errors.Is(err, ErrInvalidLaunchSpec) {
+		t.Fatalf("empty proxy name error = %v", err)
+	}
+}