diff --git a/internal/db/metadata/data.go b/internal/db/metadata/data.go
index c56c320..afc7491 100644
--- a/internal/db/metadata/data.go
+++ b/internal/db/metadata/data.go
@@ -98,6 +98,9 @@ func convertValueToString(val interface{}) string {
 			return fmt.Sprintf("%v", val)
 		}
 		return string(jsonBytes)
+	case [16]byte:
+		// UUID from PostgreSQL
+		return fmt.Sprintf("%x-%x-%x-%x-%x", v[:4], v[4:6], v[6:8], v[8:10], v[10:])
 	case []byte:
 		// Might be raw JSON bytes
 		return string(v)
diff --git a/internal/db/query/executor.go b/internal/db/query/executor.go
index 35703bf..25900b7 100644
--- a/internal/db/query/executor.go
+++ b/internal/db/query/executor.go
@@ -79,6 +79,9 @@ func convertValueToString(val interface{}) string {
 			return fmt.Sprintf("%v", val)
 		}
 		return string(jsonBytes)
+	case [16]byte:
+		// UUID from PostgreSQL
+		return fmt.Sprintf("%x-%x-%x-%x-%x", v[:4], v[4:6], v[6:8], v[8:10], v[10:])
 	case []byte:
 		// Might be raw JSON bytes
 		return string(v)
diff --git a/internal/ui/components/table_view_pin_test.go b/internal/ui/components/table_view_pin_test.go
index 3d0fdd6..0befd27 100644
--- a/internal/ui/components/table_view_pin_test.go
+++ b/internal/ui/components/table_view_pin_test.go
@@ -128,7 +128,7 @@ func TestTableView_IsPinned(t *testing.T) {
 	tv.SetData(columns, rows, 3)
 
 	tv.SelectedRow = 1
-	tv.TogglePin()
+	_ = tv.TogglePin()
 
 	if !tv.IsPinned(1) {
 		t.Fatal("row 1 should be pinned")
@@ -153,9 +153,9 @@ func TestTableView_ClearPins(t *testing.T) {
 
 	// Pin multiple rows
 	tv.SelectedRow = 0
-	tv.TogglePin()
+	_ = tv.TogglePin()
 	tv.SelectedRow = 1
-	tv.TogglePin()
+	_ = tv.TogglePin()
 
 	if tv.GetPinnedCount() != 2 {
 		t.Fatalf("expected 2 pinned rows, got %d", tv.GetPinnedCount())