fix(restheadspec): return 200 OK with empty body instead of 204 on zero results

Frontend clients are sensitive to 204 No Content responses; always return 200
with an empty array/object and rely on X-No-Data-Found header to signal absence
of records.

Also treat "change" as an alias for "update" in recursive CUD processing.

pkg/common/recursive_crud.go

@@ -141,7 +141,7 @@ func (p *NestedCUDProcessor) ProcessNestedCUD(
 			logger.Debug("Skipping insert for %s - no data columns besides _request", tableName)
 		}
 
-	case "update":
+	case "update", "change":
 		// Only perform update if we have data to update
 		if hasData {
 			rows, err := p.processUpdate(ctx, regularData, tableName, data[pkName])

pkg/restheadspec/empty_result_test.go

@@ -14,23 +14,23 @@ func TestNormalizeResultArray_EmptyArrayWhenNoID(t *testing.T) {
 	handler := &Handler{}
 
 	tests := []struct {
-		name            string
+		name             string
-		input           interface{}
+		input            interface{}
 		shouldBeEmptyObj bool
 	}{
 		{
-			name:            "nil should return empty object",
+			name:             "nil should return empty object",
-			input:           nil,
+			input:            nil,
 			shouldBeEmptyObj: true,
 		},
 		{
-			name:            "empty slice should return empty object",
+			name:             "empty slice should return empty object",
-			input:           []*EmptyTestModel{},
+			input:            []*EmptyTestModel{},
 			shouldBeEmptyObj: true,
 		},
 		{
-			name:            "single element should return the element",
+			name:             "single element should return the element",
-			input:           []*EmptyTestModel{{ID: 1, Name: "test"}},
+			input:            []*EmptyTestModel{{ID: 1, Name: "test"}},
 			shouldBeEmptyObj: false,
 		},
 		{
@@ -138,9 +138,9 @@ func TestSendResponseWithOptions_NoDataFoundHeader(t *testing.T) {
 		t.Errorf("Expected X-No-Data-Found header to be 'true', got '%s'", mockWriter.headers["X-No-Data-Found"])
 	}
 
-	// Check status code is 204 when no records found
+	// Check status code is 200 even when no records found
-	if mockWriter.statusCode != 204 {
+	if mockWriter.statusCode != 200 {
-		t.Errorf("Expected status code 204, got %d", mockWriter.statusCode)
+		t.Errorf("Expected status code 200, got %d", mockWriter.statusCode)
 	}
 
 	// Verify the body is an empty array (list request, SingleRecordAsObject not set)

pkg/restheadspec/handler.go

@@ -2507,11 +2507,7 @@ func (h *Handler) sendResponseWithOptions(w common.ResponseWriter, data interfac
 		data = h.normalizeResultArray(data)
 	}
 
-	if dataLen == 0 {
+	w.WriteHeader(http.StatusOK)
-		w.WriteHeader(http.StatusNoContent)
-	} else {
-		w.WriteHeader(http.StatusOK)
-	}
 
 	if err := w.WriteJSON(data); err != nil {
 		logger.Error("Failed to write JSON response: %v", err)