tested real proxmox connection

--> passed

backend/internal/template/handler.go

@@ -28,6 +28,9 @@ func (h Handler) ListTemplates(w http.ResponseWriter, r *http.Request) {
 		writeError(w, http.StatusInternalServerError, "templates_list_failed")
 		return
 	}
+	if templates == nil {
+		templates = []Template{}
+	}
 
 	writeJSON(w, http.StatusOK, map[string][]Template{"data": templates})
 }
@@ -186,4 +189,4 @@ func writeJSON(w http.ResponseWriter, status int, body any) {
 
 func writeError(w http.ResponseWriter, status int, message string) {
 	writeJSON(w, status, map[string]string{"error": message})
-}
+}

backend/internal/template/handler_test.go

@@ -48,7 +48,7 @@ func TestListTemplatesReturnsTemplates(t *testing.T) {
 }
 
 func TestListTemplatesReturnsEmptyList(t *testing.T) {
-	handler := NewHandler(&stubRepository{templates: []Template{}})
+	handler := NewHandler(&stubRepository{})
 	req := httptest.NewRequest(http.MethodGet, "/internal/templates", nil)
 	rec := httptest.NewRecorder()
 
@@ -57,6 +57,9 @@ func TestListTemplatesReturnsEmptyList(t *testing.T) {
 	if rec.Code != http.StatusOK {
 		t.Fatalf("status = %d, want %d", rec.Code, http.StatusOK)
 	}
+	if got := rec.Body.String(); got != "{\"data\":[]}\n" {
+		t.Fatalf("body = %q, want empty data array", got)
+	}
 }
 
 func TestCreateTemplateReturnsCreated(t *testing.T) {
@@ -205,4 +208,4 @@ func (s *stubRepository) Upsert(_ context.Context, _ Template) (Template, error)
 
 func (s *stubRepository) Delete(_ context.Context, _ string) (bool, error) {
 	return s.deleteResult, nil
-}
+}