fix(api/v2): return 200 from notifications mark-all (creates nothing)

pkg/routes/api/v2/notifications.go

@@ -71,6 +71,8 @@ func RegisterNotificationRoutes(api huma.API) {
 		Description: "Marks every notification of the authenticated user as read. Link shares have no notifications and are refused.",
 		Method:      http.MethodPost,
 		Path:        "/notifications",
+		// Override the wrapper's POST→201 create default: this action creates nothing.
+		DefaultStatus: http.StatusOK,
 		Tags:          tags,
 	}, notificationsMarkAllRead)
 }

pkg/webtests/huma_notification_test.go

@@ -93,7 +93,8 @@ func TestHumaNotification_MarkAllAsRead(t *testing.T) {
 	token := humaTokenFor(t, &testuser1)
 
 	rec := humaRequest(t, e, http.MethodPost, "/api/v2/notifications", "", token, "")
-	require.Equal(t, http.StatusCreated, rec.Code, "body: %s", rec.Body.String())
+	// 200, not the wrapper's POST default 201: mark-all creates nothing.
+	require.Equal(t, http.StatusOK, rec.Code, "body: %s", rec.Body.String())
 	assert.Contains(t, rec.Body.String(), `"message":"success"`)
 
 	list := humaRequest(t, e, http.MethodGet, "/api/v2/notifications", "", token, "")