imageFilenames and imageFilename, backend integration tests, frontend tests, removed username references

backend/migrations/20251126000001-alter-items-images-to-text.js

@@ -0,0 +1,19 @@
+"use strict";
+
+module.exports = {
+  up: async (queryInterface, Sequelize) => {
+    // Change images column from VARCHAR(255)[] to TEXT[] to support longer URLs
+    await queryInterface.changeColumn("Items", "images", {
+      type: Sequelize.ARRAY(Sequelize.TEXT),
+      defaultValue: [],
+    });
+  },
+
+  down: async (queryInterface, Sequelize) => {
+    // Revert to original VARCHAR(255)[] - note: this may fail if data exceeds 255 chars
+    await queryInterface.changeColumn("Items", "images", {
+      type: Sequelize.ARRAY(Sequelize.STRING),
+      defaultValue: [],
+    });
+  },
+};