First row of tests and fixes

module/applications/sheets/base-item-sheet.mjs

@@ -30,7 +30,9 @@ export default class AwEItemSheet extends HandlebarsApplicationMixin(foundry.app
     dragDrop: [{ dragSelector: "[data-drag]", dropSelector: null }],
     actions: {
       toggleSheet: AwEItemSheet.#onToggleSheet,
-      editImage: AwEItemSheet.#onEditImage
+      editImage: AwEItemSheet.#onEditImage,
+      addTrait: AwEItemSheet.#onAddTrait,
+      removeTrait: AwEItemSheet.#onRemoveTrait
     }
   }
 
@@ -77,6 +79,16 @@ export default class AwEItemSheet extends HandlebarsApplicationMixin(foundry.app
   _onRender(context, options) {
     super._onRender(context, options)
     this.#dragDrop.forEach(d => d.bind(this.element))
+    // Bind Enter key on tag input fields to trigger the addTrait/addSpecialization actions
+    this.element.querySelectorAll("input.new-tag[data-action]").forEach(input => {
+      input.addEventListener("keydown", event => {
+        if (event.key !== "Enter") return
+        event.preventDefault()
+        const actionName = input.dataset.action
+        const handler = this.options.actions?.[actionName]
+        if (handler) handler.call(this, event, input)
+      })
+    })
   }
 
   // #region Drag-and-Drop Workflow
@@ -182,4 +194,34 @@ export default class AwEItemSheet extends HandlebarsApplicationMixin(foundry.app
   }
 
   // #endregion
+
+  // #region Array field helpers (traits, specializations)
+  /**
+   * Handle adding a tag (trait, specialization) from the input field.
+   * @param {PointerEvent|KeyboardEvent} event - The initiating event.
+   * @param {HTMLElement} target - The input element.
+   */
+  static async #onAddTrait(event, target) {
+    const value = target.value.trim()
+    if (!value) return
+    const fieldName = target.dataset.field ?? "system.traits"
+    const current = foundry.utils.getProperty(this.document, fieldName) ?? []
+    await this.document.update({ [fieldName]: [...current, value] })
+    target.value = ""
+  }
+
+  /**
+   * Handle removing a tag (trait, specialization) from an array field.
+   * @param {PointerEvent} event - The initiating click event.
+   * @param {HTMLElement} target - The remove button.
+   */
+  static async #onRemoveTrait(event, target) {
+    const index = Number(target.dataset.index)
+    const fieldName = target.dataset.field ?? "system.traits"
+    const current = [...(foundry.utils.getProperty(this.document, fieldName) ?? [])]
+    current.splice(index, 1)
+    await this.document.update({ [fieldName]: current })
+  }
+
+  // #endregion
 }