fix(files_sharing): Create download attribute when toggling checkbox if missing

Previously, toggling the checkbox did not create the 'download' attribute if it was missing,

causing it to become unresponsive after a page reload. Now, setShareAttribute ensures the

attribute is updated or created correctly.

Signed-off-by: nfebe <fenn25.fn@gmail.com>

[skip ci]

Author: nfebe

apps/files_sharing/src/views/SharingDetailsTab.vue

@@ -736,6 +736,30 @@ export default {
 	},
 
 	methods: {
+		/**
+		 * Set a share attribute on the current share
+		 * @param {string} scope The attribute scope
+		 * @param {string} key The attribute key
+		 * @param {boolean} value The value
+		 */
+		 setShareAttribute(scope, key, value) {
+			if (!this.share.attributes) {
+				this.$set(this.share, 'attributes', [])
+			}
+
+			const attribute = this.share.attributes
+				.find((attr) => attr.scope === scope || attr.key === key)
+
+			if (attribute) {
+				attribute.value = value
+			} else {
+				this.share.attributes.push({
+					scope,
+					key,
+					value,
+				})
+			}
+		},
 		updateAtomicPermissions({
 			isReadChecked = this.hasRead,
 			isEditChecked = this.canEdit,