fix(files): Add Sidebar.Tab type in global context

And use proper optional argument syntax for its constructor

Signed-off-by: Louis Chmn <louis@chmn.me>

apps/files/src/models/Tab.js

@@ -22,8 +22,8 @@ export default class Tab {
 	 * @param {object} options destructuring object
 	 * @param {string} options.id the unique id of this tab
 	 * @param {string} options.name the translated tab name
-	 * @param {?string} options.icon the icon css class
+	 * @param {string} [options.icon] the icon css class
-	 * @param {?string} options.iconSvg the icon in svg format
+	 * @param {string} [options.iconSvg] the icon in svg format
 	 * @param {Function} options.mount function to mount the tab
 	 * @param {Function} [options.setIsActive] function to forward the active state of the tab
 	 * @param {Function} options.update function to update the tab

window.d.ts

@@ -3,6 +3,7 @@
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
+import type Tab from './apps/files/src/models/Tab.js'
 import type RouterService from './apps/files/src/services/RouterService.ts'
 import type Settings from './apps/files/src/services/Settings.js'
 import type Sidebar from './apps/files/src/services/Sidebar.js'
@@ -12,6 +13,7 @@ type SidebarAPI = Sidebar & {
 	close: () => void
 	setFullScreenMode: (fullScreen: boolean) => void
 	setShowTagsDefault: (showTagsDefault: boolean) => void
+	Tab: typeof Tab
 }
 
 declare global {