Restore "Submissions" entry in admin sidebar

The v7->v9 upgrade migrated the CLARIN admin sidebar entries to the new
menu-provider architecture but dropped the "Submissions" link. Re-add it
as a dedicated SubmissionsMenuProvider (link to /mydspace, upload icon,
always visible), matching the v7 fork behaviour.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: Matus Kasak

src/app/app.menus.ts

@@ -31,6 +31,7 @@ import { NotificationsMenuProvider } from './shared/menu/providers/notifications
 import { ProcessesMenuProvider } from './shared/menu/providers/processes.menu';
 import { RegistriesMenuProvider } from './shared/menu/providers/registries.menu';
 import { StatisticsMenuProvider } from './shared/menu/providers/statistics.menu';
+import { SubmissionsMenuProvider } from './shared/menu/providers/submissions.menu';
 import { SystemWideAlertMenuProvider } from './shared/menu/providers/system-wide-alert.menu';
 import { WithdrawnReinstateItemMenuProvider } from './shared/menu/providers/withdrawn-reinstate-item.menu';
 import { WorkflowMenuProvider } from './shared/menu/providers/workflow.menu';
@@ -60,6 +61,8 @@ export const MENUS = buildMenuStructure({
   [MenuID.ADMIN]: [
     NewMenuProvider,
     EditMenuProvider,
+    // CLARIN/LINDAT: "Submissions" link to MyDSpace (ported from the v7 fork)
+    SubmissionsMenuProvider,
     ImportMenuProvider,
     ExportMenuProvider,
     NotificationsMenuProvider,

src/app/shared/menu/providers/submissions.menu.ts

@@ -0,0 +1,41 @@
+/**
+ * The contents of this file are subject to the license and copyright
+ * detailed in the LICENSE and NOTICE files at the root of the source
+ * tree and available online at
+ *
+ * http://www.dspace.org/license/
+ */
+
+import { Injectable } from '@angular/core';
+import {
+  Observable,
+  of,
+} from 'rxjs';
+
+import { MenuItemType } from '../menu-item-type.model';
+import {
+  AbstractMenuProvider,
+  PartialMenuSection,
+} from '../menu-provider.model';
+
+/**
+ * CLARIN/LINDAT: "Submissions" entry in the admin sidebar (ported from the v7 fork's menu.resolver.ts).
+ * Links to the user's MyDSpace page and is always visible, matching the original fork behaviour.
+ */
+@Injectable()
+export class SubmissionsMenuProvider extends AbstractMenuProvider {
+
+  public getSections(): Observable<PartialMenuSection[]> {
+    return of([
+      {
+        visible: true,
+        model: {
+          type: MenuItemType.LINK,
+          text: 'menu.section.submissions',
+          link: '/mydspace',
+        },
+        icon: 'upload',
+      },
+    ] as PartialMenuSection[]);
+  }
+}