fix: Close viewer if we navigate back in browser history

Signed-off-by: Julius Knorr <jus@bitgrid.net>
Signed-off-by: nextcloud-command <nextcloud-command@users.noreply.github.com>

cypress/e2e/navigation.cy.ts

@@ -0,0 +1,29 @@
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+describe('Browser navigation', function() {
+	before(function() {
+		// Init user
+		cy.createRandomUser().then(user => {
+			// Upload test files
+			cy.uploadFile(user, 'image.png', 'image/png', '/image1.png')
+
+			// Visit nextcloud
+			cy.login(user)
+			cy.visit('/apps/files')
+		})
+	})
+	after(function() {
+		cy.logout()
+	})
+
+	it('Navigating back to the files overview', function() {
+		cy.getFile('image1.png', { timeout: 10000 })
+		cy.openFile('image1.png')
+		cy.get('body > .viewer').should('be.visible')
+		cy.go('back')
+		cy.get('body > .viewer').should('not.exist')
+	})
+})