Issue #3173756 by paulocs, anmolgoyal74, eric.chenchao: Add local task link "View" to contact form

core/modules/contact/contact.links.task.yml

+entity.contact_form.canonical:
+  title: 'View'
+  route_name: entity.contact_form.canonical
+  weight: 0
+  base_route: entity.contact_form.edit_form
+
 entity.contact_form.edit_form:
   title: 'Edit'
   route_name: entity.contact_form.edit_form
+  weight: 1
   base_route: entity.contact_form.edit_form
 
 entity.user.contact_form:

core/modules/contact/tests/src/Functional/ContactSitewideTest.php

@@ -50,6 +50,7 @@ class ContactSitewideTest extends BrowserTestBase {
   protected function setUp(): void {
     parent::setUp();
     $this->drupalPlaceBlock('system_breadcrumb_block');
+    $this->drupalPlaceBlock('local_tasks_block');
     $this->drupalPlaceBlock('local_actions_block');
     $this->drupalPlaceBlock('page_title_block');
   }
@@ -291,6 +292,9 @@ public function testSiteWideContact() {
     $this->assertSession()->statusCodeEquals(200);
     $this->assertSession()->fieldValueEquals('label', $label);
 
+    // Verify contact "View" tab exists.
+    $this->assertSession()->linkExists('View');
+
     // Test field UI and field integration.
     $this->drupalGet('admin/structure/contact');