Add tab-switching shortcuts to new tab bar

Closes #541

Tusker/Screens/Main/NewMainTabBarViewController.swift

@@ -314,10 +314,6 @@ final class NewMainTabBarViewController: BaseMainTabBarViewController {
         }
     }
     
-    @objc func handleComposeKeyCommand() {
-        compose(editing: nil)
-    }
-    
     @objc private func sidebarTapped() {
         #if !os(visionOS)
         fastAccountSwitcher?.hide()
@@ -408,6 +404,33 @@ final class NewMainTabBarViewController: BaseMainTabBarViewController {
         return true
     }
     #endif
+    
+    // MARK: Keyboard shortcuts
+    
+    @objc func handleSidebarCommandTimelines() {
+        selectedTab = homeTab
+    }
+    
+    @objc func handleSidebarCommandNotifications() {
+        selectedTab = notificationsTab
+    }
+    
+    @objc func handleSidebarCommandExplore() {
+        selectedTab = exploreTab
+    }
+    
+    @objc func handleSidebarCommandBookmarks() {
+        selectedTab = bookmarksTab
+    }
+    
+    @objc func handleSidebarCommandMyProfile() {
+        selectedTab = myProfileTab
+    }
+    
+    @objc func handleComposeKeyCommand() {
+        compose(editing: nil)
+    }
+
 }
 
 @available(iOS 18.0, *)