[🐴] use "Chats" instead of "Messages" (#4013)

* use "Chats" instead of "Messages"

* chats to chat

* use messages in the header

src/view/shell/bottom-bar/BottomBar.tsx

@@ -216,7 +216,7 @@ export function BottomBar({navigation}: BottomTabBarProps) {
                 notificationCount={numUnreadMessages.numUnread}
                 accessible={true}
                 accessibilityRole="tab"
-                accessibilityLabel={_(msg`Messages`)}
+                accessibilityLabel={_(msg`Chat`)}
                 accessibilityHint={
                   numUnreadMessages.count > 0
                     ? `${numUnreadMessages.numUnread} unread`

src/view/shell/desktop/LeftNav.tsx

@@ -341,7 +341,7 @@ export function DesktopLeftNav() {
               count={numUnreadMessages.numUnread}
               icon={<Message style={pal.text} width={iconWidth} />}
               iconFilled={<MessageFilled style={pal.text} width={iconWidth} />}
-              label={_(msg`Messages`)}
+              label={_(msg`Chat`)}
             />
           )}
           <NavItem