feat: collapse but avtive channel and DM

src/routes/chat/DMList/NavItem.js

@@ -88,7 +88,7 @@ const NavItem = ({ uid, mid, unreads, setFiles }) => {
       <NavLink
         ref={drop}
         key={uid}
-        className={`session ${isActive ? "drop_over" : ""}`}
+        className={`link session ${isActive ? "drop_over" : ""}`}
         to={`/chat/dm/${uid}`}
         onContextMenu={handleContextMenuEvent}
       >

src/routes/chat/styled.js

@@ -142,7 +142,7 @@ const StyledWrapper = styled.div`
         .title .icon {
           transform: rotate(-90deg);
         }
-        > .nav {
+        > .nav > .link:not(.active) {
           display: none;
         }
       }