fix: Nachrichten-Punkt fehlte im mobilen Apps-Menue

frontend/src/App.jsx

@@ -373,7 +373,7 @@ function BottomNav({ active, setActive, user, onLogout, unreadMsgs=0, hexWarsTur
                 </button>
                 {!isGrpCollapsed && tools.map(t => (
                   <MI key={t.id} Icon={t.Icon}
-                    label={t.label} dot={(t.id==='gebietseroberung' && hexWarsTurns>0) || (t.id==='whiteboard' && whiteboardUnread>0)}
+                    label={t.label} dot={(t.id==='gebietseroberung' && hexWarsTurns>0) || (t.id==='whiteboard' && whiteboardUnread>0) || (t.id==='nachrichten' && unreadMsgs>0)}
                     onClick={() => { setActive(t.id); setAppsOpen(false); }} />
                 ))}
               </div>