Notification bell: drop the "Browse all crews" footer

A notification center should surface the user's own actionable items, not a
generic nav shortcut — and it showed on every tab (including Social) where it
made even less sense. Removed the footer entirely; the tabs now sit flush.

Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>

src/components/NotificationBell.tsx

@@ -314,18 +314,6 @@ export function NotificationBell({ className }: { className?: string }) {
             </TabsContent>
           </ScrollArea>
         </Tabs>
-
-        <div className="border-t border-white/10 p-2">
-          <Button
-            asChild
-            variant="ghost"
-            size="sm"
-            className="w-full text-xs font-bold text-gray-400 hover:text-teal-400"
-            onClick={() => setOpen(false)}
-          >
-            <Link to="/crews">Browse all crews</Link>
-          </Button>
-        </div>
       </PopoverContent>
     </Popover>
   );