You shouldn’t need to. You need a web-based wallet if you want to use Sundaeswap and interact with the DEX. You’llget your tokens regardless of where you’re staking from. Daedalus supports multi-tokens already but let’s say for some odd reason it doesn’t (or if you decide you want to sell them and want to send them to a different online web-based wallet) AND for some reason you can’t just transfer your Sundae tokens out of Daedalus… worse case scenario you can restore your Daedalus-based wallet to another web-based one and do whatever you please. Remember a wallet is just an interface to what the blockchain is. Your tokens will be awarded to you on the blockchain, if a certain “view” of the blockchain is incompatible or doesn’t provide the functionality you need, you can always restore your wallet somewhere else and look at the blockchain using a different wallet. Your rewards go to your staking address, nothing will change that regardless of which wallet you use.
Remember blockchain = truth. Wallet is some visual/functional representation of that truth.
For completeness here are a few web-based Cardano wallets:
There is one more very similar to ccvault with arguably a better interface but can’t remember its name atm.
Hope that helps.