I'm looking for something to replace mytrezor.com and installed electrum. However when I installed it (and the trezor python module), it asked for my trezor seed. I understand this has the private seed. This would mean I'm revealing the private keys to electrum. I simply want a watch-only style wallet on my pc, but that uses trezor to sign tx.
Can electrum do this? Any other wallets that do this?
It asked for your seed because you chose "restore wallet" instead of "new wallet." Restore is to get coins from lost or damaged Trezor which needs the seed. Choose new and it will connect to Trezor as you want. Or you can just cancel the restore without inputting seed, open the created wallet file and it will connect to Trezor to finish installing that wallet. It does work without inputting the seed, which you don't want to do obviously.
Well restore wallet seemed most appropriate as the trezor has a wallet on (with funds on it). I just want to confirm it's fine to go ahead as you specify given that I already have funds on the trezor wallet.