TON Connect UI update

The connection modal now shows Telegram and Gram Wallet as separate buttons above the regular wallet list (instead of a single hardcoded “Wallet in Telegram” button).

Labels and styling come from the wallet registry — e.g. Gram Wallet uses a transparent button style.

This is just a TON Connect interface change, not an update to the wallets themselves.

Note: Gram Wallet is the standalone app from the My Wallet team (ex-MyTonWallet).