Account / Auth System

[JoaquinBN]

Implement the account identity system based on primary wallet (first wallet user logged in with). Users can link multiple wallets and login with any of them. Email collected separately for notifications. Social handles (Discord, X) are handled in their respective sections.

• Define primary wallet as account primary key (migrate from current email/generated ID)
• Implement multi-wallet support (link additional wallets to account)
• Build "Link Wallet" flow on Profile / Connect Wallet button
• Build "Unlink Wallet" flow with confirmation
• Implement login detection across linked wallets (any linked wallet → same account)
• Handle edge case: wallet already linked to another account