Show connected wallet address alongside Farcaster profile in nav

[realproject7]

Problem

When a user connects their wallet and has a Farcaster profile, the nav only shows their Farcaster username/PFP. But one FID can have multiple verified wallet addresses — the user needs to know which specific wallet is currently connected.

Requirements

Wherever the connected Farcaster profile is displayed (likely the nav bar / connect wallet area), show the truncated wallet address alongside the Farcaster identity:

Example:

🟢 @project7  0x0175...4dbf

Or stacked:

@project7
0x0175...4dbf

• Show the truncated connected wallet address (e.g., 0x0175...4dbf)
• Keep the Farcaster username/PFP as primary identity
• Wallet address is secondary/smaller text
• Must update when the user switches wallets

Files to modify

• src/components/ConnectWallet.tsx or wherever the connected state is displayed in the nav
• Possibly src/components/NavBar.tsx

Branch

task/614-show-connected-wallet

Acceptance criteria

• Connected wallet address visible alongside Farcaster profile
• Address is truncated (e.g., 0x0175...4dbf)
• Updates correctly when wallet is switched
• Mobile responsive — doesn't break nav layout
• Build passes