Rename wallet popup button: Connect → Track Wallet

[heyitsStylez]

Parent

#16

What to build

Replace the misleading [ Connect ] button label in the first-visit wallet popup with [ Track Wallet ]. The flow does not connect a wallet via any provider — it stores any ETH address in localStorage and uses it as a read-only key for cloud-sync and chain-sync. "Track" is the precise word for read-only address observation and matches existing crypto-product vocabulary (Etherscan watchlist, DeBank follow, Zapper track).

No other strings change. Enter Wallet Address, awaiting input..., and the header [ WALLET ] button are already accurate.

Acceptance criteria

• src/html/body.html:13 button text changed from [ Connect ] to [ Track Wallet ]
• python3 build.py --check passes
• npm test passes (no regression in the wallet-popup integration test, if any)
• Manual smoke: load the built HTML in a browser with localStorage cleared, confirm the popup button reads [ Track Wallet ]

Blocked by

None - can start immediately