fix: resolve Verify Address crash caused by conditional hook call in ConnectChannel

[Copilot]

Tapping "Verify Address" on the Receive screen instantly crashed the app due to a React Rules of Hooks violation in ConnectChannel.tsx.

Root Cause

useVault was called inside a conditional block, which corrupts React's hook call order and causes an immediate runtime crash:

// ❌ Before — illegal hook call inside conditional
if (mode === InteracationMode.ADDRESS_VERIFICATION) {
  const { activeVault: vault } = useVault({ vaultId }); // crash
  ...
}

Fix

Hoisted useVault to the top level of ConnectChannel. The conditional block is retained solely for deriving address-verification values from the vault result:

// ✅ After — hook at top level, derivation gated by condition
const { activeVault: vault } = useVault({ vaultId });

if (mode === InteracationMode.ADDRESS_VERIFICATION) {
  // derive descriptorString, miniscriptPolicy, receivingAddress, etc.
}

Affects all hardware signers routed through ConnectChannel for address verification (BitBox02, Ledger, Trezor, Coldcard, Jade). No logic or UX changes.

[Parsh]

Specs check: passed.