CEX-style deposit address for bridging in

[0xnullifier]

What

CEX-style deposit address for bridging in. Every account's vault-derived EVM address becomes a deposit address on Ethereum Sepolia:

• The Receive screen gains a Miden | Cross-chain tab (QR + copy/share, supported-token chips, recent on-chain activity) showing the EVM deposit address (feature-flag gated, only for accounts with a derived evmAddress).
• A root-mounted DepositAddressWatcher polls the address; when ETH or USDC lands, a "funds arrived" drawer (DepositArrivalDrawer) offers to bridge to Miden in one tap.
• Routing: USDC via Epoch (gasless); ETH via Agglayer (gas self-funded from the deposit) or via Epoch's Fast route (deposit ETH is converted to WETH first, called out in the route picker).
• Everything is signed with the wallet key — no external wallet or WalletConnect — so bridge-in now also works on the extension (arrival detection runs while the popup is open). The WalletConnect flow remains as "Bridge from a connected wallet instead".
• The bridge drawer (app/templates/DepositBridge, assets → amount → route) hands off to /generating-transaction/:txId, which renders the bridged-receive phase ladder. Deep link: /receive?tab=crosschain&bridge=1&token=ETH.

Status

Draft — still WIP; further commits incoming. Rebased on latest main (network-endpoint dev settings, CI changes).

Stacked PR based on this branch: #534 (moves history-detail polling to app-root watchers).

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