Credit_offer_accept_operation doesn't show in proposals

**Describe the bug**

See https://develop.bitshares.org/#/account/blockchain-prize and screenshots below.

This leads to potential on-chain phishing activities.

Victims may think the proposals are free offers and accept them, and end up losing more.

**Additional Context**

There was PR https://github.com/bitshares/bitshares-ui/pull/2704 to render all operations inside proposals, but the related code hasn't been updated for a long time. When new operations got added to the blockchain, they show as a simple "#" in proposals.
I think the idea behind #2704 was to eventually stop using /app/components/Blockchain/OperationAnt.js to render operations, but unfortunately we're still not there yet.

**Screenshots**


Start with /app/components/Blockchain/OperationAnt.js and the proposal-rendering work described in PR #2704, then reproduce the linked proposal page to inspect how credit_offer_accept_operation appears. Done means the operation is rendered with meaningful details in proposals instead of displaying only “#”; verify the affected proposal view after the change.

Written by the indexing model from the issue text.