azf20/seven-seven-zero-two ? reverse-engineered prompt

Build me a simple demo app that helps people understand EIP 7702 by actually using it, not just reading about it. I want a browser based burner wallet that gets stored locally, then a flow where the user can activate delegation to a greeter style contract, set an initial greeting, later change that greeting without paying gas themselves, and also revoke the delegation back to normal.

Please also include a second demo that shows batching. It should let someone use a fresh burner wallet, collect a few sample assets from example contracts, then move them to another burner in one action so the flexibility of 7702 is obvious. I also want a clear under the hood view so users can see the related contract code and what storage changes after each step.

Make it work on the Odyssey testnet and also locally with a faucet style sponsor for transactions. Keep the UI straightforward and educational. If anything is unclear, look up the current docs online and make sensible choices.