Yes, code audit grants, IOK fund and all other grant and funding programs available for Klaytn will be made available for Kaia.
With the upcoming launch of Kaia, a governance vote will be proposed on the Finschia network to smoothly integrate token and governance mechanisms, including potentially reducing the unbonding time from 7 days to a couple of hours. If the vote passes, FNSA holders will be able to unstake and swap without having to wait a week.
Your Klaytn wallet will be usable on Kaia, but you will need to update the RPC and block explorer URLs if you are using a 3rd-party multi chain wallet such as Metamask. These will be provided at a later date. Finschia wallet holders will need to create a Kaia wallet, and a website will be provided for FNSA holders to burn their tokens and claim an equivalent value of KAIA.
Here are the main information resources about the chain merge:
You can continue building and launching your DApp on Klaytn once it is ready, DApps deployed on Klaytn will be automatically available on Kaia once it goes live. Kaia branding guidelines will be provided soon for you to update your DApp where necessary.