How to Calculate Space for PDA Accounts with Dynamic Vectors in Solana?

I am working on a NFT staking program. I need to create a PDA account with a structure that includes a dynamic Vec.

Here's the structure:

#[account]pub struct UserNftStakeAccount {    pub user: Pubkey,                       pub nft_staked_mints: Vec<Pubkey>,      pub stake_start_time: i64,              pub reward_accumulated: u64,            pub reward_claimed: u64,                pub last_reward_calculation_time: i64, }#[derive(Accounts)]pub struct NFTStake<'info> {    #[account(        init_if_needed,        payer = user,        space = 8 + std::mem::size_of::<UserNftStakeAccount>(),        seeds = [b"nft_stake", user.key().as_ref()],        bump,    )]     .     .     .}

The nft_staked_mints field is a Vec, and the number of NFTs a user can stake is dynamic. I’m unsure how to calculate the required space for this PDA account since the vector's length is unknown during initialization.

• How can I allocate sufficient space for this account without knowing the vector's length beforehand?

• Are there any best practices for handling PDA accounts with dynamic data like vectors to avoid over-allocation or under-allocation of space?

• Is there a way to resize or dynamically manage account space after initialization in Solana, or should I design the program to predefine maximum limits for vectors?