[BUG] Sending Max Amount of FLOW Leaves 0.002 FLOW Remaining

[Peppermint1020]

Description
When sending the maximum amount of FLOW tokens, the system leaves 0.002 FLOW remaining in the wallet instead of only retaining the minimum required amount (e.g., 0.001 FLOW for storage). This discrepancy might confuse users and leads to incorrect calculations when attempting to send the maximum balance.
https://github.com/user-attachments/assets/54c79bec-d1bd-40fa-be77-afb7a721ebc8

Steps to Reproduce
(1)Open the wallet and ensure the balance has sufficient FLOW tokens.
(2)Attempt to send/move the maximum amount of FLOW tokens using the " Max" option.
(3)Confirm the transaction.
(4)Check the remaining balance in the wallet after the transaction.
Expected Behavior
The system should only retain the required minimum balance for storage, which is 0.001 FLOW (or the exact storage requirement).

Actual Behavior
The system leaves 0.002 FLOW remaining in the wallet, exceeding the required minimum.

Environment
Platform: iOS 2.2.11(7)