Rounding up asset values on bridge and send pages causes a mismatch in actual balance

[VolodLytvynenko]

better to take into work after merging #21595

Preconditions:

The user owns an asset with a balance rounded up for display purposes.
Example: The user's balance is 1.059 USDC, but the app shows 1.06 USDC as the maximum value.

actual value

Steps to Reproduce:

1. Navigate to the Bridge or Send setup page.
2. Attempt to use the displayed max value (e.g., 1.06 USDC).

Actual Result:

The user believes they have 1.06 USDC due to rounding up and attempts to use this amount.
This causes a mismatch and shows ugly error

Expected Result:

The maximum value displayed should be rounded down to the nearest usable precision (e.g., 1.05 USDC).
This ensures the user cannot enter a value exceeding their actual balance, avoiding transaction failures.

[VolodLytvynenko]

duplicate of #21389