Closes #40322

When users run multi-line terminal commands, the confirmation dialog was
only showing the first line with '- N more lines' truncated. This meant
dangerous commands like 'rm -rf' or 'sudo' operations could be hidden
from view, creating a security risk.

Now terminal commands always display in full, with scroll support for
very long commands (20+ lines) to keep the confirmation buttons visible.

Other tools continue using truncation for better UI efficiency since
they don't pose the same security concerns.

Release Notes:

- Agent: Fixed terminal command truncation in the agent panel to better
expose long commands (e.g., potentially dangerous multi-line commands
are now fully visible before execution)

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Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: dino <dinojoaocosta@gmail.com>