[Bug] Multi-line input is split by line during history recall instead of being recalled as a whole

[Prodesire]

Bug Description

When a user enters multi-line content (e.g., two lines of text with a newline) in iac-code and then exits the program, pressing the up arrow key (↑) to recall history after reopening iac-code only recalls one line at a time, instead of recalling the entire multi-line input as a single history entry.

Steps to Reproduce

1. Run iac-code
2. Enter multi-line content (e.g., two lines of text with a newline) and submit
3. Exit iac-code (Ctrl+C or normal exit)
4. Reopen iac-code
5. Press the up arrow key (↑) to recall the previous input

Expected Behavior

Pressing the up arrow key should recall the previous multi-line input as a complete history entry, restoring the full multi-line content at once.

Actual Behavior

Pressing the up arrow key only recalls the last line of the multi-line input (or recalls line by line), instead of treating the entire multi-line input as a single history entry.

Operating System

macOS

Python Version

3.12.7

iac-code Version

0.3.0

Additional Context

This issue is likely related to how newline characters are handled when saving history. Multi-line inputs may be stored line-by-line in the history file, causing them to be treated as separate entries during recall.

[guima-why]

Fixed in PR #62. Multi-line prompts are now stored and recalled as a single complete history entry instead of being split by line or replaying only the last line.

PR: #62

Verified with make translate, make format, make lint, and make test (3777 passed, 244 warnings).

Closing as completed.