[RaphaelFakhri]

Summary

summarize_args builds the rows of the confirm_write approval card. A top-level object renders as compact JSON, and a top-level boolean renders as Yes or No. Items inside a list skip those rules and go through str(), so the card shows Python's repr instead:

• A list of objects, such as the pages argument of a Notion page creation or the links of a Linear issue, renders as {'title': 'Q3 plan'}, {'title': 'Q4 plan'}.
• A list of booleans renders as True, False.

The approver reads these rows to decide whether to allow the write, so the card should present a list item the same way it presents the same value on its own.

Change

• _stringify formats each list or tuple item with _stringify instead of str(). Strings, numbers, and flat lists render exactly as before.
• New test test_summarize_args_renders_list_items_like_top_level_values covers a list of objects and a list of booleans.

Testing

From agent/:

• uv run pytest -q tests/test_write_confirmation.py: 53 passed. With only the source change reverted, the new test fails (1 failed, 52 passed) with "{'title': 'Q3 plan'}, {'title': 'Q4 plan'}".
• uv run pytest -q: 853 passed, 1 skipped.

Fixes #90