Mobile tool rows showed the raw input JSON (`{"file_path":…}`) as the row
label, and the expanded detail just repeated that same truncated string.
- `describeToolInput` labels a row with the target file path, else the
primary argument (command/cmd/query/pattern/url/description), else the
bounded JSON preview.
- Codex delivers tool arguments as a JSON string; normalize those into the
object shape the helpers already understand, so labels, file links,
run summaries and the expanded detail all work for Codex calls too.
- The expanded detail now renders the fully formatted input, capped at
MAX_TOOL_RESULT_CHARS like desktop's tool detail (and like the result
body), and a structured input makes the row expandable.
Brennan Benson
0a38ecc59f