Client peer menu uses substring matching — targets wrong user

## Bug Description

```python
if m["name"] in line:
```

If users "Al" and "Alice" are both online and you right-click "Alice", `"Al" in "    Alice"` is `True`. If "Al" comes first in the member list, your DM or report goes to "Al" instead of "Alice".

## File & Lines

`client code 2.py` — lines 458–460

## Severity

Functional bug — DMs and reports can be sent to the wrong user.