```python
def match_setting(rules: dict, name: str) -> str | None:
    if not isinstance(name, str) or name == "" or "*" in name:
        raise ValueError("name must be a star-free non-empty string")

    exact_match = rules.get(name)
    if exact_match is not None:
        return exact_match

    longest_wildcard = None
    max_length = -1

    for selector, value in rules.items():
        if selector == "*":
            continue
        if selector.endswith(".*"):
            prefix = selector[:-2]
            if name.startswith(prefix) and len(prefix) > max_length:
                longest_wildcard = value
                max_length = len(prefix)

    return longest_wildcard
```