```python
from typing import List

def fold_ends(values: List) -> List:
    """
    Fold a list onto itself by adding the first entry to the last,
    the second to the second-last, and so on, returning the totals in that order.
    A list of an odd length leaves its middle entry as its own total.
    """
    if not values:
        return []
    
    total = 0
    result = []
    
    for i in range(len(values) // 2):
        total += values[i]
        result.append(total)
    
    if len(values) % 2 != 0:
        result.append(values[len(values) // 2])
    
    return result
```