Change "Destroyed" message to be clearer

When destroying, Local Server asks:
```
Do you want to remove the shared proxy container too?
Warning: Only do this if you have no other instances of Local Server. [y/N]
```

Even if you select "no", the next message is:
```
Destroyed.
```

This is actually saying that the main container is destroyed, but it gives me a mini heart attack every time I see it, so we should really clarify this.

No file or test is named. Start by locating the Local Server destroy flow and the output after the shared proxy prompt; update the message so it clearly identifies what was destroyed, then verify the wording for both responses to the prompt.

Written by the indexing model from the issue text.