launcher: two Windows-only failures (server delete, a test's line ends)

- Deleting a stopped server always failed on Windows ("Access is denied"): the folder was
  moved while its lock file was open. The lock is released just before the move there; a
  supervisor starting in between holds it again and the move fails, so a live server stays.
- mojang_downloads_only_for_an_owner searched source text for "\n", which a Windows
  checkout writes as CRLF.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

launcher/src/backend.rs

@@ -2906,7 +2906,8 @@ mod tests {
                 let name = path.file_name().unwrap().to_string_lossy().to_string();
                 let in_tests = name.contains("tests") || path.parent().unwrap() != src;
                 // The code alone: test modules (this one included) come after it.
-                let mut text = fs::read_to_string(&path).unwrap();
+                // A Windows checkout has CRLF line ends: the searches below look for "\n".
+                let mut text = fs::read_to_string(&path).unwrap().replace("\r\n", "\n");
                 text.truncate(text.find("#[cfg(test)]").unwrap_or(text.len()));
                 sources.push((name, in_tests, text));
             }

launcher/src/servers.rs

@@ -107,6 +107,11 @@ fn trash_stopped_server(
         .map_err(|e| e.to_string())?;
     lock.try_lock()
         .map_err(|_| "Stop the server before deleting it.".to_string())?;
+    // Windows can't move a folder while a file in it is open, the lock included: let it go
+    // first. Still safe: a supervisor starting in between opens the lock again, and then the
+    // move fails instead of taking a live server.
+    #[cfg(windows)]
+    drop(lock);
     trash(dir).map_err(|e| format!("Could not move the server to the trash: {e}"))
 }