Drive-qualify resolved paths in fixtures and assert against normalized cwds
so route tests match the values normalizeRequestCwd produces. Skip the
POSIX-shell TerminalService suite on native Windows, where the terminal
feature is unsupported.
Sessions outside the server's launch directory were invisible and returned
404 on open, leaving the model picker empty. List without the SDK's
process-cwd filter and normalize working directories at the API boundary and
when reading stored session data, tolerating separator/normalization
differences (including Windows backslash vs forward slash). Requires Pi
coding agent SDK 0.78.0 or newer.