When platform_toolsets[<platform>] contains both a composite (e.g.
hermes-cli) and at least one configurable opt-in (e.g. spotify), the
has_explicit_config branch in _get_platform_tools silently dropped the
composite, leaving sessions with only the configurable + plugin tools
and no native tools (terminal, file, web, browser, memory, etc.).
Mirror the else-branch's subset inference for composites that sit
alongside the configurables, but apply _DEFAULT_OFF_TOOLSETS only to the
implicit expansion so user-listed default-off toolsets (spotify,
discord) survive.
JackJin
7d276bfbee