berth v0.1.11

Which berth is this? Every surface people read now says, and a dashboard left running across an upgrade asks to be restarted.

Added

• berth names its version where people read its output: the dashboard header (ui :10000 · v0.1.11), the first line of berth check (berth 0.1.11 · 33 ports · …), and the session-start block (## Ports (berth 0.1.11)). A dashboard or session left running across an upgrade now shows the version it is actually running. Machine-read output (env, --json, which already carried version) is unchanged.
• The dashboard notices when a newer berth is installed than the one serving it, whether npm replaced it in place or a newer Claude Code plugin version sits beside it in the plugin cache, and the header says 0.1.12 installed, restart berth ui. /api/state carries it as runtime.installed; the check reads berth's own package.json files, at most once a minute.