v3.9.0 — dashboard reopen + cross-platform

v3.9.0 — open the Token Monitor when you want, on every OS

The dashboard opens once on a fresh install so you see it works, then it's on-demand — nothing is forced to stay open (only the capture proxy is always-on).

Re-open it any way you like

• simplicio-loop dashboard — works from anywhere after pip install (no repo path). --stop to close, --no-browser to start the server only, --port to pick the port.
• bash scripts/simplicio-economy.sh monitor (repo checkout).
• just ask the agent — "open the token dashboard".

First-run open is marker-guarded (~/.simplicio/.dashboard_shown) so a re-install/update never reopens it. Opt out with SIMPLICIO_NO_DASHBOARD=1 (or SIMPLICIO_NO_BROWSER=1).

Cross-platform — macOS · Windows · Linux (adversarially reviewed)

• Windows: the dashboard PID file no longer hardcodes /tmp (which doesn't exist on Windows and crashed the server) → tempfile.gettempdir() in both the CLI and the dashboard, with a defensive write. --stop works on all three OS.
• Headless Linux/CI: webbrowser.open() is only called when a GUI exists (DISPLAY/WAYLAND_DISPLAY, or macOS/Windows) — a headless box would otherwise launch a text browser that inherits stdin and hangs the install forever. Install never blocks now.
• Hardened sys.executable or "python3" so a None interpreter can't crash the launcher.

Fixed

• simplicio-loop --version now reads the real version from package metadata (was stuck at 1.0.3).

Full diff: v3.8.0...v3.9.0