The hub was dead links (clicking Foundry 404'd — its server wasn't running).
Now it's a real control center, with one shared registry driving both faces.

- launchers.py: allow-listed registry. Web tools (Foundry/Armada) = start-or-open
  via port-check (spawn the server if down, then open); native apps
  (Pulsar/Ardour/qjackctl) launch detached with running + availability state.
  Wayland has no portable focus → running apps report 'already-running'.
- midimon.py: 'aseqdump | tr' done right — parses each event, renders aligned &
  colourised with note names (C4) and velocity bars. parse_line is pure/tested.
- Bridge UI: hub shows live running dots; start-or-open opens a blank tab within
  the click gesture then navigates once the server binds (no popup block).
- perf-tray: 'Open Bridge' + 'Launch ▸' submenu off the SAME launchers.py — the
  tray is now the unified ParVagues tray (DRY with the web hub).
- 17 tests (launcher registry/state + MIDI parser). Verified: Foundry card boots
  the server → :8765 200.