Roland 2328524ab2 controller: VNC toggle, gated on the Desktop running ... Add a VNC toggle to the Controller (both UIs) that starts/stops whichever VNC backend is installed: wayvnc for Wayland (Raspberry Pi OS), RealVNC for X11. Runtime-only, like the Desktop toggle: the unit is never enabled, so VNC does not return after a reboot. Users who want it permanently on can enable it with raspi-config. VNC serves the desktop session, so starting it without a desktop gives clients a blank screen. The gate lives in the backend, not just the UI, so curl callers get it too (409, distinct from a systemctl failure). Stopping is never gated so a running VNC server can't be stranded on with no way to turn it off. Backend selection deliberately avoids raspi-config's live-compositor probe (pgrep labwc), which reports X11 — and would pick the wrong backend — whenever the desktop is stopped. wayvnc also requires its config to exist; that is checked directly rather than via the unit's ConditionResult, which reports 'no' for any unit that has never been started. Extracts _unit_properties()/_systemctl_unit() so Desktop and VNC share one systemd probe and start/stop path. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>		2026-07-29 18:10:05 -06:00
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index.html	controller: VNC toggle, gated on the Desktop running	2026-07-29 18:10:05 -06:00