Pi OS Bookworm + Debian bookworm both ship libgtk-4 4.8.3. No code in
the kiosk uses 4.12+ APIs (compute_bounds, WidgetPaintable, Picture,
add_tick_callback, Fixed, set_content_fit are all <= 4.8). Swap
gtk4 feature v4_12 → v4_8 and drop the bookworm-backports juggling
in CI.
Kiosk now exposes :18090 with two surfaces:
- GET /local/layout/:id?key=<kiosk_local_key>
Bookmark-friendly layout switch on this kiosk. Auth = kiosk-generated
local key (32 random bytes, hex, stored at <state_dir>/local.key).
- ANY /proxy/* — forwards to BF server with the request's Authorization
header preserved. Lets LAN clients reach a cloud-hosted BF server via
the kiosk's local socket; kiosk adds no auth of its own.
Heartbeat reports {local_key, local_port}; kiosks table grows
local_key/local_port/local_last_ip columns. Admin kiosk edit page now
shows the local URLs as a copy-paste block.
Override port: BF_KIOSK_LOCAL_PORT. Disable: BF_KIOSK_LOCAL_DISABLE=1.
Multi-display:
- Bundle ships displays[] each with own layouts + idle/sleep
- Rust kiosk creates one ApplicationWindow per gdk monitor
- Per-display state (layout, idle, sleep) via HashMap
- WARM_CAMERAS pool shared across displays
- Backward-compat top-level display/layouts still emitted
System Health (/admin/health):
- Online status, CPU temp (color-coded), fan RPM/PWM
- Bundle version mismatch detection
- 30s auto-refresh
Camera snapshot/test:
- shared/snapshot.ts: ffmpeg/gst-launch fallback, 5s timeout
- /admin/entities/:id/snapshot returns JPEG
- EntityEditPage shows live preview with Refresh
GPIO (Pi buttons/sensors):
- kiosk_gpio_bindings table + CRUD admin UI
- Bundle ships gpio_bindings[]
- kiosk/src/gpio.rs with gpiod crate, worker thread per pin
- Edge events POST to /api/kiosk/event with source_type=gpio
Layout switch fixes:
- GET aliases added so direct URL hits work
- New /admin/displays/:displayId/layout/:layoutId for multi-display
- DisplayEditPage gets "Switch Layout Now" section
Node-RED embed:
- /admin/nodered renders iframe at /nrdp/
- Sandbox attrs allow scripts/forms/popups
- Sidebar link now opens embedded view
Rust kiosk:
- web cells now use webkit6 WebView (load_uri)
- html cells use WebView.load_html (full HTML rendering)
- query_displays() reads /sys/class/drm/ for connected HDMI/DP outputs
- Heartbeat reports display geometry every 60s
Server:
- /api/kiosk/heartbeat accepts displays array
- Syncs kiosk-reported displays to display records
- Updates dimensions when changed, creates new displays for new ports
Server side:
- service-coordinator-ws: full WS implementation using ws package
- Auth via ?token=<kiosk_key> query param
- Coordinator registry for cross-plugin notification
- Admin mutations call notifyKiosks() → server pushes reload-bundle
- 30s ping/pong heartbeat
Kiosk side:
- Rust ws_client with tokio runtime + tokio-tungstenite
- Auto-reconnect with exponential backoff (1s → 60s cap)
- On reload-bundle: re-fetches bundle, re-renders layout
- Pong replies to server pings
Also fix: auto-suffix kiosk name on UNIQUE collision (re-pair with
same hostname no longer fails).
