Initial implementation: Bordanlage boat onboard system

Complete multiroom audio + navigation dashboard:
- Docker stack: SignalK, Snapcast (4 zones), librespot, shairport-sync, Mopidy, Jellyfin, Portainer
- React 18 + Vite dashboard with nautical dark theme
- Full mock system (SignalK NMEA simulation, Snapcast zones, Mopidy player)
- Real API clients for all services with reconnect logic
- SVG instruments: Compass, WindRose, Gauge, DepthSounder, SpeedLog
- Pages: Overview, Navigation, Audio (zones/radio/library), Systems
- Dev mode runs fully without hardware (make dev)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bordanlage/scripts/init-pipes.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -e
+
+PIPE_DIR="${PIPE_DIR:-/tmp/audio}"
+mkdir -p "$PIPE_DIR"
+
+for pipe in spotify.pcm airplay.pcm mopidy.pcm; do
+  path="$PIPE_DIR/$pipe"
+  if [ ! -p "$path" ]; then
+    mkfifo "$path"
+    echo "Created pipe: $path"
+  else
+    echo "Pipe already exists: $path"
+  fi
+done
+
+echo "All audio pipes ready."