Initial commit: epaper-dashboard for 7.3" ACeP 7-Color display

- dashboard.py: plugin-based renderer with 4x4 grid layout
- admin.py: web UI with layout editor + plugin configs
- layout.py: pack algorithm, item placement, grid system
- plugins/: clock, weather, system, spotify, strava, gmail, minimax, hello
- network_watchdog.py: WiFi AP/client mode management
- waveshare_epd_init.py: vendor driver stub

start_admin.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+# startet admin.py im Hintergrund mit korrektem CWD
+cd /home/koptikp/epaper-dashboard/port
+pkill -f admin.py 2>/dev/null
+sleep 1
+nohup env EPAPER_ADMIN_PORT=8080 python3 admin.py > /tmp/admin.log 2>&1 &
+echo "admin pid: $!"