Initial commit: PoE Manager modern UI rebuild

- Neues, eigenständiges Frontend (Sidebar, zentriertes Logo in der Topbar,
  Dark/Light-Theme, Karten-Dashboard, Toasts/Modals statt Bootstrap)
- Oeffentliches Kurz-Dashboard ohne Login (Status-Uebersicht)
- Browser-SSH-Terminal (paramiko, plattformunabhaengig) zum Testen von
  Switch-Zugangsdaten inkl. interaktiver Host-Key-Bestaetigung
- Granulares Rechtesystem mit Gruppen (Devices/Switches-Berechtigungen)
- Aufgeraeumtes Backend mit konfigurierbaren Pfaden, auto-generierten
  Secrets statt hart codierter Werte im Original

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

install.sh

@@ -0,0 +1,72 @@
+#!/bin/bash
+# ============================================================================
+# PoE Manager — Installer
+# Richtet System-Pakete, die Flask-App (systemd) sowie den Erreichbarkeits-
+# Check-Dienst (systemd + Timer) ein. Auszuführen als root, nachdem dieses
+# Repo z.B. nach /root/aruba-poe-modern geklont wurde.
+# ============================================================================
+set -e
+
+REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+NC='\033[0m'
+
+print_status() { echo -e "${GREEN}✔${NC} ${1} completed."; }
+step()         { echo -e "${RED}→${NC} ${1}..." | tee -a /var/log/poe-manager-install.log; }
+
+clear
+
+# ---- Pakete ----
+step "Installing system packages"
+sudo apt-get update >>/var/log/poe-manager-install.log 2>&1 && print_status "apt update"
+sudo apt-get install -y python3 python3-venv python3-pip nginx sqlite3 expect openssh-client git >>/var/log/poe-manager-install.log 2>&1 && print_status "Packages installed"
+
+# ---- App-Verzeichnis ----
+step "Deploying application to /srv/poe_manager"
+sudo mkdir -p /srv/poe_manager
+sudo rsync -a --delete --exclude 'venv' --exclude 'sqlite.db' --exclude 'fernet.key' --exclude 'secret.key' \
+    "$REPO_DIR/srv/poe_manager/" /srv/poe_manager/ >>/var/log/poe-manager-install.log 2>&1
+print_status "Application files copied"
+
+# ---- Python venv ----
+step "Setting up Python virtual environment"
+cd /srv/poe_manager
+sudo python3 -m venv venv
+sudo ./venv/bin/pip install --upgrade pip >>/var/log/poe-manager-install.log 2>&1
+sudo ./venv/bin/pip install -r requirements.txt >>/var/log/poe-manager-install.log 2>&1
+print_status "Virtual environment ready"
+
+# ---- Datenbank ----
+if [ ! -f /srv/poe_manager/sqlite.db ]; then
+    step "Initializing database"
+    sudo ./venv/bin/python3 create_db.py >>/var/log/poe-manager-install.log 2>&1
+    print_status "Database initialized"
+    echo -e "${RED}→${NC} Kein Admin-Benutzer vorhanden. Bitte danach ausführen: sudo /srv/poe_manager/venv/bin/python3 /srv/poe_manager/create_admin.py"
+fi
+
+# ---- Custom-Skripte + systemd ----
+step "Copying custom scripts and systemd units"
+sudo mkdir -p /usr/local/bin/custom
+sudo cp "$REPO_DIR/usr/local/bin/custom/poe.sh" /usr/local/bin/custom/poe.sh
+sudo chmod +x /usr/local/bin/custom/poe.sh
+sudo cp "$REPO_DIR"/etc/systemd/system/*.service /etc/systemd/system/
+sudo cp "$REPO_DIR"/etc/systemd/system/*.timer /etc/systemd/system/
+print_status "Scripts and units copied"
+
+# ---- nginx ----
+step "Configuring nginx reverse proxy"
+sudo cp "$REPO_DIR/etc/nginx/sites-available/poe_manager" /etc/nginx/sites-available/poe_manager
+sudo ln -sf /etc/nginx/sites-available/poe_manager /etc/nginx/sites-enabled/poe_manager
+sudo rm -f /etc/nginx/sites-enabled/default
+sudo nginx -t >>/var/log/poe-manager-install.log 2>&1 && sudo systemctl reload nginx
+print_status "nginx configured"
+
+# ---- Dienste aktivieren ----
+step "Enabling services"
+sudo systemctl daemon-reload
+sudo systemctl enable --now poe_web.service
+sudo systemctl enable --now rpi-check.service rpi-check-restart.timer
+print_status "Services enabled and started"
+
+echo -e "${GREEN}✔${NC} Installation abgeschlossen. Web-App erreichbar auf Port 80 (nginx) bzw. 5000 (Flask direkt)."