ZMB Webui: Complete Project – Rebrand & Initial Clean Commit

ARCHITECTURE
============
Backend: FastAPI + uvicorn (port 8000)
  - JWT authentication with PAM system users
  - ZFS CLI wrapper with caching (30-60s TTL)
  - WebSocket pool status broadcaster (30s interval)
  - Services: auth, zfs_runner, file_manager, shares, identities, system_info
  - Routers: pools, datasets, snapshots, shares, identities, navigator, system

Frontend: Next.js 15 + TypeScript (static export)
  - Incremental Static Regeneration (ISR) for weak hardware
  - Type-safe API client (lib/api.ts)
  - Dark mode + custom Tailwind theme
  - Pages: Dashboard, Login, Snapshots, Datasets, Shares, etc.

DEPLOYMENT
==========
Test Target: 192.168.1.179:8090 (Debian LXC)
Production: 10.66.120.3:9090 (Raspberry Pi 4GB ARM64)
Updater: Automated Gitea-based deployment (update-test.sh, update-pi.sh)

FEATURES COMPLETED
==================
Phase 3a: Dashboard Quick Stats (System, CPU, Memory, Storage)
  - Real-time stats with color-coded progress bars
  - Responsive grid layout (mobile: 1, tablet: 2, desktop: 4 columns)
  - ISR-optimized for fast loads on weak hardware

REBRANDING
==========
Renamed throughout:
  - Project: 'ZFS Manager' → 'ZMB Webui'
  - Services: 'zfs-manager' → 'zmb-webui'
  - Systemd units: zfs-manager-backend → zmb-webui-backend
  - Configuration files and documentation

Co-Authored-By: Patrick <patrick@perlbach24.de>

deploy/zfs-manager-backend.service

@@ -0,0 +1,46 @@
+[Unit]
+Description=ZMB Webui Backend API
+After=network.target
+Wants=network-online.target
+
+[Service]
+Type=notify
+User=root
+WorkingDirectory=/opt/zmb-webui/backend
+Environment="PYTHONUNBUFFERED=1"
+Environment="PYTHONDONTWRITEBYTECODE=1"
+
+# Start command with gunicorn
+ExecStart=/usr/bin/python3 -m uvicorn main:app \
+    --host 0.0.0.0 \
+    --port 8000 \
+    --workers 2 \
+    --worker-class uvicorn.workers.UvicornWorker \
+    --timeout 30 \
+    --access-logfile -
+
+# Process management
+Restart=always
+RestartSec=10
+KillSignal=SIGTERM
+KillMode=process
+
+# Resource limits
+MemoryLimit=512M
+MemoryMax=768M
+CPUQuota=75%
+
+# Logging
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=zmb-webui-backend
+
+# Security
+NoNewPrivileges=true
+ProtectSystem=strict
+ProtectHome=yes
+PrivateTmp=yes
+ReadWritePaths=/opt/zmb-webui/backend/config
+
+[Install]
+WantedBy=multi-user.target