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>

backend/manage_users.py

@@ -0,0 +1,129 @@
+#!/usr/bin/env python3
+"""
+User management CLI tool for ZMB Webui
+Usage:
+  python manage_users.py add <username> [password]
+  python manage_users.py list
+  python manage_users.py delete <username>
+  python manage_users.py change-password <username> [password]
+"""
+
+import sys
+import getpass
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).parent))
+
+from services.auth import auth_service
+
+
+def add_user(username: str, password: str = None):
+    """Add new user"""
+    if not password:
+        password = getpass.getpass(f"Enter password for {username}: ")
+        confirm = getpass.getpass("Confirm password: ")
+        if password != confirm:
+            print("ERROR: Passwords don't match")
+            return False
+
+    try:
+        auth_service.add_user(username, password)
+        print(f"✓ User '{username}' created successfully")
+        return True
+    except Exception as e:
+        print(f"ERROR: {e}")
+        return False
+
+
+def list_users():
+    """List all users"""
+    if not auth_service.users:
+        print("No users found")
+        return True
+
+    print("Users:")
+    print("-" * 40)
+    for username, user_data in auth_service.users.items():
+        disabled = " (disabled)" if user_data.get("disabled") else ""
+        print(f"  {username}{disabled}")
+    print("-" * 40)
+    return True
+
+
+def delete_user(username: str):
+    """Delete user"""
+    if username not in auth_service.users:
+        print(f"ERROR: User '{username}' not found")
+        return False
+
+    confirm = input(f"Are you sure you want to delete '{username}'? (y/N): ")
+    if confirm.lower() != 'y':
+        print("Cancelled")
+        return False
+
+    del auth_service.users[username]
+    auth_service._save_users()
+    print(f"✓ User '{username}' deleted")
+    return True
+
+
+def change_password(username: str, password: str = None):
+    """Change user password"""
+    if username not in auth_service.users:
+        print(f"ERROR: User '{username}' not found")
+        return False
+
+    if not password:
+        password = getpass.getpass(f"Enter new password for {username}: ")
+        confirm = getpass.getpass("Confirm password: ")
+        if password != confirm:
+            print("ERROR: Passwords don't match")
+            return False
+
+    auth_service.users[username]["hashed_password"] = auth_service.get_password_hash(password)
+    auth_service._save_users()
+    print(f"✓ Password changed for '{username}'")
+    return True
+
+
+def main():
+    if len(sys.argv) < 2:
+        print(__doc__)
+        return 1
+
+    command = sys.argv[1]
+
+    if command == "add":
+        if len(sys.argv) < 3:
+            print("Usage: manage_users.py add <username> [password]")
+            return 1
+        username = sys.argv[2]
+        password = sys.argv[3] if len(sys.argv) > 3 else None
+        return 0 if add_user(username, password) else 1
+
+    elif command == "list":
+        return 0 if list_users() else 1
+
+    elif command == "delete":
+        if len(sys.argv) < 3:
+            print("Usage: manage_users.py delete <username>")
+            return 1
+        username = sys.argv[2]
+        return 0 if delete_user(username) else 1
+
+    elif command == "change-password":
+        if len(sys.argv) < 3:
+            print("Usage: manage_users.py change-password <username> [password]")
+            return 1
+        username = sys.argv[2]
+        password = sys.argv[3] if len(sys.argv) > 3 else None
+        return 0 if change_password(username, password) else 1
+
+    else:
+        print(f"ERROR: Unknown command '{command}'")
+        print(__doc__)
+        return 1
+
+
+if __name__ == "__main__":
+    sys.exit(main())