Refactor: Simplify module structure and reorganize services

- Removed system/ directory, merged applications into users/geir.nix
- Simplified fonts.nix to bare minimum (users can add more)
- Moved transmission.nix to sleeper-service/services/ (machine-specific)
- Organized grey-area services into services/ directory
- Updated import paths and tested all configurations
- Added research documentation for deploy-rs and GNU Stow

packages/README.md

@@ -104,16 +104,148 @@ final: prev: {
 
 ## Home-lab Specific Packages
 
+### Lab Tool (`lab`) - Evolution Roadmap
+The `lab` tool is the central infrastructure management utility with planned major enhancements:
+
+**Current Implementation (Shell-based):**
+- Multi-machine deployment via SSH/rsync
+- Infrastructure status monitoring  
+- Color-coded logging and error handling
+- Machine health checks and connectivity testing
+
+**Phase 1: deploy-rs Integration**
+Research completed - deploy-rs provides production-grade deployment capabilities:
+- **Automatic rollback**: Failed deployments revert automatically
+- **Parallel deployment**: Deploy to multiple machines simultaneously  
+- **Health checks**: Validates deployments before committing
+- **Atomic operations**: Either succeeds completely or fails cleanly
+- **Flake-native**: Built specifically for NixOS flakes
+
+Implementation approach:
+```bash
+# Hybrid command structure
+lab deploy sleeper-service        # Current SSH/rsync method
+lab deploy-rs sleeper-service     # New deploy-rs backend
+lab deploy-all --parallel         # Parallel deployment via deploy-rs
+```
+
+Configuration integration:
+```nix
+# flake.nix additions
+inputs.deploy-rs.url = "github:serokell/deploy-rs";
+
+deploy.nodes = {
+  sleeper-service = {
+    hostname = "sleeper-service.tail807ea.ts.net";
+    profiles.system = {
+      user = "root";
+      path = deploy-rs.lib.x86_64-linux.activate.nixos 
+        self.nixosConfigurations.sleeper-service;
+      sshUser = "sma";
+      autoRollback = true;
+      magicRollback = true;
+      activationTimeout = 180;
+    };
+  };
+};
+```
+
+**Phase 2: Enhanced Statistics Engine**
+Current `lab status` provides basic connectivity - planned expansion to comprehensive monitoring:
+
+**Rust/Go Implementation for Performance:**
+- **System metrics**: CPU, memory, disk usage, network stats
+- **Service monitoring**: systemd service status, failed units
+- **ZFS statistics**: Pool health, scrub status, capacity usage
+- **Network topology**: Tailscale mesh status, latency metrics
+- **Historical data**: Trend analysis and performance tracking
+
+**Example enhanced output:**
+```bash
+$ lab status --detailed
+Infrastructure Status (Updated: 2024-01-20 15:30:42)
+
+━━━ congenital-optimist (local) ━━━
+✅ Online │ Load: 1.2 │ RAM: 8.4GB/32GB │ Disk: 45% │ Uptime: 7d 2h
+🔗 Tailscale: Active (100.81.15.84) │ Latency: local
+
+━━━ sleeper-service (file server) ━━━  
+✅ Online │ Load: 0.3 │ RAM: 2.1GB/8GB │ Disk: 67% │ Uptime: 12d 8h
+🗄️  ZFS: ONLINE │ Pool: storage (1.8TB, 50% used) │ Last scrub: 3d ago
+🔗 Tailscale: Active (100.81.15.85) │ Latency: 2ms
+📡 Services: sshd ✅ │ nfs-server ✅ │ zfs-mount ✅
+
+━━━ grey-area (unreachable) ━━━
+⚠️  Offline │ Last seen: 2h ago │ SSH: Connection refused
+```
+
+**Phase 3: GNU Stow Dotfile Integration**
+Research completed - GNU Stow provides excellent dotfile management for server configurations:
+
+**Use cases:**
+- **Server user configs**: Simple dotfiles for `sma` user on servers
+- **Machine-specific configs**: Different configurations per server role
+- **Selective deployment**: Deploy only needed configs per machine
+
+**Integration approach:**
+```bash
+# Enhanced lab tool commands
+lab dotfiles deploy sma@sleeper-service    # Deploy server user configs
+lab dotfiles status                         # Show dotfile deployment status
+lab dotfiles sync --machine sleeper-service # Sync specific machine configs
+```
+
+**Directory structure:**
+```
+packages/dotfiles/
+├── server-common/          # Shared server configurations
+│   ├── .zshrc             # Basic shell config
+│   ├── .vimrc             # Editor config  
+│   └── .gitconfig         # Git configuration
+├── sleeper-service/        # NFS server specific
+│   └── .config/
+│       └── nfs/
+├── grey-area/             # Git server specific  
+│   └── .gitconfig         # Enhanced git config
+└── stow-deploy.nix        # NixOS integration
+```
+
+**Hybrid Configuration Strategy:**
+- **Keep org-mode** for complex desktop configurations (geir user)
+- **Use GNU Stow** for simple server configurations (sma user)
+- **Machine-specific packages** for role-based configurations
+
+**Phase 4: Advanced Features**
+- **Configuration drift detection**: Compare deployed vs expected state
+- **Automated health checks**: Scheduled infrastructure validation
+- **Integration APIs**: Metrics export for monitoring systems
+- **Web dashboard**: Optional web interface for infrastructure overview
+- **Alert system**: Notifications for infrastructure issues
+
+**Implementation Timeline:**
+1. **Q1 2024**: deploy-rs integration and testing
+2. **Q2 2024**: Enhanced statistics engine in Rust/Go
+3. **Q3 2024**: GNU Stow dotfile integration
+4. **Q4 2024**: Advanced monitoring and alerting features
+
 ### CongenitalOptimist Packages
 - Development environment customizations
 - Workstation-specific tools
 - Desktop application modifications
+- `lab` tool and deployment utilities
 
 ### sleeper-service Packages
 - File server utilities
-- Monitoring tools
-- Backup scripts
-- Network service tools
+- ZFS monitoring tools
+- NFS service management
+- Storage health monitoring
+- Backup automation scripts
+
+### Server Infrastructure Packages
+- **deploy-rs configurations**: Declarative deployment definitions
+- **Dotfile managers**: GNU Stow packages for server user configurations
+- **Monitoring utilities**: System health and performance tools
+- **Network tools**: Tailscale integration and network diagnostics
 
 ## Best Practices