Add Tailscale network support for host connections

Implement configurable network routing for both local and Tailscale networks.
Dashboard now supports intelligent connection selection with automatic fallback
between network types. Add IP configuration fields and connection routing logic
for ZMQ and SSH operations.

Features:
- Host configuration with local and Tailscale IP addresses
- Configurable connection types (local/tailscale/auto)
- Automatic fallback between network connections
- Updated ZMQ connection logic with retry support
- SSH command routing through configured IP addresses

dashboard/src/ui/mod.rs

@@ -251,12 +251,14 @@ impl TuiApp {
                 KeyCode::Char('r') => {
                     // System rebuild command - works on any panel for current host
                     if let Some(hostname) = self.current_host.clone() {
+                        let connection_ip = self.get_connection_ip(&hostname);
                         // Create command that shows logo, rebuilds, and waits for user input
                         let logo_and_rebuild = format!(
-                            "bash -c 'cat << \"EOF\"\nNixOS System Rebuild\nTarget: {}\n\nEOF\nssh -tt {}@{} \"bash -ic {}\"\necho\necho \"========================================\"\necho \"Rebuild completed. Press any key to close...\"\necho \"========================================\"\nread -n 1 -s\nexit'",
+                            "bash -c 'cat << \"EOF\"\nNixOS System Rebuild\nTarget: {} ({})\n\nEOF\nssh -tt {}@{} \"bash -ic {}\"\necho\necho \"========================================\"\necho \"Rebuild completed. Press any key to close...\"\necho \"========================================\"\nread -n 1 -s\nexit'",
                             hostname,
+                            connection_ip,
                             self.config.ssh.rebuild_user,
-                            hostname,
+                            connection_ip,
                             self.config.ssh.rebuild_alias
                         );
                         
@@ -289,10 +291,11 @@ impl TuiApp {
                 KeyCode::Char('J') => {
                     // Show service logs via journalctl in tmux split window
                     if let (Some(service_name), Some(hostname)) = (self.get_selected_service(), self.current_host.clone()) {
+                        let connection_ip = self.get_connection_ip(&hostname);
                         let journalctl_command = format!(
                             "bash -c \"ssh -tt {}@{} 'sudo journalctl -u {}.service -f --no-pager -n 50'; exit\"",
                             self.config.ssh.rebuild_user,
-                            hostname,
+                            connection_ip,
                             service_name
                         );
                         
@@ -312,10 +315,11 @@ impl TuiApp {
                         // Check if this service has a custom log file configured
                         if let Some(host_logs) = self.config.service_logs.get(&hostname) {
                             if let Some(log_config) = host_logs.iter().find(|config| config.service_name == service_name) {
+                                let connection_ip = self.get_connection_ip(&hostname);
                                 let tail_command = format!(
                                     "bash -c \"ssh -tt {}@{} 'sudo tail -n 50 -f {}'; exit\"",
                                     self.config.ssh.rebuild_user,
-                                    hostname,
+                                    connection_ip,
                                     log_config.log_file_path
                                 );
                                 
@@ -368,10 +372,11 @@ impl TuiApp {
                 KeyCode::Char('t') => {
                     // Open SSH terminal session in tmux window
                     if let Some(hostname) = self.current_host.clone() {
+                        let connection_ip = self.get_connection_ip(&hostname);
                         let ssh_command = format!(
                             "ssh -tt {}@{}",
                             self.config.ssh.rebuild_user,
-                            hostname
+                            connection_ip
                         );
                         
                         std::process::Command::new("tmux")
@@ -917,6 +922,15 @@ impl TuiApp {
     }
 
     /// Parse MAC address string (e.g., "AA:BB:CC:DD:EE:FF") to [u8; 6]
+    /// Get the connection IP for a hostname based on host configuration
+    fn get_connection_ip(&self, hostname: &str) -> String {
+        if let Some(host_details) = self.config.hosts.get(hostname) {
+            host_details.get_connection_ip(hostname)
+        } else {
+            hostname.to_string()
+        }
+    }
+
     fn parse_mac_address(mac_str: &str) -> Result<[u8; 6], &'static str> {
         let parts: Vec<&str> = mac_str.split(':').collect();
         if parts.len() != 6 {