feat(forwarding): add hybrid forwarding mode with per-client bridge and VLAN settings

rust/src/client_registry.rs

@@ -60,6 +60,19 @@ pub struct ClientEntry {
     pub expires_at: Option<String>,
     /// Assigned VPN IP address.
     pub assigned_ip: Option<String>,
+
+    // Per-client bridge/host-IP settings
+
+    /// If true, client gets a host network IP via bridge mode.
+    pub use_host_ip: Option<bool>,
+    /// If true and use_host_ip is true, obtain IP via DHCP relay.
+    pub use_dhcp: Option<bool>,
+    /// Static LAN IP when use_host_ip is true and use_dhcp is false.
+    pub static_ip: Option<String>,
+    /// If true, assign this client to a specific 802.1Q VLAN.
+    pub force_vlan: Option<bool>,
+    /// 802.1Q VLAN ID (1-4094).
+    pub vlan_id: Option<u16>,
 }
 
 impl ClientEntry {
@@ -236,6 +249,11 @@ mod tests {
             description: None,
             expires_at: None,
             assigned_ip: None,
+            use_host_ip: None,
+            use_dhcp: None,
+            static_ip: None,
+            force_vlan: None,
+            vlan_id: None,
         }
     }