feat: add persistence for last deployment path in Nginx handler

apps/nxmesh-agent/src/service/nginx_handler/message_handler.rs

@@ -6,7 +6,7 @@ use nxmesh_proto::{
     agent_message::Payload::ConfigUpdateResult as ConfigUpdateResultPayload, command::Command,
     command_result,
 };
-use tracing::warn;
+use tracing::{info, warn};
 
 use crate::{
     config::settings::NginxSettings,
@@ -106,6 +106,9 @@ impl OnConfigUpdateHandler for NginxMasterMessageHandlerImpl {
         }
         // apply reload on the root config
         self.command_handler.reload(Some(&root_config_path)).await?;
+        // persist deployment path so Reload/Test commands survive agent restarts
+        self.fs_handler.save_last_deployment(&root_config_path).await?;
+        info!("Persisted last deployment path: {}", root_config_path);
         // Reply the master to confirm the config update is successful
         self.master_handler
             .send_message_to_master(nxmesh_proto::AgentMessage {
@@ -141,17 +144,25 @@ impl OnCommandHandler for NginxMasterMessageHandlerImpl {
             message_id: message_id.to_string(),
             payload: None,
         };
+        // load the last known deployment path for use with Reload/Test commands
+        let last_config_path = self.fs_handler.load_last_deployment().await?;
+
         let result: command_result::Result = match command {
-            // TODO: should use the previous config path
             Command::Reload(_) => {
-                let result = self.command_handler.reload(None).await;
+                let result = self
+                    .command_handler
+                    .reload(last_config_path.as_deref())
+                    .await;
                 command_result::Result::ReloadResult(nxmesh_proto::ReloadResult {
                     success: result.is_ok(),
                     error_message: result.err().map(|e| e.to_string()).unwrap_or_default(),
                 })
             }
             Command::Test(_) => {
-                let result = self.command_handler.validate(None).await;
+                let result = self
+                    .command_handler
+                    .validate(last_config_path.as_deref())
+                    .await;
                 command_result::Result::TestResult(nxmesh_proto::TestResult {
                     success: result.is_ok(),
                     error_message: result.err().map(|e| e.to_string()).unwrap_or_default(),