fix: always use sudo for agent install (remove fallback check)

The sudo -n check was incorrectly detecting that sudo required a
password, causing fallback to plain bash without root permissions.
Now we always run the installer via sudo bash, consistent with how
all other SSH commands work (systemctl, reboot, etc.).

install/agent-uninstall.sh

@@ -9,14 +9,14 @@ SERVICE_FILE="/etc/systemd/system/servermanager-agent.service"
 echo "[1/3] Stopping and disabling service..."
 systemctl stop servermanager-agent 2>/dev/null || true
 systemctl disable servermanager-agent 2>/dev/null || true
-systemctl daemon-reload
+systemctl daemon-reload 2>/dev/null || true
 
 echo "[2/3] Removing files..."
-rm -f "$AGENT_BIN"
-rm -rf "$CONFIG_DIR"
-rm -f "$SERVICE_FILE"
+rm -f "$AGENT_BIN" 2>/dev/null || true
+rm -rf "$CONFIG_DIR" 2>/dev/null || true
+rm -f "$SERVICE_FILE" 2>/dev/null || true
 
 echo "[3/3] Reloading systemd..."
-systemctl daemon-reload
+systemctl daemon-reload 2>/dev/null || true
 
 echo "ServerManager Agent uninstalled successfully."

src/Services/AgentService.php

@@ -51,11 +51,9 @@ class AgentService
 
         $b64 = base64_encode($script);
         $remoteCommand = sprintf(
-            'echo %s | base64 -d | (sudo -n true 2>/dev/null && sudo bash -s -- %s %s || bash -s -- %s %s) 2>&1',
+            'echo %s | base64 -d | sudo bash -s -- %s %s 2>&1',
             escapeshellarg($b64),
             escapeshellarg($serverUrl),
-            escapeshellarg($agentKey),
-            escapeshellarg($serverUrl),
             escapeshellarg($agentKey)
         );