Fix SSH key count: use grep -c instead of wc -l to ignore blank lines

The verify command used wc -l to count authorized SSH keys, which counts
blank lines too. Changed to grep -c '^ssh-' so only actual key lines are
counted. Also use printf in assign to avoid trailing blank lines.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: aamirrasheed

privateclaw

@@ -277,7 +277,7 @@ cmd_verify() {
 
   # -- Check 3: External Access Lockout --
   echo "[3/3] External Access Lockout"
-  KEY_COUNT=$(wc -l < "$ADMIN_HOME/.ssh/authorized_keys" 2>/dev/null | tr -d ' ')
+  KEY_COUNT=$(grep -c '^ssh-' "$ADMIN_HOME/.ssh/authorized_keys" 2>/dev/null || echo 0)
   KEY_COUNT="${KEY_COUNT:-0}"
   echo "  SSH keys:      $KEY_COUNT authorized"
   if command -v ufw &>/dev/null; then
@@ -352,7 +352,7 @@ cmd_assign() {
 
   # 1. Set SSH key (clean slate -- only user's key)
   mkdir -p /home/$ADMIN_USER/.ssh
-  echo "$SSH_KEY" > /home/$ADMIN_USER/.ssh/authorized_keys
+  printf '%s\n' "$SSH_KEY" > /home/$ADMIN_USER/.ssh/authorized_keys
   chown -R $ADMIN_USER:$ADMIN_USER /home/$ADMIN_USER/.ssh
   chmod 700 /home/$ADMIN_USER/.ssh
   chmod 600 /home/$ADMIN_USER/.ssh/authorized_keys