post_check: radio present but not beaconing (no ssid) is a warning, not ok

Adds classify_radio + hidden --classify-radio seam and check 13.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KqhjP7nud5gdBg25zCiRk9

tests/check-templates.sh

@@ -193,4 +193,13 @@ for row in "active success 0:ok" "inactive success 0:finished" "failed exit-code
     if [ "$got" = "$want" ]; then ok "--classify-unit $args -> $want"; else bad "--classify-unit $args gave '$got', want '$want'"; fi
 done
 
+# 13. radio beaconing classification used by post_check (present but no ssid = not beaconing)
+r_ok=$'Interface wlan1\n\tifindex 5\n\ttype AP\n\tssid VanLink2\n\tchannel 149 (5745 MHz), width: 80 MHz, center1: 5775 MHz'
+r_bad=$'Interface wlxd8ec5e2faa8c\n\tifindex 6\n\twdev 0x100000001\n\taddr d8:ec:5e:2f:aa:8c\n\ttype AP\n\twiphy 39\n\ttxpower 30.00 dBm'
+for row in "beaconing:$r_ok" "silent:$r_bad" "silent:"; do
+    want=${row%%:*}; inp=${row#*:}
+    got=$(printf '%s\n' "$inp" | ./deploy.sh --classify-radio 2>&1) || true
+    if [ "$got" = "$want" ]; then ok "--classify-radio -> $want"; else bad "--classify-radio gave '$got', want '$want'"; fi
+done
+
 exit "$fail"