fix: parse both parts[3] and parts[4] in _get_listening_ports() for ss output

Agent-Logs-Url: https://github.com/naturallaw777/staging_alpha/sessions/380a4877-aaea-47ea-8998-4c60ff6d49d2

Co-authored-by: naturallaw777 <99053422+naturallaw777@users.noreply.github.com>

app/sovran_systemsos_web/server.py

@@ -760,12 +760,16 @@ def _get_listening_ports() -> dict[str, set[int]]:
                 capture_output=True, text=True, timeout=10,
             )
             for line in proc.stdout.splitlines():
-                # Column 4 is the local address:port (e.g. "0.0.0.0:443" or "[::]:443")
+                # The local address:port column varies by ss output format:
+                # - "0.0.0.0:PORT" style lines have extra spacing that puts the
+                #   local address at index 4 (zero-based).
+                # - "*:PORT" style lines (dual-stack/wildcard, used by Caddy)
+                #   have the local address at index 3, with the peer at index 4.
+                # Try both columns so neither format is silently skipped.
                 parts = line.split()
                 if len(parts) < 5:
                     continue
-                addr = parts[4]
-                # strip IPv6 brackets and extract port after last ":"
+                for addr in (parts[3], parts[4]):
                     port_str = addr.rsplit(":", 1)[-1]
                     try:
                         result[proto].add(int(port_str))