fix(reliability): supervisor re-parks stock-resurrected dummy STA on interval

payload/user/remote_access/pager-webui/server.py

@@ -4719,6 +4719,7 @@ def _mem_percent(path='/proc/meminfo'):
 
 MEM_WARN_PERCENT = 85
 MEM_WARN_STREAK = 5
+HEALTH_STA_PARK_INTERVAL = 4  # every Nth health tick (~1/min at 15s poll)
 
 
 def health_check():
@@ -4755,6 +4756,21 @@ def health_check():
     # does not bring secondary monitors back). Repair them without cooldown.
     if _monitor_down('wlan1mon') or _monitor_down('wlan0mon'):
         _bring_monitors_up(h)
+    # The stock daemon re-enables its dummy STA during its own config
+    # reconvergence (e.g. after wifi reloads), silently pinning phy0 again.
+    # Re-park periodically — parking never runs wifi reload, so it is safe
+    # to repeat.
+    h['ticks'] = h.get('ticks', 0) + 1
+    if h['ticks'] % HEALTH_STA_PARK_INTERVAL == 0 and _sta_uplink_enabled():
+        try:
+            _park_dummy_sta()
+            h['last_action'] = 'dummy STA re-parked'
+            import mk8_events
+            mk8_events.log_event('guard_fix',
+                                 msg='re-parked dummy_radio0 STA '
+                                     '(stock reconvergence)')
+        except Exception:
+            pass
     h['mem_percent'] = _mem_percent()
     if h['mem_percent'] >= MEM_WARN_PERCENT:
         h['mem_streak'] = h.get('mem_streak', 0) + 1