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

tests/test_health.py

@@ -1,6 +1,7 @@
 import os
 import sys
 import unittest
+from unittest import mock
 
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'payload', 'user', 'remote_access', 'pager-webui'))
 import server
@@ -150,6 +151,25 @@ class SupervisorExtrasTest(unittest.TestCase):
         open(path, 'w').write(content)
         self.assertEqual(server._mem_percent(path), 60)
 
+    def test_health_reparks_resurrected_dummy_sta(self):
+        server._health['ticks'] = server.HEALTH_STA_PARK_INTERVAL - 1
+        with mock.patch.object(
+                server, '_sta_uplink_enabled', return_value=True), \
+             __import__('unittest').mock.patch.object(
+                server, '_park_dummy_sta') as park:
+            h = server.health_check()
+            park.assert_called_once()
+            self.assertEqual(server._health['ticks'],
+                             server.HEALTH_STA_PARK_INTERVAL)
+        # not on interval ticks: no re-park
+        server._health['ticks'] = 1
+        with mock.patch.object(
+                server, '_sta_uplink_enabled', return_value=True), \
+             __import__('unittest').mock.patch.object(
+                server, '_park_dummy_sta') as park:
+            server.health_check()
+            park.assert_not_called()
+
     def test_health_reports_events_and_counters(self):
         import mk8_events
         mk8_events.log_event('restart', msg='x')