fix(reliability): recreate missing pineapd section; honest uci-set reporting

payload/user/remote_access/pager-webui/mk8_guard.py

@@ -31,8 +31,24 @@ def _pool_size():
     return len(out.split())
 
 
+def _ensure_pineapd_section():
+    """Stock daemon rewrites and profile restores can drop the whole
+    `config pineapd` section; every @pineapd[0] option write fails with
+    'Invalid argument' until it exists again."""
+    rc, out, err = device_run(['uci', '-q', 'get',
+                               'pineapd.@pineapd[0].logrecon'])
+    if rc == 0:
+        return False
+    device_run(['uci', 'add', 'pineapd', 'pineapd'])
+    device_run(['uci', 'commit', 'pineapd'])
+    return True
+
+
 def reconcile(clear_pool=True):
-    changed = _apply_uci_wanted(_wanted())
+    changed = []
+    if _ensure_pineapd_section():
+        changed.append('pineapd.@pineapd[0] (section recreated)')
+    changed += _apply_uci_wanted(_wanted())
     pool_cleared = False
     if clear_pool and _pool_size() > POOL_CLEAR_MAX:
         device_run(['uci', 'delete', 'pineapd.@ssidpool[0].ssid'])
@@ -51,6 +67,7 @@ def guard_report():
     if cached is not None and now - _GR_CACHE['t'] < GR_TTL_SECONDS:
         return cached
     from server import _pending_uci
+    _ensure_pineapd_section()
     pending = _pending_uci(_wanted())
     report = {'in_sync': not pending, 'pending': pending,
               'pool_size': _pool_size()}