fix: Trying to fix Auto Restart. And Fixed MQTT admin auth

backend/mqtt/auth.py

@@ -18,7 +18,7 @@ User types handled:
 - Kiosk users (e.g. "PV25L22BP01R01-kiosk"):
     Same HMAC auth derived from the full kiosk username.
     ACL: allowed to access topics of their base device (suffix stripped).
-- bonamin, NodeRED, and other non-device users:
+- admin, bonamin, NodeRED, and other non-device users:
     These connect via the passwd file backend (go-auth file backend).
     They never reach this HTTP backend — go-auth resolves them first.
     The ACL endpoint below handles them defensively anyway (superuser list).
@@ -35,7 +35,7 @@ LEGACY_PASSWORD = "vesper"
 
 # Users authenticated via passwd file (go-auth file backend).
 # If they somehow reach the HTTP ACL endpoint, grant full access.
-SUPERUSERS = {"bonamin", "NodeRED"}
+SUPERUSERS = {"admin", "bonamin", "NodeRED"}
 
 
 def _derive_password(username: str) -> str:
@@ -86,7 +86,7 @@ async def mqtt_auth_user(
                or kiosk variant: "PV25L22BP01R01-kiosk"
     Password = HMAC-derived (new firmware) or "vesper" (legacy firmware)
 
-    Note: bonamin and NodeRED authenticate via the go-auth passwd file backend
+    Note: admin, bonamin and NodeRED authenticate via the go-auth passwd file backend
     and never reach this endpoint.
     """
     if _is_valid_password(username, password):