fix: guard config flow against concurrent duplicate entries and revert out-of-scope init changes

custom_components/nestquest/__init__.py

@@ -19,11 +19,9 @@ async def async_setup(hass: HomeAssistant, config: dict[str, Any]) -> bool:
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up NestQuest from a config entry."""
     hass.data.setdefault(DOMAIN, {})
-    hass.data[DOMAIN][entry.entry_id] = entry
     return True
 
 
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
-    hass.data.setdefault(DOMAIN, {}).pop(entry.entry_id, None)
     return True

custom_components/nestquest/config_flow.py

@@ -18,11 +18,8 @@ class NestQuestConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
         self, user_input: dict[str, Any] | None = None
     ) -> FlowResult:
         """Handle the user step of the config flow."""
-        existing = any(
-            entry.domain == DOMAIN
-            for entry in self.hass.config_entries.async_entries(DOMAIN)
-        )
-        if existing:
+        await self.async_set_unique_id(DOMAIN, raise_on_progress=False)
+        if self._async_in_progress() or self._async_current_entries():
             return self.async_abort(reason="single_instance_allowed")
 
         if user_input is None: