fix: replace invalid hass.async_at_start with helpers.start.async_at_start (v1.2.4)

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ---
 
+## [1.2.4] - 2026-03-11
+
+### Fixed
+- **`AttributeError: 'HomeAssistant' object has no attribute 'async_at_start'`:** replaced the invalid `hass.async_at_start()` call with the correct `homeassistant.helpers.start.async_at_start(hass, callback)` helper. This caused the entire integration setup to fail, making all services (`advanced_downloader.download_file`, etc.) unavailable.
+
+---
+
 ## [1.2.3] - 2026-03-11
 
 ### Fixed
@@ -222,6 +229,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Service `media_downloader.download_file` with optional subdirectories, custom filenames, overwrite control, and per-download timeout.
 - Events: `media_downloader_download_started`, `media_downloader_download_completed` (with `success` and `error` fields).
 
+[1.2.4]: https://github.com/Geek-MD/Advanced_Downloader/compare/v1.2.3...v1.2.4
 [1.2.3]: https://github.com/Geek-MD/Advanced_Downloader/compare/v1.2.2...v1.2.3
 [1.2.2]: https://github.com/Geek-MD/Advanced_Downloader/compare/v1.2.1...v1.2.2
 [1.2.1]: https://github.com/Geek-MD/Advanced_Downloader/compare/v1.2.0...v1.2.1

custom_components/advanced_downloader/__init__.py

@@ -13,6 +13,7 @@
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.core import HomeAssistant, ServiceCall, callback
 from homeassistant.helpers import aiohttp_client, config_validation as cv
+from homeassistant.helpers.start import async_at_start
 from homeassistant.exceptions import HomeAssistantError
 
 # Handle asyncio.timeout availability (Python 3.11+)
@@ -103,7 +104,7 @@ def _check_downloader_conflict(_: HomeAssistant) -> None:
                 notification_id="advanced_downloader_core_downloader_conflict",
             )
 
-    hass.async_at_start(_check_downloader_conflict)
+    async_at_start(hass, _check_downloader_conflict)
 
     # Warn if Video Normalizer is also configured as a standalone integration.
     # Its code must remain installed (Advanced Downloader imports from it), but

custom_components/advanced_downloader/manifest.json

@@ -9,5 +9,5 @@
   "issue_tracker": "https://github.com/Geek-MD/Advanced_Downloader/issues",
   "quality_scale": "legacy",
   "requirements": [],
-  "version": "1.2.3"
+  "version": "1.2.4"
 }