feat(update): add setup fallback action and bump 2.1.2

- add installer asset detection in update service

- add 'Download and install (setup)' action in update dialog

- bump app version to 2.1.2 and extend update service test

services/update_service.py

@@ -71,6 +71,8 @@ def _extract_release_payload(release_data, repository_url, current_version):
     download_url = ""
     download_name = ""
     checksum_url = ""
+    installer_url = ""
+    installer_name = ""
     for asset in assets:
         url = asset.get("browser_download_url", "")
         if url.lower().endswith(".zip"):
@@ -81,6 +83,16 @@ def _extract_release_payload(release_data, repository_url, current_version):
         download_url = assets[0].get("browser_download_url", "")
         download_name = assets[0].get("name", "")
 
+    for asset in assets:
+        url = asset.get("browser_download_url", "")
+        name = asset.get("name", "")
+        name_lower = name.lower()
+        if installer_url:
+            break
+        if url.lower().endswith(".exe") and ("setup" in name_lower or "installer" in name_lower):
+            installer_url = url
+            installer_name = name
+
     for asset in assets:
         name = asset.get("name", "").lower()
         if not name:
@@ -102,6 +114,8 @@ def _extract_release_payload(release_data, repository_url, current_version):
         "release_url": html_url,
         "download_url": download_url,
         "download_name": download_name,
+        "installer_url": installer_url,
+        "installer_name": installer_name,
         "checksum_url": checksum_url,
         "has_update": _is_newer_version(latest_version, current_version),
     }