feat: Enhance update manager to handle UTF-8 BOM and improve asset resolution logic

src/webdrop_bridge/core/updater.py

@@ -93,7 +93,9 @@ class UpdateManager:
         """Download and parse a JSON asset from a release."""
         try:
             with urlopen(url, timeout=10) as response:
-                return json.loads(response.read().decode("utf-8"))
+                # Some release pipelines may upload JSON files with UTF-8 BOM.
+                # Use utf-8-sig to transparently handle both BOM and non-BOM files.
+                return json.loads(response.read().decode("utf-8-sig"))
         except (URLError, json.JSONDecodeError) as e:
             logger.error(f"Failed to download JSON asset: {e}")
             return None
@@ -148,8 +150,28 @@ class UpdateManager:
         brand_prefix = f"{self.brand_id}-*"
 
         installer_asset = None
+
+        # Prefer brand-specific naming when possible.
+        if self.brand_id == "webdrop_bridge":
+            preferred_patterns = ["webdropbridge-*.msi", "webdropbridge*.msi"]
+        else:
+            preferred_patterns = [f"{self.brand_id.lower()}-*.msi", f"{self.brand_id.lower()}*.msi"]
+
+        # 1) Try strict brand-pattern match first
         for asset in release.assets:
             asset_name = asset.get("name", "")
+            asset_name_lower = asset_name.lower()
+            if not asset_name_lower.endswith(extension):
+                continue
+            if any(fnmatch.fnmatch(asset_name_lower, pattern) for pattern in preferred_patterns):
+                installer_asset = asset
+                break
+
+        # 2) Fallback: preserve previous behavior (first installer for platform)
+        for asset in release.assets:
+            if installer_asset:
+                break
+            asset_name = asset.get("name", "")
             if not asset_name.endswith(extension):
                 continue