Merge v17 into v18 (2026-09-08)

uSync.Backoffice.Management.Client/usync-assets/package.json

@@ -71,5 +71,8 @@
 		"typescript": "^5.9.3",
 		"vite": "^8.2.1",
 		"vite-plugin-dts": "^5.0.3"
+	},
+	"overrides": {
+		"js-yaml": "^4.3.1"
 	}
 }

uSync.Core/Extensions/StringExtensions.cs

@@ -16,14 +16,22 @@ public static class StringExtensions
     /// <summary>
     ///  convert a file name to one that isn't going to cause us any downlevel problems.
     /// </summary>
+    /// <remarks>
+    ///  paths aren't always parsed on the OS they came from (e.g. a Windows-style path
+    ///  loaded on Linux), so we split on both separators here rather than using
+    ///  Path.GetFileName/GetDirectoryName, which only recognise the current OS's separator.
+    /// </remarks>
     public static string ToAppSafeFileName(this string value)
     {
-        var filename = Path.GetFileName(value);
+        var separatorIndex = value.LastIndexOfAny(['\\', '/']);
+        var directory = separatorIndex >= 0 ? value[..(separatorIndex + 1)] : string.Empty;
+        var filename = separatorIndex >= 0 ? value[(separatorIndex + 1)..] : value;
+
         if (_badNames.InvariantContains(filename))
         {
-            return Path.Combine(
-                Path.GetDirectoryName(value) ?? string.Empty,
-                $"__{Path.GetFileNameWithoutExtension(value)}__{Path.GetExtension(value)}");
+            var extension = Path.GetExtension(filename);
+            var nameWithoutExtension = filename[..^extension.Length];
+            return $"{directory}__{nameWithoutExtension}__{extension}";
         }
         return value;
     }

uSync.History/history-client/package.json

@@ -27,5 +27,8 @@
     "prettier": "^3.9.6",
     "typescript": "^6.0.3",
     "vite": "^8.2.1"
+  },
+  "overrides": {
+    "js-yaml": "^4.3.1"
   }
 }