search and ai stabilization work, localization stablized.

src/__Libraries/StellaOps.Localization/LocaleContext.cs

@@ -0,0 +1,17 @@
+namespace StellaOps.Localization;
+
+/// <summary>
+/// Ambient locale for the current async call chain.
+/// Set by the localization middleware, read by <see cref="T._t"/>.
+/// </summary>
+public static class LocaleContext
+{
+    private static readonly AsyncLocal<string?> _current = new();
+
+    /// <summary>Current request locale (e.g., "de-DE"). Null falls back to default.</summary>
+    public static string? Current
+    {
+        get => _current.Value;
+        set => _current.Value = value;
+    }
+}