Improved Secret Service diagnostics on Linux (#868)

app/MindWork AI Studio/Tools/Rust/SecretStoreIssueCode.cs

@@ -0,0 +1,15 @@
+namespace AIStudio.Tools.Rust;
+
+/// <summary>
+/// A structured issue reported by the native credential store.
+/// </summary>
+public enum SecretStoreIssueCode
+{
+    NONE,
+    SECRET_NOT_FOUND,
+    NO_DEFAULT_COLLECTION,
+    COLLECTION_LOCKED,
+    PROMPT_DISMISSED,
+    SERVICE_UNAVAILABLE,
+    UNKNOWN,
+}