Strengthen workflow automation diagnostics

MeetingAssistant/Workflow/MeetingWorkflowEngine.cs

@@ -230,11 +230,11 @@ public sealed class MeetingWorkflowEngine : IMeetingWorkflowEngine
         switch (step.Uses.Trim().ToLowerInvariant())
         {
             case "add_attendee":
-                return AddUnique(meeting.Frontmatter.Attendees, value);
+                return AddUnique(meeting.Frontmatter.Attendees, value, MeetingAttendeeNames.NormalizeDisplayName);
             case "remove_attendee":
                 return RemoveValue(meeting.Frontmatter.Attendees, value);
             case "add_project":
-                return AddUnique(meeting.Frontmatter.Projects, value);
+                return AddUnique(meeting.Frontmatter.Projects, value, static project => project.Trim());
             case "set_property":
                 return SetProperty(meeting, step.Property ?? step.Name, value);
             case "add_context":
@@ -283,11 +283,17 @@ public sealed class MeetingWorkflowEngine : IMeetingWorkflowEngine
         throw new InvalidOperationException($"Unsupported meeting workflow property '{property}'.");
     }
 
-    private static bool AddUnique(List<string> values, string value)
+    private static bool AddUnique(
+        List<string> values,
+        string value,
+        Func<string, string> normalize)
     {
-        var normalized = MeetingAttendeeNames.NormalizeDisplayName(value);
+        var normalized = normalize(value);
         if (string.IsNullOrWhiteSpace(normalized) ||
-            values.Any(existing => string.Equals(existing, normalized, StringComparison.OrdinalIgnoreCase)))
+            values.Any(existing => string.Equals(
+                normalize(existing),
+                normalized,
+                StringComparison.OrdinalIgnoreCase)))
         {
             return false;
         }