Fix reasoning model directive response identity

crates/aether-ai-formats/src/formats/shared/model_directives.rs

@@ -98,6 +98,21 @@ pub fn model_directive_base_model(model: &str) -> Option<String> {
     parse_model_directive(model).map(|directive| directive.base_model)
 }
 
+pub(crate) fn model_directive_display_model(model: &str) -> Option<String> {
+    let model = model.trim();
+    parse_model_directive(model)?;
+    Some(model.to_string())
+}
+
+pub(crate) fn model_directive_display_model_from_report_context(
+    report_context: &Value,
+) -> Option<String> {
+    report_context
+        .get("model")
+        .and_then(Value::as_str)
+        .and_then(model_directive_display_model)
+}
+
 pub fn normalize_model_directive_model(model: &str) -> String {
     parse_model_directive(model)
         .map(|directive| directive.base_model)