add new concept report

backend/src/main/java/com/aiteacher/enrichment/ConceptFacet.java

@@ -0,0 +1,27 @@
+package com.aiteacher.enrichment;
+
+public enum ConceptFacet {
+    DEFINITION("Definition & Overview"),
+    ANATOMY("Anatomy"),
+    PATHOPHYSIOLOGY("Pathophysiology"),
+    EPIDEMIOLOGY("Epidemiology"),
+    CLINICAL_PRESENTATION("Clinical Presentation"),
+    IMAGING("Imaging"),
+    CLASSIFICATION("Classification & Grading"),
+    INDICATIONS("Indications & Patient Selection"),
+    SURGICAL_TECHNIQUE("Surgical Technique"),
+    NONSURGICAL_MANAGEMENT("Non-surgical Management"),
+    COMPLICATIONS("Complications"),
+    OUTCOMES_FOLLOWUP("Outcomes & Follow-up"),
+    OTHER("Other");
+
+    private final String displayTitle;
+
+    ConceptFacet(String displayTitle) {
+        this.displayTitle = displayTitle;
+    }
+
+    public String displayTitle() {
+        return displayTitle;
+    }
+}