diff --git a/app/frontend/ui.py b/app/frontend/ui.py
index d166661..5f87fcd 100644
--- a/app/frontend/ui.py
+++ b/app/frontend/ui.py
@@ -107,7 +107,7 @@ def render_intent_badge(intent, source):
 
 def render_sources(sources, query_id):
     """
-    Rendert Quellen inklusive granularem Feedback-Mechanismus.
+    Rendert Quellen inklusive granularem Feedback-Mechanismus (1-5 via Faces).
     """
     if not sources:
         return
@@ -136,22 +136,25 @@ def render_sources(sources, query_id):
                 for r in hit['explanation'].get('reasons', []):
                     st.caption(f"- {r.get('message')}")
 
-            # 3. Granulares Feedback (Source Level)
+            # 3. Granulares Feedback (Source Level) - JETZT MIT NUANCEN
             st.markdown("---")
-            c1, c2 = st.columns([3, 1])
+            c1, c2 = st.columns([2, 2])
             with c1:
-                st.caption("War diese Quelle hilfreich für die Antwort?")
+                st.caption("Relevanz dieser Quelle:")
             with c2:
                 # Callback Wrapper für Source-Feedback
                 def on_source_fb(qid=query_id, nid=node_id, k=f"fb_src_{node_id}"):
                     val = st.session_state.get(k)
-                    # Mapping: Thumbs Up (1) -> Score 5, Thumbs Down (0) -> Score 1
-                    mapped_score = 5 if val == 1 else 1
-                    submit_feedback(qid, nid, mapped_score, comment="Source Feedback via UI")
+                    # Mapping: 
+                    # Faces liefert 0 (😞) bis 4 (😀).
+                    # Wir mappen das auf 1-5 für das Backend.
+                    if val is not None:
+                        submit_feedback(qid, nid, val + 1, comment="Source Feedback (Faces)")
 
+                # 'faces' bietet 5 Stufen: 😞(1) 🙁(2) 😐(3) 🙂(4) 😀(5)
                 st.feedback(
-                    "thumbs", 
-                    key=f"fb_src_{query_id}_{node_id}", # Unique Key pro Query/Node
+                    "faces", 
+                    key=f"fb_src_{query_id}_{node_id}", 
                     on_change=on_source_fb,
                     kwargs={"qid": query_id, "nid": node_id, "k": f"fb_src_{query_id}_{node_id}"}
                 )