updated front end

python/ebook_search/api/static/style.css

@@ -138,3 +138,12 @@ th {
     color: #9f1d20;
     font-weight: 700;
 }
+
+.notice {
+    margin: 8px 0;
+    padding: 8px 12px;
+    border-left: 4px solid #c8881d;
+    background: #fcf3e2;
+    color: #6b4a06;
+    font-weight: 600;
+}

python/ebook_search/api/templates/partials/results.html

@@ -23,6 +23,16 @@
 {% endif %}
 <section class="answer">
     <h2>Answer</h2>
+    {% if low_confidence|default(false) %}
+        <p class="notice">Low retrieval confidence — answer generation was skipped.</p>
+    {% endif %}
+    {% set report = citation_report|default(none) %}
+    {% if report is not none and not report.grounded %}
+        <p class="notice">Unverified — no source citations were found in this answer.</p>
+    {% endif %}
+    {% if report is not none and report.invalid %}
+        <p class="notice">Invalid citations: {{ report.invalid|join(", ") }} (no matching source).</p>
+    {% endif %}
     <p>{{ answer }}</p>
 </section>
 {% if response.results %}