feat(search): add structured filters to AI session list endpoint and frontend

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/app/templates/export_pdf.html

@@ -362,5 +362,24 @@
   </div>
   {% endif %}
 
+  <!-- File Upload Evidence -->
+  {% if uploads %}
+  <div class="supporting-data">
+    <div class="section-title">Evidence</div>
+    <div style="display: flex; flex-wrap: wrap; gap: 12px;">
+      {% for upload in uploads %}
+      <div style="margin-bottom: 8px;">
+        {% if upload.is_image %}
+        <img src="{{ upload.url }}" alt="{{ upload.filename }}" style="max-width: 400px; border-radius: 8px; display: block; margin-bottom: 4px;" />
+        <div style="font-size: 0.8em; color: #666;">{{ upload.filename }}</div>
+        {% else %}
+        <a href="{{ upload.url }}" style="color: #06b6d4;">{{ upload.filename }}</a>
+        {% endif %}
+      </div>
+      {% endfor %}
+    </div>
+  </div>
+  {% endif %}
+
 </body>
 </html>