fix: PDF extraction bbox compatibility, update date formats, and bump max retries

- Fix bbox format detection in pdf_image_extractor (support Rect and tuple)
- Update date display format to include year (%Y-%m-%d) across templates
- Increase SUMMARY_MAX_RETRIES from 1 to 2 for better error recovery
- Widen date input field for better usability

app/templates/admin_dashboard.html

@@ -92,7 +92,7 @@
             <tbody>
               {% for log in scheduler_history %}
               <tr>
-                <td class="time-cell">{{ log.started_at.strftime('%m-%d %H:%M') if log.started_at else '-' }}</td>
+                <td class="time-cell">{{ log.started_at.strftime('%Y-%m-%d %H:%M') if log.started_at else '-' }}</td>
                 <td><span class="status-badge status-{{ log.status }}">
                   {% if log.status == 'success' %}✓{% elif log.status == 'running' %}⟳{% elif log.status == 'failed' %}✗{% else %}{{ log.status }}{% endif %}
                 </span></td>
@@ -158,8 +158,8 @@
             <td>{{ log.date or '-' }}</td>
             <td>{{ log.papers_found or 0 }}</td>
             <td>{{ log.papers_new or 0 }}</td>
-            <td class="time-cell">{{ log.started_at.strftime('%m-%d %H:%M') if log.started_at else '-' }}</td>
-            <td class="time-cell">{{ log.completed_at.strftime('%m-%d %H:%M') if log.completed_at else '-' }}</td>
+            <td class="time-cell">{{ log.started_at.strftime('%Y-%m-%d %H:%M') if log.started_at else '-' }}</td>
+            <td class="time-cell">{{ log.completed_at.strftime('%Y-%m-%d %H:%M') if log.completed_at else '-' }}</td>
             <td class="error-cell" title="{{ log.error or '' }}">
               {{ (log.error[:60] + '...') if log.error and log.error|length > 60 else (log.error or '-') }}
             </td>