feat: enhance UI, refactor services, improve templates and tests

- Replace image_extractor with pdf_image_extractor service
- Enhance pi_client with expanded API capabilities
- Improve summarizer service with additional features
- Update admin routes with more endpoints
- Add login page template
- Enhance detail page with comprehensive layout
- Improve search and trends pages
- Update base template with additional elements
- Refactor tests for better coverage
- Add validate_summary script
- Update project configuration and dependencies

app/templates/partials/paper_card.html

@@ -34,18 +34,31 @@
       <span
         class="summary-badge summary-{{ paper.summary_status.status if paper.summary_status else 'none' }}"
       >
-        {% if not paper.summary_status or paper.summary_status.status ==
-        'pending' %} 未总结 {% elif paper.summary_status.status == 'processing'
-        %} 🔄 总结中 {% elif paper.summary_status.status == 'failed' or
-        paper.summary_status.status == 'permanent_failure' %} ❌ 总结失败 {%
-        elif paper.summary_status.status == 'done' %} ✅ 已总结 {% endif %}
+        {# djlint:off #}
+        {% if not paper.summary_status or paper.summary_status.status == 'pending' %}
+          未总结
+        {% elif paper.summary_status.status == 'processing' %}
+          🔄 总结中
+        {% elif paper.summary_status.status == 'failed' or paper.summary_status.status == 'permanent_failure' %}
+          ❌ 总结失败
+        {% elif paper.summary_status.status == 'done' %}
+          ✅ 已总结
+        {% endif %}
+        {# djlint:on #}
       </span>
       {% if paper.reading_status %}
       <span class="reading-badge reading-{{ paper.reading_status.status }}">
-        {% if paper.reading_status.status == 'unread' %}未读 {% elif
-        paper.reading_status.status == 'skimmed' %}已浏览 {% elif
-        paper.reading_status.status == 'read_summary' %}已读摘要 {% elif
-        paper.reading_status.status == 'read_full' %}已读原文 {% endif %}
+        {# djlint:off #}
+        {% if paper.reading_status.status == 'unread' %}
+          未读
+        {% elif paper.reading_status.status == 'skimmed' %}
+          已浏览
+        {% elif paper.reading_status.status == 'read_summary' %}
+          已读摘要
+        {% elif paper.reading_status.status == 'read_full' %}
+          已读原文
+        {% endif %}
+        {# djlint:on #}
       </span>
       {% endif %}
     </div>