Implement email alert system with WhatsApp notifications

- Added alerts processing logic in src/alerts.py to analyze threads and send WhatsApp alerts based on configured time frames.
- Created FastAPI application in src/app.py to manage threads, display configurations, and trigger alert processing.
- Developed database models and utility functions in src/database.py for managing threads and messages.
- Integrated Twilio API for sending WhatsApp messages in src/whatsapp_sender.py.
- Implemented Zoho email client in src/zoho_client.py to fetch emails and check for replies.
- Added configuration management for email settings and alert parameters.
- Established auto-processing loop for periodic email syncing and alert generation.

templates/thread_detail.html

@@ -23,8 +23,10 @@
           <strong>Actionable:</strong>
           {% if ai.actionable %}<span class="badge warn">Yes</span>{% else %}<span class="badge success">No</span>{% endif %}
         </p>
-        <p><strong>Summary:</strong> {{ ai.summary }}</p>
+  <p><strong>Summary:</strong> {{ ai.summary or thread.ai_summary }}</p>
         <p class="muted">Confidence: {{ ai.confidence }} • Model: {{ ai.model }}</p>
+  <p class="muted">Last stored: {{ thread.last_analyzed_at }}</p>
+  <p class="muted">Last alert level sent: {{ thread.last_alert_level_sent }} at {{ thread.last_alert_sent_at }}</p>
       </div>
     </div>
   </div>