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/threads.html

@@ -4,6 +4,29 @@
     <div class="col">
       <h2>Threads{% if account %} for {{ account }}{% endif %}</h2>
       <p class="muted">Latest updated threads. Click an ID to view details and AI analysis.</p>
+      {% if status %}
+        <div class="muted" style="margin-top:6px;">
+          {% if status.sync_in_progress %}
+            <span class="badge brand">Syncing…</span>
+          {% else %}
+            {% if status.last_sync_status == 'ok' %}
+              <span class="badge success">Last sync OK</span>
+            {% elif status.last_sync_status == 'error' %}
+              <span class="badge warn">Last sync error</span>
+            {% else %}
+              <span class="badge">Idle</span>
+            {% endif %}
+          {% endif %}
+          <span style="margin-left:8px;">Last Sync: {{ status.last_sync_at or 'never' }}</span>
+          <span style="margin-left:8px;">Items: {{ status.last_sync_count }}</span>
+          {% if status.last_sync_error %}
+            <div class="muted">Error: {{ status.last_sync_error }}</div>
+          {% endif %}
+          {% if status.auto_process %}
+            <div class="muted">Auto process enabled (every {{ status.interval }}m)</div>
+          {% endif %}
+        </div>
+      {% endif %}
     </div>
   </div>
 
@@ -13,6 +36,7 @@
         <tr>
           <th>ID</th>
           <th>Subject</th>
+          <th>AI Summary</th>
           <th>Account</th>
           <th>Msgs</th>
           <th>Requires Reply</th>
@@ -24,6 +48,7 @@
           <tr>
             <td><a href="/thread/{{ t.id }}">{{ t.id }}</a></td>
             <td>{{ t.subject }}</td>
+            <td class="muted">{{ t.ai_summary or '' }}</td>
             <td><span class="badge">{{ t.account_email }}</span></td>
             <td><span class="badge brand">{{ t.messages|length }}</span></td>
             <td>