06/05 Optimize app: Add Plaid web hook, healthcheck

app/templates/plaid/index.html

@@ -39,6 +39,39 @@
     </div>
 </div>
 
+<!-- Webhook status card -->
+<div class="pcard mb-4" style="border-left:3px solid {% if config.get('PLAID_WEBHOOK_URL') %}#7c3aed{% else %}#94a3b8{% endif %};">
+    <div class="d-flex align-items-center justify-content-between flex-wrap gap-3">
+        <div>
+            <div style="font-size:13px;font-weight:600;margin-bottom:2px;">
+                <i class="bi bi-bell{% if config.get('PLAID_WEBHOOK_URL') %}-fill text-primary{% else %}{% endif %} me-1"></i>
+                Automatic Transaction Sync (Webhooks)
+            </div>
+            {% if config.get('PLAID_WEBHOOK_URL') %}
+            <div style="font-size:11px;color:var(--muted);">
+                Webhook URL: <code style="font-size:11px;">{{ config.get('PLAID_WEBHOOK_URL') }}</code>
+                — Plaid will push transaction updates automatically.
+            </div>
+            {% else %}
+            <div style="font-size:11px;color:var(--muted);">
+                Not configured. Set <code>PLAID_WEBHOOK_URL=https://pfm.ngodanguyen.tech/plaid/webhook</code>
+                in <code>.env</code> and restart. New connections will register it automatically.
+                For existing items, click "Apply to Existing" after setting the URL.
+            </div>
+            {% endif %}
+        </div>
+        {% if config.get('PLAID_WEBHOOK_URL') and items %}
+        <form method="POST" action="{{ url_for('plaid.update_webhook') }}">
+            <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+            <button type="submit" class="btn btn-sm btn-outline-primary" style="font-size:12px;"
+                    title="Register the configured PLAID_WEBHOOK_URL with all connected Plaid items">
+                <i class="bi bi-arrow-repeat me-1"></i>Apply to Existing Items
+            </button>
+        </form>
+        {% endif %}
+    </div>
+</div>
+
 {% if items %}
 {% for item in items %}
 <div class="pcard mb-3">