feat: Home Assistant integration — live status + auto-sync print slots

templates/printers.html

@@ -15,7 +15,7 @@
       <div class="card-body p-0">
         <table class="table table-hover mb-0">
           <thead class="table-light">
-            <tr><th>Nom</th><th>Statut</th><th>Notes</th><th></th></tr>
+            <tr><th>Nom</th><th>Statut</th><th>Préfixe HA</th><th>Notes</th><th></th></tr>
           </thead>
           <tbody>
             {% for p in printers %}
@@ -28,6 +28,13 @@
                 <span class="badge bg-secondary">Inactive</span>
                 {% endif %}
               </td>
+              <td>
+                {% if p.ha_entity_prefix %}
+                <code class="small text-primary">{{ p.ha_entity_prefix }}</code>
+                {% else %}
+                <span class="text-muted small">—</span>
+                {% endif %}
+              </td>
               <td class="text-muted small">{{ p.notes or '—' }}</td>
               <td>
                 <div class="d-flex gap-1">
@@ -59,6 +66,12 @@
             <label class="form-label fw-semibold">Nom</label>
             <input type="text" name="name" class="form-control" required placeholder="ex: A1 #7, X1C #1">
           </div>
+          <div class="mb-3">
+            <label class="form-label fw-semibold">Préfixe entité Home Assistant <span class="text-muted fw-normal small">(optionnel)</span></label>
+            <input type="text" name="ha_entity_prefix" class="form-control font-monospace"
+                   placeholder="ex : patabambulab01">
+            <div class="form-text">Préfixe HA pour la synchro automatique du planning. Configurer l'URL HA dans <a href="{{ url_for('settings') }}">Paramètres</a>.</div>
+          </div>
           <div class="mb-3">
             <label class="form-label fw-semibold">Notes</label>
             <input type="text" name="notes" class="form-control" placeholder="couleur, emplacement…">