feat: portage complet en Rust (axum + sysinfo + tera)

Remplacement du backend Python/Flask par un binaire Rust natif.
Stack : axum (web), sysinfo (metriques), lettre (SMTP), tera (templates), argon2 (auth).
Binaire Windows 6.3 Mo sans dependance runtime.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

templates/dashboard.html

@@ -1,5 +1,5 @@
 {% extends "base.html" %}
-{% block title %}Supervision - Tableau de bord{% endblock %}
+{% block title %}Supervision - Tableau de bord{% endblock title %}
 
 {% block content %}
 <div class="d-flex justify-content-between align-items-center mb-3">
@@ -11,7 +11,7 @@
     </h4>
     <div class="d-flex align-items-center gap-2">
         <span id="last-update" class="text-muted small"></span>
-        <form method="POST" action="{{ url_for('toggle_monitoring') }}" class="d-inline">
+        <form method="POST" action="/api/monitoring/toggle" class="d-inline">
             {% if metrics and metrics.monitoring_active %}
             <button type="submit" class="btn btn-sm btn-outline-warning">
                 <i class="bi bi-pause-circle"></i> Pause
@@ -86,7 +86,7 @@
             </div>
         </div>
     </div>
-    <!-- Placeholder pour les disques - sera rempli par JS aussi -->
+    <!-- Disques -->
     {% for disk in metrics.disks %}
     <div class="col-md-4 mb-3">
         <div class="card metric-card" id="card-disk-{{ loop.index0 }}">
@@ -154,7 +154,7 @@
                                 {% endif %}
                             </td>
                             <td>{{ proc.total_cpu_percent }}%</td>
-                            <td><small>{{ proc.pids | join(', ') }}</small></td>
+                            <td><small>{{ proc.pids | join(sep=", ") }}</small></td>
                         </tr>
                         {% endfor %}
                     </tbody>
@@ -170,7 +170,7 @@
         <div class="card">
             <div class="card-header d-flex justify-content-between">
                 <h6 class="mb-0"><i class="bi bi-bell"></i> Alertes recentes</h6>
-                <a href="{{ url_for('alerts') }}" class="btn btn-sm btn-outline-primary">Voir tout</a>
+                <a href="/alerts" class="btn btn-sm btn-outline-primary">Voir tout</a>
             </div>
             <div class="card-body p-0">
                 <table class="table table-sm mb-0" id="recent-alerts">
@@ -187,7 +187,7 @@
 </div>
 
 {% endif %}
-{% endblock %}
+{% endblock content %}
 
 {% block scripts %}
 <script>
@@ -237,16 +237,7 @@ function refreshMetrics() {
         .catch(() => {});
 }
 
-function loadRecentAlerts() {
-    fetch('/api/metrics')
-        .then(r => r.json())
-        .then(() => {
-            // Charger les alertes separement via la page
-        })
-        .catch(() => {});
-}
-
 // Rafraichir toutes les 30 secondes
 setInterval(refreshMetrics, 30000);
 </script>
-{% endblock %}
+{% endblock scripts %}