diff --git a/dashboard/css/app.css b/dashboard/css/app.css
index 135772f..594949a 100644
--- a/dashboard/css/app.css
+++ b/dashboard/css/app.css
@@ -187,6 +187,7 @@ body{background:var(--bg-1);color:var(--ink-1);font-family:var(--font-ui);font-s
 .chart-cur{font-family:var(--font-mono);font-size:16px;font-weight:700}
 .chart-svg{width:100%;height:52px;display:block}
 .chart-axis{display:flex;justify-content:space-between;margin-top:2px;font-family:var(--font-terminal);font-size:9px;color:var(--ink-4)}
+.chart-minmax{display:flex;justify-content:space-between;margin-top:3px;font-family:var(--font-mono);font-size:9px;color:var(--ink-4)}
 .smart-btn{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:8px;
            border:1px solid var(--border-2);background:var(--bg-3);cursor:pointer;
            transition:background .12s,border-color .12s,transform .08s;font-family:var(--font-terminal);font-size:11px}
diff --git a/dashboard/js/app.js b/dashboard/js/app.js
index 016e650..1bb79a3 100644
--- a/dashboard/js/app.js
+++ b/dashboard/js/app.js
@@ -87,6 +87,8 @@ const App = (() => {
                     updateServerStats(msg.data);
                 } else if (msg.type === 'status_update') {
                     Grid.updateStatus(msg.agent_id, msg.data.status);
+                } else if (msg.type === 'agent_removed') {
+                    Grid.removeAgent(msg.agent_id);
                 }
             } catch {}
         };
diff --git a/dashboard/js/grid.js b/dashboard/js/grid.js
index 7ccb64b..1bd187c 100644
--- a/dashboard/js/grid.js
+++ b/dashboard/js/grid.js
@@ -111,8 +111,24 @@ const Grid = (() => {
     }
 
     function update(agentId, metrics) {
-        const entry = _agents.get(agentId);
-        if (!entry) return;
+        let entry = _agents.get(agentId);
+        if (!entry) {
+            // Nouvel agent découvert via WebSocket — on crée la tuile à la volée
+            const agent = {
+                id: agentId,
+                hostname: metrics.hostname || agentId,
+                ip: metrics.ip || '',
+                status: metrics.status || 'online',
+            };
+            _agents.set(agentId, { agent, metrics });
+            const grid = document.getElementById('agents-grid');
+            if (grid) grid.insertAdjacentHTML('beforeend', renderTile(agent, metrics));
+            updateStats();
+            return;
+        }
+        // Mettre à jour ip/status depuis les métriques fraîches
+        if (metrics.ip) entry.agent.ip = metrics.ip;
+        if (metrics.status) entry.agent.status = metrics.status;
         // Conserver les valeurs lentes (disque, smart) quand le paquet ne les contient pas
         if (entry.metrics) {
             for (const k of Object.keys(entry.metrics)) {
diff --git a/dashboard/js/popups.js b/dashboard/js/popups.js
index 51d86f8..b95a21c 100644
--- a/dashboard/js/popups.js
+++ b/dashboard/js/popups.js
@@ -69,6 +69,17 @@ const Popups = (() => {
         const cpuPts = Charts.historyToCpuPts(history);
         const memPts = Charts.historyToMemPts(history);
 
+        let ramMin = null, ramMax = null;
+        for (const h of history) {
+            if (h.memory_used != null) {
+                if (ramMin === null || h.memory_used < ramMin) ramMin = h.memory_used;
+                if (ramMax === null || h.memory_used > ramMax) ramMax = h.memory_used;
+            }
+        }
+        const ramMinMax = ramMin !== null
+            ? `<div class="chart-minmax"><span>min ${Grid.fmt(ramMin)}</span><span>max ${Grid.fmt(ramMax)}</span></div>`
+            : '';
+
         const smartBtn = metrics?.smart
             ? `<div class="smart-btn ok" onclick="Popups.showSmart('${esc(agentId)}')" data-tip="Voir la santé complète du disque">
                 <div class="smart-dot"></div>
@@ -118,6 +129,7 @@ const Popups = (() => {
                 </div>
                 <svg class="chart-svg" viewBox="0 0 200 52" preserveAspectRatio="none" id="det-mem-chart"></svg>
                 <div class="chart-axis"><span>−30min</span><span>−15min</span><span>now</span></div>
+                ${ramMinMax}
               </div>
             </div>
           </div>
diff --git a/server/handlers/agents.go b/server/handlers/agents.go
index 1708320..6566414 100644
--- a/server/handlers/agents.go
+++ b/server/handlers/agents.go
@@ -6,6 +6,7 @@ import (
 	"strings"
 
 	"github.com/user/nanometrics/server/db"
+	"github.com/user/nanometrics/server/models"
 )
 
 func AgentsHandler(database *db.DB) http.HandlerFunc {
@@ -23,7 +24,7 @@ func AgentsHandler(database *db.DB) http.HandlerFunc {
 	}
 }
 
-func DeleteAgentHandler(database *db.DB) http.HandlerFunc {
+func DeleteAgentHandler(database *db.DB, broadcast func(interface{})) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		parts := strings.Split(strings.Trim(r.URL.Path, "/"), "/")
 		if len(parts) < 3 {
@@ -35,6 +36,7 @@ func DeleteAgentHandler(database *db.DB) http.HandlerFunc {
 			http.Error(w, err.Error(), 500)
 			return
 		}
+		broadcast(models.WSMessage{Type: "agent_removed", AgentID: agentID})
 		w.WriteHeader(http.StatusNoContent)
 	}
 }
diff --git a/server/main.go b/server/main.go
index 161ac2d..b0f9acc 100644
--- a/server/main.go
+++ b/server/main.go
@@ -111,7 +111,7 @@ func main() {
 		case endsWith(r.URL.Path, "/icon") && r.Method == http.MethodGet:
 			handlers.IconGetHandler(database)(w, r)
 		case r.Method == http.MethodDelete:
-			handlers.DeleteAgentHandler(database)(w, r)
+			handlers.DeleteAgentHandler(database, hub.Broadcast)(w, r)
 		default:
 			http.NotFound(w, r)
 		}