fix: fix PWA

web/src/routes/+page.svelte

@@ -1,5 +1,10 @@
 <script lang="ts">
   import { onMount, onDestroy } from "svelte";
+
+  interface BeforeInstallPromptEvent extends Event {
+    prompt(): Promise<void>;
+    readonly userChoice: Promise<{ outcome: "accepted" | "dismissed" }>;
+  }
   import { goto } from "$app/navigation";
   import {
     fetchContainers,
@@ -59,6 +64,25 @@
     return "dot-other";
   }
 
+  // PWA install prompt
+  let installPrompt = $state<BeforeInstallPromptEvent | null>(null);
+
+  function onBeforeInstallPrompt(e: Event) {
+    e.preventDefault();
+    installPrompt = e as BeforeInstallPromptEvent;
+  }
+
+  function onAppInstalled() {
+    installPrompt = null;
+  }
+
+  async function installPWA() {
+    if (!installPrompt) return;
+    installPrompt.prompt();
+    await installPrompt.userChoice;
+    installPrompt = null;
+  }
+
   let disconnect: (() => void) | null = null;
 
   async function load() {
@@ -99,9 +123,15 @@
       if (evt.type === "containers.updated") load();
       if (evt.type === "agent.connected" || evt.type === "agent.disconnected") load();
     });
+    window.addEventListener("beforeinstallprompt", onBeforeInstallPrompt);
+    window.addEventListener("appinstalled", onAppInstalled);
   });
 
-  onDestroy(() => disconnect?.());
+  onDestroy(() => {
+    disconnect?.();
+    window.removeEventListener("beforeinstallprompt", onBeforeInstallPrompt);
+    window.removeEventListener("appinstalled", onAppInstalled);
+  });
 
   function uniquePorts(ports: ContainerPort[] | null) {
     const seen = new Set<string>();
@@ -168,6 +198,15 @@
         </span>
       {/if}
 
+      {#if installPrompt}
+        <button onclick={installPWA} class="nav-btn" title="Installer l'application">
+          <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75"
+              d="M4 16v2a2 2 0 002 2h12a2 2 0 002-2v-2M7 10l5 5m0 0l5-5m-5 5V4" />
+          </svg>
+        </button>
+      {/if}
+
       <a href="/admin" class="nav-btn" title="Administration">
         <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
           <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75"