diff --git a/frontend/src/features/plugins/PluginsPanel.tsx b/frontend/src/features/plugins/PluginsPanel.tsx
index 6b1c6e4..0fb76a7 100644
--- a/frontend/src/features/plugins/PluginsPanel.tsx
+++ b/frontend/src/features/plugins/PluginsPanel.tsx
@@ -217,11 +217,13 @@ export function PluginsPanel() {
         <ConfirmDialog
           title={`Installer "${installFlow.review.displayName}" ?`}
           body={reviewSummary(installFlow.review)}
-          confirmLabel={installFlow.review.installable ? "Installer" : "Corriger avant d'installer"}
+          confirmLabel={
+            isInstallable(installFlow.review) ? "Installer" : "Corriger avant d'installer"
+          }
           busy={vm.busy}
-          danger={!installFlow.review.installable}
+          danger={!isInstallable(installFlow.review)}
           onConfirm={() => {
-            if (installFlow.review.installable) void confirmInstall();
+            if (isInstallable(installFlow.review)) void confirmInstall();
             else setInstallFlow(null);
           }}
           onCancel={() => setInstallFlow(null)}
@@ -259,7 +261,13 @@ function reviewSummary(review: PluginReview): string {
     review.description ?? null,
     `Confiance : full-trust — ce plugin peut exécuter du code arbitraire dans IdeA.`,
     `Contributions : ${c.topLevelMenus} menu(s), ${c.menuItems} item(s), ${c.layouts} layout(s), ${c.mcpServers} serveur(s) MCP.`,
-    ...review.issues.map((i) => `${i.severity === "error" ? "Erreur" : "Avertissement"} : ${i.message}`),
+    ...(review.issues ?? []).map(
+      (i) => `${i.severity === "error" ? "Erreur" : "Avertissement"} : ${i.message}`,
+    ),
   ].filter((p): p is string => Boolean(p));
   return parts.join("\n");
 }
+
+function isInstallable(review: PluginReview): boolean {
+  return review.installable ?? true;
+}
diff --git a/frontend/src/features/plugins/usePlugins.ts b/frontend/src/features/plugins/usePlugins.ts
index 2814468..feb5508 100644
--- a/frontend/src/features/plugins/usePlugins.ts
+++ b/frontend/src/features/plugins/usePlugins.ts
@@ -86,8 +86,8 @@ export function usePlugins(): PluginsViewModel {
       setBusy(true);
       setError(null);
       try {
-        const result = await plugin.installFromArchive(path);
-        setPlugins((prev) => [...prev.filter((p) => p.id !== result.plugin.id), result.plugin]);
+        await plugin.installFromArchive(path);
+        setPlugins(await plugin.listPlugins());
         return true;
       } catch (e) {
         setError(describe(e));
@@ -104,8 +104,8 @@ export function usePlugins(): PluginsViewModel {
       setBusy(true);
       setError(null);
       try {
-        const result = await plugin.installFromDirectory(path);
-        setPlugins((prev) => [...prev.filter((p) => p.id !== result.plugin.id), result.plugin]);
+        await plugin.installFromDirectory(path);
+        setPlugins(await plugin.listPlugins());
         return true;
       } catch (e) {
         setError(describe(e));
@@ -122,8 +122,8 @@ export function usePlugins(): PluginsViewModel {
       setBusy(true);
       setError(null);
       try {
-        const updated = await plugin.setEnabled(pluginId, enabled);
-        setPlugins((prev) => prev.map((p) => (p.id === pluginId ? updated : p)));
+        await plugin.setEnabled(pluginId, enabled);
+        setPlugins(await plugin.listPlugins());
       } catch (e) {
         setError(describe(e));
       } finally {
@@ -139,7 +139,7 @@ export function usePlugins(): PluginsViewModel {
       setError(null);
       try {
         await plugin.uninstall(pluginId);
-        setPlugins((prev) => prev.filter((p) => p.id !== pluginId));
+        setPlugins(await plugin.listPlugins());
       } catch (e) {
         setError(describe(e));
       } finally {