ask user to install bridge plugin for vault copied to server at runtime

src/ui/bootstrap.js

@@ -48,6 +48,42 @@ export function showConfirmDialog(
   });
 }
 
+export function showPluginInstallDialog(vaultId) {
+  return new Promise((resolve) => {
+    const dialog = new window.IgnisUI.PluginInstallDialog({
+      target: document.body,
+    });
+
+    dialog.$on("install", async () => {
+      try {
+        await fetch("/api/vault/install-plugin", {
+          method: "POST",
+          headers: { "Content-Type": "application/json" },
+          body: JSON.stringify({ vault: vaultId }),
+        });
+      } catch (e) {
+        console.error("[ignis] Failed to install plugin:", e);
+      }
+      dialog.$destroy();
+      resolve("install");
+    });
+
+    dialog.$on("dismiss", async () => {
+      try {
+        await fetch("/api/vault/install-plugin", {
+          method: "POST",
+          headers: { "Content-Type": "application/json" },
+          body: JSON.stringify({ vault: vaultId, dismiss: true }),
+        });
+      } catch (e) {
+        console.error("[ignis] Failed to dismiss plugin prompt:", e);
+      }
+      dialog.$destroy();
+      resolve("dismiss");
+    });
+  });
+}
+
 export function showPromptDialog(
   title,
   label,