diff --git a/package-lock.json b/package-lock.json
index 1538447..1e345b7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -73,6 +73,7 @@
         "@types/react-dom": "^19.2.3",
         "@types/shell-quote": "^1.7.5",
         "@types/uuid": "^10.0.0",
+        "@types/ws": "^8.18.1",
         "@vitejs/plugin-react": "^4.3.4",
         "@vitest/ui": "^4.0.15",
         "autoprefixer": "^10.4.20",
@@ -4389,6 +4390,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/ws": {
+      "version": "8.18.1",
+      "resolved": "https://registry.npmjs.org/@types/ws/-/ws-8.18.1.tgz",
+      "integrity": "sha512-ThVF6DCVhA8kUGy+aazFQ4kXQ7E1Ty7A3ypFOe0IcJV8O/M511G99AW24irKrW56Wt44yG9+ij8FaqoBGkuBXg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@typescript-eslint/eslint-plugin": {
       "version": "8.48.0",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.48.0.tgz",
diff --git a/package.json b/package.json
index 46d704a..8320d18 100644
--- a/package.json
+++ b/package.json
@@ -81,6 +81,7 @@
     "@types/react-dom": "^19.2.3",
     "@types/shell-quote": "^1.7.5",
     "@types/uuid": "^10.0.0",
+    "@types/ws": "^8.18.1",
     "@vitejs/plugin-react": "^4.3.4",
     "@vitest/ui": "^4.0.15",
     "autoprefixer": "^10.4.20",
diff --git a/src/components/CommandLauncher.tsx b/src/components/CommandLauncher.tsx
index a4f487c..6e4e1f5 100644
--- a/src/components/CommandLauncher.tsx
+++ b/src/components/CommandLauncher.tsx
@@ -2,6 +2,7 @@ import { useEffect, useState } from "react";
 import { Command } from "cmdk";
 import { useAtom } from "jotai";
 import { useLiveQuery } from "dexie-react-hooks";
+import { useNavigate, useLocation } from "react-router";
 import db from "@/services/db";
 import { useGrimoire } from "@/core/state";
 import { manPages } from "@/types/man";
@@ -11,6 +12,19 @@ import { Dialog, DialogContent, DialogTitle } from "@/components/ui/dialog";
 import { VisuallyHidden } from "@/components/ui/visually-hidden";
 import "./command-launcher.css";
 
+/** Check if current path is a NIP-19 preview route (no window system) */
+function isNip19PreviewRoute(pathname: string): boolean {
+  // NIP-19 preview routes are single-segment paths starting with npub1, note1, nevent1, naddr1
+  const segment = pathname.slice(1); // Remove leading /
+  if (segment.includes("/")) return false; // Multi-segment paths are not NIP-19 previews
+  return (
+    segment.startsWith("npub1") ||
+    segment.startsWith("note1") ||
+    segment.startsWith("nevent1") ||
+    segment.startsWith("naddr1")
+  );
+}
+
 interface CommandLauncherProps {
   open: boolean;
   onOpenChange: (open: boolean) => void;
@@ -23,6 +37,8 @@ export default function CommandLauncher({
   const [input, setInput] = useState("");
   const [editMode, setEditMode] = useAtom(commandLauncherEditModeAtom);
   const { state, addWindow, updateWindow } = useGrimoire();
+  const navigate = useNavigate();
+  const location = useLocation();
 
   // Fetch spells with aliases
   const aliasedSpells =
@@ -107,6 +123,12 @@ export default function CommandLauncher({
       });
       setEditMode(null); // Clear edit mode
     } else {
+      // If on a NIP-19 preview route (no window system), navigate to dashboard first
+      // The window will appear after navigation since state persists
+      if (isNip19PreviewRoute(location.pathname)) {
+        navigate("/");
+      }
+
       // Normal mode: create new window
       addWindow(
         recognizedCommand.appId,
diff --git a/src/test/setup.ts b/src/test/setup.ts
index eba54c2..cc8847a 100644
--- a/src/test/setup.ts
+++ b/src/test/setup.ts
@@ -1,7 +1,12 @@
 /**
  * Vitest setup file
  *
- * Polyfills IndexedDB for Node.js test environment.
- * This allows Dexie to work in tests without a browser.
+ * Polyfills browser APIs for Node.js test environment.
  */
+
+// Polyfill IndexedDB - allows Dexie to work in tests
 import "fake-indexeddb/auto";
+
+// Polyfill WebSocket - required by nostr-tools relay code
+import { WebSocket } from "ws";
+globalThis.WebSocket = WebSocket as unknown as typeof globalThis.WebSocket;