Work App: a dedicated browser for work tools

A Tauri 2 shell with one child webview per configured tool. Nav on the left
with groups and a collapsible icon rail; links between configured apps switch
tabs, everything else leaves for the real browser.

Design spec in docs/superpowers/specs/2026-09-01-work-app-design.md.

src/main.tsx

@@ -0,0 +1,11 @@
+import React from "react";
+import ReactDOM from "react-dom/client";
+
+import App from "./App";
+import "./index.css";
+
+ReactDOM.createRoot(document.getElementById("root")!).render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+);