fix(app): settings review — startup theme default, slider/shell input UX, dedupe accents, memoize palette

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/src/main.tsx

@@ -1,6 +1,7 @@
 import React from "react";
 import ReactDOM from "react-dom/client";
 import { App } from "./App";
+import { applyTheme } from "./theme";
 import "@fontsource/inter/400.css";
 import "@fontsource/inter/500.css";
 import "@fontsource/inter/600.css";
@@ -9,6 +10,10 @@ import "@fontsource-variable/jetbrains-mono";
 import "@xterm/xterm/css/xterm.css";
 import "./styles.css";
 
+// Apply default theme before React renders so CSS vars are never unset,
+// even if the daemon is slow or offline. getConfig() overrides this later.
+applyTheme("dark", "blue");
+
 ReactDOM.createRoot(document.getElementById("root")!).render(
   <React.StrictMode>
     <App />