feat: redesign UI and UX around design-engineering principles

- Ink-first palette, drop gradients/glow; tabular numbers
- Home: form stays put, results stack below and auto-copy; paste shortens instantly
- Hold-to-delete replaces the delete confirm modal
- Copy buttons morph to a check instead of toasting
- Motion: CSS press feedback, custom ease-out, origin-aware menu, faster exits,
  no animation on frequent/keyboard actions, reduced-motion respected
- Fix: scheme-less URLs ("example.com") were blocked by native validation

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/main.tsx

@@ -1,6 +1,7 @@
 import { StrictMode } from "react";
 import { createRoot } from "react-dom/client";
 import { BrowserRouter } from "react-router-dom";
+import { MotionConfig } from "framer-motion";
 import App from "./App";
 import { ThemeProvider } from "./context/ThemeContext";
 import { AuthProvider } from "./context/AuthContext";
@@ -12,6 +13,8 @@ import "./index.css";
 function render() {
   createRoot(document.getElementById("root")!).render(
     <StrictMode>
+      {/* Honour the OS "reduce motion" setting: framer drops transforms, keeps fades. */}
+      <MotionConfig reducedMotion="user">
       <ThemeProvider>
         <AuthProvider>
           <ToastProvider>
@@ -21,6 +24,7 @@ function render() {
           </ToastProvider>
         </AuthProvider>
       </ThemeProvider>
+      </MotionConfig>
     </StrictMode>,
   );
 }