feat(machine): add kiosk touch targets and viewport for 1920px

Scale up button sizes (kiosk, kiosk-lg, kiosk-icon variants), add
active:scale feedback, set viewport to 1920px fixed width, hide cursor,
and bump card title/description sizes for touch-screen readability.

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

apps/machine/index.html

@@ -3,13 +3,15 @@
   <head>
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/vite.svg" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="viewport" content="width=1920, initial-scale=1.0, user-scalable=no" />
     <title>Lamassu ATM</title>
     <style>
       /* Prevent text selection and context menu on kiosk */
       * {
         user-select: none;
         -webkit-user-select: none;
+        touch-action: manipulation;
+        -webkit-tap-highlight-color: transparent;
       }
       html,
       body {
@@ -17,6 +19,7 @@
         padding: 0;
         overflow: hidden;
         background: #000;
+        cursor: none;
       }
     </style>
   </head>