Revise notification pill per reopened #168: short text, smaller, side placement

- Pill now reads only 'Paste Created' (no combined 'Paste Created - Link Copied')
- Copy fallback toast now says 'Link Copied'
- Pill shrunk (smaller padding/font) and anchored tighter to the right side

Fixes #168

internal/web/static/paste.js

@@ -25,7 +25,7 @@ function copyContent(btn) {
     clearTimeout(btn._okh);
     btn._okh = setTimeout(() => { btn.classList.remove('ok'); btn.textContent = 'copy'; }, 2000);
   } else {
-    toast('Copied', 'success');
+    toast('Link Copied', 'success');
   }
 }
 function redeem() {