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/templates/paste.html

@@ -34,7 +34,7 @@
     </div>
   </div>
   {{if .JustCreated}}
-  <div class="created-pill" id="created-pill" role="status">Paste Created · Link Copied</div>
+  <div class="created-pill" id="created-pill" role="status">Paste Created</div>
   {{end}}
   {{if .Attachment}}
   <div class="float">