Enhance typing animation and background interaction with subtle new elements

Speed up the typing animation, introduce click-based ripple effects on the background dots, and replace the "how it works" link with a minimal "-h" flag and a faint byline.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 6def8112-39d2-4641-b93b-f39108179f33
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: 6dcd9377-c004-4fa1-82a2-b1e55f7e9e41
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/42ae33dd-8759-4196-85a5-434465c72ece/6def8112-39d2-4641-b93b-f39108179f33/iilSvgd
Replit-Helium-Checkpoint-Created: true

index.html

@@ -21,10 +21,11 @@
           </svg>
         </button>
       </div>
-
-      <a href="/docs.html" class="docs-link">how it works &rarr;</a>
     </main>
 
+    <a href="/docs.html" class="help-flag" id="helpFlag" aria-label="how it works">-h</a>
+    <span class="byline" id="byline">// vibe coded to present human code</span>
+
     <script type="module" src="/src/main.ts"></script>
   </body>
 </html>