Update website: Rich TUI → Textual references

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Gregg Cochran

site/index.html

@@ -785,7 +785,7 @@ <h4>🎨 Dashboard Renderer</h4>
       <span class="arch-arrow">→<span class="arch-particle" style="animation-delay:.4s"></span><span class="arch-particle" style="animation-delay:1s"></span><span class="arch-particle" style="animation-delay:1.6s"></span></span>
       <div class="arch-box">
         <h4>🖥️ Terminal Output</h4>
-        <p>Rich TUI display</p>
+        <p>Textual TUI display</p>
       </div>
     </div>
   </div>
@@ -1297,7 +1297,7 @@ <h2 class="section-title glow-green">Up and Running in 30 Seconds</h2>
   var subtitles=[
     'Track your agents in real time',
     'Sparklines \u00b7 Heatmaps \u00b7 Velocity metrics',
-    'Powered by Python + Rich TUI',
+    'Powered by Python + Textual',
   ];
   var typedTextEl=document.getElementById('typedText');
   var subIdx2=0,subCharIdx2=0,subDeleting=false,subPauseFrames=0;