refactor: Archive tufte dashboard and make comprehensive dashboard primary

- Moved tufte_dashboard.html to static/archive/ directory
- Updated index.html to link to the comprehensive dashboard (dashboard.html)
- Changed link text and description to reflect comprehensive dashboard features
- The comprehensive dashboard already shows v2.8.2 with full feature set

This establishes dashboard.html as the primary dashboard interface.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: raold

index.html

@@ -772,9 +772,9 @@ <h4>🎨 Graph Visualization Demo</h4>
                     <p>Interactive D3.js knowledge graphs with natural language</p>
                 </a>
 
-                <a href="tufte_dashboard.html" class="link-card">
-                    <h4>📊 Development Dashboard</h4>
-                    <p>Detailed development metrics and Tufte-style analytics</p>
+                <a href="dashboard.html" class="link-card">
+                    <h4>📊 Comprehensive Dashboard</h4>
+                    <p>Full-featured dashboard with real-time metrics and visualizations</p>
                 </a>
 
                 <a href="https://github.com/raold/second-brain/tree/main/tests" class="link-card">