Update tagline to 'A living digital environment'

app.py

@@ -173,7 +173,7 @@ def build_ui():
               <div class="og-pill">MCP + Topology</div>
               <h2 style="font-family:'Playfair Display',serif; margin:6px 0 4px 0;">🌿 Overgrowth</h2>
               <p style="margin:0; font-size:15px; color:#0f4d3f;">
-                Autonomous network reliability agent — parses changes, simulates risk, diagnoses drift, and self-heals with MCP.
+                A living digital environment
               </p>
             </div>
             """,