Remove overflow-y scroll from textarea input

This improves the textarea behavior by removing the automatic scrollbar.

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

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

app.py

@@ -103,6 +103,7 @@ textarea, input {
     background: rgba(30, 58, 95, 0.6) !important;
     color: white !important;
     border-color: rgba(255, 255, 255, 0.2) !important;
+    overflow-y: visible !important;
 }
 textarea::placeholder {
     color: rgba(255, 255, 255, 0.5) !important;