fix: reduce DirectTerminal scroll speed for smoother experience

Lower scrollSensitivity from 1 to 0.5 and fastScrollSensitivity
from 3 to 1.5 based on user feedback that scrolling was too fast.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/web/src/components/DirectTerminal.tsx

@@ -120,8 +120,8 @@ export function DirectTerminal({
           scrollback: 10000,
           allowProposedApi: true,
           fastScrollModifier: "alt",
-          fastScrollSensitivity: 3,
-          scrollSensitivity: 1,
+          fastScrollSensitivity: 1.5,
+          scrollSensitivity: 0.5,
         });
 
         // Add FitAddon for responsive sizing