fix(runner): prevent narrow console overflow

Allow the shared mode switch to wrap so the live console and recovery diagnostics retain WCAG reflow at a 390-pixel viewport.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/paperclip-runner/devtools/browser/src/styles.css

@@ -118,6 +118,7 @@ p {
 }
 
 .mode-switch {
+  flex-wrap: wrap;
   margin-bottom: var(--space-6);
 }