Prevent tab name text from being selectable (#67)

Add select-none to the tab container className, consistent with
how other interactive elements like dropdown menus are styled.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

ui/goose2/src/features/tabs/ui/TabBar.tsx

@@ -52,7 +52,7 @@ export function TabBar({
               }
             }}
             className={cn(
-              "group flex h-7 cursor-pointer items-center gap-1.5 rounded-md pl-3 pr-1.5 text-xs transition-colors",
+              "group flex h-7 cursor-pointer select-none items-center gap-1.5 rounded-md pl-3 pr-1.5 text-xs transition-colors",
               tab.id === activeTabId
                 ? "bg-background-secondary text-foreground"
                 : "text-foreground-secondary hover:bg-background-secondary/50 hover:text-foreground",