feat(ui): active agents panel, sidebar context, and page enhancements

Add live ActiveAgentsPanel with real-time transcript feed, SidebarContext
for responsive sidebar state, agent config form with reasoning effort,
improved inbox with failed run alerts, enriched issue detail with project
picker, and various component refinements across pages.

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

ui/src/components/GoalTree.tsx

@@ -27,7 +27,7 @@ function GoalNode({ goal, children, allGoals, depth, onSelect }: GoalNodeProps)
         className={cn(
           "flex items-center gap-2 px-3 py-1.5 text-sm transition-colors cursor-pointer hover:bg-accent/50",
         )}
-        style={{ paddingLeft: `${depth * 20 + 12}px` }}
+        style={{ paddingLeft: `${depth * 16 + 12}px` }}
         onClick={() => onSelect?.(goal)}
       >
         {hasChildren ? (