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/PropertiesPanel.tsx

@@ -9,7 +9,7 @@ export function PropertiesPanel() {
   if (!panelContent) return null;
 
   return (
-    <aside className="w-80 border-l border-border bg-card flex flex-col shrink-0">
+    <aside className="hidden md:flex w-80 border-l border-border bg-card flex-col shrink-0">
       <div className="flex items-center justify-between px-4 py-2 border-b border-border">
         <span className="text-sm font-medium">Properties</span>
         <Button variant="ghost" size="icon-xs" onClick={closePanel}>