Polish UI components and rework AgentConfigForm

Major AgentConfigForm rework with improved adapter configuration
fields and layout. Refine sidebar, breadcrumbs, and card/tab
components for visual consistency. Clean up page layouts across
Activity, Agents, Approvals, Costs, Dashboard, Goals, Inbox,
Issues, Org, and Projects pages. Minor heartbeat-run CLI fix.

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

ui/src/pages/Companies.tsx

@@ -89,11 +89,7 @@ export function Companies() {
 
   return (
     <div className="space-y-6">
-      <div className="flex items-center justify-between">
-        <div>
-          <h2 className="text-lg font-semibold">Companies</h2>
-          <p className="text-sm text-muted-foreground">Manage your companies.</p>
-        </div>
+      <div className="flex items-center justify-end">
         <Button size="sm" onClick={openOnboarding}>
           <Plus className="h-3.5 w-3.5 mr-1.5" />
           New Company