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/Activity.tsx

@@ -101,8 +101,7 @@ export function Activity() {
 
   return (
     <div className="space-y-4">
-      <div className="flex items-center justify-between">
-        <h2 className="text-lg font-semibold">Activity</h2>
+      <div className="flex items-center justify-end">
         <Select value={filter} onValueChange={setFilter}>
           <SelectTrigger className="w-[140px] h-8 text-xs">
             <SelectValue placeholder="Filter by type" />
@@ -126,7 +125,7 @@ export function Activity() {
       )}
 
       {filtered && filtered.length > 0 && (
-        <div className="border border-border rounded-md divide-y divide-border">
+        <div className="border border-border divide-y divide-border">
           {filtered.map((event) => {
             const link = entityLink(event.entityType, event.entityId);
             return (