Quick polish pass on remaining screens; hide legacy chrome on RUM tab

Normalize radii, drop shadows/blur and font-black, and document the
one-view-at-a-time plan in AGENTS.md.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

otel-ui/src/components/RolloutsVisualizer.tsx

@@ -30,7 +30,7 @@ export function RolloutsVisualizer() {
   if (loading && rollouts.length === 0) return <div className="py-16 text-center text-sm text-ds-text-3">Loading cluster rollouts…</div>
   return <div className="space-y-4">
     <div className="flex flex-wrap items-center gap-3 border-b border-ds-line pb-3">
-      <div><div className="flex items-center gap-2 text-[10px] font-black uppercase tracking-[0.2em] text-ds-text-3"><CloudCog className="h-3 w-3 text-ds-accent" /> Cluster Rollouts</div><div className="mt-1 text-xs text-ds-text-3">Read-only Kubernetes deployment state with optional Prometheus impact data.</div></div>
+      <div><div className="flex items-center gap-2 text-[10px] font-bold uppercase tracking-[0.2em] text-ds-text-3"><CloudCog className="h-3 w-3 text-ds-accent" /> Cluster Rollouts</div><div className="mt-1 text-xs text-ds-text-3">Read-only Kubernetes deployment state with optional Prometheus impact data.</div></div>
       <button onClick={() => void refresh()} className="ml-auto inline-flex items-center gap-2 rounded-lg border border-ds-line px-3 py-2 text-[10px] font-bold uppercase tracking-wider text-ds-text-2 hover:text-ds-text"><RefreshCw className="h-3 w-3" /> Refresh</button>
     </div>
     {error && <div className="rounded-lg border border-ds-warn/20 bg-ds-warn-bg p-3 text-xs text-ds-warn">Rollout watcher unavailable: {String(error)}</div>}