Preserve rich ACP inputs and activity through runner and UI

Bind provider extensions to active turns, drain activity before settlement, preserve complete plan decisions, and expose bounded provider notice details. Keep new harness choices disabled until qualification.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

ui/src/components/transcript/RunTranscriptView.tsx

@@ -879,6 +879,7 @@ function TranscriptProviderActivity({ block, density }: { block: Extract<Transcr
       {children.length > 0 ? <ul className="space-y-1">{children.map((child, index) => <li key={String(child.childId ?? index)}><strong>{String(child.role ?? "Child agent")}</strong> · {String(child.status ?? "unknown")}<div className="text-muted-foreground">{String(child.summary ?? "")}</div></li>)}</ul> : null}
       {sources.length > 0 ? <ul className="space-y-1">{sources.map((source, index) => { const url = typeof source.url === "string" && /^https?:\/\//.test(source.url) ? source.url : null; return <li key={String(source.sourceId ?? index)}>{url ? <a className="underline" href={url} target="_blank" rel="noreferrer">{String(source.title ?? url)}</a> : String(source.title ?? "Unavailable source")} <span className="text-muted-foreground">Provider-reported</span></li>; })}</ul> : null}
       {output ? <pre className="max-h-64 overflow-auto whitespace-pre-wrap rounded bg-background p-2 font-mono">{output}</pre> : null}
+      {block.family === "provider_notice" && Array.isArray(block.payload.details) ? <dl className="space-y-1">{block.payload.details.slice(0, 64).map((value, index) => { const detail = asRecord(value); return detail && typeof detail.name === "string" && typeof detail.value === "string" ? <div key={index}><dt className="text-muted-foreground">{detail.name}</dt><dd className="whitespace-pre-wrap break-words">{detail.value}</dd></div> : null; })}</dl> : null}
       {block.family === "model_identity" ? <div><span className="text-muted-foreground">Requested</span> {String(block.payload.requestedModel ?? "—")} · <span className="text-muted-foreground">Effective</span> {String(block.payload.effectiveModel ?? "—")}</div> : null}
     </div> : null}
   </div>;