feat(runner): add rich ACP transport and durable interaction foundation (#14430)

Add shared rich ACP transport, durable questions and permissions, verified provider packaging, and bounded activity and plan presentation. Keep Cursor, Copilot, and Pi pending their separate provider qualification.

Persist interaction settlement before publication, fence failed writes until fresh recovery, and preserve owned-process cleanup. Incorporate reviewed mainline integration with extended harness coverage.

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>;