fix(web-probe): accept stdin prompts for observe commands (#724)

Co-authored-by: Codex <codex@noreply.local>

scripts/src/hwlab-node-help.ts

@@ -79,6 +79,7 @@ export function hwlabNodeWebProbeHelp(): Record<string, unknown> {
       "bun scripts/cli.ts hwlab nodes web-probe observe command webobs-xxxx --type newSession",
       "bun scripts/cli.ts hwlab nodes web-probe observe command webobs-xxxx --type selectProvider --provider codex-api",
       "bun scripts/cli.ts hwlab nodes web-probe observe command webobs-xxxx --type sendPrompt --text 'ping'",
+      "bun scripts/cli.ts hwlab nodes web-probe observe command webobs-xxxx --type sendPrompt --text-stdin <<'EOF'\nlong prompt\nEOF",
       "bun scripts/cli.ts hwlab nodes web-probe observe status webobs-xxxx",
       "bun scripts/cli.ts hwlab nodes web-probe observe analyze webobs-xxxx",
       "bun scripts/cli.ts hwlab nodes web-probe script --node D601 --lane v03 <<'JS'\nexport default async ({ waitWorkbenchReady, fetchJson, fetchApiMatrix, recordStep, collectText, safeEvaluate, screenshot }) => {\n  const ready = await waitWorkbenchReady();\n  const workspace = await fetchJson('/v1/workbench/workspace?projectId=prj_hwpod_workbench');\n  const apiMatrix = await fetchApiMatrix(['/v1/workbench/workspace?projectId=prj_hwpod_workbench', '/auth/session']);\n  const workspaceText = await collectText('#workspace');\n  const evaluated = await safeEvaluate(({ a, b }) => ({ sum: a + b }), { a: 1, b: 2 });\n  await screenshot('workbench.png');\n  recordStep('workbench-summary', { finalUrl: ready.finalUrl, workspaceOk: workspace.ok, apiMatrixOk: apiMatrix.ok });\n  return { finalUrl: ready.finalUrl, workspaceOk: workspace.ok, workspaceText, evaluated };\n};\nJS",
@@ -93,7 +94,7 @@ export function hwlabNodeWebProbeHelp(): Record<string, unknown> {
       "Issue-ready evidence is available under issueEvidence and summary.issueEvidence; full script report is persisted under probe.reportPath with a SHA-256 fingerprint.",
       "observe sampling is passive by default: it records DOM summaries and natural page request/response/requestfailed events with observerInitiated=false; it does not actively fetch Workbench APIs, reload, switch sessions, route/intercept, or call repair helpers.",
       "observe start registers a local UniDesk-side observer id under .state/web-observe/index.json; after start, prefer observe status|command|stop|collect|analyze <id> instead of repeating --node/--lane/--state-dir.",
-      "observe command actions are explicit user/control actions and are appended to control.jsonl; use --type newSession/selectProvider/sendPrompt/goto/screenshot/mark/stop and keep prompt text out of issue comments by citing textHash/textBytes.",
+      "observe command actions are explicit user/control actions and are appended to control.jsonl; use --type newSession/selectProvider/sendPrompt/goto/screenshot/mark/stop. For long prompts use sendPrompt --text-stdin; keep prompt text out of issue comments by citing textHash/textBytes.",
       "observe analyze is offline-only: it reads artifact JSONL and writes analysis/report.md plus analysis/report.json without accessing Workbench APIs or driving the browser.",
       "observe analyze scans every sampled DOM point, extracts Workbench timing text such as 总耗时/total and 最近 N 秒/分前, and writes a sample point vs turn timing report: each Markdown table row starts with the timestamp, followed by each turn's 总耗时(s) and 最近更新(s). Timing series are reported for post-processing/manual analysis instead of auto-judged from status tail output.",
       "observe analyze also reports visible “加载中” count, owner attribution, concurrent loading owners, and continuous visible segments; fixes must reduce real loading latency, not reveal incomplete content early to make this metric disappear.",