fix(research): show successive decisions under their question

apps/presentation/dashboard/src/features/personal-workspace/goal-research-timeline.tsx

@@ -1,7 +1,7 @@
 import {CircleHelp} from "lucide-react";
 import {useLayoutEffect, useRef, useState, type CSSProperties} from "react";
-import type {ExploreTimeline, TimelineFinding, TimelineNode, TimelinePhase} from "../../../../../../loopx/control_plane/presentation/explore_timeline.js";
-import {exploreTimelinePhaseAt, groupExploreTimelinePoints, selectExploreTimelineDecisions} from "../../../../../../loopx/control_plane/presentation/explore_timeline.js";
+import type {ExploreTimeline, TimelineNode, TimelinePhase} from "../../../../../../loopx/control_plane/presentation/explore_timeline.js";
+import {exploreTimelinePhaseAt, groupExploreTimelinePoints, groupExploreTimelineDecisions} from "../../../../../../loopx/control_plane/presentation/explore_timeline.js";
 import type {groupUnlinkedHistoryQuestions} from "../../../../../../loopx/control_plane/presentation/explore_history.js";
 import {ContextHelp} from "./context-help";
 
@@ -38,7 +38,7 @@ export function GoalResearchTimeline({timeline, zh, selectedIds, selectedDay, da
     unstructured: "决策未结构化", unstructuredHint: "结论未按 writeback 结构记录，无法拆出依据与决策。",
     density: "记录密度", densityHint: "柱高为事件数；浅红为无记录空档", ticks: "转向 / 继续",
     routes: "研究路线", routeHint: "仅由显式关联或父子分组相连", singles: "未关联研究项",
-    trail: "决策轨迹", more: "显示更多决策", all: "全部时段",
+    trail: "决策轨迹", more: "显示更早记录", moreQuestions: "显示更多问题", records: "条决策记录", latestRecord: "最近记录", unknownTime: "时间未知", all: "全部时段",
     span: "记录跨度", start: "起点", end: "末端", replan: "转向", continue: "继续", stop: "停止", wait: "等待", no_change: "无变化", ask_human: "请人决定",
     confirmed: "来源记为确认", refuted: "已反驳", tentative: "待检查", unlabeled: "无结论", phaseNote: "按记录时间三等分，仅为阅读分组，不是预声明的评估窗口。",
     noTime: "没有可用的记录时间，无法放上时间轴；下方记录仍可完整阅读。",
@@ -48,7 +48,7 @@ export function GoalResearchTimeline({timeline, zh, selectedIds, selectedDay, da
     unstructured: "Unstructured decisions", unstructuredHint: "Findings were not recorded in writeback sections; evidence and decisions cannot be separated.",
     density: "Recording density", densityHint: "Bar height is events; pale red is a recording gap", ticks: "Replan / continue",
     routes: "Research routes", routeHint: "Connected only by recorded relationships or parent grouping", singles: "Unlinked research items",
-    trail: "Decision history", more: "Show more decisions", all: "Whole history",
+    trail: "Decision history", more: "Show earlier records", moreQuestions: "Show more questions", records: "decision records", latestRecord: "Most recent record", unknownTime: "Unknown time", all: "Whole history",
     span: "Recorded span", start: "Start", end: "End", replan: "Replan", continue: "Continue", stop: "Stop", wait: "Wait", no_change: "No change", ask_human: "Ask human",
     confirmed: "Recorded confirmation", refuted: "Refuted", tentative: "Tentative", unlabeled: "No finding", phaseNote: "Equal thirds of record time, for reading only; not a pre-declared evaluation window.",
     noTime: "No usable record time; the history cannot be placed on a time axis. All records remain readable below.",
@@ -82,7 +82,7 @@ export function GoalResearchTimeline({timeline, zh, selectedIds, selectedDay, da
       className={`research-timeline-marker is-cluster${selected ? " is-selected" : ""}${group.items.some(item => inPhase(item.first)) ? "" : " is-dimmed"}`}
       style={{left: pct(group.at)}} onClick={() => onSelectMany(ids)}><span>{ids.length}</span></button>;
   });
-  const trail = selectExploreTimelineDecisions(timeline, phase);
+  const trail = groupExploreTimelineDecisions(timeline, phase);
   const decisionOutcomes = [...new Set(timeline.decisions.map(item => item.sections!.decision!.outcome))];
   const groupedIds = new Set(dayGroups.flatMap(group => group.nodes.map(node => node.id)));
   const swarm = timeline.singles.filter(id => !groupedIds.has(id)).map(id => timeline.nodes.get(id)!).filter(item => item.first !== null);
@@ -112,7 +112,7 @@ export function GoalResearchTimeline({timeline, zh, selectedIds, selectedDay, da
       <p>{copy.phaseNote}</p><p>{copy.densityHint}{zh ? "。" : ". "}{zh ? "无记录空档不代表研究停止。" : "A recording gap does not establish that research stopped."}</p>
       {!timeline.structuredCount ? <p>{copy.unstructuredHint}</p> : null}
       <p>{copy.routeHint}{zh ? "。" : ". "}{zh ? "相邻点合拢，数字为研究项数，一次展开原始时间与依据。" : "Nearby points group; the number counts research items. Select once for original times and sources."}</p>
-      <p>{zh ? "未关联问题按首次记录 UTC 日期收纳，不推断路线或因果。决策轨迹保留各轮显式决策，最新记录在前。" : "Unlinked questions group by first-record UTC date, without inferring a route or cause. Decision history retains each explicit decision, newest record first."}</p>
+      <p>{zh ? "未关联问题按首次记录 UTC 日期收纳，不推断路线或因果。决策轨迹按研究问题归组，组内保留各轮显式决策，最近记录在前；同名问题不会自动合并。" : "Unlinked questions group by first-record UTC date, without inferring a route or cause. Decision history groups explicit decisions by question, newest record first; matching titles do not merge questions."}</p>
       <dl className="research-phase-details">{timeline.phases.map(item => <div key={item.index}><dt>{phaseName(item)}</dt><dd>{phaseDescription(item)}</dd></div>)}</dl>
     </ContextHelp>{phase !== null ? <button type="button" className="research-link" onClick={() => onPhase(null)}>{copy.all}</button> : null}</div>
       <span className="research-phase-legend">{LABELS.map(key => <span key={key}><i className={tone(key)} aria-hidden="true"/>{label(key)}</span>)}</span>
@@ -193,23 +193,57 @@ export function GoalResearchTimeline({timeline, zh, selectedIds, selectedDay, da
     <section className="research-trail" aria-label={copy.trail}>
       <h3>{copy.trail}</h3>
       {!timeline.decisions.length ? <ContextHelp label={zh ? "暂无结构化决策记录" : "No structured decision records"} icon={CircleHelp}><p className="research-history-note">{timeline.structuredCount ? copy.none : copy.unstructured}</p></ContextHelp>
-        : <TrailList items={trail} copy={copy} label={label} timeLabel={timeLabel} selectedIds={selectedIds} onSelect={onSelect}/>}
+        : <TrailList groups={trail} copy={copy} label={label} timeLabel={timeLabel} selectedIds={selectedIds} onSelect={onSelect}/>}
     </section>
   </div>;
 }
 
-function TrailList({items, copy, label, timeLabel, selectedIds, onSelect}: {items: TimelineFinding[]; copy: Copy; label: (key: string) => string; timeLabel: (value: number) => string; selectedIds: readonly string[]; onSelect: (id: string, finding?: string) => void}) {
+function TrailList({groups, copy, label, timeLabel, selectedIds, onSelect}: {
+  groups: ReturnType<typeof groupExploreTimelineDecisions>; copy: Copy; label: (key: string) => string;
+  timeLabel: (value: number) => string; selectedIds: readonly string[]; onSelect: (id: string, finding?: string) => void;
+}) {
   const [limit, setLimit] = useState(3);
   return <>
-    <ol className="research-trail-list">{items.slice(0, limit).map(item => {
+    <ol className="research-trail-groups">{groups.slice(0, limit).map(group => <TrailQuestion key={group.id}
+      group={group} copy={copy} label={label} timeLabel={timeLabel} selectedIds={selectedIds} onSelect={onSelect}/>)}</ol>
+    {groups.length > limit ? <button type="button" className="research-link" onClick={() => setLimit(value => value + 6)}>{copy.moreQuestions} · {groups.length - limit}</button> : null}
+  </>;
+}
+
+function TrailQuestion({group, copy, label, timeLabel, selectedIds, onSelect}: {
+  group: ReturnType<typeof groupExploreTimelineDecisions>[number]; copy: Copy; label: (key: string) => string;
+  timeLabel: (value: number) => string; selectedIds: readonly string[]; onSelect: (id: string, finding?: string) => void;
+}) {
+  const [limit, setLimit] = useState(3);
+  const knownTimes = group.items.flatMap(item => item.at === null ? [] : [item.at]);
+  const exceptions = LABELS.filter(status => status !== "confirmed")
+    .map(status => ({status, count: group.items.filter(item => item.event.status === status).length})).filter(item => item.count);
+  return <li className="research-trail-question">
+    <header>
+      <h4>{group.title}</h4>
+      <div className="research-trail-meta"><span>{group.items.length} {copy.records}</span>
+        {knownTimes.length ? <span>{timeLabel(knownTimes.at(-1)!)}{knownTimes.length > 1 ? ` — ${timeLabel(knownTimes[0]!)}` : ""}</span> : null}
+        {knownTimes.length < group.items.length ? <span>{copy.unknownTime} · {group.items.length - knownTimes.length}</span> : null}
+        {exceptions.map(({status, count}) => <span className={tone(status)} key={status}>{label(status)} {count}</span>)}
+      </div>
+    </header>
+    <ol className="research-trail-list">{group.items.slice(0, limit).map((item, index) => {
       const decision = item.sections!.decision!;
       return <li key={item.event.event_id}>
-        <button type="button" aria-pressed={selectedIds.includes(item.event.node_id)} className={selectedIds.includes(item.event.node_id) ? "is-selected" : ""} onClick={() => onSelect(item.event.node_id, item.event.result_id)}>
-          <span className="research-trail-meta"><b className={`research-outcome is-${decision.outcome}`}>{label(decision.outcome)}</b><time>{item.at !== null ? timeLabel(item.at) : ""}</time><span>{label(item.event.status)}</span></span>
-          <strong>{item.event.title}</strong>
-          <span><em>{copy.changed}</em>{decision.changed.join("；") || "—"}</span>
-        </button></li>;
+        <button type="button" data-research-decision={item.event.event_id}
+          aria-label={`${label(decision.outcome)} · ${item.at === null ? copy.unknownTime : timeLabel(item.at)} · ${item.event.title}`}
+          className={selectedIds.includes(item.event.node_id) ? "is-selected" : ""}
+          onClick={event => {event.currentTarget.focus({preventScroll: true}); onSelect(item.event.node_id, item.event.result_id);}}>
+          <span className="research-trail-meta"><b className={`research-outcome is-${decision.outcome}`}>{label(decision.outcome)}</b>
+            <time dateTime={item.at === null ? undefined : item.event.recorded_at}>{item.at === null ? copy.unknownTime : timeLabel(item.at)}</time>
+            <span>{label(item.event.status)}</span>{index === 0 && item.at !== null ? <span>{copy.latestRecord}</span> : null}
+          </span>
+          {decision.changed.length ? <span className="research-trail-change"><em>{copy.changed}</em>{decision.changed.join("；")}</span> : null}
+          {decision.stopped.length ? <span className="research-trail-change"><em>{copy.stopped}</em>{decision.stopped.join("；")}</span> : null}
+          {decision.retained.length ? <span className="research-trail-change"><em>{copy.retained}</em>{decision.retained.join("；")}</span> : null}
+        </button>
+      </li>;
     })}</ol>
-    {items.length > limit ? <button type="button" className="research-link" onClick={() => setLimit(value => value + 6)}>{copy.more} · {items.length - limit}</button> : null}
-  </>;
+    {group.items.length > limit ? <button type="button" className="research-link" onClick={() => setLimit(value => value + 6)}>{copy.more} · {group.items.length - limit}</button> : null}
+  </li>;
 }

docs/development/design.md

@@ -193,6 +193,14 @@ keep all findings selectable and failed or tentative counts visible. Preserve
 the exact finding on reload and Back. Offer the whole recorded history in place
 and through the existing return action, without letting it bury the chosen text.
 
+Decision history groups records by their recorded question identity, with the
+question title once above its successive decisions. Matching titles alone do
+not establish shared identity or decision revision. Show recent records first,
+with their outcome, change and recorded status; retain stopped/retained evidence
+and expose earlier records in place. Counts and date spans describe the selected
+time range. Keep negative and tentative record counts visible when older rows
+are folded, and open each row's exact finding in the existing reader.
+
 Route captions distinguish start and end and wrap as readable entries. If a
 long title is clamped in that list, one activation opens its complete original
 in the existing reader; keyboard return restores the exact entry. Keep view,