fix(dashboard): compact research decision history

apps/presentation/dashboard/src/features/personal-workspace/goal-research-history.css

@@ -207,7 +207,9 @@
 .research-trail-list { display: grid; gap: 0; margin: 0 0 0 8px; padding: 0 0 0 16px; border-left: 1px solid var(--pw-line); list-style: none; }
 .research-trail-list > li { position: relative; min-width: 0; }
 .research-trail-list > li::before { content: ""; position: absolute; top: 23px; left: -20px; width: 7px; height: 7px; border-radius: 50%; background: var(--pw-muted); box-shadow: 0 0 0 4px var(--pw-bg); }
-.research-history .research-trail-list button { display: flex; flex-direction: column; align-items: stretch; gap: 6px; width: 100%; min-height: 44px; padding: 12px; border: 0; border-radius: 6px; background: none; color: var(--pw-text); font: inherit; font-size: var(--text-body); line-height: var(--leading-prose); text-align: left; cursor: pointer; transition: background-color var(--motion-fast) var(--ease-standard); }
+.research-history .research-trail-list button { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 12px; width: 100%; min-height: 44px; padding: 12px; border: 0; border-radius: 6px; background: none; color: var(--pw-text); font: inherit; font-size: var(--text-body); line-height: var(--leading-prose); text-align: left; cursor: pointer; transition: background-color var(--motion-fast) var(--ease-standard); }
+.research-trail-main { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
+.research-trail-list button > svg { color: var(--pw-muted); }
 .research-history .research-trail-list button:hover { background: var(--pw-hover); }
 .research-history .research-trail-list button.is-selected { outline: 1px solid var(--pw-line-strong); }
 .research-trail-change { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; overflow-wrap: anywhere; }

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

@@ -1,5 +1,5 @@
 import {exploreFindingCopy} from "./explore-finding-copy";
-import {CircleHelp} from "lucide-react";
+import {ChevronRight, CircleHelp} from "lucide-react";
 import {useLayoutEffect, useRef, useState, type CSSProperties} from "react";
 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";
@@ -40,7 +40,7 @@ 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",
+    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", 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",
     ...findingCopy.labels, 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。",
@@ -50,7 +50,7 @@ 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 earlier records", moreQuestions: "Show more questions", records: "decision records", latestRecord: "Most recent record", unknownTime: "Unknown time", all: "Whole history",
+    trail: "Decision history", more: "Show earlier records", moreQuestions: "Show more questions", records: "decision records", 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",
     ...findingCopy.labels, 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.",
@@ -229,20 +229,26 @@ function TrailQuestion({group, copy, label, timeLabel, selectedIds, onSelect}: {
         {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) => {
+    <ol className="research-trail-list">{group.items.slice(0, limit).map(item => {
       const decision = item.sections!.decision!;
+      // Preview source text, never a generated title. Complete lists live in
+      // the same exact-finding reader used by every other history selection.
+      const previewKey = decision.changed.length ? "changed" : decision.stopped.length ? "stopped" : "retained";
       return <li key={item.event.event_id}>
         <button type="button" data-research-decision={item.event.event_id}
-          aria-label={`${label(decision.outcome)} · ${item.at === null ? copy.unknownTime : timeLabel(item.at)} · ${item.event.title}`}
+          aria-label={`${label(decision.outcome)} · ${item.at === null ? copy.unknownTime : timeLabel(item.at)} · ${label(item.event.status)} · ${item.event.title}`}
           className={selectedIds.includes(item.event.node_id) ? "is-selected" : ""}
           onClick={event => {event.currentTarget.focus({preventScroll: true}); onSelect(item.event.node_id, item.event.result_id);}}>
-          <span className="research-trail-meta"><b className={`research-outcome is-${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 className="research-trail-main">
+            <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>
+            </span>
+            {decision[previewKey].length ? <span className="research-trail-change"><em>{label(previewKey)}</em>{decision[previewKey].join("；")}</span> : null}
+            <span className="research-trail-meta">{(["changed", "stopped", "retained"] as const).map(key => decision[key].length
+              ? <span key={key}>{label(key)} {decision[key].length}</span> : null)}</span>
           </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}
+          <ChevronRight size={16} aria-hidden/>
         </button>
       </li>;
     })}</ol>

examples/personal-workspace-browser/research-history.mjs

@@ -128,9 +128,120 @@ runpy.run_path(sys.argv[0], run_name="__main__")
   } catch (failure) {await close(); throw failure;}
 }
 
+// Whole-page comparison pressure: repeated conditions must not bury the next
+// decision, while its exact original finding remains one keyboard action away.
+async function readDecisionTrail(browser) {
+  const directory = await mkdtemp(resolve(tmpdir(), "loopx-decision-reading-"));
+  const fixture = resolve(directory, "history.json");
+  execFileSync(resolveTestPython(), ["-c", `
+import json, sys
+from pathlib import Path
+from loopx.capabilities.explore.result_log import build_explore_node_event, build_explore_finding_event
+goal = 'synthetic-decision-reading'
+events = []
+for question in range(3):
+    node = f'question-{question}'
+    title = ['对照能否区分修复机制与额外运行时间，并支持下一轮选择？',
+             'Did the fixed-budget comparison support a different candidate?',
+             '新的证据是否改变了原问题的判断，哪些失败与未知仍需保留？'][question]
+    events.append(build_explore_node_event(goal_id=goal, node_id=node, title=title,
+        recorded_at='2026-01-01T00:00:00Z'))
+    for record in range(5):
+        changed = [] if question == 1 and record == 4 else [f'改用对照方案 {record}，先比较相同预算下的有效结果，再决定是否进入下一轮。' * 3]
+        stopped = [f'STOP {index}: 停止将局部测量直接当作原始目标收益；同一来源中的负结果仍保留。' * 3 for index in range(2)]
+        retained = [f'RETAIN {index}: 保留原始目标、固定预算、历史失败与未知原因，不能从代理改进推断完整任务通过。' * 3 for index in range(3)]
+        interpretation = 'Outcome: ' + ('no_change' if not changed else 'replan')
+        for key, values in [('changed', changed), ('stopped', stopped), ('retained', retained)]:
+            if values: interpretation += ' ' + key + ': ' + ' '.join('- ' + value for value in values)
+        summary = 'Input revision: synthetic-v1 Applicability: current Observation: OBSERVATION: 对照未检验完整任务收益。 Interpretation: ' + interpretation
+        assert len(summary) < 2000
+        events.append(build_explore_finding_event(goal_id=goal, node_id=node,
+            finding_id=f'decision-{question}-{record}', title=f'Comparison {question}, decision {record}',
+            summary=summary, status=['confirmed', 'refuted', 'tentative'][record % 3],
+            recorded_at=f'2026-01-0{question + 1}T0{record}:00:00Z'))
+Path(sys.argv[1]).write_text(json.dumps({'goal_id': goal, 'display_name': 'Synthetic decision reading', 'events': events}, ensure_ascii=False))
+`, fixture], {cwd: repoRoot});
+  let owner, page;
+  try {
+    owner = await startHistoryOwner(fixture);
+    page = await browser.newPage({viewport: {width: 1280, height: 900}});
+    await page.addInitScript(() => {if (!localStorage.getItem('loopx-pw-locale')) localStorage.setItem('loopx-pw-locale', 'zh-CN');});
+    await page.goto(`${owner.base}/chat/?goalId=${owner.goal_id}&view=research&statusUrl=%2Fstatus.json`, {waitUntil: 'domcontentloaded'});
+    const history = page.locator('.research-history');
+    await history.getByRole('status').filter({hasText: '18 / 18'}).waitFor();
+    const trail = history.locator('.research-trail');
+    const group = trail.locator('.research-trail-question').first();
+    assert.equal(await trail.locator('.research-trail-question').count(), 3);
+    assert.equal(await group.locator('[data-research-decision]').count(), 3);
+    assert.match(await group.locator('header').innerText(), /已反驳 2.*暂定结论 1|暂定结论 1.*已反驳 2/s);
+    await page.screenshot({path: resolve(outputDir, 'decision-trail-first-desktop.png'), animations: 'disabled'});
+    await trail.evaluate(e => e.scrollIntoView({block: 'start'}));
+    await page.screenshot({path: resolve(outputDir, 'decision-trail-desktop.png'), animations: 'disabled'});
+    await trail.locator('.research-trail-question').last().evaluate(e => e.scrollIntoView({block: 'start'}));
+    await page.screenshot({path: resolve(outputDir, 'decision-trail-lower-desktop.png'), animations: 'disabled'});
+    await page.setViewportSize({width: 390, height: 844});
+    await page.emulateMedia({reducedMotion: 'reduce'});
+    await trail.evaluate(e => e.scrollIntoView({block: 'start'}));
+    await page.screenshot({path: resolve(outputDir, 'decision-trail-phone.png'), animations: 'disabled'});
+    const rowsHeight = await group.locator('.research-trail-list').evaluate(e => e.getBoundingClientRect().height);
+    await writeFile(resolve(outputDir, 'decision-trail-reading.json'), JSON.stringify({rowsHeight}, null, 2));
+    assert(rowsHeight <= 500, `Three recent decisions must be comparable within one phone screen, rather than three repeated documents (${rowsHeight}px)`);
+    for (const locale of ['zh-CN', 'en']) {
+      await page.evaluate(value => localStorage.setItem('loopx-pw-locale', value), locale);
+      await page.reload({waitUntil: 'domcontentloaded'});
+      await history.getByRole('status').filter({hasText: '18 / 18'}).waitFor();
+      const row = group.locator('[data-research-decision]').first();
+      assert.match(await row.innerText(), locale === 'zh-CN' ? /停止 2.*保留 3/s : /Stopped 2.*Retained 3/s);
+      await row.scrollIntoViewIfNeeded();
+      await row.focus(); await row.press('Enter');
+      const detail = history.locator('.research-history-detail');
+      await detail.waitFor();
+      assert.equal(new URL(page.url()).searchParams.get('research_finding'), 'decision-2-4');
+      const original = detail.locator('.research-recorded-finding > .research-finding-sections');
+      assert.match(await original.innerText(), /OBSERVATION: 对照未检验完整任务收益/);
+      for (const text of ['STOP 0:', 'STOP 1:', 'RETAIN 0:', 'RETAIN 1:', 'RETAIN 2:']) assert((await original.innerText()).includes(text));
+      assert.equal(await original.locator('li').count(), 6, 'The exact reader keeps every changed, stopped and retained item');
+      if (locale === 'zh-CN') {
+        await page.screenshot({path: resolve(outputDir, 'decision-trail-reader-phone.png'), animations: 'disabled'});
+        await original.locator('dd').last().scrollIntoViewIfNeeded();
+        await page.screenshot({path: resolve(outputDir, 'decision-trail-reader-tail-phone.png'), animations: 'disabled'});
+      }
+      await detail.press('Escape');
+      assert(await row.evaluate(e => e === document.activeElement), 'Escape restores the exact decision control');
+      const returned = await row.boundingBox();
+      assert(returned.y >= 0 && returned.y + returned.height <= 844, 'Return brings the original decision back into the reading viewport');
+      const noChange = trail.locator('.research-trail-question').nth(1).locator('[data-research-decision]').first();
+      await noChange.click();
+      assert.equal(new URL(page.url()).searchParams.get('research_finding'), 'decision-1-4');
+      assert.match(await original.innerText(), /STOP 0:/, 'A decision with no changed list still has complete stopped and retained evidence');
+      await detail.press('Escape');
+      await group.getByRole('button', {name: locale === 'zh-CN' ? '显示更早记录 · 2' : 'Show earlier records · 2', exact: true}).click();
+      assert.equal(await group.locator('[data-research-decision]').count(), 5, 'Earlier decisions stay reachable');
+      const oldest = group.locator('[data-research-decision]').last();
+      await oldest.click();
+      assert.equal(new URL(page.url()).searchParams.get('research_finding'), 'decision-2-0');
+      await detail.press('Escape');
+      assert(await oldest.evaluate(e => e === document.activeElement));
+      if (locale === 'en') {
+        await trail.evaluate(e => e.scrollIntoView({block: 'start'}));
+        await page.screenshot({path: resolve(outputDir, 'decision-trail-english-phone.png'), animations: 'disabled'});
+      }
+      assert(await page.evaluate(() => document.documentElement.scrollWidth <= innerWidth + 1));
+    }
+    const readback = await (await page.request.get(`${owner.base}/fixture/readback`)).json();
+    assert.equal(readback.source_unchanged, true);
+    assert.equal(readback.mutation_attempts, 0, 'Reading and returning cannot perform a write');
+  } finally {
+    await page?.close();
+    await owner?.close();
+    await rm(directory, {recursive: true, force: true});
+  }
+}
+
 export const researchHistoryScenario = {
   id: "research-history",
   async run({browser, collectCoverage, url}) {
+    await readDecisionTrail(browser);
     // The ordinary journey uses the real source verifier and HTTP owner, with
     // no intercepted analysis response and no analysis process or Goal writes.
     const nativeOwner = await startHistoryOwner(resolve(repoRoot, "apps/presentation/dashboard/src/data/fixtures/research-native-readback.json"));