Add cockpit reader view and evidence panel (I3)

Why: implement the reviewed I3 increment - continuous body reading with
per-section status lines, version summary with collapsed line-diff (backend
versions projection from RDM PR #420), right evidence panel with
sources/history/impacts/conflicts tabs, panorama-reader positioning on the
shared selection, per user+project view preferences (panorama/reader,
density, panel tab), strict-seq history merging and honest restricted states.

Evidence: 10 new pure-logic tests (prefs validation, version summary and
diff marks, strict history merge drops, reader assembly three-state); vitest
324/324 green; tsc and vite build green; tokens-only styles.

Impact: cockpit-only; no fourth column, no standalone graph (relations stay
in the right panel); reader entry is explicit (panorama button / view toggle).

Refs: rollout I3

src/components/CockpitReader.tsx

@@ -0,0 +1,254 @@
+// 文档驾驶舱 I3：阅读器（连续正文 + 版本摘要/差异折叠）与右侧依据/影响面板。
+// 消费 I1/I3 命令面 rdm.cockpit.node(+versions)/node.history（Dev 仓 docs/superpowers
+// specs 2026-10-16 view-spec §5–§6）。不新增第四栏：右栏是选中节点的同一依据面，
+// 全景与阅读器共享 selectedNodeRef；面板刷新原位进行，不抢占滚动位置（DV-R05/§5）。
+// 折叠只用 @ui Collapsible；颜色/字号只消费 @ui/tokens.css。
+import { useCallback, useEffect, useRef, useState } from 'react'
+import { api } from '../api'
+import { Collapsible, EmptyState } from '@ui'
+import {
+  assembleReader, diffLines, historyLine, mergeHistoryStrict, versionSummary,
+  PANEL_TABS, type CockpitContentBlock, type CockpitHistorySummary,
+  type CockpitMeta, type CockpitNodeRef, type CockpitTreeNode,
+  type CockpitVersionSummary, type Density, type PanelTabId,
+} from '../documentCockpit'
+
+export interface ReaderSelection { ref: CockpitNodeRef; parentDocId?: string }
+
+interface NodeDetailShape {
+  meta: CockpitMeta
+  node: CockpitTreeNode
+  body?: CockpitContentBlock[]
+  children: CockpitTreeNode[]
+  sources: { items: any[] }
+  history: { items: CockpitHistorySummary[]; hasMore: boolean; nextCursor?: string }
+  impacts: { items: any[] }
+  conflicts: { items: any[] }
+  versions?: CockpitVersionSummary[]
+}
+
+function useNodeDetail(pid: string, sel?: CockpitNodeRef) {
+  const [detail, setDetail] = useState<NodeDetailShape | null>(null)
+  const [err, setErr] = useState('')
+  const gen = useRef(0)
+  useEffect(() => {
+    const g = ++gen.current
+    setDetail(null); setErr('')
+    if (!sel) return
+    api.rdmCommand<any>('rdm.cockpit.node', { projectId: pid, kind: sel.kind, id: sel.id })
+      .then(d => { if (g === gen.current) setDetail(d) })
+      .catch(e => { if (g === gen.current) setErr(e.message) })
+    return () => { gen.current++ }
+  }, [pid, sel?.kind, sel?.id])
+  return { detail, err }
+}
+
+/** 版本块：当前版本 + 前一版本摘要；完整差异（行级标记）折叠。受限只给元数据。 */
+export function VersionBlock({ versions, density }: { versions?: CockpitVersionSummary[]; density: Density }) {
+  if (!versions || versions.length === 0) return null
+  const { current, previous, redacted } = versionSummary(versions)
+  if (redacted || !current || current.content === undefined) {
+    return <div className="empty-note">版本受限（仅元数据可见）</div>
+  }
+  const prev = previous && previous.content !== undefined ? previous : undefined
+  return (
+    <Collapsible
+      id={`cockpit-versions-${current.version}`}
+      trigger={<span className="cockpit-versions-toggle">版本 {current.version}{previous ? `（前一版 ${previous.version}）` : '（首版）'}与完整差异</span>}
+    >
+      <div className={`cockpit-versions cockpit-density-${density}`}>
+        {prev ? (
+          <>
+            <div className="cockpit-versions-head">当前 {current.version} · {current.actor || '未知'} · {new Date(current.at).toLocaleString('zh-CN')}</div>
+            <pre className="cockpit-diff">
+              {diffLines(current.content || '', prev.content || '').map((l, i) => (
+                <div key={i} className={`cockpit-diff-${l.flag === '=' ? 'same' : l.flag === '+' ? 'add' : 'del'}`}>{l.flag} {l.text}</div>
+              ))}
+            </pre>
+            <div className="cockpit-versions-head">前一版 {prev.version} · {prev.actor || '未知'} · {new Date(prev.at).toLocaleString('zh-CN')}</div>
+          </>
+        ) : (
+          <div className="cockpit-versions-head">首版 · {current.actor || '未知'} · {new Date(current.at).toLocaleString('zh-CN')}</div>
+        )}
+      </div>
+    </Collapsible>
+  )
+}
+
+/** 阅读器中栏：选中章节=该节连续正文+版本块；选中文档=全章节连续装配（每节详情按需拉取）。 */
+export function CockpitReader({ pid, selection, sections, density, onBack }: {
+  pid: string
+  selection: ReaderSelection
+  sections: CockpitTreeNode[]
+  density: Density
+  onBack: () => void
+}) {
+  const { detail, err } = useNodeDetail(pid, selection.ref)
+  const isSection = selection.ref.kind === 'section'
+  const [sectionDetails, setSectionDetails] = useState<Record<string, NodeDetailShape | undefined>>({})
+  const gen = useRef(0)
+  // 文档阅读器：按树顺序装配全部章节详情（上限 20；失败章节给受限占位不拖垮整篇）。
+  useEffect(() => {
+    if (isSection || selection.ref.kind !== 'document') return
+    const g = ++gen.current
+    const list = sections.slice(0, 20)
+    setSectionDetails({})
+    for (const sec of list) {
+      api.rdmCommand<any>('rdm.cockpit.node', { projectId: pid, kind: 'section', id: sec.ref.id })
+        .then(d => { if (g === gen.current) setSectionDetails(prev => ({ ...prev, [sec.ref.id]: d })) })
+        .catch(() => { if (g === gen.current) setSectionDetails(prev => ({ ...prev, [sec.ref.id]: undefined })) })
+    }
+    return () => { gen.current++ }
+  }, [pid, isSection, selection.ref.id, sections])
+  const anchorRef = useRef<HTMLDivElement | null>(null)
+  useEffect(() => { anchorRef.current?.scrollIntoView({ block: 'start' }) }, [selection.ref.id])
+  if (err) return <EmptyState icon="alert">阅读器加载失败：{err}</EmptyState>
+  return (
+    <div className={`cockpit-reader cockpit-density-${density}`}>
+      <div className="cockpit-nodehead" ref={anchorRef}>
+        <button type="button" className="cockpit-back" onClick={onBack}>← 返回全景</button>
+        <span className="cockpit-nodetitle">{detail?.node?.title || (isSection ? '章节' : '文档')}</span>
+      </div>
+      {isSection && detail && (
+        <>
+          {renderBody(detail.body, detail.meta)}
+          <VersionBlock versions={detail.versions} density={density} />
+        </>
+      )}
+      {!isSection && (
+        <>
+          {sections.length === 0 && <div className="empty-note">该文档暂无章节</div>}
+          {assembleReader(sections, sectionDetails).map(sec => (
+            <section key={sec.ref.id} id={`sec-${sec.ref.id}`} className="cockpit-reader-section">
+              <div className="cockpit-reader-sechead">
+                <span className="cockpit-reader-sectitle">{sec.title}</span>
+                {sec.blocks[0]?.kind === 'restricted'
+                  ? <span className="cockpit-badge">内容受限（{sec.blocks[0].reason || '权限'}）</span>
+                  : sec.contentState === 'empty' && <span className="cockpit-badge">空</span>}
+              </div>
+              {sec.blocks.map((b, i) => b.kind === 'text'
+                ? <p key={i} className="cockpit-reader-para">{b.text}</p>
+                : <p key={i} className="empty-note">内容受限——标题与状态可见，正文不展示</p>)}
+              <VersionBlock versions={sec.versions} density={density} />
+            </section>
+          ))}
+        </>
+      )}
+    </div>
+  )
+}
+
+function renderBody(body: CockpitContentBlock[] | undefined, meta: CockpitMeta) {
+  if (!body || body.length === 0) return <div className="empty-note">暂无正文</div>
+  if (body[0].kind === 'restricted') {
+    return <div className="empty-note">内容受限（{body[0].reason || '权限'}）——标题与状态可见，正文不展示</div>
+  }
+  return (
+    <>
+      {body.map((b, i) => <p key={i} className="cockpit-reader-para">{b.text}</p>)}
+      {meta.truncated && <div className="cockpit-truncated">详情已截断：{meta.truncationReasons?.join('；')}</div>}
+    </>
+  )
+}
+
+/** 右栏：依据/历史/影响/冲突四标签（同一选中节点；刷新原位，不抢占滚动）。 */
+export function CockpitPanel({ pid, selection, tab, onTab, density }: {
+  pid: string
+  selection: ReaderSelection
+  tab: PanelTabId
+  onTab: (t: PanelTabId) => void
+  density: Density
+}) {
+  const { detail, err } = useNodeDetail(pid, selection.ref)
+  const [historyItems, setHistoryItems] = useState<CockpitHistorySummary[]>([])
+  const [historyMore, setHistoryMore] = useState(false)
+  const [historyCursor, setHistoryCursor] = useState<string | undefined>(undefined)
+  useEffect(() => {
+    setHistoryItems([]); setHistoryMore(false); setHistoryCursor(undefined)
+  }, [selection.ref.kind, selection.ref.id])
+  useEffect(() => {
+    if (!detail?.history) return
+    // 严格合并：只接受 seq 更新的条目，乱序/重复丢弃；不重置已渲染内容。
+    setHistoryItems(prev => mergeHistoryStrict(prev, detail.history.items).items)
+    setHistoryMore(detail.history.hasMore)
+    setHistoryCursor(detail.history.nextCursor)
+  }, [detail])
+  const loadMoreHistory = useCallback(() => {
+    if (!historyCursor) return
+    api.rdmCommand<any>('rdm.cockpit.node.history', { projectId: pid, kind: selection.ref.kind, id: selection.ref.id, cursor: historyCursor, limit: 20 })
+      .then(page => {
+        setHistoryItems(prev => mergeHistoryStrict(prev, page.items).items)
+        setHistoryMore(page.hasMore)
+        setHistoryCursor(page.nextCursor)
+      })
+      .catch(() => { /* 保留已渲染历史；可再次点击重试 */ })
+  }, [pid, selection.ref.kind, selection.ref.id, historyCursor])
+  const node = detail?.node
+  return (
+    <div className={`cockpit-panel cockpit-density-${density}`}>
+      <div className="cockpit-panel-tabs" role="tablist" aria-label="依据与影响">
+        {PANEL_TABS.map(t => (
+          <button key={t.id} type="button" role="tab" aria-selected={tab === t.id}
+            className={`cockpit-panel-tab${tab === t.id ? ' cockpit-panel-tab-active' : ''}`}
+            onClick={() => onTab(t.id)}>
+            {t.label}
+          </button>
+        ))}
+      </div>
+      {err && <div className="empty-note">依据面板加载失败：{err}</div>}
+      {!err && !detail && <div className="empty-note">加载依据…</div>}
+      {detail && tab === 'sources' && (
+        <div className="cockpit-panel-body">
+          <div className="cockpit-panel-count">来源 {node?.state.sourceCount ?? detail.sources.items.length} 条</div>
+          {detail.sources.items.length === 0 && <div className="empty-note">无来源——章节正文未挂依据切片</div>}
+          {detail.sources.items.map((s: any) => (
+            <div key={s.ref.id} className="cockpit-panel-row">
+              <span className="cockpit-panel-kind">{s.ref.kind}</span>
+              <span className="cockpit-panel-label">{s.label}</span>
+              {s.confidence && <span className="cockpit-badge">置信度 {s.confidence}</span>}
+              {s.redactedReason
+                ? <span className="cockpit-badge">受限（{s.redactedReason}）</span>
+                : s.verification && s.verification !== 'not_applicable' && <span className="cockpit-badge">{s.verification}</span>}
+            </div>
+          ))}
+        </div>
+      )}
+      {detail && tab === 'history' && (
+        <div className="cockpit-panel-body">
+          <div className="cockpit-panel-count">已提交事件（最新在前）</div>
+          {historyItems.length === 0 && <div className="empty-note">暂无历史</div>}
+          {historyItems.map(h => <div key={h.seq} className="cockpit-panel-row">{historyLine(h)}</div>)}
+          {historyMore && <button type="button" className="cockpit-tree-more" onClick={loadMoreHistory}>加载更早历史</button>}
+        </div>
+      )}
+      {detail && tab === 'impacts' && (
+        <div className="cockpit-panel-body">
+          <div className="cockpit-panel-count">影响 {node?.state.impactCount ?? detail.impacts.items.length} 项（一跳）</div>
+          {detail.impacts.items.length === 0 && <div className="empty-note">无一跳影响对象</div>}
+          {detail.impacts.items.map((r: any, i: number) => (
+            <div key={`${r.ref.kind}-${r.ref.id}-${i}`} className="cockpit-panel-row">
+              <span className="cockpit-panel-kind">{r.direction === 'incoming' ? '←' : '→'}</span>
+              <span className="cockpit-panel-label">{r.ref.kind}:{r.ref.id}</span>
+              <span className="cockpit-badge">{r.edgeType}</span>
+              <span className="cockpit-badge">{r.edgeState}</span>
+            </div>
+          ))}
+        </div>
+      )}
+      {detail && tab === 'conflicts' && (
+        <div className="cockpit-panel-body">
+          <div className="cockpit-panel-count">冲突 {node?.state.conflictCount ?? 0} 项</div>
+          {detail.conflicts.items.length === 0 && <div className="empty-note">无开放冲突</div>}
+          {detail.conflicts.items.map(c => (
+            <div key={c.id} className="cockpit-panel-row cockpit-panel-conflict">
+              <span className="cockpit-badge">{c.state === 'open' ? '开放' : c.state}</span>
+              <div className="cockpit-conflict-side">甲方：{c.left.visibility === 'full' ? c.left.claim : `受限（${c.left.redactedReason || '权限'}）`}</div>
+              <div className="cockpit-conflict-side">乙方：{c.right.visibility === 'full' ? c.right.claim : `受限（${c.right.redactedReason || '权限'}）`}</div>
+              <div className="cockpit-changetime">{new Date(c.detectedAt).toLocaleString('zh-CN')}</div>
+            </div>
+          ))}
+        </div>
+      )}
+    </div>
+  )
+}

src/components/DocumentCockpit.tsx

@@ -10,10 +10,13 @@ import { store, useStore } from '../store'
 import { EmptyState, SectionLabel } from '@ui'
 import { classifyRdmError } from '../rdmErrors'
 import {
-  contextKey, nodeSummaryLine, sameSnapshot, selectionSurvives, statDisplay,
-  STAT_FILTERS, toggleFilter, treeBadges,
-  type CockpitMeta, type CockpitNodeRef, type CockpitOverview, type CockpitTreeNode, type CockpitTreePage,
+  contextKey, loadPrefs, nodeSummaryLine, sameSnapshot, savePrefs,
+  selectionSurvives, statDisplay, STAT_FILTERS, toggleFilter, treeBadges,
+  type CockpitMeta, type CockpitNodeRef, type CockpitOverview,
+  type CockpitTreeNode, type CockpitTreePage,
+  type Density, type PanelTabId, type ViewMode,
 } from '../documentCockpit'
+import { CockpitPanel, CockpitReader } from './CockpitReader'
 
 interface ProjectView { id: string; name: string; canAudit?: boolean }
 
@@ -34,6 +37,9 @@ export function DocumentCockpit() {
   const [selected, setSelected] = useState<Selection | null>(null)
   const [error, setError] = useState('')
   const [loadErr, setLoadErr] = useState('')
+  const [viewMode, setViewMode] = useState<ViewMode>('panorama')
+  const [density, setDensity] = useState<Density>('compact')
+  const [panelTab, setPanelTab] = useState<PanelTabId>('sources')
   const gen = useRef(0)
 
   const reload = useCallback((projectId: string, f: string) => {
@@ -70,6 +76,23 @@ export function DocumentCockpit() {
     reload(pid, filter)
   }, [pid, filter, reload])
 
+  // 个人视图偏好（设计 §7.3）：按 登录世代+项目 隔离，仅本地；恢复最近视图。
+  useEffect(() => {
+    if (!pid) return
+    const prefs = loadPrefs(`epoch-${identity}`, pid)
+    setViewMode(prefs.lastView)
+    setDensity(prefs.density)
+    setPanelTab(prefs.rightPanelTab)
+  }, [identity, pid])
+  const applyPrefs = useCallback((patch: { lastView?: ViewMode; density?: Density; rightPanelTab?: PanelTabId }) => {
+    if (!pid) return
+    setViewMode(v => patch.lastView ?? v)
+    setDensity(d => patch.density ?? d)
+    setPanelTab(t => patch.rightPanelTab ?? t)
+    const prefs = loadPrefs(`epoch-${identity}`, pid)
+    savePrefs(`epoch-${identity}`, pid, { ...prefs, ...patch })
+  }, [identity, pid])
+
   // 展开文档：按需加载章节子页（键集分页；旧项目/旧筛选的响应丢弃；
   // 加载失败只影响该分支——行内保留重试，不拖垮其它面板）。
   const loadChildren = useCallback((docId: string, cursor?: string) => {
@@ -106,6 +129,11 @@ export function DocumentCockpit() {
           筛选：{STAT_FILTERS.find(s => s.filter === filter)?.label || filter} ✕
         </button>}
         <span className="cockpit-snap">{overview ? `快照 ${overview.meta.snapshotRevision}` : '加载中…'}</span>
+        <div className="cockpit-viewtoggle" role="group" aria-label="视图切换">
+          <button type="button" className={`cockpit-viewbtn${viewMode === 'panorama' ? ' cockpit-viewbtn-active' : ''}`} onClick={() => applyPrefs({ lastView: 'panorama' })}>全景</button>
+          <button type="button" className={`cockpit-viewbtn${viewMode === 'reader' ? ' cockpit-viewbtn-active' : ''}`} onClick={() => applyPrefs({ lastView: 'reader' })}>阅读器</button>
+          <button type="button" className="cockpit-viewbtn" onClick={() => applyPrefs({ density: density === 'compact' ? 'full' : 'compact' })} title="切换密度">{density === 'compact' ? '紧凑' : '宽松'}</button>
+        </div>
         <button type="button" className="cockpit-refresh" onClick={() => reload(pid, filter)} disabled={!pid}>刷新</button>
       </div>
       {splitNotice && (
@@ -135,7 +163,7 @@ export function DocumentCockpit() {
           <div className="cockpit-stat"><span className="cockpit-stat-num">{overview.stats.updatedAt ? new Date(overview.stats.updatedAt).toLocaleString('zh-CN') : '—'}</span><span className="cockpit-stat-label">最近更新</span></div>
         </div>
       )}
-      <div className="cockpit-columns">
+      <div className={`cockpit-columns${selected ? ' cockpit-columns-3' : ''}`}>
         <div className="cockpit-tree" role="tree" aria-label="文档结构树">
           <SectionLabel>结构树</SectionLabel>
           {!overview && <div className="empty-note">加载结构…</div>}
@@ -160,12 +188,23 @@ export function DocumentCockpit() {
           {overview && !selected && (
             <PanoramaHome overview={overview} onSelect={selectDoc} />
           )}
-          {overview && selected && (
+          {overview && selected && viewMode === 'panorama' && (
             <PanoramaNode pid={pid} selection={selected} overview={overview}
               childPage={selected.ref.kind === 'document' ? treePages[selected.ref.id] : undefined}
-              onClear={() => setSelected(null)} />
+              onClear={() => setSelected(null)}
+              onOpenReader={() => applyPrefs({ lastView: 'reader' })} />
+          )}
+          {overview && selected && viewMode === 'reader' && (
+            <CockpitReader pid={pid} selection={selected}
+              sections={selected.ref.kind === 'document' ? (treePages[selected.ref.id]?.items || []) : []}
+              density={density} onBack={() => applyPrefs({ lastView: 'panorama' })} />
           )}
         </div>
+        {overview && selected && (
+          <div className="cockpit-right">
+            <CockpitPanel pid={pid} selection={selected} tab={panelTab} onTab={t => applyPrefs({ rightPanelTab: t })} density={density} />
+          </div>
+        )}
       </div>
     </div>
   )
@@ -243,10 +282,11 @@ function PanoramaHome({ overview, onSelect }: { overview: CockpitOverview; onSel
   )
 }
 
-function PanoramaNode({ pid, selection, overview, childPage, onClear }: {
+function PanoramaNode({ pid, selection, overview, childPage, onClear, onOpenReader }: {
   pid: string; selection: Selection; overview: CockpitOverview
   childPage?: { items: CockpitTreeNode[]; nextCursor?: string; hasMore: boolean; meta?: CockpitMeta }
   onClear: () => void
+  onOpenReader: () => void
 }) {
   const [detail, setDetail] = useState<any>(null)
   const [err, setErr] = useState('')
@@ -267,6 +307,7 @@ function PanoramaNode({ pid, selection, overview, childPage, onClear }: {
         <button type="button" className="cockpit-back" onClick={onClear}>← 返回概览</button>
         <span className="cockpit-nodetitle">{title}</span>
         {node && <span className="cockpit-nodesum">{nodeSummaryLine(node)}</span>}
+        <button type="button" className="cockpit-filter-chip" onClick={onOpenReader}>在阅读器中打开</button>
       </div>
       {err && <CockpitErrorState raw={err} />}
       {detail?.body?.length === 1 && detail.body[0].kind === 'restricted' && (
@@ -300,7 +341,7 @@ function PanoramaNode({ pid, selection, overview, childPage, onClear }: {
         </>
       )}
       {node && node.ref.kind === 'section' && (
-        <div className="empty-note">连续正文阅读与依据/影响面板在阅读器视图提供（I3）——本页展示状态摘要</div>
+        <div className="empty-note">点「在阅读器中打开」查看连续正文与版本差异；右侧为该节点的依据与影响面板</div>
       )}
       {detail?.meta?.truncated && (
         <div className="cockpit-truncated">详情已截断：{detail.meta.truncationReasons?.join('；')}</div>

src/documentCockpit.test.ts

@@ -124,3 +124,91 @@ describe('树徽标与状态行', () => {
     expect(line).toContain('层级止于章节')
   })
 })
+
+// ---- I3：阅读器与右栏纯逻辑 ----
+import {
+  assembleReader, diffLines, historyLine, mergeHistoryStrict, versionSummary,
+  prefsKey, mergePrefs, loadPrefs,
+  type CockpitHistorySummary, type CockpitVersionSummary,
+} from './documentCockpit'
+
+describe('偏好：按用户+项目隔离，枚举外脏值回落默认', () => {
+  it('prefsKey 区分用户与项目', () => {
+    expect(prefsKey('a', 'p1')).not.toBe(prefsKey('a', 'p2'))
+    expect(prefsKey('a', 'p1')).not.toBe(prefsKey('b', 'p1'))
+  })
+  it('mergePrefs 逐项校验', () => {
+    expect(mergePrefs(null)).toEqual({ lastView: 'panorama', density: 'compact', rightPanelTab: 'sources' })
+    expect(mergePrefs({ lastView: 'reader', density: 'full', rightPanelTab: 'conflicts' })).toEqual({
+      lastView: 'reader', density: 'full', rightPanelTab: 'conflicts',
+    })
+    const junk = mergePrefs({ lastView: 'galaxy', density: 42, rightPanelTab: 'nope' })
+    expect(junk.lastView).toBe('panorama')
+    expect(junk.density).toBe('compact')
+    expect(junk.rightPanelTab).toBe('sources')
+  })
+  it('loadPrefs 在无 localStorage 环境安全回落', () => {
+    expect(loadPrefs('a', 'p1').lastView).toBe('panorama')
+  })
+})
+
+describe('版本摘要与行级差异', () => {
+  const v = (seq: number, content?: string, redacted?: boolean): CockpitVersionSummary => ({
+    seq, version: `v${seq}`, at: '2026-10-16T00:00:00Z', basisCount: 0, content, redacted,
+  })
+  it('当前+前一版；受限整体降级', () => {
+    const s = versionSummary([v(3, '三'), v(2, '二'), v(1, '一')])
+    expect(s.current?.version).toBe('v3')
+    expect(s.previous?.version).toBe('v2')
+    expect(s.redacted).toBe(false)
+    const r = versionSummary([v(3, undefined, true)])
+    expect(r.redacted).toBe(true)
+    expect(versionSummary(undefined).current).toBeUndefined()
+  })
+  it('diffLines 标记新增/删除/保留', () => {
+    const d = diffLines('共同\n新增行', '共同\n删除行')
+    expect(d).toContainEqual({ flag: '=', text: '共同' })
+    expect(d).toContainEqual({ flag: '+', text: '新增行' })
+    expect(d).toContainEqual({ flag: '-', text: '删除行' })
+  })
+})
+
+describe('历史严格合并：乱序与重复丢弃（DV-R05）', () => {
+  const h = (seq: number): CockpitHistorySummary => ({ seq, at: '', op: 'x', summary: `s${seq}` })
+  it('只接受 seq 更大的条目', () => {
+    const r = mergeHistoryStrict([h(10), h(9)], [h(11), h(8)])
+    expect(r.items.map(i => i.seq)).toEqual([10, 9, 11])
+    expect(r.dropped).toBe(1)
+  })
+  it('重复 seq 丢弃且计入 dropped', () => {
+    const r = mergeHistoryStrict([h(10)], [h(10), h(11)])
+    expect(r.items.map(i => i.seq)).toEqual([10, 11])
+    expect(r.dropped).toBe(1)
+  })
+  it('空历史接受全部', () => {
+    expect(mergeHistoryStrict([], [h(1), h(2)]).items.map(i => i.seq)).toEqual([1, 2])
+  })
+  it('historyLine 带操作者与本地时间', () => {
+    expect(historyLine(h(1))).toContain('s1')
+  })
+})
+
+describe('阅读器装配：受限章节给占位不冒充空内容', () => {
+  const sec = (id: string, content: string): CockpitTreeNode => ({
+    ref: { kind: 'section', id }, title: id, path: [], childCount: 0,
+    state: { content, verification: 'not_applicable', sourceCount: 0, conflictCount: 0, impactCount: 0, missingChildCount: 0, structuralGap: true },
+    visibility: 'full',
+  })
+  it('正文/受限/未加载三分态', () => {
+    const out = assembleReader(
+      [sec('a', 'complete'), sec('b', 'complete'), sec('c', 'empty')],
+      {
+        a: { body: [{ kind: 'text', text: '正文A' }] },
+        b: { body: [{ kind: 'restricted', reason: 'section-duty-or-authorship' }] },
+      },
+    )
+    expect(out[0].blocks).toEqual([{ kind: 'text', text: '正文A' }])
+    expect(out[1].blocks[0].kind).toBe('restricted')
+    expect(out[2].blocks[0].reason).toBe('not_loaded')
+  })
+})

src/documentCockpit.ts

@@ -168,3 +168,175 @@ export function nodeSummaryLine(n: CockpitTreeNode): string {
   if (n.state.impactCount > 0) parts.push(`影响 ${n.state.impactCount}`)
   return parts.join(' · ')
 }
+
+// ---- I3：阅读器与右栏纯逻辑 ----
+
+export interface CockpitVersionSummary {
+  seq: number
+  version: string
+  actor?: string
+  at: string
+  basisCount: number
+  content?: string
+  redacted?: boolean
+}
+
+export interface CockpitContentBlock { kind: string; text?: string; reason?: string }
+
+export interface CockpitSourceSummary {
+  ref: { kind: string; id: string }
+  label: string
+  capturedAt?: string
+  confidence: string
+  verification: string
+  visibility: string
+  redactedReason?: string
+}
+
+export interface CockpitHistorySummary {
+  seq: number
+  at: string
+  op: string
+  actor?: string
+  summary: string
+  operationId?: string
+}
+
+export interface CockpitImpactSummary {
+  ref: { kind: string; id: string }
+  edgeType: string
+  edgeState: string
+  direction: string
+  layer: string
+}
+
+export interface CockpitAssertion { node: CockpitNodeRef; claim: string; visibility: string; redactedReason?: string }
+
+export interface CockpitConflictSummary {
+  id: string
+  node: CockpitNodeRef
+  state: string
+  left: CockpitAssertion
+  right: CockpitAssertion
+  detectedAt: string
+  resolutionRef?: string
+}
+
+export interface CockpitPage<T> { meta?: CockpitMeta; items: T[]; nextCursor?: string; hasMore: boolean; truncated?: boolean }
+
+export const PANEL_TABS = [
+  { id: 'sources', label: '内容来源' },
+  { id: 'history', label: '修改历史' },
+  { id: 'impacts', label: '影响对象' },
+  { id: 'conflicts', label: '冲突与风险' },
+] as const
+export type PanelTabId = (typeof PANEL_TABS)[number]['id']
+
+export type ViewMode = 'panorama' | 'reader'
+export type Density = 'compact' | 'full'
+
+export interface CockpitPrefs {
+  lastView: ViewMode
+  density: Density
+  rightPanelTab: PanelTabId
+}
+
+/** 偏好按 用户+项目 隔离（设计 §7.3）；仅本地存储，不构成授权。 */
+export function prefsKey(actor: string, projectId: string): string {
+  return `cockpit-prefs:${actor}:${projectId}`
+}
+
+/** 解析偏好：枚举外的脏值逐项回落默认（panorama+compact+sources）。 */
+export function mergePrefs(raw: unknown): CockpitPrefs {
+  const base: CockpitPrefs = { lastView: 'panorama', density: 'compact', rightPanelTab: 'sources' }
+  if (!raw || typeof raw !== 'object') return base
+  const r = raw as Record<string, unknown>
+  const out = { ...base }
+  if (r.lastView === 'panorama' || r.lastView === 'reader') out.lastView = r.lastView
+  if (r.density === 'compact' || r.density === 'full') out.density = r.density
+  if (PANEL_TABS.some(t => t.id === r.rightPanelTab)) out.rightPanelTab = r.rightPanelTab as PanelTabId
+  return out
+}
+
+export function loadPrefs(actor: string, projectId: string): CockpitPrefs {
+  try {
+    const raw = typeof localStorage !== 'undefined' ? localStorage.getItem(prefsKey(actor, projectId)) : null
+    return mergePrefs(raw ? JSON.parse(raw) : null)
+  } catch {
+    return mergePrefs(null)
+  }
+}
+
+export function savePrefs(actor: string, projectId: string, prefs: CockpitPrefs): void {
+  try {
+    if (typeof localStorage !== 'undefined') localStorage.setItem(prefsKey(actor, projectId), JSON.stringify(prefs))
+  } catch { /* 存储不可用时偏好静默降级为会话内 */ }
+}
+
+/** 版本摘要：当前版本 + 前一版本（视图规格 §5）。versions 为最新在前；受限版本无 content。 */
+export function versionSummary(versions: CockpitVersionSummary[] | undefined): {
+  current?: CockpitVersionSummary
+  previous?: CockpitVersionSummary
+  redacted: boolean
+} {
+  if (!versions || versions.length === 0) return { redacted: false }
+  const current = versions[0]
+  const previous = versions.length > 1 ? versions[1] : undefined
+  return { current, previous, redacted: !!current.redacted }
+}
+
+/** 历史面板合并：只接受严格更新（seq 更大且未见）的条目；过期与重复都计入 dropped（DV-R05/契约 §8）。 */
+export function mergeHistoryStrict(existing: CockpitHistorySummary[], incoming: CockpitHistorySummary[]): {
+  items: CockpitHistorySummary[]
+  dropped: number
+} {
+  const seen = new Set(existing.map(e => e.seq))
+  const maxSeq = existing.length > 0 ? Math.max(...seen) : -1
+  const items = [...existing]
+  let dropped = 0
+  for (const e of incoming) {
+    if (e.seq <= maxSeq || seen.has(e.seq)) {
+      dropped++
+      continue
+    }
+    seen.add(e.seq)
+    items.push(e)
+  }
+  return { items, dropped }
+}
+
+/** 阅读器装配：把文档的章节详情按树顺序组装为连续正文；受限章节给占位说明而非空白。 */
+export function assembleReader(
+  sections: CockpitTreeNode[],
+  details: Record<string, { body?: CockpitContentBlock[]; versions?: CockpitVersionSummary[] } | undefined>,
+): { ref: CockpitNodeRef; title: string; contentState: string; blocks: CockpitContentBlock[]; versions?: CockpitVersionSummary[] }[] {
+  return sections.map(sec => {
+    const d = details[sec.ref.id]
+    const readable = !!d?.body && d.body.length > 0 && d.body[0].kind === 'text'
+    const restricted = !!d?.body && d.body.length > 0 && d.body[0].kind === 'restricted'
+    const blocks: CockpitContentBlock[] = readable
+      ? (d!.body as CockpitContentBlock[])
+      : restricted
+        ? [{ kind: 'restricted', reason: d?.body?.[0]?.reason || 'section-duty-or-authorship' }]
+        : [{ kind: 'restricted', reason: 'not_loaded' }]
+    return { ref: sec.ref, title: sec.title, contentState: sec.state.content, blocks, versions: d?.versions }
+  })
+}
+
+/** 行级差异（阅读器 Collapsible 的完整对比）：按行对齐的朴素 LCS 免实现——
+ * 以行为单位做集合比对标记 +/=/-，足够呈现「完整差异」而不冒充精确补丁。 */
+export function diffLines(current: string, previous: string): { flag: '+' | '-' | '='; text: string }[] {
+  const cur = current.split('\n')
+  const prev = new Set(previous.split('\n'))
+  const curSet = new Set(cur)
+  const out: { flag: '+' | '-' | '='; text: string }[] = []
+  for (const line of cur) out.push({ flag: prev.has(line) ? '=' : '+', text: line })
+  for (const line of previous.split('\n')) if (!curSet.has(line)) out.push({ flag: '-', text: line })
+  return out
+}
+
+/** 历史条目的自然语言时间线文本（右栏 §6）。 */
+export function historyLine(h: CockpitHistorySummary): string {
+  const who = h.actor ? `${h.actor} ` : ''
+  return `${h.summary}（${who}${new Date(h.at).toLocaleString('zh-CN')}）`
+}

src/styles.css

@@ -691,3 +691,33 @@ button.cockpit-tree-more { cursor: pointer; text-decoration: underline; }
 .cockpit-childtable { width: 100%; border-collapse: collapse; font-size: var(--fs-ui-sm); }
 .cockpit-childtable th, .cockpit-childtable td { border-bottom: 1px solid var(--border); padding: 4px 6px; text-align: left; color: var(--text); }
 @media (max-width: 760px) { .cockpit-columns { grid-template-columns: 1fr; } .cockpit-tree { max-height: 40vh; } }
+
+/* ---- 驾驶舱 I3：阅读器与右栏（令牌驱动） ---- */
+.cockpit-columns-3 { grid-template-columns: minmax(200px, 260px) 1fr minmax(240px, 300px); }
+.cockpit-right { min-height: 0; overflow-y: auto; border-left: 1px solid var(--border); padding-left: 12px; }
+.cockpit-viewtoggle { display: flex; gap: 0; }
+.cockpit-viewbtn { height: 28px; padding: 0 10px; font-size: var(--fs-ui-sm); border: 1px solid var(--border); background: var(--bg-panel); color: var(--text); cursor: pointer; }
+.cockpit-viewbtn-active { background: var(--text); color: var(--bg-panel); }
+.cockpit-reader-para { white-space: pre-wrap; font-size: var(--fs-ui-base, var(--fs-ui-sm)); line-height: 1.6; color: var(--text); margin: 6px 0; }
+.cockpit-density-full .cockpit-reader-para { line-height: 1.9; margin: 10px 0; }
+.cockpit-reader-section { border-top: 1px solid var(--border); padding: 8px 0; }
+.cockpit-reader-sechead { display: flex; align-items: baseline; gap: 8px; }
+.cockpit-reader-sectitle { font-weight: 600; color: var(--text); font-size: var(--fs-ui-base, var(--fs-ui-sm)); }
+.cockpit-versions { font-size: var(--fs-ui-sm); }
+.cockpit-density-full .cockpit-versions { line-height: 1.7; }
+.cockpit-versions-toggle { font-size: var(--fs-ui-sm); color: var(--text); text-decoration: underline; cursor: pointer; }
+.cockpit-versions-head { color: var(--text-muted, var(--text)); padding: 4px 0; }
+.cockpit-diff { white-space: pre-wrap; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 6px 8px; font-size: var(--fs-ui-sm); }
+.cockpit-diff-add { color: var(--text); }
+.cockpit-diff-del { color: var(--text-muted, var(--text)); text-decoration: line-through; }
+.cockpit-diff-same { color: var(--text-muted, var(--text)); }
+.cockpit-panel-tabs { display: flex; gap: 4px; padding-bottom: 8px; }
+.cockpit-panel-tab { border: 1px solid var(--border); background: none; padding: 3px 8px; font-size: var(--fs-ui-sm); color: var(--text); cursor: pointer; border-radius: var(--radius-sm); }
+.cockpit-panel-tab-active { background: var(--bg-panel); border-color: var(--text); }
+.cockpit-panel-body { display: flex; flex-direction: column; gap: 6px; }
+.cockpit-panel-count { font-size: var(--fs-ui-sm); color: var(--text-muted, var(--text)); }
+.cockpit-panel-row { display: flex; flex-wrap: wrap; gap: 6px; align-items: baseline; font-size: var(--fs-ui-sm); border-top: 1px solid var(--border); padding: 4px 0; }
+.cockpit-panel-kind { color: var(--text-muted, var(--text)); }
+.cockpit-panel-label { color: var(--text); }
+.cockpit-panel-conflict { flex-direction: column; }
+.cockpit-conflict-side { color: var(--text); }