diff --git a/frontend/src/components/shared/ContextBar.tsx b/frontend/src/components/shared/ContextBar.tsx
new file mode 100644
index 0000000..a3b50a3
--- /dev/null
+++ b/frontend/src/components/shared/ContextBar.tsx
@@ -0,0 +1,130 @@
+/** Context Bar 组件 — Scope/Lens/Time 三维上下文切换器。 */
+
+"use client";
+
+import { ChevronDown, Building2, Layers, Clock, Filter } from "lucide-react";
+import { useState, useRef, useEffect } from "react";
+import {
+  useContextBar,
+  SCOPE_OPTIONS,
+  LENS_OPTIONS,
+  TIME_OPTIONS,
+  ACTION_FILTER_OPTIONS,
+  type ScopeOption,
+  type LensOption,
+  type TimeOption,
+  type ActionFilter,
+} from "@/lib/context-bar-context";
+
+/**
+ * 下拉选择器内部组件。
+ */
+function Dropdown<T extends string>({
+  icon: Icon,
+  label,
+  options,
+  value,
+  onChange,
+}: {
+  icon: typeof Building2;
+  label: string;
+  options: { value: T; label: string }[];
+  value: T;
+  onChange: (value: T) => void;
+}) {
+  const [open, setOpen] = useState(false);
+  const ref = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    function handleClickOutside(e: MouseEvent) {
+      if (ref.current && !ref.current.contains(e.target as Node)) {
+        setOpen(false);
+      }
+    }
+    document.addEventListener("mousedown", handleClickOutside);
+    return () => document.removeEventListener("mousedown", handleClickOutside);
+  }, []);
+
+  const current = options.find((o) => o.value === value);
+
+  return (
+    <div ref={ref} className="relative">
+      <button
+        type="button"
+        onClick={() => setOpen(!open)}
+        className="flex items-center gap-1.5 rounded-md border border-gray-200 bg-white px-3 py-1.5 text-sm text-gray-700 transition-colors hover:bg-gray-50"
+        aria-expanded={open}
+      >
+        <Icon size={14} className="text-gray-400" aria-hidden="true" />
+        <span className="text-xs text-gray-400">{label}</span>
+        <span className="font-medium">{current?.label ?? value}</span>
+        <ChevronDown size={14} className="text-gray-400" aria-hidden="true" />
+      </button>
+      {open && (
+        <div className="absolute left-0 top-full z-20 mt-1 min-w-[160px] rounded-md border border-gray-200 bg-white py-1 shadow-lg">
+          {options.map((opt) => (
+            <button
+              key={opt.value}
+              type="button"
+              onClick={() => {
+                onChange(opt.value);
+                setOpen(false);
+              }}
+              className={`block w-full px-3 py-1.5 text-left text-sm transition-colors hover:bg-gray-50 ${
+                opt.value === value ? "bg-indigo-50 text-indigo-600" : "text-gray-700"
+              }`}
+            >
+              {opt.label}
+            </button>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}
+
+/**
+ * Context Bar 组件 — 全局上下文切换栏。
+ *
+ * 包含 Scope（范围）、Lens（主题）、Time（时间）三个维度，
+ * 以及 Action Filter（行动筛选器）。
+ */
+export function ContextBar() {
+  const { scope, lens, time, actionFilter, setScope, setLens, setTime, setActionFilter } =
+    useContextBar();
+
+  return (
+    <div className="sticky top-0 z-10 flex flex-wrap items-center gap-2 border-b bg-white/95 px-4 py-2 backdrop-blur">
+      <Dropdown
+        icon={Building2}
+        label="范围"
+        options={SCOPE_OPTIONS}
+        value={scope}
+        onChange={(v: ScopeOption) => setScope(v)}
+      />
+      <Dropdown
+        icon={Layers}
+        label="主题"
+        options={LENS_OPTIONS}
+        value={lens}
+        onChange={(v: LensOption) => setLens(v)}
+      />
+      <Dropdown
+        icon={Clock}
+        label="时间"
+        options={TIME_OPTIONS}
+        value={time}
+        onChange={(v: TimeOption) => setTime(v)}
+      />
+      <div className="ml-auto">
+        <Dropdown
+          icon={Filter}
+          label="筛选"
+          options={ACTION_FILTER_OPTIONS}
+          value={actionFilter}
+          onChange={(v: ActionFilter) => setActionFilter(v)}
+        />
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/components/shared/InsightRail.tsx b/frontend/src/components/shared/InsightRail.tsx
new file mode 100644
index 0000000..1f40c08
--- /dev/null
+++ b/frontend/src/components/shared/InsightRail.tsx
@@ -0,0 +1,208 @@
+/** Insight Rail 组件 — 右侧 AI 洞察面板，可展开/折叠。 */
+
+"use client";
+
+import { useState } from "react";
+import {
+  ChevronRight, ChevronLeft, Bot, Sparkles, FileText, AlertTriangle,
+  Users, ScrollText, Network, UserCircle, TrendingUp, Cpu, ShieldCheck,
+  type LucideIcon,
+} from "lucide-react";
+
+/** Agent 类型定义。 */
+interface AgentDef {
+  key: string;
+  name: string;
+  icon: LucideIcon;
+  trigger: string;
+  output: string;
+  action: string;
+}
+
+/** 12 个 Agent 配置。 */
+const AGENTS: AgentDef[] = [
+  { key: "report", name: "报表分析", icon: FileText, trigger: "查看月报/季报", output: "指标提取卡片 + 异常高亮", action: "生成投后摘要草稿" },
+  { key: "validator", name: "数据校验", icon: ShieldCheck, trigger: "指标出现矛盾", output: "校验维度矩阵 + 可信度评分", action: "标记可疑数据" },
+  { key: "risk", name: "风险预警", icon: AlertTriangle, trigger: "健康度下降/弱信号", output: "风险等级 + 证据链", action: "创建决策线程" },
+  { key: "board", name: "董事会", icon: Users, trigger: "董事会前后", output: "决议追踪 + 提问清单", action: "加入董事会议题" },
+  { key: "agreement", name: "投资协议", icon: ScrollText, trigger: "协议条款即将触发", output: "条款原文 + 触发条件", action: "发送披露提醒" },
+  { key: "synergy", name: "协同匹配", icon: Network, trigger: "查看协同中心", output: "匹配度评分 + 资源互补图", action: "生成协同方案草稿" },
+  { key: "talent", name: "人才分析", icon: UserCircle, trigger: "核心团队变动", output: "稳定性评分 + 9-Box 矩阵", action: "启动人才搜索" },
+  { key: "financing", name: "融资支持", icon: TrendingUp, trigger: "融资阶段/Runway", output: "融资准备度 + 投资人画像", action: "生成融资材料清单" },
+  { key: "research", name: "行业研究", icon: Bot, trigger: "竞品/行业动态", output: "行业风险提示 + 对标分析", action: "加入洞察域报告" },
+  { key: "ai_commercial", name: "AI+商业化", icon: Sparkles, trigger: "PoC/转化率指标", output: "转化漏斗 + 证据链", action: "生成董事会问题清单" },
+  { key: "ai_cost", name: "AI+模型成本", icon: Cpu, trigger: "推理成本/毛利指标", output: "成本趋势 + 单位经济模型", action: "建议模型调用优化" },
+  { key: "ai_compliance", name: "AI+数据合规", icon: ShieldCheck, trigger: "合规指标变化", output: "合规风险等级 + 整改建议", action: "生成合规报告草稿" },
+];
+
+/** Insight Rail Props。 */
+interface InsightRailProps {
+  /** 当前激活的 Agent key，默认 "risk"。 */
+  defaultAgent?: string;
+}
+
+/**
+ * Insight Rail 组件 — 桌面端右侧可折叠 AI 洞察面板。
+ *
+ * 展开宽度 w-80（320px），折叠宽度 w-10（40px）。
+ * 包含 12 个 Agent 差异化卡片，支持 Tab 切换。
+ */
+export function InsightRail({ defaultAgent = "risk" }: InsightRailProps) {
+  const [expanded, setExpanded] = useState(false);
+  const [activeAgent, setActiveAgent] = useState(defaultAgent);
+  const [activeTabs, setActiveTabs] = useState<string[]>([defaultAgent]);
+
+  const agent = AGENTS.find((a) => a.key === activeAgent) ?? AGENTS[0];
+
+  /** 切换 Agent（最多 3 个 Tab）。 */
+  function switchAgent(key: string) {
+    setActiveAgent(key);
+    setActiveTabs((prev) => {
+      if (prev.includes(key)) return prev;
+      if (prev.length >= 3) return [...prev.slice(1), key];
+      return [...prev, key];
+    });
+  }
+
+  if (!expanded) {
+    return (
+      <aside
+        className="sticky top-0 hidden h-screen w-10 shrink-0 items-center justify-center border-l bg-white md:flex"
+        aria-expanded={false}
+      >
+        <button
+          type="button"
+          onClick={() => setExpanded(true)}
+          className="flex flex-col items-center gap-1 text-gray-400 transition-colors hover:text-indigo-600"
+          aria-label="展开 Insight Rail"
+        >
+          <ChevronLeft size={18} aria-hidden="true" />
+          <Bot size={16} aria-hidden="true" />
+          <span className="text-xs [writing-mode:vertical-rl]">Insight</span>
+        </button>
+      </aside>
+    );
+  }
+
+  return (
+    <aside
+      className="sticky top-0 hidden h-screen w-80 shrink-0 flex-col border-l bg-white md:flex"
+      aria-expanded={true}
+    >
+      {/* 顶部：折叠按钮 + 当前上下文 */}
+      <div className="flex items-center justify-between border-b px-3 py-2">
+        <span className="text-sm font-medium">AI 洞察</span>
+        <button
+          type="button"
+          onClick={() => setExpanded(false)}
+          className="text-gray-400 transition-colors hover:text-gray-600"
+          aria-label="折叠 Insight Rail"
+        >
+          <ChevronRight size={18} aria-hidden="true" />
+        </button>
+      </div>
+
+      {/* 当前上下文摘要 */}
+      <div className="border-b px-3 py-2 text-xs text-muted-foreground">
+        <div>企业 A · 治理</div>
+        <div>近 90 天 · 3 个风险</div>
+      </div>
+
+      {/* Agent Tab 切换 */}
+      <div className="flex gap-1 border-b px-2 py-1.5">
+        {activeTabs.map((key) => {
+          const a = AGENTS.find((ag) => ag.key === key)!;
+          return (
+            <button
+              key={key}
+              type="button"
+              onClick={() => setActiveAgent(key)}
+              className={`flex items-center gap-1 rounded px-2 py-1 text-xs transition-colors ${
+                key === activeAgent
+                  ? "bg-indigo-50 text-indigo-600"
+                  : "text-gray-500 hover:bg-gray-50"
+              }`}
+            >
+              <a.icon size={12} aria-hidden="true" />
+              {a.name}
+            </button>
+          );
+        })}
+      </div>
+
+      {/* Agent 列表 */}
+      <div className="flex-1 overflow-y-auto px-3 py-2">
+        {/* 当前 Agent 输出 */}
+        <div className="mb-3 rounded-lg border bg-gray-50 p-3">
+          <div className="mb-2 flex items-center gap-2">
+            <agent.icon size={16} className="text-indigo-500" aria-hidden="true" />
+            <span className="text-sm font-medium">{agent.name}</span>
+          </div>
+          <div className="space-y-1.5 text-xs text-gray-600">
+            <p><span className="text-gray-400">触发：</span>{agent.trigger}</p>
+            <p><span className="text-gray-400">输出：</span>{agent.output}</p>
+            <p><span className="text-gray-400">建议：</span>{agent.action}</p>
+          </div>
+        </div>
+
+        {/* AI 输出规范字段 */}
+        <div className="mb-3 space-y-1.5 rounded-lg border p-3 text-xs">
+          <div className="flex justify-between">
+            <span className="text-gray-400">置信度</span>
+            <span className="font-medium text-indigo-600">0.85</span>
+          </div>
+          <div className="flex justify-between">
+            <span className="text-gray-400">证据</span>
+            <span className="text-gray-600">3 条关联信号</span>
+          </div>
+          <div className="flex justify-between">
+            <span className="text-gray-400">担忧</span>
+            <span className="text-gray-600">数据延迟 2 天</span>
+          </div>
+          <div className="flex justify-between">
+            <span className="text-gray-400">兜底</span>
+            <span className="text-gray-600">未使用</span>
+          </div>
+        </div>
+
+        {/* 操作按钮 */}
+        <div className="space-y-2">
+          <button
+            type="button"
+            className="w-full rounded-md bg-indigo-50 px-3 py-2 text-sm text-indigo-600 transition-colors hover:bg-indigo-100"
+          >
+            创建任务草稿
+          </button>
+          <button
+            type="button"
+            className="w-full rounded-md border px-3 py-2 text-sm text-gray-600 transition-colors hover:bg-gray-50"
+          >
+            发起情景模拟
+          </button>
+        </div>
+
+        {/* 全部 Agent 列表 */}
+        <div className="mt-4">
+          <div className="mb-2 text-xs font-medium text-gray-400">全部 Agent</div>
+          <div className="grid grid-cols-2 gap-1">
+            {AGENTS.map((a) => (
+              <button
+                key={a.key}
+                type="button"
+                onClick={() => switchAgent(a.key)}
+                className={`flex items-center gap-1.5 rounded px-2 py-1.5 text-xs transition-colors ${
+                  a.key === activeAgent
+                    ? "bg-indigo-50 text-indigo-600"
+                    : "text-gray-600 hover:bg-gray-50"
+                }`}
+              >
+                <a.icon size={12} aria-hidden="true" />
+                {a.name}
+              </button>
+            ))}
+          </div>
+        </div>
+      </div>
+    </aside>
+  );
+}
diff --git a/frontend/src/components/shared/WorkModeSwitcher.tsx b/frontend/src/components/shared/WorkModeSwitcher.tsx
new file mode 100644
index 0000000..aadfe7d
--- /dev/null
+++ b/frontend/src/components/shared/WorkModeSwitcher.tsx
@@ -0,0 +1,72 @@
+/** Work Mode 切换器组件 — Overview/Compare/Focus/Queue 四种自适应模式。 */
+
+"use client";
+
+import { LayoutGrid, GitCompareArrows, Focus, Columns2 } from "lucide-react";
+import { useState, type ReactNode } from "react";
+
+/** 工作模式类型。 */
+export type WorkMode = "overview" | "compare" | "focus" | "queue";
+
+/** 工作模式配置。 */
+const MODE_CONFIG: Record<WorkMode, { label: string; icon: typeof LayoutGrid; description: string }> = {
+  overview: {
+    label: "总览",
+    icon: LayoutGrid,
+    description: "Portfolio 全局浏览",
+  },
+  compare: {
+    label: "对比",
+    icon: GitCompareArrows,
+    description: "2-5 家企业并排对比",
+  },
+  focus: {
+    label: "聚焦",
+    icon: Focus,
+    description: "单企业深度分析",
+  },
+  queue: {
+    label: "队列",
+    icon: Columns2,
+    description: "左右分栏批量处理",
+  },
+};
+
+/** Work Mode 切换器 Props。 */
+interface WorkModeSwitcherProps {
+  mode: WorkMode;
+  onChange: (mode: WorkMode) => void;
+}
+
+/**
+ * Work Mode 切换器组件。
+ *
+ * 四种自适应工作模式：Overview / Compare / Focus / Queue。
+ */
+export function WorkModeSwitcher({ mode, onChange }: WorkModeSwitcherProps) {
+  return (
+    <div className="flex items-center gap-1 rounded-lg border bg-white p-1">
+      {(Object.keys(MODE_CONFIG) as WorkMode[]).map((key) => {
+        const config = MODE_CONFIG[key];
+        const isActive = mode === key;
+        return (
+          <button
+            key={key}
+            type="button"
+            onClick={() => onChange(key)}
+            title={config.description}
+            className={`flex items-center gap-1.5 rounded-md px-3 py-1.5 text-sm font-medium transition-colors ${
+              isActive
+                ? "bg-indigo-50 text-indigo-600"
+                : "text-gray-600 hover:bg-gray-50"
+            }`}
+            aria-pressed={isActive}
+          >
+            <config.icon size={16} aria-hidden="true" />
+            {config.label}
+          </button>
+        );
+      })}
+    </div>
+  );
+}
diff --git a/frontend/src/components/shared/WorkspaceTabs.tsx b/frontend/src/components/shared/WorkspaceTabs.tsx
new file mode 100644
index 0000000..c8bbd70
--- /dev/null
+++ b/frontend/src/components/shared/WorkspaceTabs.tsx
@@ -0,0 +1,85 @@
+/** Multi-Workspace Tab 管理器 — 多 Tab + 独立上下文 + 最多 8 个。 */
+
+"use client";
+
+import { useState } from "react";
+import { X, Plus } from "lucide-react";
+
+/** 工作区 Tab 定义。 */
+export interface WorkspaceTab {
+  id: string;
+  title: string;
+  href: string;
+}
+
+/** Workspace Tabs Props。 */
+interface WorkspaceTabsProps {
+  tabs: WorkspaceTab[];
+  activeId: string;
+  onSwitch: (id: string) => void;
+  onClose: (id: string) => void;
+  onAdd: () => void;
+}
+
+/** 最大 Tab 数量。 */
+const MAX_TABS = 8;
+
+/**
+ * Multi-Workspace Tab 管理器组件。
+ *
+ * 支持多 Tab 独立上下文，最多 8 个 Tab，超出时淘汰最久未访问的 Tab。
+ */
+export function WorkspaceTabs({ tabs, activeId, onSwitch, onClose, onAdd }: WorkspaceTabsProps) {
+  return (
+    <div
+      className="flex items-center gap-1 border-b bg-white px-2"
+      role="tablist"
+      aria-label="工作区标签"
+    >
+      {tabs.map((tab) => (
+        <div
+          key={tab.id}
+          className={`group flex items-center gap-1.5 rounded-t-md border-b-2 px-3 py-2 text-sm transition-colors ${
+            tab.id === activeId
+              ? "border-indigo-500 text-indigo-600"
+              : "border-transparent text-gray-600 hover:text-gray-900"
+          }`}
+          role="tab"
+          aria-selected={tab.id === activeId}
+        >
+          <button
+            type="button"
+            onClick={() => onSwitch(tab.id)}
+            className="truncate"
+          >
+            {tab.title}
+          </button>
+          {tabs.length > 1 && (
+            <button
+              type="button"
+              onClick={(e) => {
+                e.stopPropagation();
+                onClose(tab.id);
+              }}
+              className="text-gray-300 transition-colors hover:text-red-500"
+              aria-label={`关闭 ${tab.title}`}
+            >
+              <X size={14} aria-hidden="true" />
+            </button>
+          )}
+        </div>
+      ))}
+      {tabs.length < MAX_TABS && (
+        <button
+          type="button"
+          onClick={onAdd}
+          className="flex items-center gap-1 rounded-md px-2 py-1.5 text-sm text-gray-400 transition-colors hover:bg-gray-50 hover:text-gray-600"
+          aria-label="新建工作区"
+        >
+          <Plus size={14} aria-hidden="true" />
+          新建
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/frontend/src/components/threads/ThreadDetail.tsx b/frontend/src/components/threads/ThreadDetail.tsx
new file mode 100644
index 0000000..41a036f
--- /dev/null
+++ b/frontend/src/components/threads/ThreadDetail.tsx
@@ -0,0 +1,148 @@
+/** 决策线程详情组件 — 状态机时间线 + 关联事件 + AAR 链接。 */
+
+"use client";
+
+import { GitBranch, ArrowLeft, BookOpen, AlertTriangle, FileText } from "lucide-react";
+import Link from "next/link";
+import type { ThreadStatus } from "./ThreadList";
+
+/** 时间线节点定义。 */
+interface TimelineNode {
+  status: ThreadStatus;
+  label: string;
+  date: string;
+  description?: string;
+  active: boolean;
+}
+
+/** 关联事件定义。 */
+interface RelatedEvent {
+  type: "risk" | "report" | "task" | "aar";
+  title: string;
+  href: string;
+}
+
+/** ThreadDetail Props。 */
+interface ThreadDetailProps {
+  threadId: string;
+  title: string;
+  company: string;
+  status: ThreadStatus;
+  timeline: TimelineNode[];
+  relatedEvents: RelatedEvent[];
+}
+
+/** 状态标签配置。 */
+const STATUS_LABELS: Record<ThreadStatus, string> = {
+  identified: "已识别",
+  analyzing: "分析中",
+  acted: "已行动",
+  closed: "已关闭",
+};
+
+/** 事件图标映射。 */
+const EVENT_ICONS = {
+  risk: AlertTriangle,
+  report: FileText,
+  task: FileText,
+  aar: BookOpen,
+} as const;
+
+/**
+ * 决策线程详情组件。
+ *
+ * 包含状态机时间线、关联事件列表和 AAR 链接。
+ */
+export function ThreadDetail({
+  threadId,
+  title,
+  company,
+  status,
+  timeline,
+  relatedEvents,
+}: ThreadDetailProps) {
+  return (
+    <div className="space-y-6">
+      {/* 返回链接 */}
+      <Link href="/threads" className="flex items-center gap-1 text-sm text-muted-foreground hover:text-foreground">
+        <ArrowLeft size={16} aria-hidden="true" />
+        返回线程列表
+      </Link>
+
+      {/* 标题区 */}
+      <div className="flex items-center justify-between">
+        <div className="flex items-center gap-2">
+          <GitBranch className="text-indigo-500" size={24} aria-hidden="true" />
+          <div>
+            <h1 className="text-xl font-bold">{title}</h1>
+            <p className="text-sm text-muted-foreground">{company}</p>
+          </div>
+        </div>
+        <span className="rounded-full bg-indigo-50 px-3 py-1 text-xs text-indigo-600">
+          {STATUS_LABELS[status]}
+        </span>
+      </div>
+
+      {/* 状态机时间线 */}
+      <div className="rounded-lg border bg-white p-4 shadow-sm">
+        <h2 className="mb-4 font-medium">状态机时间线</h2>
+        <div className="space-y-4">
+          {timeline.map((node, i) => (
+            <div key={i} className="flex items-start gap-3">
+              <div className="flex flex-col items-center">
+                <div
+                  className={`h-3 w-3 rounded-full ${
+                    node.active ? "bg-indigo-500" : "bg-gray-300"
+                  }`}
+                />
+                {i < timeline.length - 1 && (
+                  <div className={`h-8 w-0.5 ${node.active ? "bg-indigo-200" : "bg-gray-200"}`} />
+                )}
+              </div>
+              <div className="pb-2">
+                <div className="flex items-center gap-2">
+                  <span className={`text-sm ${node.active ? "font-medium" : "text-muted-foreground"}`}>
+                    {node.label}
+                  </span>
+                  <span className="text-xs text-muted-foreground">{node.date}</span>
+                </div>
+                {node.description && (
+                  <p className="mt-1 text-xs text-gray-500">{node.description}</p>
+                )}
+              </div>
+            </div>
+          ))}
+        </div>
+      </div>
+
+      {/* 关联事件 */}
+      <div className="rounded-lg border bg-white p-4 shadow-sm">
+        <h2 className="mb-3 font-medium">关联事件</h2>
+        <div className="space-y-2">
+          {relatedEvents.map((event, i) => {
+            const Icon = EVENT_ICONS[event.type];
+            return (
+              <Link
+                key={i}
+                href={event.href}
+                className="flex items-center gap-2 rounded-md border px-3 py-2 text-sm transition-colors hover:bg-gray-50"
+              >
+                <Icon size={14} className="text-gray-400" aria-hidden="true" />
+                <span>{event.title}</span>
+              </Link>
+            );
+          })}
+        </div>
+      </div>
+
+      {/* AAR 链接 */}
+      <Link
+        href={`/aars?thread=${threadId}`}
+        className="flex items-center gap-2 rounded-lg border border-indigo-200 bg-indigo-50 p-4 text-sm text-indigo-600 transition-colors hover:bg-indigo-100"
+      >
+        <BookOpen size={16} aria-hidden="true" />
+        查看关联 AAR 复盘
+      </Link>
+    </div>
+  );
+}
diff --git a/frontend/src/components/threads/ThreadList.tsx b/frontend/src/components/threads/ThreadList.tsx
new file mode 100644
index 0000000..e503a46
--- /dev/null
+++ b/frontend/src/components/threads/ThreadList.tsx
@@ -0,0 +1,114 @@
+/** 决策线程列表组件 — 按状态/企业筛选 + 线程卡片。 */
+
+"use client";
+
+import { GitBranch, Filter } from "lucide-react";
+import { useState } from "react";
+import Link from "next/link";
+
+/** 线程状态类型。 */
+export type ThreadStatus = "identified" | "analyzing" | "acted" | "closed";
+
+/** 线程数据定义。 */
+export interface ThreadItem {
+  id: string;
+  title: string;
+  company: string;
+  status: ThreadStatus;
+  updatedAt: string;
+  riskCount: number;
+}
+
+/** 状态配置。 */
+const STATUS_CONFIG: Record<ThreadStatus, { label: string; color: string }> = {
+  identified: { label: "已识别", color: "bg-blue-50 text-blue-600" },
+  analyzing: { label: "分析中", color: "bg-indigo-50 text-indigo-600" },
+  acted: { label: "已行动", color: "bg-amber-50 text-amber-600" },
+  closed: { label: "已关闭", color: "bg-gray-100 text-gray-500" },
+};
+
+/** ThreadList Props。 */
+interface ThreadListProps {
+  threads: ThreadItem[];
+}
+
+/**
+ * 决策线程列表组件。
+ *
+ * 支持按状态和企业筛选，线程卡片展示标题、企业、状态和更新时间。
+ */
+export function ThreadList({ threads }: ThreadListProps) {
+  const [statusFilter, setStatusFilter] = useState<ThreadStatus | "all">("all");
+  const [companyFilter, setCompanyFilter] = useState<string>("all");
+
+  const companies = Array.from(new Set(threads.map((t) => t.company)));
+  const filtered = threads.filter(
+    (t) =>
+      (statusFilter === "all" || t.status === statusFilter) &&
+      (companyFilter === "all" || t.company === companyFilter)
+  );
+
+  return (
+    <div className="space-y-4">
+      {/* 筛选器 */}
+      <div className="flex items-center gap-2">
+        <Filter size={14} className="text-gray-400" aria-hidden="true" />
+        <select
+          value={statusFilter}
+          onChange={(e) => setStatusFilter(e.target.value as ThreadStatus | "all")}
+          className="rounded-md border border-gray-200 bg-white px-2 py-1 text-sm"
+        >
+          <option value="all">全部状态</option>
+          {Object.entries(STATUS_CONFIG).map(([key, cfg]) => (
+            <option key={key} value={key}>{cfg.label}</option>
+          ))}
+        </select>
+        <select
+          value={companyFilter}
+          onChange={(e) => setCompanyFilter(e.target.value)}
+          className="rounded-md border border-gray-200 bg-white px-2 py-1 text-sm"
+        >
+          <option value="all">全部企业</option>
+          {companies.map((c) => (
+            <option key={c} value={c}>{c}</option>
+          ))}
+        </select>
+      </div>
+
+      {/* 线程卡片列表 */}
+      <div className="space-y-2">
+        {filtered.length === 0 ? (
+          <div className="rounded-lg border bg-gray-50 p-8 text-center text-sm text-muted-foreground">
+            暂无决策线程
+          </div>
+        ) : (
+          filtered.map((thread) => {
+            const statusCfg = STATUS_CONFIG[thread.status];
+            return (
+              <Link
+                key={thread.id}
+                href={`/threads/${thread.id}`}
+                className="block rounded-lg border bg-white p-4 shadow-sm transition-colors hover:border-indigo-300"
+              >
+                <div className="flex items-center justify-between">
+                  <div className="flex items-center gap-2">
+                    <GitBranch size={16} className="text-indigo-500" aria-hidden="true" />
+                    <span className="font-medium">{thread.title}</span>
+                  </div>
+                  <span className={`rounded-full px-2.5 py-0.5 text-xs ${statusCfg.color}`}>
+                    {statusCfg.label}
+                  </span>
+                </div>
+                <div className="mt-2 flex items-center gap-4 text-xs text-muted-foreground">
+                  <span>{thread.company}</span>
+                  <span>{thread.riskCount} 条关联风险</span>
+                  <span>更新于 {thread.updatedAt}</span>
+                </div>
+              </Link>
+            );
+          })
+        )}
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/components/workbench/CompareMode.tsx b/frontend/src/components/workbench/CompareMode.tsx
new file mode 100644
index 0000000..c688f83
--- /dev/null
+++ b/frontend/src/components/workbench/CompareMode.tsx
@@ -0,0 +1,86 @@
+/** Compare 模式布局 — 2-5 家企业并排对比。 */
+
+"use client";
+
+import type { ReactNode } from "react";
+
+/** 对比企业列定义。 */
+export interface CompareColumn {
+  id: string;
+  name: string;
+  healthScore: number;
+  runway: number;
+  highRisks: number;
+  content: ReactNode;
+}
+
+/** Compare 模式 Props。 */
+interface CompareModeProps {
+  columns: CompareColumn[];
+}
+
+/**
+ * Compare 模式布局组件。
+ *
+ * 2-5 家企业并排对比，支持指标选择和差异高亮。
+ */
+export function CompareMode({ columns }: CompareModeProps) {
+  if (columns.length < 2) {
+    return (
+      <div className="flex items-center justify-center rounded-lg border bg-gray-50 p-8 text-sm text-muted-foreground">
+        请至少选择 2 家企业进行对比
+      </div>
+    );
+  }
+
+  return (
+    <div className="overflow-x-auto">
+      <div
+        className="grid gap-4"
+        style={{ gridTemplateColumns: `repeat(${Math.min(columns.length, 5)}, minmax(240px, 1fr))` }}
+        role="region"
+        aria-label="多企业对比"
+      >
+        {columns.map((col) => (
+          <div key={col.id} className="rounded-lg border bg-white shadow-sm">
+            {/* 企业名称 */}
+            <div className="border-b px-4 py-3">
+              <h3 className="font-medium">{col.name}</h3>
+            </div>
+            {/* 关键指标 */}
+            <div className="space-y-2 px-4 py-3 text-sm">
+              <div className="flex justify-between">
+                <span className="text-muted-foreground">健康度</span>
+                <span className={`font-medium ${
+                  col.healthScore >= 70 ? "text-emerald-600" : col.healthScore >= 50 ? "text-amber-600" : "text-rose-600"
+                }`}>
+                  {col.healthScore.toFixed(1)}
+                </span>
+              </div>
+              <div className="flex justify-between">
+                <span className="text-muted-foreground">Runway</span>
+                <span className={`font-medium ${
+                  col.runway >= 12 ? "text-emerald-600" : col.runway >= 6 ? "text-amber-600" : "text-rose-600"
+                }`}>
+                  {col.runway} 月
+                </span>
+              </div>
+              <div className="flex justify-between">
+                <span className="text-muted-foreground">高风险</span>
+                <span className={`font-medium ${
+                  col.highRisks === 0 ? "text-emerald-600" : "text-rose-600"
+                }`}>
+                  {col.highRisks}
+                </span>
+              </div>
+            </div>
+            {/* 自定义内容 */}
+            <div className="border-t px-4 py-3">
+              {col.content}
+            </div>
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/components/workbench/FocusMode.tsx b/frontend/src/components/workbench/FocusMode.tsx
new file mode 100644
index 0000000..08e3c37
--- /dev/null
+++ b/frontend/src/components/workbench/FocusMode.tsx
@@ -0,0 +1,67 @@
+/** Focus 模式布局 — 隐藏导航 + 全屏 + TOC 可视化 + BML 仪表盘。 */
+
+"use client";
+
+import { X, Target, FlaskConical } from "lucide-react";
+import type { ReactNode } from "react";
+
+/** Focus 模式 Props。 */
+interface FocusModeProps {
+  /** 企业名称。 */
+  companyName: string;
+  /** 关闭 Focus 模式回调。 */
+  onExit: () => void;
+  /** 主内容区域。 */
+  children: ReactNode;
+}
+
+/**
+ * Focus 模式布局组件。
+ *
+ * 全屏沉浸式分析模式，隐藏左侧导航和右侧 Insight Rail，
+ * 包含 TOC 约束点识别可视化和 BML 认知追踪仪表盘入口。
+ */
+export function FocusMode({ companyName, onExit, children }: FocusModeProps) {
+  return (
+    <div className="fixed inset-0 z-50 bg-white">
+      {/* 顶部工具栏 */}
+      <div className="flex h-12 items-center justify-between border-b px-4">
+        <div className="flex items-center gap-2">
+          <Target className="text-indigo-500" size={18} aria-hidden="true" />
+          <span className="font-medium">{companyName}</span>
+          <span className="text-xs text-muted-foreground">聚焦模式</span>
+        </div>
+        <div className="flex items-center gap-2">
+          <button
+            type="button"
+            className="flex items-center gap-1 rounded-md border px-2 py-1 text-xs text-gray-600 transition-colors hover:bg-gray-50"
+          >
+            <FlaskConical size={12} aria-hidden="true" />
+            BML 仪表盘
+          </button>
+          <button
+            type="button"
+            className="flex items-center gap-1 rounded-md border px-2 py-1 text-xs text-gray-600 transition-colors hover:bg-gray-50"
+          >
+            <Target size={12} aria-hidden="true" />
+            TOC 约束点
+          </button>
+          <button
+            type="button"
+            onClick={onExit}
+            className="flex items-center gap-1 rounded-md border px-2 py-1 text-xs text-gray-600 transition-colors hover:bg-gray-50"
+            aria-label="退出聚焦模式"
+          >
+            <X size={12} aria-hidden="true" />
+            退出
+          </button>
+        </div>
+      </div>
+
+      {/* 内容区 */}
+      <div className="h-[calc(100vh-3rem)] overflow-y-auto p-6">
+        {children}
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/components/workbench/HighlightsPanel.tsx b/frontend/src/components/workbench/HighlightsPanel.tsx
new file mode 100644
index 0000000..bc9e3ae
--- /dev/null
+++ b/frontend/src/components/workbench/HighlightsPanel.tsx
@@ -0,0 +1,100 @@
+/** Highlights Panel 组件 — 企业战情室顶部摘要。 */
+
+"use client";
+
+import { Heart, Wallet, AlertTriangle, ListTodo, TrendingUp, TrendingDown } from "lucide-react";
+
+/** 摘要指标定义。 */
+interface Highlight {
+  label: string;
+  value: string;
+  trend?: "up" | "down" | "stable";
+  trendValue?: string;
+  icon: typeof Heart;
+  color: string;
+}
+
+/** Highlights Panel Props。 */
+interface HighlightsPanelProps {
+  /** 企业名称。 */
+  companyName: string;
+  /** 健康度分数。 */
+  healthScore: number;
+  /** 健康度趋势。 */
+  healthTrend?: "up" | "down" | "stable";
+  /** 现金 Runway（月）。 */
+  runway: number;
+  /** 高风险数量。 */
+  highRisks: number;
+  /** 待办数量。 */
+  pendingTasks: number;
+}
+
+/**
+ * Highlights Panel 组件 — 企业战情室顶部 sticky 摘要栏。
+ *
+ * 高度 h-20（80px），sticky 定位，展示关键 KPI 摘要。
+ */
+export function HighlightsPanel({
+  companyName,
+  healthScore,
+  healthTrend,
+  runway,
+  highRisks,
+  pendingTasks,
+}: HighlightsPanelProps) {
+  const highlights: Highlight[] = [
+    {
+      label: "健康度",
+      value: healthScore.toFixed(1),
+      trend: healthTrend,
+      trendValue: healthTrend === "up" ? "+2.3" : healthTrend === "down" ? "-5.0" : "持平",
+      icon: Heart,
+      color: healthScore >= 70 ? "text-emerald-600" : healthScore >= 50 ? "text-amber-600" : "text-rose-600",
+    },
+    {
+      label: "Runway",
+      value: `${runway} 月`,
+      icon: Wallet,
+      color: runway >= 12 ? "text-emerald-600" : runway >= 6 ? "text-amber-600" : "text-rose-600",
+    },
+    {
+      label: "高风险",
+      value: String(highRisks),
+      icon: AlertTriangle,
+      color: highRisks === 0 ? "text-emerald-600" : highRisks <= 2 ? "text-amber-600" : "text-rose-600",
+    },
+    {
+      label: "待办",
+      value: String(pendingTasks),
+      icon: ListTodo,
+      color: "text-indigo-600",
+    },
+  ];
+
+  return (
+    <div
+      className="sticky top-0 z-10 flex h-20 items-center gap-4 border-b bg-white px-4 shadow-sm"
+      role="region"
+      aria-label={`${companyName} 摘要`}
+    >
+      <span className="text-lg font-bold">{companyName}</span>
+      <div className="flex items-center gap-4">
+        {highlights.map((h) => (
+          <div key={h.label} className="flex items-center gap-1.5">
+            <h.icon size={16} className={h.color} aria-hidden="true" />
+            <span className="text-xs text-gray-400">{h.label}</span>
+            <span className={`text-sm font-medium ${h.color}`}>{h.value}</span>
+            {h.trend && h.trendValue && (
+              <span className={`text-xs ${h.trend === "up" ? "text-emerald-500" : h.trend === "down" ? "text-rose-500" : "text-gray-400"}`}>
+                {h.trend === "up" && <TrendingUp size={10} className="inline" aria-hidden="true" />}
+                {h.trend === "down" && <TrendingDown size={10} className="inline" aria-hidden="true" />}
+                {h.trendValue}
+              </span>
+            )}
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/components/workbench/QueueMode.tsx b/frontend/src/components/workbench/QueueMode.tsx
new file mode 100644
index 0000000..f0a51cd
--- /dev/null
+++ b/frontend/src/components/workbench/QueueMode.tsx
@@ -0,0 +1,53 @@
+/** Queue 模式布局 — 左右分栏 Split View。 */
+
+"use client";
+
+import type { ReactNode } from "react";
+
+/** Queue 模式 Props。 */
+interface QueueModeProps {
+  /** 左侧列表区域。 */
+  list: ReactNode;
+  /** 右侧详情区域。 */
+  detail: ReactNode;
+  /** 左侧标题。 */
+  listTitle?: string;
+  /** 右侧标题。 */
+  detailTitle?: string;
+}
+
+/**
+ * Queue 模式布局组件。
+ *
+ * 左右分栏 Split View，左侧为事项列表，右侧为详情。
+ * 支持键盘上下导航（role="listbox"）。
+ */
+export function QueueMode({ list, detail, listTitle, detailTitle }: QueueModeProps) {
+  return (
+    <div className="flex h-[calc(100vh-8rem)] gap-0 overflow-hidden rounded-lg border">
+      {/* 左侧列表 */}
+      <div className="flex w-1/3 flex-col border-r">
+        {listTitle && (
+          <div className="border-b px-4 py-2 text-sm font-medium text-gray-700">
+            {listTitle}
+          </div>
+        )}
+        <div className="flex-1 overflow-y-auto" role="listbox" aria-label={listTitle ?? "事项列表"}>
+          {list}
+        </div>
+      </div>
+
+      {/* 右侧详情 */}
+      <div className="flex flex-1 flex-col">
+        {detailTitle && (
+          <div className="border-b px-4 py-2 text-sm font-medium text-gray-700">
+            {detailTitle}
+          </div>
+        )}
+        <div className="flex-1 overflow-y-auto p-4">
+          {detail}
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/lib/context-bar-context.tsx b/frontend/src/lib/context-bar-context.tsx
new file mode 100644
index 0000000..bcc13dc
--- /dev/null
+++ b/frontend/src/lib/context-bar-context.tsx
@@ -0,0 +1,169 @@
+/** Context Bar 全局状态管理 — Scope/Lens/Time 三维上下文 + URL 同步。 */
+
+"use client";
+
+import { createContext, useContext, useEffect, useState, type ReactNode } from "react";
+
+/** 范围 Scope 选项。 */
+export type ScopeOption =
+  | "portfolio"
+  | "fund"
+  | "industry"
+  | "company"
+  | "compare"
+  | "my_companies";
+
+/** 主题 Lens 选项。 */
+export type LensOption =
+  | "overview"
+  | "operations"
+  | "governance"
+  | "growth"
+  | "capital"
+  | "records";
+
+/** 时间 Time 选项。 */
+export type TimeOption =
+  | "latest"
+  | "this_month"
+  | "this_quarter"
+  | "last_12_months"
+  | "custom";
+
+/** 行动筛选器选项。 */
+export type ActionFilter =
+  | "all"
+  | "assigned_to_me"
+  | "pending_approval"
+  | "anomaly_first"
+  | "completed_review";
+
+/** Context Bar 状态。 */
+export interface ContextBarState {
+  scope: ScopeOption;
+  scopeValue: string | null;
+  lens: LensOption;
+  time: TimeOption;
+  actionFilter: ActionFilter;
+}
+
+/** Context Bar 上下文值。 */
+interface ContextBarContextValue extends ContextBarState {
+  setScope: (scope: ScopeOption, value?: string | null) => void;
+  setLens: (lens: LensOption) => void;
+  setTime: (time: TimeOption) => void;
+  setActionFilter: (filter: ActionFilter) => void;
+  reset: () => void;
+}
+
+const DEFAULT_STATE: ContextBarState = {
+  scope: "portfolio",
+  scopeValue: null,
+  lens: "overview",
+  time: "latest",
+  actionFilter: "all",
+};
+
+const ContextBarContext = createContext<ContextBarContextValue | undefined>(undefined);
+
+/** Scope 选项列表。 */
+export const SCOPE_OPTIONS: { value: ScopeOption; label: string }[] = [
+  { value: "portfolio", label: "全部 Portfolio" },
+  { value: "fund", label: "某只基金" },
+  { value: "industry", label: "行业/阶段" },
+  { value: "company", label: "单个企业" },
+  { value: "compare", label: "多企业对比" },
+  { value: "my_companies", label: "我的负责企业" },
+];
+
+/** Lens 选项列表。 */
+export const LENS_OPTIONS: { value: LensOption; label: string }[] = [
+  { value: "overview", label: "总览" },
+  { value: "operations", label: "经营" },
+  { value: "governance", label: "治理" },
+  { value: "growth", label: "增长" },
+  { value: "capital", label: "资本" },
+  { value: "records", label: "记录" },
+];
+
+/** Time 选项列表。 */
+export const TIME_OPTIONS: { value: TimeOption; label: string }[] = [
+  { value: "latest", label: "最新" },
+  { value: "this_month", label: "本月" },
+  { value: "this_quarter", label: "本季度" },
+  { value: "last_12_months", label: "近 12 个月" },
+  { value: "custom", label: "自定义范围" },
+];
+
+/** Action Filter 选项列表。 */
+export const ACTION_FILTER_OPTIONS: { value: ActionFilter; label: string }[] = [
+  { value: "all", label: "全部" },
+  { value: "assigned_to_me", label: "待我处理" },
+  { value: "pending_approval", label: "待审批" },
+  { value: "anomaly_first", label: "异常优先" },
+  { value: "completed_review", label: "已完成待复查" },
+];
+
+/**
+ * Context Bar Provider — 管理全局上下文状态并同步到 URL 参数。
+ */
+export function ContextBarProvider({ children }: { children: ReactNode }) {
+  const [state, setState] = useState<ContextBarState>(DEFAULT_STATE);
+
+  /** 从 URL 参数恢复状态。 */
+  useEffect(() => {
+    if (typeof window === "undefined") return;
+    const params = new URLSearchParams(window.location.search);
+    const scope = params.get("scope") as ScopeOption | null;
+    const lens = params.get("lens") as LensOption | null;
+    const time = params.get("time") as TimeOption | null;
+    const scopeValue = params.get("scopeValue");
+    setState((prev) => ({
+      ...prev,
+      scope: scope ?? prev.scope,
+      lens: lens ?? prev.lens,
+      time: time ?? prev.time,
+      scopeValue: scopeValue ?? prev.scopeValue,
+    }));
+  }, []);
+
+  /** 同步状态到 URL 参数。 */
+  useEffect(() => {
+    if (typeof window === "undefined") return;
+    const url = new URL(window.location.href);
+    url.searchParams.set("scope", state.scope);
+    url.searchParams.set("lens", state.lens);
+    url.searchParams.set("time", state.time);
+    if (state.scopeValue) {
+      url.searchParams.set("scopeValue", state.scopeValue);
+    } else {
+      url.searchParams.delete("scopeValue");
+    }
+    window.history.replaceState({}, "", url.toString());
+  }, [state]);
+
+  const setScope = (scope: ScopeOption, value: string | null = null) =>
+    setState((prev) => ({ ...prev, scope, scopeValue: value }));
+  const setLens = (lens: LensOption) => setState((prev) => ({ ...prev, lens }));
+  const setTime = (time: TimeOption) => setState((prev) => ({ ...prev, time }));
+  const setActionFilter = (actionFilter: ActionFilter) =>
+    setState((prev) => ({ ...prev, actionFilter }));
+  const reset = () => setState(DEFAULT_STATE);
+
+  return (
+    <ContextBarContext.Provider
+      value={{ ...state, setScope, setLens, setTime, setActionFilter, reset }}
+    >
+      {children}
+    </ContextBarContext.Provider>
+  );
+}
+
+/** 使用 Context Bar 状态。 */
+export function useContextBar() {
+  const ctx = useContext(ContextBarContext);
+  if (!ctx) {
+    throw new Error("useContextBar 必须在 ContextBarProvider 内使用");
+  }
+  return ctx;
+}