diff --git a/src/features/agent/components/agent-collapsed-rail.tsx b/src/features/agent/components/agent-collapsed-rail.tsx
index f3d3a99..a88dc43 100644
--- a/src/features/agent/components/agent-collapsed-rail.tsx
+++ b/src/features/agent/components/agent-collapsed-rail.tsx
@@ -20,7 +20,7 @@ export function AgentCollapsedRail({
     <aside
       aria-label="Agent 折叠栏"
       className={cn(
-        "agent-rail-enter acrylic-panel pointer-events-auto w-[72px] rounded-2xl border p-1.5"
+        "agent-rail-enter surface-dock pointer-events-auto w-[72px] rounded-2xl border p-1.5 shadow-[0_8px_24px_rgba(15,23,42,0.1)]"
       )}
     >
       <button
diff --git a/src/features/agent/components/agent-command-panel.tsx b/src/features/agent/components/agent-command-panel.tsx
index 2be5d4a..a6ed782 100644
--- a/src/features/agent/components/agent-command-panel.tsx
+++ b/src/features/agent/components/agent-command-panel.tsx
@@ -1,6 +1,7 @@
 import {
   Activity,
   CheckCircle2,
+  Clock3,
   ChevronsUpDown,
   ChevronLeft,
   DatabaseZap,
@@ -82,6 +83,13 @@ import type {
 
 export type AgentCommandPanelPresentation = "desktop-dock" | "desktop-floating" | "mobile-sheet";
 
+export type AgentWorkspaceContextItem = {
+  id: string;
+  label: string;
+  value: string;
+  tone?: "neutral" | "info" | "warning";
+};
+
 type AgentCommandPanelProps = {
   presentation?: AgentCommandPanelPresentation;
   collapsing?: boolean;
@@ -99,6 +107,7 @@ type AgentCommandPanelProps = {
   selectedModel?: string;
   approvalMode?: AgentApprovalMode;
   uiResults?: AgentUiResult[];
+  workspaceContext?: AgentWorkspaceContextItem[];
   onCollapse: () => void;
   onRefreshHistory?: () => Promise<void> | void;
   onStartNewSession?: () => Promise<void> | void;
@@ -150,6 +159,7 @@ export function AgentCommandPanel({
   selectedModel = "",
   approvalMode = "request",
   uiResults = [],
+  workspaceContext = [],
   onCollapse,
   onRefreshHistory,
   onStartNewSession,
@@ -302,7 +312,7 @@ export function AgentCommandPanel({
           "pointer-events-auto flex h-full min-h-0 w-full flex-col",
           "agent-panel-shell",
           presentation === "desktop-dock"
-            ? "acrylic-panel overflow-hidden rounded-r-2xl border-y border-r"
+            ? "surface-dock overflow-hidden rounded-r-2xl border-y border-r shadow-[0_12px_32px_rgba(15,23,42,0.12)]"
             : desktopFloating
               ? "acrylic-panel overflow-visible rounded-2xl border"
               : "overflow-hidden rounded-none border-0 bg-transparent",
@@ -423,6 +433,27 @@ export function AgentCommandPanel({
             </header>
           </div>
 
+          {workspaceContext.length > 0 ? (
+            <div className="mx-3 mb-2 flex shrink-0 items-center gap-2 overflow-x-auto rounded-lg bg-slate-900/[0.045] px-2.5 py-2 text-[10px] text-slate-500">
+              <Clock3 size={13} className="shrink-0 text-blue-600" aria-hidden="true" />
+              <span className="shrink-0 font-semibold uppercase tracking-[0.12em] text-slate-500">当前上下文</span>
+              {workspaceContext.map((item) => (
+                <span
+                  key={item.id}
+                  className={cn(
+                    "shrink-0 rounded-md px-2 py-1",
+                    item.tone === "info" && "bg-blue-50 text-blue-700",
+                    item.tone === "warning" && "bg-amber-50 text-amber-700",
+                    (!item.tone || item.tone === "neutral") && "bg-white/70 text-slate-600"
+                  )}
+                  title={`${item.label}：${item.value}`}
+                >
+                  {item.label} · <strong className="font-semibold">{item.value}</strong>
+                </span>
+              ))}
+            </div>
+          ) : null}
+
           {floatingPresentation ? (
             <AnimatePresence initial={false}>
               {hasConversation && !historyOpen ? (
diff --git a/src/features/agent/index.ts b/src/features/agent/index.ts
index fb13b97..287d1a6 100644
--- a/src/features/agent/index.ts
+++ b/src/features/agent/index.ts
@@ -1,7 +1,10 @@
 export { AgentCollapsedRail } from "./components/agent-collapsed-rail";
 export { AgentCommandPanel } from "./components/agent-command-panel";
 export { countPendingAgentInputs, hasPendingAgentInput } from "./message-state";
-export type { AgentCommandPanelPresentation } from "./components/agent-command-panel";
+export type {
+  AgentCommandPanelPresentation,
+  AgentWorkspaceContextItem
+} from "./components/agent-command-panel";
 export { AgentPersona } from "./components/agent-persona";
 export { createAgentApiClient } from "./api/client";
 export type {
diff --git a/src/features/workbench/components/workbench-agent-panels.tsx b/src/features/workbench/components/workbench-agent-panels.tsx
index ef6e148..b699ca1 100644
--- a/src/features/workbench/components/workbench-agent-panels.tsx
+++ b/src/features/workbench/components/workbench-agent-panels.tsx
@@ -1,8 +1,6 @@
 import { AgentCollapsedRail, AgentCommandPanel, AgentPersona } from "@/features/agent";
-import { cn } from "@/shared/ui/cn";
 import { useEffect, type ComponentProps } from "react";
-import { getAgentPanelDefaultWidth, getAgentPanelMaxWidth } from "../layout/workbench-layout";
-import { useAgentPanelResize } from "../hooks/use-agent-panel-resize";
+import { getWorkbenchViewportLayout } from "../layout/workbench-layout";
 
 type AgentPanelProps = Omit<ComponentProps<typeof AgentCommandPanel>, "collapsing" | "onCollapse">;
 
@@ -10,8 +8,6 @@ type WorkbenchAgentPanelsProps = {
   panelProps: AgentPanelProps;
   panelOpen: boolean;
   panelCollapsing: boolean;
-  artifactActive: boolean;
-  conditionExpanded: boolean;
   personaState: ComponentProps<typeof AgentPersona>["state"];
   statusLabel: string;
   viewportWidth: number;
@@ -24,8 +20,6 @@ export function WorkbenchAgentPanels({
   panelProps,
   panelOpen,
   panelCollapsing,
-  artifactActive,
-  conditionExpanded,
   personaState,
   statusLabel,
   viewportWidth,
@@ -33,9 +27,7 @@ export function WorkbenchAgentPanels({
   onExpandPanel,
   onWidthCommit
 }: WorkbenchAgentPanelsProps) {
-  const resize = useAgentPanelResize(viewportWidth, conditionExpanded);
-  const defaultWidth = getAgentPanelDefaultWidth(viewportWidth, conditionExpanded);
-  const committedWidth = resize.committedWidth ?? defaultWidth;
+  const committedWidth = getWorkbenchViewportLayout(viewportWidth).agentWidth;
 
   useEffect(() => {
     onWidthCommit?.(committedWidth);
@@ -43,43 +35,16 @@ export function WorkbenchAgentPanels({
 
   return (
     <div
-      ref={resize.panelRef}
-      className={cn(
-        "pointer-events-none absolute z-50 hidden lg:block",
-        !artifactActive && panelOpen && "workbench-agent-dock",
-        artifactActive && panelOpen
-          ? "bottom-4 left-3 top-20 max-w-[720px]"
-          : "bottom-0 left-0 top-14"
-      )}
-      style={{ width: panelOpen ? resize.width ?? defaultWidth : 72 }}
+      className="pointer-events-none absolute bottom-0 left-0 top-14 z-50 hidden lg:block"
+      style={{ width: panelOpen ? committedWidth : 72 }}
     >
       {panelOpen ? (
-        <>
-          <AgentCommandPanel
-            {...panelProps}
-            presentation={artifactActive ? "desktop-floating" : "desktop-dock"}
-            collapsing={panelCollapsing}
-            onCollapse={onCollapsePanel}
-          />
-          <div
-            aria-label="调整 Agent 面板宽度"
-            aria-orientation="vertical"
-            aria-valuemax={getAgentPanelMaxWidth(viewportWidth, conditionExpanded)}
-            aria-valuemin={defaultWidth}
-            aria-valuenow={Math.round(resize.width ?? defaultWidth)}
-            className={cn(
-              "group pointer-events-auto absolute -right-3 top-4 bottom-4 z-10 flex w-6 cursor-ew-resize touch-none items-center justify-center outline-hidden",
-              resize.resizing && "[&>span]:bg-blue-500 [&>span]:opacity-100"
-            )}
-            role="separator"
-            tabIndex={0}
-            title="拖拽调整 Agent 面板宽度"
-            onKeyDown={resize.handleKeyDown}
-            onPointerDown={resize.handlePointerDown}
-          >
-            <span className="h-14 w-1 rounded-full bg-slate-500/60 opacity-50 shadow-xs transition-[height,background-color,opacity] group-hover:h-20 group-hover:bg-blue-500 group-hover:opacity-100 group-focus-visible:h-20 group-focus-visible:bg-blue-500 group-focus-visible:opacity-100" />
-          </div>
-        </>
+        <AgentCommandPanel
+          {...panelProps}
+          presentation="desktop-dock"
+          collapsing={panelCollapsing}
+          onCollapse={onCollapsePanel}
+        />
       ) : (
         <div className="h-full bg-[#e8eef4] px-1.5 pt-5 shadow-[1px_0_0_rgba(15,23,42,0.08)]">
           <AgentCollapsedRail
diff --git a/src/features/workbench/components/workbench-top-bar.tsx b/src/features/workbench/components/workbench-top-bar.tsx
index f738257..dad9a4f 100644
--- a/src/features/workbench/components/workbench-top-bar.tsx
+++ b/src/features/workbench/components/workbench-top-bar.tsx
@@ -28,6 +28,7 @@ export type WorkbenchTopBarProps = {
   alerts: WorkbenchAlert[];
   user: WorkbenchUser;
   conditionFeedVisible: boolean;
+  timelineVisible: boolean;
   taskTickerAvailable: boolean;
   taskTickerVisible: boolean;
   devPanelEnabled: boolean;
@@ -35,6 +36,7 @@ export type WorkbenchTopBarProps = {
   onSelectScenario: (scenarioId: string) => void;
   onSelectAlert: (alert: WorkbenchAlert) => void;
   onToggleConditionFeed: () => void;
+  onToggleTimeline: () => void;
   onToggleTaskTicker: () => void;
   onToggleDevPanel: () => void;
   onPreviewScenario: () => void;
@@ -59,6 +61,7 @@ export function WorkbenchTopBar({
   alerts,
   user,
   conditionFeedVisible,
+  timelineVisible,
   taskTickerAvailable,
   taskTickerVisible,
   devPanelEnabled,
@@ -66,6 +69,7 @@ export function WorkbenchTopBar({
   onSelectScenario,
   onSelectAlert,
   onToggleConditionFeed,
+  onToggleTimeline,
   onToggleTaskTicker,
   onToggleDevPanel,
   onPreviewScenario,
@@ -144,6 +148,12 @@ export function WorkbenchTopBar({
       </div>
 
       <div className="flex shrink-0 items-center gap-2">
+        <div className="lg:hidden">
+          <TimelineToggle compact visible={timelineVisible} onToggle={onToggleTimeline} />
+        </div>
+        <div className="hidden lg:block">
+          <TimelineToggle visible={timelineVisible} onToggle={onToggleTimeline} />
+        </div>
         {onCreateTestAnalysis ? (
           <div className="hidden lg:block">
             <button
@@ -257,6 +267,33 @@ function ConditionFeedToggle({ visible, onToggle }: { visible: boolean; onToggle
   );
 }
 
+function TimelineToggle({
+  visible,
+  compact = false,
+  onToggle
+}: {
+  visible: boolean;
+  compact?: boolean;
+  onToggle: () => void;
+}) {
+  return (
+    <button
+      type="button"
+      aria-label={visible ? "隐藏运行时间轴" : "显示运行时间轴"}
+      aria-pressed={visible}
+      data-selection-tone="soft"
+      title={visible ? "隐藏运行时间轴" : "显示运行时间轴"}
+      onClick={onToggle}
+      className={cn("group", compact ? "px-1.5" : "px-2", headerControlButtonClassName)}
+    >
+      <span className={headerControlIconClassName}>
+        <Clock3 size={14} aria-hidden="true" />
+      </span>
+      {!compact ? <span className={compactHeaderTextClassName}>时间轴</span> : null}
+    </button>
+  );
+}
+
 function HeaderReadout({
   icon: Icon,
   label,
diff --git a/src/features/workbench/hooks/use-workbench-responsive-layout.ts b/src/features/workbench/hooks/use-workbench-responsive-layout.ts
index d2ed4dc..d863406 100644
--- a/src/features/workbench/hooks/use-workbench-responsive-layout.ts
+++ b/src/features/workbench/hooks/use-workbench-responsive-layout.ts
@@ -6,7 +6,7 @@ const CONDITION_FEED_EXIT_MS = 170;
 const CONDITION_FEED_EXPANDED_MIN_WIDTH = 1440;
 const LARGE_SCREEN_QUERY = "(min-width: 1024px)";
 
-type WorkbenchMobileSheet = "agent" | "condition" | null;
+type WorkbenchMobileSheet = "agent" | "condition" | "timeline" | null;
 
 type UseWorkbenchResponsiveLayoutOptions = {
   activeToolOpen: boolean;
@@ -146,6 +146,12 @@ export function useWorkbenchResponsiveLayout({
     }
   }
 
+  function openTimelineForViewport() {
+    if (isLargeScreen) return;
+    setMobileSheet("timeline");
+    setMobileSheetSnap("half");
+  }
+
   const leftPanelOpen = isLargeScreen && agentPanelOpen;
   const rightPanelOpen = isLargeScreen && (devPanelOpen || shouldShowConditionFeed);
   const rightPanelExpanded =
@@ -163,6 +169,7 @@ export function useWorkbenchResponsiveLayout({
     mobileSheetSnap,
     openAgentPanelForViewport,
     openConditionFeedForViewport,
+    openTimelineForViewport,
     rightPanelExpanded,
     rightPanelOpen,
     setAgentPanelWidth,
diff --git a/src/features/workbench/index.ts b/src/features/workbench/index.ts
index 6ca8f4b..6634604 100644
--- a/src/features/workbench/index.ts
+++ b/src/features/workbench/index.ts
@@ -28,3 +28,11 @@ export type {
   ArtifactViewMode,
   WorkbenchSurfaceMode
 } from "./workspace/workspace-model";
+export type {
+  OperationalEvent,
+  OperationalEventImportance,
+  OperationalEventLane,
+  OperationalEventStatus,
+  OperationalTimelineMode
+} from "./operational-timeline/operational-timeline-model";
+export type { WorkspaceContext, WorkspaceTimeRange } from "./workspace/workspace-context";
diff --git a/src/features/workbench/map-workbench-page.tsx b/src/features/workbench/map-workbench-page.tsx
index 1c2390b..a9a0921 100644
--- a/src/features/workbench/map-workbench-page.tsx
+++ b/src/features/workbench/map-workbench-page.tsx
@@ -2,20 +2,22 @@ import {
   useCallback,
   useEffect,
   useMemo,
+  useReducer,
   useRef,
   useState,
   type ComponentProps,
   type CSSProperties
 } from "react";
 import { AnimatePresence, motion, useReducedMotion } from "motion/react";
-import { CalendarClock } from "lucide-react";
+import { CalendarClock, Clock3 } from "lucide-react";
 import {
   AgentCommandPanel,
   AgentPersona,
   toTrustedMapAction,
   type FrontendActionRequest,
   type UIEnvelopePayload,
-  type AgentUiResult
+  type AgentUiResult,
+  type AgentWorkspaceContextItem
 } from "@/features/agent";
 import {
   MapErrorNotice,
@@ -36,6 +38,13 @@ import { MobileWorkbenchSheet } from "./components/mobile-workbench-sheet";
 import { FeaturePopover } from "./components/feature-popover";
 import { ScheduledConditionFeed } from "./components/scheduled-condition-feed";
 import { WorkbenchAgentPanels } from "./components/workbench-agent-panels";
+import { OperationalTimeline } from "./operational-timeline/operational-timeline";
+import {
+  createOperationalEvents,
+  getOperationalEventSummary,
+  type OperationalEvent,
+  type OperationalTimelineMode
+} from "./operational-timeline/operational-timeline-model";
 import {
   ToolbarPanel,
   type ExportViewPreset,
@@ -47,6 +56,10 @@ import {
   WorkbenchMainFrame
 } from "./workspace/workbench-main-frame";
 import { useArtifactWorkspace } from "./workspace/use-artifact-workspace";
+import {
+  createInitialWorkspaceContext,
+  reduceWorkspaceContext
+} from "./workspace/workspace-context";
 import { WORKBENCH_SCENARIOS, WORKBENCH_USER } from "./data/workbench-session";
 import { useWorkbenchAgent } from "./hooks/use-workbench-agent";
 import { useWorkbenchDrawing, type WorkbenchDrawMode } from "./hooks/use-workbench-drawing";
@@ -163,6 +176,7 @@ export function MapWorkbenchPage({
     mobileSheetSnap,
     openAgentPanelForViewport,
     openConditionFeedForViewport,
+    openTimelineForViewport,
     rightPanelExpanded,
     rightPanelOpen,
     setAgentPanelWidth,
@@ -178,18 +192,41 @@ export function MapWorkbenchPage({
     expandAgentPanel,
     onClearActiveTool: clearActiveTool
   });
-  const artifactWorkspace = useArtifactWorkspace(viewportWidth);
+  const currentAgentWidth = leftPanelOpen
+    ? agentPanelWidth
+    : WORKBENCH_LAYOUT.collapsedAgentWidth;
+  const businessWorkspaceWidth = Math.max(0, viewportWidth - currentAgentWidth);
+  const artifactWorkspace = useArtifactWorkspace(businessWorkspaceWidth);
   const artifactActive = artifactWorkspace.activeArtifact !== null;
-  const agentOverlaysWorkspace = artifactActive && leftPanelOpen;
+  const [timelineMode, setTimelineMode] = useState<OperationalTimelineMode>("compact");
+  const [timelineVisible, setTimelineVisible] = useState(true);
+  const [workspaceContext, dispatchWorkspaceContext] = useReducer(
+    reduceWorkspaceContext,
+    undefined,
+    () => createInitialWorkspaceContext()
+  );
+  const operationalEvents = useMemo(
+    () => createOperationalEvents(scheduledConditions),
+    [scheduledConditions]
+  );
+  const operationalSummary = useMemo(
+    () => getOperationalEventSummary(operationalEvents),
+    [operationalEvents]
+  );
 
   useEffect(() => {
-    if (artifactActive) {
-      collapseAgentPanel();
-      setDetailFeature(null);
-      return;
-    }
-    expandAgentPanel();
-  }, [artifactActive, collapseAgentPanel, expandAgentPanel]);
+    setTimelineMode((current) => {
+      if (artifactWorkspace.surfaceMode === "focus") return "summary";
+      return current === "summary" ? "compact" : current;
+    });
+  }, [artifactWorkspace.surfaceMode]);
+
+  useEffect(() => {
+    dispatchWorkspaceContext({
+      type: "sync-artifact",
+      artifact: artifactWorkspace.activeArtifact
+    });
+  }, [artifactWorkspace.activeArtifact]);
 
   function openAgentWorkspaceForViewport() {
     openAgentPanelForViewport();
@@ -203,6 +240,13 @@ export function MapWorkbenchPage({
     toggleConditionFeedForViewport();
   }
 
+  function toggleTimelineVisibility() {
+    setTimelineVisible((current) => {
+      if (current && mobileSheet === "timeline") closeMobileSheet();
+      return !current;
+    });
+  }
+
   const { mapRef, mapReady, mapError, sourceStatuses, fitNetworkBounds } = useWorkbenchMap({
     containerRef: mapContainerRef,
     impactVisible,
@@ -212,7 +256,7 @@ export function MapWorkbenchPage({
   const { controller: mapController, state: mapControllerState } = useWorkbenchMapController({
     mapRef,
     mapReady,
-    leftPanelOpen: agentOverlaysWorkspace,
+    leftPanelOpen: false,
     rightPanelOpen,
     conditionPanelExpanded: rightPanelExpanded,
     agentPanelWidth
@@ -308,6 +352,54 @@ export function MapWorkbenchPage({
     setConditionFocusRequest((current) => (current?.requestId === requestId ? null : current));
   }, []);
 
+  const handleSelectOperationalEvent = useCallback((event: OperationalEvent) => {
+    dispatchWorkspaceContext({
+      type: "select-operational-event",
+      eventId: event.id,
+      cursorTime: event.cursorTime
+    });
+
+    const mapTarget = event.mapTargets[0];
+    if (mapTarget) {
+      dispatchWorkspaceContext({
+        type: "select-spatial-feature",
+        featureId: mapTarget.featureId,
+        sourceId: mapTarget.sourceId
+      });
+      void mapController.locateAndHighlight(mapTarget).then(() => {
+        if (mapController.getSnapshot().errorCode) {
+          showMapNotice({
+            tone: "warning",
+            title: "已选择运行事件",
+            message: "关联要素当前不可定位，事件与工况报告仍可继续查看。"
+          });
+        }
+      });
+    }
+
+    if (event.conditionId) {
+      setSelectedConditionId(event.conditionId);
+      setConditionFocusRequest((current) => ({
+        conditionId: event.conditionId!,
+        requestId: (current?.requestId ?? 0) + 1
+      }));
+      openConditionFeedForViewport();
+      handleConditionExpandedChange(true);
+    }
+  }, [handleConditionExpandedChange, mapController, openConditionFeedForViewport]);
+
+  const handleClearOperationalSelection = useCallback(() => {
+    dispatchWorkspaceContext({ type: "clear-operational-event" });
+    dispatchWorkspaceContext({ type: "clear-spatial-feature" });
+    mapController.clearHighlight();
+  }, [mapController]);
+
+  const handleReturnOperationalNow = useCallback(() => {
+    dispatchWorkspaceContext({ type: "return-operational-now", now: new Date().toISOString() });
+    dispatchWorkspaceContext({ type: "clear-spatial-feature" });
+    mapController.clearHighlight();
+  }, [mapController]);
+
   const toolbarItems = useMemo<MapToolbarItem[]>(
     () =>
       waterNetworkToolbarItems.map((item) => ({
@@ -635,7 +727,7 @@ export function MapWorkbenchPage({
         zoom: trustedAction.zoom ?? Math.max(map.getZoom(), 14),
         padding: getResponsiveWorkbenchPadding(
           map,
-          agentOverlaysWorkspace,
+          false,
           rightPanelOpen,
           rightPanelExpanded,
           agentPanelWidth
@@ -753,6 +845,35 @@ export function MapWorkbenchPage({
     onShowShortcuts: handleShowShortcuts,
     onExportConfig: handleExportConfig
   };
+  const selectedOperationalEvent = operationalEvents.find(
+    (event) => event.id === workspaceContext.operational.selectedEventId
+  ) ?? null;
+  const agentWorkspaceContext = useMemo<AgentWorkspaceContextItem[]>(() => {
+    const items: AgentWorkspaceContextItem[] = [{
+      id: "operational-time",
+      label: "运行时点",
+      value: formatContextClock(workspaceContext.operational.cursorTime),
+      tone: selectedOperationalEvent?.lane === "exception" ? "warning" : "neutral"
+    }];
+
+    if (workspaceContext.spatial.featureId) {
+      items.push({
+        id: "spatial-feature",
+        label: "地图要素",
+        value: workspaceContext.spatial.featureId,
+        tone: "info"
+      });
+    }
+    if (artifactWorkspace.activeArtifact) {
+      items.push({
+        id: "analytical-artifact",
+        label: "分析成果",
+        value: artifactWorkspace.activeArtifact.title,
+        tone: "info"
+      });
+    }
+    return items;
+  }, [artifactWorkspace.activeArtifact, selectedOperationalEvent?.lane, workspaceContext]);
   const agentPanelProps: Omit<
     ComponentProps<typeof AgentCommandPanel>,
     "collapsing" | "onCollapse"
@@ -771,6 +892,7 @@ export function MapWorkbenchPage({
     selectedModel: agent.selectedModel,
     approvalMode: agent.approvalMode,
     uiResults: activeAgentUiResults,
+    workspaceContext: agentWorkspaceContext,
     onRefreshHistory: agent.refreshSessionHistory,
     onStartNewSession: handleStartNewAgentSession,
     onLoadHistorySession: handleLoadAgentHistorySession,
@@ -792,12 +914,17 @@ export function MapWorkbenchPage({
       style={
         {
           ...WORKBENCH_LAYOUT_CSS_VARIABLES,
-          "--workbench-agent-current-width": `${
-            artifactActive
-              ? WORKBENCH_LAYOUT.collapsedAgentWidth
-              : leftPanelOpen
-                ? agentPanelWidth
-                : WORKBENCH_LAYOUT.collapsedAgentWidth
+          "--workbench-agent-current-width": `${currentAgentWidth}px`,
+          "--workbench-timeline-height": `${
+            !timelineVisible
+              ? 0
+              : !isLargeScreen
+                ? 48
+                : timelineMode === "expanded"
+                  ? 240
+                  : timelineMode === "summary"
+                    ? 52
+                    : 72
           }px`
         } as CSSProperties
       }
@@ -810,6 +937,7 @@ export function MapWorkbenchPage({
         alerts={workbenchAlerts}
         user={user}
         conditionFeedVisible={isLargeScreen ? shouldShowConditionFeed : mobileSheet === "condition"}
+        timelineVisible={timelineVisible}
         taskTickerAvailable={taskTickerAvailable}
         taskTickerVisible={taskTickerVisible}
         devPanelEnabled={devPanelEnabled}
@@ -817,6 +945,7 @@ export function MapWorkbenchPage({
         onSelectScenario={handleSelectScenario}
         onSelectAlert={handleSelectAlert}
         onToggleConditionFeed={toggleConditionWorkspaceForViewport}
+        onToggleTimeline={toggleTimelineVisibility}
         onToggleTaskTicker={() => setTaskTickerVisible((current) => !current)}
         onToggleDevPanel={() => setDevPanelOpen((current) => !current)}
         onPreviewScenario={handlePreviewScenario}
@@ -841,6 +970,36 @@ export function MapWorkbenchPage({
         onSetArtifactView={artifactWorkspace.setView}
         onCollapseArtifact={artifactWorkspace.collapseArtifact}
         onDestroyArtifact={artifactWorkspace.destroyArtifact}
+        timelineMode={timelineMode}
+        timelineContent={(
+          timelineVisible ? <>
+            <div className="hidden lg:block">
+              <OperationalTimeline
+                date={workspaceContext.operational.date}
+                cursorTime={workspaceContext.operational.cursorTime}
+                events={operationalEvents}
+                mode={timelineMode}
+                selectedEventId={workspaceContext.operational.selectedEventId}
+                onModeChange={setTimelineMode}
+                onSelectEvent={handleSelectOperationalEvent}
+                onClearSelection={handleClearOperationalSelection}
+                onReturnNow={handleReturnOperationalNow}
+              />
+            </div>
+            <button
+              type="button"
+              onClick={openTimelineForViewport}
+              className="acrylic-control flex h-12 w-full items-center gap-2 rounded-2xl border px-3 text-left text-xs text-slate-700 lg:hidden"
+            >
+              <Clock3 size={15} className="text-blue-600" aria-hidden="true" />
+              <span className="font-semibold">运行时间轴</span>
+              <span className="text-slate-500">计划 {operationalSummary.planned}</span>
+              <span className="text-slate-500">执行 {operationalSummary.active}</span>
+              <span className="text-amber-700">异常 {operationalSummary.exceptions}</span>
+              <span className="ml-auto text-slate-500">查看全天</span>
+            </button>
+          </> : null
+        )}
         mapContent={(
           <div
             ref={mapContainerRef}
@@ -857,7 +1016,7 @@ export function MapWorkbenchPage({
             <div className="pointer-events-auto absolute right-16 top-3 hidden lg:block">
               <ToolbarPanel {...toolbarPanelProps} />
             </div>
-            <div className="absolute bottom-0 right-0 flex flex-col items-end gap-2">
+            <div className="absolute bottom-[calc(var(--workbench-timeline-height)+1rem)] right-0 flex flex-col items-end gap-2">
               <div className="flex items-end gap-2 pr-2">
                 <MapZoom mapRef={mapRef} mapReady={mapReady} onHome={fitNetworkBounds} />
               </div>
@@ -871,8 +1030,6 @@ export function MapWorkbenchPage({
         panelProps={agentPanelProps}
         panelOpen={agent.panelOpen}
         panelCollapsing={agent.panelCollapsing}
-        artifactActive={artifactActive}
-        conditionExpanded={shouldShowConditionFeed && conditionFeedExpanded}
         personaState={agent.personaState}
         statusLabel={agent.statusLabel}
         viewportWidth={viewportWidth}
@@ -882,7 +1039,7 @@ export function MapWorkbenchPage({
       />
 
       {conditionFeedMounted && !devPanelOpen ? (
-        <div className="absolute bottom-14 right-16 top-24 z-50 hidden lg:block 2xl:[--workbench-condition-width:var(--workbench-condition-width-wide)]">
+        <div className="absolute bottom-[calc(var(--workbench-timeline-height)+1.25rem)] right-16 top-24 z-50 hidden lg:block 2xl:[--workbench-condition-width:var(--workbench-condition-width-wide)]">
           <ScheduledConditionFeed
             presentation="desktop-floating"
             conditions={scheduledConditions}
@@ -942,7 +1099,7 @@ export function MapWorkbenchPage({
         ) : null}
       </AnimatePresence>
 
-      <div className={`absolute z-30 lg:hidden ${artifactWorkspace.surfaceMode === "focus" ? "bottom-[4.25rem] right-3" : "bottom-3 left-3 right-3"}`}>
+      <div className={`absolute z-30 lg:hidden ${timelineVisible ? "bottom-[4.25rem]" : "bottom-3"} ${artifactWorkspace.surfaceMode === "focus" ? "right-3" : "left-3 right-3"}`}>
         {mobileSheet === null ? (
           <div className="flex items-center justify-center gap-2">
             <button
@@ -976,7 +1133,13 @@ export function MapWorkbenchPage({
 
       {mobileSheet ? (
         <MobileWorkbenchSheet
-          label={mobileSheet === "agent" ? "Agent 工作台抽屉" : "工况任务抽屉"}
+          label={
+            mobileSheet === "agent"
+              ? "Agent 工作台抽屉"
+              : mobileSheet === "timeline"
+                ? "运行时间轴抽屉"
+                : "工况任务抽屉"
+          }
           snap={mobileSheetSnap}
           onSnapChange={setMobileSheetSnap}
           onClose={closeMobileSheet}
@@ -987,6 +1150,18 @@ export function MapWorkbenchPage({
               presentation="mobile-sheet"
               onCollapse={closeMobileSheet}
             />
+          ) : mobileSheet === "timeline" ? (
+            <OperationalTimeline
+              mobile
+              date={workspaceContext.operational.date}
+              cursorTime={workspaceContext.operational.cursorTime}
+              events={operationalEvents}
+              mode="expanded"
+              selectedEventId={workspaceContext.operational.selectedEventId}
+              onSelectEvent={handleSelectOperationalEvent}
+              onClearSelection={handleClearOperationalSelection}
+              onReturnNow={handleReturnOperationalNow}
+            />
           ) : (
             <ScheduledConditionFeed
               presentation="mobile-sheet"
@@ -1059,3 +1234,11 @@ function getExportPresetLabel(preset: ExportViewPreset) {
 
   return "当前分辨率";
 }
+
+function formatContextClock(value: string) {
+  return new Intl.DateTimeFormat("zh-CN", {
+    hour: "2-digit",
+    minute: "2-digit",
+    hour12: false
+  }).format(new Date(value));
+}
diff --git a/src/features/workbench/operational-timeline/operational-timeline-model.test.ts b/src/features/workbench/operational-timeline/operational-timeline-model.test.ts
new file mode 100644
index 0000000..ca0c165
--- /dev/null
+++ b/src/features/workbench/operational-timeline/operational-timeline-model.test.ts
@@ -0,0 +1,42 @@
+import { describe, expect, it } from "vitest";
+import type { ScheduledConditionItem } from "../types";
+import { clusterOperationalEvents, createOperationalEvents } from "./operational-timeline-model";
+
+const workOrder: ScheduledConditionItem = {
+  id: "work-1", kind: "work_order", code: "WO-1", scheduledAt: "2026-08-19T10:00:00.000Z",
+  title: "阀门调整", summary: "调整阀门", status: "running", riskLevel: "attention", updatedAt: 1,
+  durationMinutes: 40, source: "调度方案", location: "边界阀门 BV-07", dispatcher: "调度",
+  assignee: "班组", priority: "urgent", replyWindowMinutes: 20, stages: [], replyRequirements: []
+};
+
+describe("operational timeline model", () => {
+  it("creates linked plan and actual events for active work orders", () => {
+    const events = createOperationalEvents([workOrder]);
+    expect(events.map((event) => event.lane)).toEqual(["plan", "actual"]);
+    expect(events[0].correlationId).toBe(events[1].correlationId);
+  });
+
+  it("only promotes abnormal condition runs into exception events", () => {
+    const normal = {
+      id: "condition-normal", kind: "condition", taskId: "scada-diagnosis", sessionId: "s-1",
+      scheduledAt: "2026-08-19T10:00:00.000Z", title: "诊断", summary: "正常", status: "completed",
+      riskLevel: "normal", updatedAt: 1
+    } satisfies ScheduledConditionItem;
+    const abnormal = { ...normal, id: "condition-error", status: "error", riskLevel: "critical" } satisfies ScheduledConditionItem;
+
+    expect(createOperationalEvents([normal])).toHaveLength(0);
+    expect(createOperationalEvents([abnormal])[0].lane).toBe("exception");
+  });
+
+  it("aggregates nearby events into ten minute lane buckets", () => {
+    const events = createOperationalEvents([workOrder]);
+    const nearbyPlan = {
+      ...events[0],
+      id: "plan-nearby",
+      cursorTime: "2026-08-19T10:05:00.000Z"
+    };
+    const clusters = clusterOperationalEvents([...events, nearbyPlan], 10);
+    expect(clusters).toHaveLength(2);
+    expect(clusters.find((cluster) => cluster.lane === "plan")?.events).toHaveLength(2);
+  });
+});
diff --git a/src/features/workbench/operational-timeline/operational-timeline-model.ts b/src/features/workbench/operational-timeline/operational-timeline-model.ts
new file mode 100644
index 0000000..b7d8882
--- /dev/null
+++ b/src/features/workbench/operational-timeline/operational-timeline-model.ts
@@ -0,0 +1,159 @@
+import type { FeatureTarget } from "../map/workbench-map-controller";
+import type { ScheduledConditionItem, ScheduledConditionRecord, ScheduledWorkOrderItem } from "../types";
+
+export type OperationalTimelineMode = "compact" | "expanded" | "summary";
+export type OperationalEventLane = "plan" | "actual" | "exception";
+export type OperationalEventStatus = "planned" | "executed" | "delayed" | "failed" | "cancelled";
+export type OperationalEventImportance = "normal" | "important" | "critical";
+
+export type OperationalEvent = {
+  id: string;
+  title: string;
+  description: string;
+  lane: OperationalEventLane;
+  status: OperationalEventStatus;
+  importance: OperationalEventImportance;
+  plannedTime: string | null;
+  actualTime: string | null;
+  cursorTime: string;
+  correlationId: string | null;
+  scheduleId: string;
+  conditionId: string | null;
+  sourceLabel: string;
+  mapTargets: FeatureTarget[];
+};
+
+export type OperationalEventCluster = {
+  id: string;
+  lane: OperationalEventLane;
+  bucketStart: number;
+  events: OperationalEvent[];
+};
+
+export function createOperationalEvents(items: ScheduledConditionItem[]): OperationalEvent[] {
+  return items.flatMap((item) =>
+    item.kind === "work_order" ? createWorkOrderEvents(item) : createConditionEvents(item)
+  ).sort((left, right) => Date.parse(left.cursorTime) - Date.parse(right.cursorTime));
+}
+
+export function clusterOperationalEvents(
+  events: OperationalEvent[],
+  bucketMinutes = 10
+): OperationalEventCluster[] {
+  const bucketMs = bucketMinutes * 60_000;
+  const clusters = new Map<string, OperationalEventCluster>();
+
+  events.forEach((event) => {
+    const timestamp = Date.parse(event.cursorTime);
+    const bucketStart = Math.floor(timestamp / bucketMs) * bucketMs;
+    const key = `${event.lane}-${bucketStart}`;
+    const cluster = clusters.get(key) ?? {
+      id: key,
+      lane: event.lane,
+      bucketStart,
+      events: []
+    };
+    cluster.events.push(event);
+    clusters.set(key, cluster);
+  });
+
+  return [...clusters.values()].sort((left, right) => left.bucketStart - right.bucketStart);
+}
+
+export function getOperationalEventSummary(events: OperationalEvent[]) {
+  return {
+    planned: events.filter((event) => event.lane === "plan").length,
+    active: events.filter((event) => event.lane === "actual").length,
+    exceptions: events.filter((event) => event.lane === "exception").length,
+    critical: events.filter((event) => event.importance === "critical").length
+  };
+}
+
+function createConditionEvents(item: ScheduledConditionRecord): OperationalEvent[] {
+  if (item.status !== "warning" && item.status !== "error") {
+    return [];
+  }
+
+  return [{
+    id: `exception-${item.id}`,
+    title: item.title,
+    description: item.report?.conclusion ?? item.summary,
+    lane: "exception",
+    status: item.status === "error" ? "failed" : "delayed",
+    importance: item.status === "error" ? "critical" : "important",
+    plannedTime: item.scheduledAt,
+    actualTime: item.scheduledAt,
+    cursorTime: item.scheduledAt,
+    correlationId: item.sessionId,
+    scheduleId: item.taskId,
+    conditionId: item.id,
+    sourceLabel: "工况诊断",
+    mapTargets: getConditionMapTargets(item)
+  }];
+}
+
+function createWorkOrderEvents(item: ScheduledWorkOrderItem): OperationalEvent[] {
+  const planEvent: OperationalEvent = {
+    id: `plan-${item.id}`,
+    title: item.title,
+    description: `${item.location} · ${item.assignee}`,
+    lane: "plan",
+    status: "planned",
+    importance: item.priority === "urgent" ? "important" : "normal",
+    plannedTime: item.scheduledAt,
+    actualTime: null,
+    cursorTime: item.scheduledAt,
+    correlationId: item.code,
+    scheduleId: item.id,
+    conditionId: item.id,
+    sourceLabel: item.source,
+    mapTargets: getWorkOrderMapTargets(item)
+  };
+
+  if (item.status === "pending") {
+    return [planEvent];
+  }
+
+  const start = Date.parse(item.scheduledAt);
+  const actualTime = new Date(
+    item.status === "running" ? start + 3 * 60_000 : start + (item.durationMinutes ?? 0) * 60_000
+  ).toISOString();
+  const actualEvent: OperationalEvent = {
+    ...planEvent,
+    id: `actual-${item.id}`,
+    lane: "actual",
+    status: "executed",
+    actualTime,
+    cursorTime: actualTime,
+    description:
+      item.status === "running"
+        ? `${item.assignee}正在执行，位置：${item.location}`
+        : `${item.assignee}已完成现场执行，等待调度复令`
+  };
+
+  return [planEvent, actualEvent];
+}
+
+function getConditionMapTargets(item: ScheduledConditionRecord): FeatureTarget[] {
+  if (item.taskId === "scada-diagnosis") {
+    return [{ sourceId: "scada", featureId: "SCADA-07" }];
+  }
+  if (item.taskId === "pump-energy") {
+    return [{ sourceId: "junctions", featureId: "PUMP-02" }];
+  }
+  return [];
+}
+
+function getWorkOrderMapTargets(item: ScheduledWorkOrderItem): FeatureTarget[] {
+  if (item.location.includes("阀")) {
+    return [{ sourceId: "valves", featureId: extractAssetId(item.location) }];
+  }
+  if (item.location.includes("流量计")) {
+    return [{ sourceId: "scada", featureId: extractAssetId(item.location) }];
+  }
+  return [];
+}
+
+function extractAssetId(location: string) {
+  return location.match(/[A-Z]{1,3}-\d{1,3}/)?.[0] ?? location;
+}
diff --git a/src/features/workbench/operational-timeline/operational-timeline.tsx b/src/features/workbench/operational-timeline/operational-timeline.tsx
new file mode 100644
index 0000000..0f6f321
--- /dev/null
+++ b/src/features/workbench/operational-timeline/operational-timeline.tsx
@@ -0,0 +1,402 @@
+import {
+  CalendarClock,
+  Check,
+  ChevronDown,
+  ChevronUp,
+  Clock3,
+  OctagonAlert,
+  RotateCcw,
+  TriangleAlert
+} from "lucide-react";
+import { cn } from "@/shared/ui/cn";
+import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from "@/shared/ui/tooltip";
+import {
+  clusterOperationalEvents,
+  getOperationalEventSummary,
+  type OperationalEvent,
+  type OperationalEventCluster,
+  type OperationalEventLane,
+  type OperationalTimelineMode
+} from "./operational-timeline-model";
+
+type OperationalTimelineProps = {
+  date: string;
+  cursorTime: string;
+  events: OperationalEvent[];
+  mode: OperationalTimelineMode;
+  selectedEventId: string | null;
+  mobile?: boolean;
+  onModeChange?: (mode: OperationalTimelineMode) => void;
+  onSelectEvent: (event: OperationalEvent) => void;
+  onClearSelection: () => void;
+  onReturnNow: () => void;
+};
+
+const LANES: Array<{ id: OperationalEventLane; label: string }> = [
+  { id: "plan", label: "计划" },
+  { id: "actual", label: "实际" },
+  { id: "exception", label: "异常" }
+];
+
+export function OperationalTimeline({
+  date,
+  cursorTime,
+  events,
+  mode,
+  selectedEventId,
+  mobile = false,
+  onModeChange,
+  onSelectEvent,
+  onClearSelection,
+  onReturnNow
+}: OperationalTimelineProps) {
+  const summary = getOperationalEventSummary(events);
+  const clusters = clusterOperationalEvents(events, mobile ? 60 : 10);
+  const selectedEvent = events.find((event) => event.id === selectedEventId) ?? null;
+  const cursorPosition = getDayPosition(cursorTime);
+  const height = mobile ? "100%" : mode === "expanded" ? 240 : mode === "summary" ? 52 : 72;
+
+  if (mode === "summary" && !mobile) {
+    return (
+      <section
+        aria-label="运行时间轴摘要"
+        className="acrylic-panel flex h-full items-center gap-3 rounded-2xl border px-3 text-slate-900"
+        style={{ height }}
+      >
+        <Clock3 size={15} className="text-blue-600" aria-hidden="true" />
+        <span className="text-xs font-semibold">{formatDate(date)}</span>
+        <span className="h-4 w-px bg-slate-300" />
+        <TimelineSummary summary={summary} />
+        {selectedEvent ? (
+          <button
+            type="button"
+            onClick={onClearSelection}
+            className="min-w-0 truncate text-left text-xs text-slate-600 hover:text-blue-700"
+          >
+            已选 {formatClock(selectedEvent.cursorTime)} · {selectedEvent.title}
+          </button>
+        ) : (
+          <span className="min-w-0 truncate text-xs text-slate-500">分析视图保持独立时间范围</span>
+        )}
+        <TimelineActions mode={mode} onModeChange={onModeChange} onReturnNow={onReturnNow} />
+      </section>
+    );
+  }
+
+  return (
+    <TooltipProvider delayDuration={180}>
+      <section
+        aria-label="运行时间轴"
+        className={cn(
+          "flex min-h-0 flex-col overflow-hidden text-slate-900",
+          mobile
+            ? "surface-reading h-full rounded-t-xl border-t"
+            : "acrylic-panel rounded-2xl border"
+        )}
+        style={{ height }}
+      >
+        <div
+          className={cn(
+            "flex shrink-0 items-center gap-3 border-b border-slate-300/70 px-3",
+            mode === "compact" && !mobile ? "h-8" : "h-12"
+          )}
+        >
+          <div className="flex min-w-0 items-center gap-2">
+            <Clock3 size={15} className="shrink-0 text-blue-600" aria-hidden="true" />
+            <div className="flex items-center gap-2">
+              <p className={cn("text-[10px] font-semibold uppercase tracking-[0.16em] text-slate-500", mode === "compact" && !mobile && "hidden")}>运行时间轴</p>
+              <p className="text-xs font-semibold text-slate-900">{formatDate(date)}</p>
+            </div>
+          </div>
+          <span className="hidden h-5 w-px bg-slate-300 sm:block" />
+          <TimelineSummary summary={summary} />
+          {selectedEvent && !mobile ? (
+            <button
+              type="button"
+              onClick={onClearSelection}
+              title="清除当前事件选择"
+              className="min-w-0 truncate text-left text-[11px] text-slate-500 hover:text-blue-700"
+            >
+              {formatClock(selectedEvent.cursorTime)} · {selectedEvent.title}
+            </button>
+          ) : null}
+          <TimelineActions mode={mode} onModeChange={onModeChange} onReturnNow={onReturnNow} />
+        </div>
+
+        {mode === "expanded" || mobile ? (
+          <div className="grid min-h-0 flex-1 grid-cols-[52px_minmax(0,1fr)] px-3 pb-2 pt-1.5 sm:grid-cols-[76px_minmax(0,1fr)]">
+            <div className="grid grid-rows-[18px_repeat(3,1fr)] pr-2 text-[10px] text-slate-500">
+              <span />
+              {LANES.map((lane) => (
+                <span key={lane.id} className="flex items-center font-semibold">{lane.label}</span>
+              ))}
+            </div>
+            <div className="surface-reading relative grid min-h-[142px] grid-rows-[18px_repeat(3,1fr)] rounded-xl border px-2">
+              <TimeTicks />
+              {LANES.map((lane) => (
+                <TimelineLane
+                  key={lane.id}
+                  lane={lane.id}
+                  clusters={clusters.filter((cluster) => cluster.lane === lane.id)}
+                  selectedEventId={selectedEventId}
+                  onSelectEvent={onSelectEvent}
+                />
+              ))}
+              <div
+                className="pointer-events-none absolute bottom-0 top-[18px] z-10 w-px bg-blue-500 shadow-[0_0_10px_rgba(59,130,246,0.45)]"
+                style={{ left: `${cursorPosition}%` }}
+              >
+                <span className="absolute -left-1 -top-1 h-2 w-2 rotate-45 bg-blue-500" />
+              </div>
+            </div>
+          </div>
+        ) : (
+          <div className="relative min-h-0 flex-1 px-3">
+            <CompactTimeTicks />
+            <div className="absolute bottom-1 left-3 right-3 top-3.5">
+              <div className="absolute inset-x-0 top-1/2 h-px bg-slate-300" />
+              {clusters.map((cluster, index) => (
+                <TimelineMarker
+                  key={cluster.id}
+                  cluster={cluster}
+                  compact
+                  markerIndex={index}
+                  selectedEventId={selectedEventId}
+                  onSelectEvent={onSelectEvent}
+                />
+              ))}
+              <div
+                className="pointer-events-none absolute bottom-0 top-0 z-10 w-px bg-blue-500"
+                style={{ left: `${cursorPosition}%` }}
+              />
+            </div>
+          </div>
+        )}
+      </section>
+    </TooltipProvider>
+  );
+}
+
+function TimelineLane({
+  lane,
+  clusters,
+  selectedEventId,
+  onSelectEvent
+}: {
+  lane: OperationalEventLane;
+  clusters: OperationalEventCluster[];
+  selectedEventId: string | null;
+  onSelectEvent: (event: OperationalEvent) => void;
+}) {
+  return (
+    <div className="relative border-t border-slate-200" data-lane={lane}>
+      {clusters.map((cluster, index) => (
+        <TimelineMarker
+          key={cluster.id}
+          cluster={cluster}
+          markerIndex={index}
+          selectedEventId={selectedEventId}
+          onSelectEvent={onSelectEvent}
+        />
+      ))}
+    </div>
+  );
+}
+
+function TimelineMarker({
+  cluster,
+  compact = false,
+  markerIndex,
+  selectedEventId,
+  onSelectEvent
+}: {
+  cluster: OperationalEventCluster;
+  compact?: boolean;
+  markerIndex: number;
+  selectedEventId: string | null;
+  onSelectEvent: (event: OperationalEvent) => void;
+}) {
+  const event = pickClusterEvent(cluster.events);
+  const selected = cluster.events.some((item) => item.id === selectedEventId);
+  const position = getDayPosition(event.cursorTime);
+  const exception = event.lane === "exception";
+  const verticalPosition = compact ? 56 : [24, 50, 76][markerIndex % 3];
+
+  return (
+    <Tooltip>
+      <TooltipTrigger asChild>
+        <button
+          type="button"
+          aria-label={`${formatClock(event.cursorTime)} ${event.title}`}
+          onClick={() => onSelectEvent(event)}
+          className={cn(
+            "absolute z-20 grid -translate-x-1/2 -translate-y-1/2 place-items-center outline-hidden transition-[transform,box-shadow] hover:scale-125 focus-visible:ring-2 focus-visible:ring-blue-600",
+            compact ? "h-2 w-2" : "h-5 w-5",
+            event.lane === "plan" &&
+              "rounded-md border border-blue-400 bg-blue-50 text-blue-700 shadow-[0_2px_7px_rgba(37,99,235,0.28)]",
+            event.lane === "actual" &&
+              "rounded-full border border-emerald-300 bg-emerald-500 text-white shadow-[0_2px_8px_rgba(16,185,129,0.34)]",
+            exception && event.status !== "failed" &&
+              "rounded-[7px] border border-amber-300 bg-amber-100 text-amber-800 shadow-[0_2px_9px_rgba(245,158,11,0.38)]",
+            event.status === "failed" &&
+              "rounded-[7px] border border-rose-300 bg-rose-500 text-white shadow-[0_2px_10px_rgba(244,63,94,0.42)]",
+            event.importance === "critical" && !compact && "h-6 w-6",
+            selected && "ring-2 ring-blue-600 ring-offset-2 ring-offset-white"
+          )}
+          style={{ left: `${position}%`, top: `${verticalPosition}%` }}
+        >
+          {!compact ? <OperationalEventGlyph event={event} /> : null}
+          {cluster.events.length > 1 && !compact ? (
+            <span className="absolute -right-2 -top-2 min-w-3.5 rounded-full bg-white px-1 text-[8px] font-bold text-slate-950">
+              {cluster.events.length}
+            </span>
+          ) : null}
+        </button>
+      </TooltipTrigger>
+      <TooltipContent side="top" className="max-w-72 bg-white px-3 py-2 text-slate-900 shadow-xl">
+        <div className="flex items-center gap-2">
+          <span className={cn(
+            "rounded-md px-1.5 py-0.5 text-[10px] font-semibold",
+            event.lane === "plan" && "bg-blue-50 text-blue-700",
+            event.lane === "actual" && "bg-emerald-50 text-emerald-700",
+            event.lane === "exception" && event.status !== "failed" && "bg-amber-50 text-amber-800",
+            event.status === "failed" && "bg-rose-50 text-rose-700"
+          )}>
+            {operationalEventNatureLabel(event)}
+          </span>
+          <span className="text-[10px] text-slate-500">{event.sourceLabel}</span>
+        </div>
+        <p className="mt-1.5 font-semibold">{formatClock(event.cursorTime)} · {event.title}</p>
+        <p className="mt-1 leading-5 text-slate-600">{event.description}</p>
+        {cluster.events.length > 1 ? <p className="mt-1 text-slate-500">同一时间窗共 {cluster.events.length} 项</p> : null}
+        {event.conditionId ? <p className="mt-1 font-medium text-blue-700">点击查看对应工况报告</p> : null}
+      </TooltipContent>
+    </Tooltip>
+  );
+}
+
+function OperationalEventGlyph({ event }: { event: OperationalEvent }) {
+  if (event.status === "failed") {
+    return <OctagonAlert size={12} strokeWidth={2.4} aria-hidden="true" />;
+  }
+  if (event.lane === "exception") {
+    return <TriangleAlert size={12} strokeWidth={2.4} aria-hidden="true" />;
+  }
+  if (event.lane === "actual") {
+    return <Check size={12} strokeWidth={2.8} aria-hidden="true" />;
+  }
+  return <CalendarClock size={11} strokeWidth={2.2} aria-hidden="true" />;
+}
+
+function operationalEventNatureLabel(event: OperationalEvent) {
+  if (event.status === "failed") return "关键异常";
+  if (event.lane === "exception") return "运行偏差";
+  if (event.lane === "actual") return "实际执行";
+  return "计划任务";
+}
+
+function TimelineSummary({ summary }: { summary: ReturnType<typeof getOperationalEventSummary> }) {
+  return (
+    <div className="flex shrink-0 items-center gap-2 text-[10px] text-slate-500 sm:gap-3">
+      <span>计划 <strong className="text-blue-700">{summary.planned}</strong></span>
+      <span>执行 <strong className="text-emerald-700">{summary.active}</strong></span>
+      <span>异常 <strong className="text-amber-700">{summary.exceptions}</strong></span>
+    </div>
+  );
+}
+
+function TimelineActions({
+  mode,
+  onModeChange,
+  onReturnNow
+}: {
+  mode: OperationalTimelineMode;
+  onModeChange?: (mode: OperationalTimelineMode) => void;
+  onReturnNow: () => void;
+}) {
+  return (
+    <div className="ml-auto flex shrink-0 items-center gap-1">
+      <button
+        type="button"
+        title="返回现在"
+        aria-label="返回现在"
+        onClick={onReturnNow}
+        className="surface-control grid h-8 w-8 place-items-center rounded-lg border text-slate-500 hover:text-blue-700"
+      >
+        <RotateCcw size={14} aria-hidden="true" />
+      </button>
+      {onModeChange ? (
+        <button
+          type="button"
+          title={mode === "expanded" ? "收起时间轴" : "展开时间轴"}
+          aria-label={mode === "expanded" ? "收起时间轴" : "展开时间轴"}
+          onClick={() => onModeChange(mode === "expanded" ? "compact" : "expanded")}
+          className="surface-control grid h-8 w-8 place-items-center rounded-lg border text-slate-500 hover:text-blue-700"
+        >
+          {mode === "expanded" ? <ChevronDown size={15} /> : <ChevronUp size={15} />}
+        </button>
+      ) : null}
+    </div>
+  );
+}
+
+function TimeTicks() {
+  return (
+    <div className="relative text-[9px] text-slate-600">
+      {[0, 6, 12, 18, 24].map((hour) => (
+        <span
+          key={hour}
+          className={cn(
+            "absolute",
+            hour === 0 ? "translate-x-0" : hour === 24 ? "-translate-x-full" : "-translate-x-1/2"
+          )}
+          style={{ left: `${(hour / 24) * 100}%` }}
+        >
+          {String(hour).padStart(2, "0")}:00
+        </span>
+      ))}
+    </div>
+  );
+}
+
+function CompactTimeTicks() {
+  return (
+    <div className="absolute inset-x-3 top-0 text-[8px] text-slate-500">
+      {[0, 6, 12, 18, 24].map((hour) => (
+        <span
+          key={hour}
+          className={cn(
+            "absolute",
+            hour === 0 ? "translate-x-0" : hour === 24 ? "-translate-x-full" : "-translate-x-1/2"
+          )}
+          style={{ left: `${(hour / 24) * 100}%` }}
+        >
+          {String(hour).padStart(2, "0")}:00
+        </span>
+      ))}
+    </div>
+  );
+}
+
+function pickClusterEvent(events: OperationalEvent[]) {
+  return [...events].sort((left, right) => importanceRank(right.importance) - importanceRank(left.importance))[0];
+}
+
+function importanceRank(value: OperationalEvent["importance"]) {
+  return value === "critical" ? 2 : value === "important" ? 1 : 0;
+}
+
+function getDayPosition(value: string) {
+  const date = new Date(value);
+  const minutes = date.getHours() * 60 + date.getMinutes() + date.getSeconds() / 60;
+  return Math.min(100, Math.max(0, (minutes / (24 * 60)) * 100));
+}
+
+function formatClock(value: string) {
+  return new Intl.DateTimeFormat("zh-CN", { hour: "2-digit", minute: "2-digit", hour12: false }).format(new Date(value));
+}
+
+function formatDate(value: string) {
+  const [year, month, day] = value.split("-");
+  return `${year}.${month}.${day}`;
+}
diff --git a/src/features/workbench/workspace/analysis-document-fixtures.ts b/src/features/workbench/workspace/analysis-document-fixtures.ts
index 56137ae..96b5f15 100644
--- a/src/features/workbench/workspace/analysis-document-fixtures.ts
+++ b/src/features/workbench/workspace/analysis-document-fixtures.ts
@@ -13,6 +13,10 @@ const PRESSURE_DIAGNOSIS: FixtureFactory = (id, generatedAt) => ({
   scope: "北辰供水分区 · 最近 6 小时",
   confidence: "92.6%",
   generatedAt,
+  analyticalTimeRange: {
+    start: new Date(resolveFixtureTimestamp(generatedAt) - 6 * 60 * 60 * 1000).toISOString(),
+    end: new Date(resolveFixtureTimestamp(generatedAt)).toISOString()
+  },
   preferredView: "map_split",
   mapRelation: "required",
   blocks: [
@@ -93,6 +97,10 @@ const SUPPLY_ZONE_ANALYSIS: FixtureFactory = (id, generatedAt) => ({
   scope: "六个服务分区 · 今日峰值预测",
   confidence: "88.4%",
   generatedAt,
+  analyticalTimeRange: {
+    start: new Date(new Date(resolveFixtureTimestamp(generatedAt)).setHours(0, 0, 0, 0)).toISOString(),
+    end: new Date(new Date(resolveFixtureTimestamp(generatedAt)).setHours(23, 59, 59, 999)).toISOString()
+  },
   preferredView: "focus",
   mapRelation: "none",
   blocks: [
@@ -171,6 +179,10 @@ const DISPATCH_FLOW: FixtureFactory = (id, generatedAt) => ({
   scope: "北辰低压事件 · 30 分钟模拟",
   confidence: "90.8%",
   generatedAt,
+  analyticalTimeRange: {
+    start: new Date(resolveFixtureTimestamp(generatedAt) - 30 * 60 * 1000).toISOString(),
+    end: new Date(resolveFixtureTimestamp(generatedAt)).toISOString()
+  },
   preferredView: "map_split",
   mapRelation: "required",
   blocks: [
@@ -251,3 +263,10 @@ export function createAnalysisArtifactFixture(index: number, instance: number):
     now.toLocaleTimeString("zh-CN", { hour12: false })
   );
 }
+
+function resolveFixtureTimestamp(clock: string) {
+  const [hours = 0, minutes = 0, seconds = 0] = clock.split(":").map(Number);
+  const value = new Date();
+  value.setHours(hours, minutes, seconds, 0);
+  return value.getTime();
+}
diff --git a/src/features/workbench/workspace/analysis-document-view.tsx b/src/features/workbench/workspace/analysis-document-view.tsx
index 8905757..104f053 100644
--- a/src/features/workbench/workspace/analysis-document-view.tsx
+++ b/src/features/workbench/workspace/analysis-document-view.tsx
@@ -70,7 +70,7 @@ export function AnalysisArtifactWorkspace({
   return (
     <article
       aria-label={`${artifact.title}分析成果`}
-      className="relative grid h-full min-h-0 grid-rows-[auto_minmax(0,1fr)_auto] overflow-hidden bg-[#eef2f6] text-slate-900"
+      className="acrylic-panel relative m-3 grid h-[calc(100%-1.5rem)] min-h-0 grid-rows-[auto_minmax(0,1fr)_auto] overflow-hidden rounded-2xl border text-slate-900"
       lang="zh-CN"
     >
       <ArtifactHeader artifact={artifact} />
@@ -138,7 +138,7 @@ export function AnalysisArtifactWorkspace({
 
 function ArtifactHeader({ artifact }: { artifact: AnalysisArtifact }) {
   return (
-    <header className="relative z-10 bg-white px-4 py-4 shadow-[0_1px_0_rgba(15,23,42,0.08),0_5px_18px_rgba(15,23,42,0.04)] xl:px-5">
+    <header className="surface-control relative z-10 border-b px-4 py-4 xl:px-5">
       <div className="flex items-start justify-between gap-5">
         <div className="min-w-0">
           <div className="flex flex-wrap items-center gap-2 text-xs font-medium text-slate-500">
@@ -190,7 +190,7 @@ function AnalysisBlockView({
     <section
       aria-labelledby={`${block.id}-title`}
       className={cn(
-        "group min-w-0 overflow-hidden bg-white shadow-[0_1px_4px_rgba(15,23,42,0.12)]",
+        "surface-reading group min-w-0 overflow-hidden rounded-xl border shadow-[0_1px_4px_rgba(15,23,42,0.08)]",
         "focus-within:shadow-[0_0_0_2px_rgba(37,99,235,0.35),0_8px_24px_rgba(15,23,42,0.12)]",
         spanClass,
         selected && "shadow-[0_0_0_2px_rgba(37,99,235,0.28),0_8px_24px_rgba(15,23,42,0.12)]"
@@ -281,11 +281,11 @@ function AnalysisBlockBody({ block }: { block: Exclude<AnalysisBlock, { kind: "m
 function ArtifactProvenance({ artifact }: { artifact: AnalysisArtifact }) {
   return (
     <section className="mt-5 grid gap-3 pb-2 xl:grid-cols-2" aria-label="成果依据与限制">
-      <div className="bg-[#e7edf3] px-4 py-3.5">
+      <div className="surface-well rounded-xl border px-4 py-3.5">
         <h3 className="flex items-center gap-2 text-xs font-semibold text-slate-800"><Database size={14} aria-hidden="true" />数据来源</h3>
         <ul className="mt-2 flex flex-wrap gap-2">{artifact.sources.map((source) => <li key={source} className="rounded-md bg-white px-2.5 py-1 text-xs text-slate-600 shadow-[0_1px_2px_rgba(15,23,42,0.08)]">{source}</li>)}</ul>
       </div>
-      <div className="bg-amber-50 px-4 py-3.5">
+      <div className="material-tone-warning rounded-xl border px-4 py-3.5">
         <h3 className="flex items-center gap-2 text-xs font-semibold text-amber-900"><AlertTriangle size={14} aria-hidden="true" />分析限制</h3>
         <ul className="mt-2 space-y-1 text-xs leading-5 text-amber-900/75">{artifact.limitations.map((item) => <li key={item}>• {item}</li>)}</ul>
       </div>
@@ -303,7 +303,7 @@ function ArtifactDetailDrawer({
   onClose: () => void;
 }) {
   return (
-    <aside aria-label="证据详情" className="absolute bottom-[57px] right-0 top-0 z-30 w-full max-w-[420px] overflow-y-auto overscroll-contain bg-white shadow-[-12px_0_36px_rgba(15,23,42,0.18)]">
+    <aside aria-label="证据详情" className="surface-reading absolute bottom-[57px] right-0 top-0 z-30 w-full max-w-[420px] overflow-y-auto overscroll-contain border-l shadow-[-12px_0_36px_rgba(15,23,42,0.18)]">
       <div className="sticky top-0 z-10 flex items-center justify-between bg-slate-950 px-4 py-3 text-slate-100">
         <div>
           <p className="text-[11px] font-semibold uppercase tracking-[0.14em] text-blue-300">Evidence detail</p>
@@ -355,7 +355,7 @@ function ArtifactActionBar({
   onDestroy: () => void;
 }) {
   return (
-    <footer className="relative z-20 flex min-h-14 items-center justify-between gap-3 bg-white px-3 shadow-[0_-1px_0_rgba(15,23,42,0.08),0_-6px_18px_rgba(15,23,42,0.04)]">
+    <footer className="surface-control relative z-20 mb-[calc(var(--workbench-timeline-height)+0.25rem)] flex min-h-14 items-center justify-between gap-3 border-t px-3">
       <div className="flex min-w-0 items-center gap-1">
         {artifact.mapRelation !== "none" ? (
           <button type="button" onClick={() => onSetView(surfaceMode === "map_split" ? "focus" : mapSplitAvailable ? "map_split" : "map_only")} className="inline-flex h-10 items-center gap-2 rounded-md px-3 text-xs font-semibold text-slate-700 hover:bg-slate-100 active:scale-95">
@@ -392,7 +392,7 @@ function ArtifactPrimaryAction({ action, artifact }: { action: AnalysisArtifactA
 
 function MetricTile({ metric }: { metric: AnalysisMetric }) {
   return (
-    <div className="min-w-0 bg-white px-3.5 py-3 shadow-[0_1px_4px_rgba(15,23,42,0.12)]">
+    <div className="surface-reading min-w-0 rounded-xl border px-3.5 py-3 shadow-[0_1px_4px_rgba(15,23,42,0.08)]">
       <div className="flex items-center gap-2">
         <span className={cn("h-2 w-2 rounded-full", metricToneClass(metric.tone))} aria-hidden="true" />
         <p className="truncate text-xs font-medium text-slate-500">{metric.label}</p>
diff --git a/src/features/workbench/workspace/artifact-peek-bar.tsx b/src/features/workbench/workspace/artifact-peek-bar.tsx
index 6780292..6b3d745 100644
--- a/src/features/workbench/workspace/artifact-peek-bar.tsx
+++ b/src/features/workbench/workspace/artifact-peek-bar.tsx
@@ -17,21 +17,21 @@ export function ArtifactPeekBar({
     <aside
       aria-label="Agent 成果预览"
       className={cn(
-        "pointer-events-auto absolute bottom-4 z-30 flex min-h-[76px] w-[min(680px,calc(100%-2rem))] items-center gap-3 bg-slate-950 px-3 py-2.5 text-slate-100 shadow-[0_18px_44px_rgba(15,23,42,0.28)]",
-        "bottom-16 left-1/2 -translate-x-1/2",
+        "acrylic-panel pointer-events-auto absolute bottom-[calc(var(--workbench-timeline-height)+1rem)] z-30 flex min-h-[76px] w-[min(680px,calc(100%-2rem))] items-center gap-3 rounded-2xl border px-3 py-2.5 text-slate-900",
+        "left-1/2 -translate-x-1/2",
         surfaceMode === "map_split" && "2xl:left-[25%]"
       )}
     >
-      <span className="hidden h-11 w-11 shrink-0 place-items-center rounded-lg bg-blue-500/15 text-blue-300 sm:grid">
+      <span className="material-tone-agent hidden h-11 w-11 shrink-0 place-items-center rounded-xl border text-violet-700 sm:grid">
         <FileChartColumnIncreasing size={21} aria-hidden="true" />
       </span>
       <div className="min-w-0 flex-1">
-        <div className="flex items-center gap-2 text-[11px] font-semibold text-blue-300">
+        <div className="flex items-center gap-2 text-[11px] font-semibold text-violet-700">
           <Sparkles size={12} aria-hidden="true" />
           新分析成果 · R{artifact.revision}
         </div>
-        <p className="mt-1 truncate text-sm font-semibold text-slate-50">{artifact.title}</p>
-        <p className="mt-0.5 line-clamp-1 text-xs text-slate-400">{artifact.summary}</p>
+        <p className="mt-1 truncate text-sm font-semibold text-slate-950">{artifact.title}</p>
+        <p className="mt-0.5 line-clamp-1 text-xs text-slate-600">{artifact.summary}</p>
       </div>
       <button
         type="button"
@@ -46,7 +46,7 @@ export function ArtifactPeekBar({
         aria-label="销毁预览成果"
         title="销毁预览成果"
         onClick={onDestroy}
-        className="grid h-10 w-10 shrink-0 place-items-center rounded-md text-slate-400 hover:bg-white/10 hover:text-rose-300 active:scale-95"
+        className="surface-control grid h-10 w-10 shrink-0 place-items-center rounded-xl border text-slate-500 hover:text-rose-700 active:scale-95"
       >
         <Trash2 size={16} aria-hidden="true" />
       </button>
diff --git a/src/features/workbench/workspace/use-artifact-workspace.ts b/src/features/workbench/workspace/use-artifact-workspace.ts
index 2ad2098..78d50ab 100644
--- a/src/features/workbench/workspace/use-artifact-workspace.ts
+++ b/src/features/workbench/workspace/use-artifact-workspace.ts
@@ -13,7 +13,7 @@ import {
   type ArtifactRequestedView
 } from "./workspace-model";
 
-export function useArtifactWorkspace(viewportWidth: number) {
+export function useArtifactWorkspace(businessWorkspaceWidth: number) {
   const [state, setState] = useState(createInitialArtifactWorkspaceState);
   const fixtureIndexRef = useRef(0);
   const fixtureInstanceRef = useRef(0);
@@ -49,14 +49,14 @@ export function useArtifactWorkspace(viewportWidth: number) {
   }, []);
 
   const surfaceMode = useMemo(
-    () => resolveWorkbenchSurfaceMode(state, viewportWidth),
-    [state, viewportWidth]
+    () => resolveWorkbenchSurfaceMode(state, businessWorkspaceWidth),
+    [businessWorkspaceWidth, state]
   );
 
   return {
     ...state,
     surfaceMode,
-    mapSplitAvailable: viewportWidth >= ARTIFACT_MAP_SPLIT_MIN_WIDTH,
+    mapSplitAvailable: businessWorkspaceWidth >= ARTIFACT_MAP_SPLIT_MIN_WIDTH,
     createTestArtifactPreview,
     openPreview,
     collapseArtifact,
diff --git a/src/features/workbench/workspace/workbench-main-frame.tsx b/src/features/workbench/workspace/workbench-main-frame.tsx
index f69dd84..f2fb886 100644
--- a/src/features/workbench/workspace/workbench-main-frame.tsx
+++ b/src/features/workbench/workspace/workbench-main-frame.tsx
@@ -12,6 +12,8 @@ import type {
 type WorkbenchMainFrameProps = {
   mapContent: ReactNode;
   mapOverlay?: ReactNode;
+  timelineContent: ReactNode;
+  timelineMode: "compact" | "expanded" | "summary";
   activeArtifact: AnalysisArtifact | null;
   pendingArtifact: AnalysisArtifact | null;
   surfaceMode: WorkbenchSurfaceMode;
@@ -26,6 +28,8 @@ type WorkbenchMainFrameProps = {
 export function WorkbenchMainFrame({
   mapContent,
   mapOverlay,
+  timelineContent,
+  timelineMode,
   activeArtifact,
   pendingArtifact,
   surfaceMode,
@@ -41,8 +45,9 @@ export function WorkbenchMainFrame({
 
   return (
     <div
-      className="workbench-main-frame pointer-events-none absolute inset-x-0 bottom-0 top-14 lg:left-[var(--workbench-agent-current-width)]"
+      className="workbench-main-frame pointer-events-none absolute inset-x-0 bottom-0 top-14 min-h-0 lg:left-[var(--workbench-agent-current-width)]"
       data-testid="workbench-main-frame"
+      data-timeline-mode={timelineMode}
     >
       <div
         id="main-workspace"
@@ -94,16 +99,27 @@ export function WorkbenchMainFrame({
             />
           </section>
         ) : null}
+
+        {pendingArtifact ? (
+          <ArtifactPeekBar
+            artifact={pendingArtifact}
+            surfaceMode={surfaceMode}
+            onOpen={onOpenPendingArtifact}
+            onDestroy={onDestroyPendingArtifact}
+          />
+        ) : null}
       </div>
 
-      {pendingArtifact ? (
-        <ArtifactPeekBar
-          artifact={pendingArtifact}
-          surfaceMode={surfaceMode}
-          onOpen={onOpenPendingArtifact}
-          onDestroy={onDestroyPendingArtifact}
-        />
-      ) : null}
+      <div
+        className={cn(
+          "pointer-events-auto absolute bottom-3 left-3 right-3 z-40 mx-auto min-h-0 w-[calc(100%-1.5rem)]",
+          timelineMode === "expanded" && "max-w-[1180px]",
+          timelineMode === "compact" && "max-w-[980px]",
+          timelineMode === "summary" && "max-w-[760px]"
+        )}
+      >
+        {timelineContent}
+      </div>
     </div>
   );
 }
diff --git a/src/features/workbench/workspace/workspace-context.test.ts b/src/features/workbench/workspace/workspace-context.test.ts
new file mode 100644
index 0000000..595939b
--- /dev/null
+++ b/src/features/workbench/workspace/workspace-context.test.ts
@@ -0,0 +1,46 @@
+import { describe, expect, it } from "vitest";
+import { createAnalysisArtifactFixture } from "./analysis-document-fixtures";
+import { createInitialWorkspaceContext, reduceWorkspaceContext } from "./workspace-context";
+
+describe("workspace context", () => {
+  it("keeps operational time independent from artifact analytical time", () => {
+    const artifact = createAnalysisArtifactFixture(0, 0);
+    const withArtifact = reduceWorkspaceContext(createInitialWorkspaceContext(), {
+      type: "sync-artifact",
+      artifact
+    });
+    const selectedEvent = reduceWorkspaceContext(withArtifact, {
+      type: "select-operational-event",
+      eventId: "event-1",
+      cursorTime: "2026-08-19T10:30:00.000Z"
+    });
+
+    expect(selectedEvent.analytical.timeRange).toEqual(artifact.analyticalTimeRange);
+    expect(selectedEvent.operational.cursorTime).toBe("2026-08-19T10:30:00.000Z");
+  });
+
+  it("updates analytical context without moving the operational cursor", () => {
+    const initial = createInitialWorkspaceContext(new Date("2026-08-19T08:00:00.000Z"));
+    const cursorTime = initial.operational.cursorTime;
+    const withArtifact = reduceWorkspaceContext(initial, {
+      type: "sync-artifact",
+      artifact: createAnalysisArtifactFixture(1, 1)
+    });
+
+    expect(withArtifact.operational.cursorTime).toBe(cursorTime);
+    expect(withArtifact.analytical.artifactId).toBeTruthy();
+  });
+
+  it("clears selection while retaining cursor until returning to now", () => {
+    const initial = createInitialWorkspaceContext();
+    const selected = reduceWorkspaceContext(initial, {
+      type: "select-operational-event",
+      eventId: "event-2",
+      cursorTime: "2026-08-19T13:10:00.000Z"
+    });
+    const cleared = reduceWorkspaceContext(selected, { type: "clear-operational-event" });
+
+    expect(cleared.operational.selectedEventId).toBeNull();
+    expect(cleared.operational.cursorTime).toBe("2026-08-19T13:10:00.000Z");
+  });
+});
diff --git a/src/features/workbench/workspace/workspace-context.ts b/src/features/workbench/workspace/workspace-context.ts
new file mode 100644
index 0000000..6a50b28
--- /dev/null
+++ b/src/features/workbench/workspace/workspace-context.ts
@@ -0,0 +1,102 @@
+import type { AnalysisArtifact } from "./workspace-model";
+
+export type WorkspaceTimeRange = { start: string; end: string };
+
+export type WorkspaceContext = {
+  spatial: {
+    featureId: string | null;
+    sourceId: string | null;
+  };
+  operational: {
+    date: string;
+    cursorTime: string;
+    selectedEventId: string | null;
+  };
+  analytical: {
+    artifactId: string | null;
+    timeRange: WorkspaceTimeRange | null;
+    evidenceId: string | null;
+  };
+};
+
+export type WorkspaceContextAction =
+  | { type: "select-operational-event"; eventId: string; cursorTime: string }
+  | { type: "clear-operational-event" }
+  | { type: "return-operational-now"; now: string }
+  | { type: "select-spatial-feature"; featureId: string; sourceId: string }
+  | { type: "clear-spatial-feature" }
+  | { type: "sync-artifact"; artifact: AnalysisArtifact | null }
+  | { type: "select-evidence"; evidenceId: string | null };
+
+export function createInitialWorkspaceContext(now = new Date()): WorkspaceContext {
+  return {
+    spatial: { featureId: null, sourceId: null },
+    operational: {
+      date: toLocalDateKey(now),
+      cursorTime: now.toISOString(),
+      selectedEventId: null
+    },
+    analytical: { artifactId: null, timeRange: null, evidenceId: null }
+  };
+}
+
+export function reduceWorkspaceContext(
+  state: WorkspaceContext,
+  action: WorkspaceContextAction
+): WorkspaceContext {
+  switch (action.type) {
+    case "select-operational-event":
+      return {
+        ...state,
+        operational: {
+          ...state.operational,
+          cursorTime: action.cursorTime,
+          selectedEventId: action.eventId
+        }
+      };
+    case "clear-operational-event":
+      return {
+        ...state,
+        operational: { ...state.operational, selectedEventId: null }
+      };
+    case "return-operational-now":
+      return {
+        ...state,
+        operational: {
+          date: toLocalDateKey(new Date(action.now)),
+          cursorTime: action.now,
+          selectedEventId: null
+        }
+      };
+    case "select-spatial-feature":
+      return {
+        ...state,
+        spatial: { featureId: action.featureId, sourceId: action.sourceId }
+      };
+    case "clear-spatial-feature":
+      return { ...state, spatial: { featureId: null, sourceId: null } };
+    case "sync-artifact":
+      return {
+        ...state,
+        analytical: action.artifact
+          ? {
+              artifactId: action.artifact.id,
+              timeRange: action.artifact.analyticalTimeRange,
+              evidenceId: null
+            }
+          : { artifactId: null, timeRange: null, evidenceId: null }
+      };
+    case "select-evidence":
+      return {
+        ...state,
+        analytical: { ...state.analytical, evidenceId: action.evidenceId }
+      };
+  }
+}
+
+function toLocalDateKey(value: Date) {
+  const year = value.getFullYear();
+  const month = String(value.getMonth() + 1).padStart(2, "0");
+  const day = String(value.getDate()).padStart(2, "0");
+  return `${year}-${month}-${day}`;
+}
diff --git a/src/features/workbench/workspace/workspace-model.ts b/src/features/workbench/workspace/workspace-model.ts
index 4146349..7586584 100644
--- a/src/features/workbench/workspace/workspace-model.ts
+++ b/src/features/workbench/workspace/workspace-model.ts
@@ -1,4 +1,5 @@
-export const ARTIFACT_MAP_SPLIT_MIN_WIDTH = 1360;
+export const ARTIFACT_PANE_MIN_WIDTH = 640;
+export const ARTIFACT_MAP_SPLIT_MIN_WIDTH = ARTIFACT_PANE_MIN_WIDTH * 2 + 1;
 
 export type ArtifactType = "diagnosis" | "simulation" | "metric_analysis";
 export type ArtifactLifecycle = "draft" | "reviewed" | "published" | "archived";
@@ -88,6 +89,7 @@ export type AnalysisArtifact = {
   scope: string;
   confidence: string;
   generatedAt: string;
+  analyticalTimeRange: { start: string; end: string };
   preferredView: ArtifactViewMode;
   mapRelation: ArtifactMapRelation;
   blocks: AnalysisBlock[];
@@ -155,13 +157,13 @@ export function requestArtifactView(
 
 export function resolveWorkbenchSurfaceMode(
   state: ArtifactWorkspaceState,
-  viewportWidth: number
+  businessWorkspaceWidth: number
 ): WorkbenchSurfaceMode {
   const artifact = state.activeArtifact;
   if (!artifact) return "default";
   if (state.requestedView === "map_only") return "map_only";
   if (artifact.mapRelation === "none" || state.requestedView === "focus") return "focus";
-  return viewportWidth >= ARTIFACT_MAP_SPLIT_MIN_WIDTH ? "map_split" : "focus";
+  return businessWorkspaceWidth >= ARTIFACT_MAP_SPLIT_MIN_WIDTH ? "map_split" : "focus";
 }
 
 function getPreferredArtifactView(artifact: AnalysisArtifact): ArtifactViewMode {