diff --git a/.memory/worklog.json b/.memory/worklog.json
index f7df35a..8025b90 100644
--- a/.memory/worklog.json
+++ b/.memory/worklog.json
@@ -2268,6 +2268,13 @@
       "type": "session-heartbeat",
       "message": "Codex 会话活跃 · 最近命令：codex · 6 项未提交变更 · 最近提交：auto-save 2026-05-13 19:56 (~4)",
       "files_changed": 6
+    },
+    {
+      "ts": "2026-05-13T20:01:52+08:00",
+      "type": "commit",
+      "message": "auto-save 2026-05-13 20:01 (~6)",
+      "hash": "3f9075f",
+      "files_changed": 6
     }
   ]
 }
diff --git a/docs/source-analysis.html b/docs/source-analysis.html
index a1107e8..7c9b347 100644
--- a/docs/source-analysis.html
+++ b/docs/source-analysis.html
@@ -500,7 +500,7 @@
         <div class="grid-3">
           <div class="card">
             <h3>1. 先说你在改哪个产品区</h3>
-            <p>例如“镜头拆解 / 元素提取面板”、“元素改造 Storyboard 节点”、“分镜头编排工作台 4 图槽”。不要只说“这里乱”，要指向页面里的功能区。</p>
+            <p>例如“镜头拆解 / 元素提取面板”、“元素改造 Storyboard 节点”、“分镜头编排下拉区 4 图槽”。不要只说“这里乱”，要指向页面里的功能区。</p>
           </div>
           <div class="card">
             <h3>2. 再说这个区应该承担什么职责</h3>
@@ -572,8 +572,8 @@
                 <tr><td><code>web/app/page.tsx</code></td><td>产品工作台主状态：jobs、activeJobId、selectedFrames、clipboard、ReactFlow 节点和边。</td></tr>
                 <tr><td><code>web/components/nodes/index.tsx</code></td><td>DAG 节点定义：Input、Keyframe、ASR、Translate、Rewrite、Storyboard、VideoGen、Compose。</td></tr>
                 <tr><td><code>web/components/lightbox.tsx</code></td><td>镜头拆解和元素提取的主工作面板：清洗、识别、元素编辑、区域提取、抠图。</td></tr>
-                <tr><td><code>web/components/storyboard-bar.tsx</code></td><td>顶部已选分镜条：展示选入编排的关键帧，点击进入工作台。</td></tr>
-                <tr><td><code>web/components/storyboard-workbench.tsx</code></td><td>顶部分镜编排内嵌面板：4 图槽、改造目标、时长、自动保存。</td></tr>
+                <tr><td><code>web/components/storyboard-bar.tsx</code></td><td>顶部分镜编排条：展示选入编排的关键帧，并作为唯一分镜导航。</td></tr>
+                <tr><td><code>web/components/storyboard-workbench.tsx</code></td><td>顶部分镜编排条下方的明细区：4 图槽、改造目标、时长、自动保存。</td></tr>
                 <tr><td><code>web/lib/api.ts</code></td><td>前端类型和 API client，是前后端数据契约镜像。</td></tr>
               </tbody>
             </table>
@@ -830,6 +830,29 @@ api/main.py
         <h2>变更记录</h2>
         <p>这个记录不是 git log 的替代品。它记录“产品理解发生了什么变化、影响了哪些源码、你以后描述需求时该怎么说”。后续每次改功能都要补一条。</p>
         <div class="changelog">
+          <article class="change">
+            <header>
+              <h3>2026-05-13 · 分镜编排下拉区支持上推缩小</h3>
+              <span class="tag violet">StoryboardWorkbench</span>
+            </header>
+            <div class="body">
+              <p><strong>问题：</strong>分镜编排明细区默认占用太多顶部面积，展开后下方画布空间不足。</p>
+              <p><strong>改动：</strong>明细区默认高度降为 320px，并增加底部拖拽手柄，可上推缩到 180px，也可下拉放大查看完整内容。</p>
+              <p><strong>影响：</strong><code>web/components/storyboard-workbench.tsx</code>。</p>
+            </div>
+          </article>
+          <article class="change">
+            <header>
+              <h3>2026-05-13 · 分镜缩略图条与编排明细合并为一个下拉区</h3>
+              <span class="tag violet">StoryboardBar</span>
+              <span class="tag violet">StoryboardWorkbench</span>
+            </header>
+            <div class="body">
+              <p><strong>问题：</strong>顶部分镜缩略图条和下方内嵌工作台都带分镜导航，看起来像两个不同板块。</p>
+              <p><strong>改动：</strong><code>StoryboardBar</code> 成为唯一分镜导航；<code>StoryboardWorkbench</code> 移除自己的标题栏、左侧分镜列表和底部快捷栏，只保留当前分镜的 4 图槽与改造目标明细。</p>
+              <p><strong>影响：</strong><code>web/components/storyboard-bar.tsx</code>、<code>web/components/storyboard-workbench.tsx</code>、<code>web/app/page.tsx</code>。</p>
+            </div>
+          </article>
           <article class="change">
             <header>
               <h3>2026-05-13 · 分镜头编排工作台改为内嵌下拉</h3>
diff --git a/web/app/page.tsx b/web/app/page.tsx
index 78e2972..7bd7884 100644
--- a/web/app/page.tsx
+++ b/web/app/page.tsx
@@ -414,10 +414,12 @@ export default function Home() {
               selectedFrames={selectedFrames}
               focusedFrame={storyboardFrame}
               onFocusFrame={setStoryboardFrame}
+              workbenchOpen={workbenchOpen}
               onOpenWorkbench={(idx?: number) => {
                 if (typeof idx === "number") setStoryboardFrame(idx)
                 setWorkbenchOpen(true)
               }}
+              onCloseWorkbench={() => setWorkbenchOpen(false)}
             />
             <StoryboardWorkbench
               job={job}
diff --git a/web/components/storyboard-bar.tsx b/web/components/storyboard-bar.tsx
index 8fdc8fc..661eeb4 100644
--- a/web/components/storyboard-bar.tsx
+++ b/web/components/storyboard-bar.tsx
@@ -2,17 +2,19 @@
 import { useEffect, useRef, useState } from "react"
 import { createPortal } from "react-dom"
 import { LayoutGrid, ChevronDown, ChevronUp, Sparkle } from "lucide-react"
-import { type Job, type KeyFrame, effectiveFrameUrl, hasCutout } from "@/lib/api"
+import { type Job, effectiveFrameUrl, hasCutout } from "@/lib/api"
 
 interface Props {
   job: Job | null
   selectedFrames: Set<number>
   focusedFrame: number | null
   onFocusFrame: (idx: number | null) => void
+  workbenchOpen?: boolean
   onOpenWorkbench?: (frameIdx?: number) => void
+  onCloseWorkbench?: () => void
 }
 
-export function StoryboardBar({ job, selectedFrames, focusedFrame, onFocusFrame, onOpenWorkbench }: Props) {
+export function StoryboardBar({ job, selectedFrames, focusedFrame, onFocusFrame, workbenchOpen = false, onOpenWorkbench, onCloseWorkbench }: Props) {
   const [collapsed, setCollapsed] = useState(false)
   const [mounted, setMounted] = useState(false)
   useEffect(() => setMounted(true), [])
@@ -64,6 +66,10 @@ export function StoryboardBar({ job, selectedFrames, focusedFrame, onFocusFrame,
         <div className="flex items-center gap-2 shrink-0">
           <button
             onClick={() => {
+              if (workbenchOpen) {
+                onCloseWorkbench?.()
+                return
+              }
               if (frames.length === 0) return
               const nextFrame = focusedFrame ?? frames[0].index
               if (focusedFrame === null) onFocusFrame(nextFrame)
@@ -72,13 +78,17 @@ export function StoryboardBar({ job, selectedFrames, focusedFrame, onFocusFrame,
             }}
             disabled={frames.length === 0}
             className="text-[11px] px-2.5 py-1 rounded-md bg-gradient-to-r from-violet-500 to-pink-500 hover:from-violet-400 hover:to-pink-400 text-white inline-flex items-center gap-1 disabled:opacity-40 disabled:cursor-not-allowed font-medium shadow"
-            title={frames.length === 0 ? "先到关键帧节点选用分镜" : "下拉展开分镜头编排"}
+            title={frames.length === 0 ? "先到关键帧节点选用分镜" : workbenchOpen ? "收起分镜头编排明细" : "下拉展开分镜头编排"}
           >
-            <ChevronDown className="h-3 w-3" />
-            展开编排
+            {workbenchOpen ? <ChevronUp className="h-3 w-3" /> : <ChevronDown className="h-3 w-3" />}
+            {workbenchOpen ? "收起编排" : "展开编排"}
           </button>
           <button
-            onClick={() => setCollapsed(!collapsed)}
+            onClick={() => {
+              const nextCollapsed = !collapsed
+              setCollapsed(nextCollapsed)
+              if (nextCollapsed) onCloseWorkbench?.()
+            }}
             className="text-white/50 hover:text-white text-[11px] inline-flex items-center gap-1"
             title={collapsed ? "展开" : "折叠"}
           >
diff --git a/web/components/storyboard-workbench.tsx b/web/components/storyboard-workbench.tsx
index 12f4463..ce890fa 100644
--- a/web/components/storyboard-workbench.tsx
+++ b/web/components/storyboard-workbench.tsx
@@ -1,9 +1,9 @@
 "use client"
-import { useEffect, useState, useRef, type ReactNode } from "react"
-import { X, LayoutGrid, Loader2, Check, Wand2 } from "lucide-react"
+import { useEffect, useState, useRef } from "react"
+import { X, Loader2, Check, Wand2, GripHorizontal } from "lucide-react"
 import {
   type Job, type StoryboardScene, type ImageRef,
-  effectiveFrameUrl, updateStoryboard, resolveImageRefUrl,
+  updateStoryboard, resolveImageRefUrl,
 } from "@/lib/api"
 import { toast } from "sonner"
 
@@ -29,6 +29,7 @@ export function StoryboardWorkbench({ job, selectedFrames, open, onClose, onJobU
   const [form, setForm] = useState<StoryboardScene>(emptyScene())
   const [saving, setSaving] = useState(false)
   const [savedTick, setSavedTick] = useState(0)
+  const [panelHeight, setPanelHeight] = useState(320)
   const saveTimer = useRef<ReturnType<typeof setTimeout> | null>(null)
 
   // Esc 关闭
@@ -91,98 +92,37 @@ export function StoryboardWorkbench({ job, selectedFrames, open, onClose, onJobU
     }, 600)
   }
 
-  const aspect = job.height > 0 ? `${job.width}/${job.height}` : "9/16"
+  const clampPanelHeight = (height: number) => {
+    const max = typeof window === "undefined" ? 680 : Math.max(300, window.innerHeight - 190)
+    return Math.max(180, Math.min(max, Math.round(height)))
+  }
+
+  const startResize = (e: React.PointerEvent) => {
+    e.preventDefault()
+    e.stopPropagation()
+    const startY = e.clientY
+    const startHeight = panelHeight
+    const onMove = (ev: PointerEvent) => {
+      setPanelHeight(clampPanelHeight(startHeight + ev.clientY - startY))
+    }
+    const onUp = () => {
+      window.removeEventListener("pointermove", onMove)
+      window.removeEventListener("pointerup", onUp)
+    }
+    window.addEventListener("pointermove", onMove)
+    window.addEventListener("pointerup", onUp)
+  }
 
   return (
     <div
-      className="relative z-20 h-[min(680px,calc(100vh-170px))] flex-shrink-0 border-b border-white/10 bg-black/90 backdrop-blur-xl flex flex-col shadow-2xl"
-      style={{ animation: "drawer-in 0.2s cubic-bezier(0.32, 0.72, 0, 1)" }}
+      className="relative z-20 flex-shrink-0 border-t border-white/5 border-b border-white/10 bg-black/70 backdrop-blur-xl shadow-2xl"
+      style={{ height: panelHeight, animation: "drawer-in 0.2s cubic-bezier(0.32, 0.72, 0, 1)" }}
     >
-      {/* Header */}
-      <header className="flex items-center justify-between px-5 py-2.5 border-b border-white/10 bg-black/40 flex-shrink-0">
-        <div className="flex items-center gap-2 text-white">
-          <LayoutGrid className="h-4 w-4 text-violet-300" />
-          <span className="text-[14px] font-semibold">分镜头编排工作台</span>
-          <span className="text-[11px] text-white/40 font-mono ml-2">
-            {frames.length} 分镜
-          </span>
-        </div>
-        <div className="flex items-center gap-3">
-          <span className="text-[11px] text-white/45 font-mono inline-flex items-center gap-1">
-            {saving ? (<><Loader2 className="h-2.5 w-2.5 animate-spin" /> 保存中</>)
-              : savedTick > 0 ? (<><Check className="h-2.5 w-2.5 text-emerald-300" /> 已自动保存</>)
-              : "字段变更自动保存"}
-          </span>
-          <button
-            onClick={onClose}
-            className="h-8 px-3 rounded-md bg-white/10 hover:bg-white/20 text-white inline-flex items-center gap-1.5 text-[12px]"
-            title="收起编排 (Esc)"
-          >
-            <X className="h-3.5 w-3.5" /> 收起
-          </button>
-        </div>
-      </header>
-
-      <div className="flex flex-1 min-h-0">
-        {/* 左侧分镜列表 */}
-        <aside
-          className="flex-shrink-0 border-r border-white/10 overflow-y-auto bg-black/20"
-          style={{ width: 232 }}
-        >
-          {frames.length === 0 ? (
-            <div className="p-4 text-[11px] text-white/40 leading-relaxed">
-              暂无分镜 · 到关键帧节点缩略图点「选用此帧」
-            </div>
-          ) : (
-            <div className="p-2 space-y-1">
-              {frames.map((f, i) => {
-                const isFocused = focusedIdx === f.index
-                const sb = f.storyboard
-                return (
-                  <button
-                    key={f.index}
-                    onClick={() => setFocusedIdx(f.index)}
-                    className={`w-full text-left rounded-lg p-2 transition flex gap-2 items-start ${
-                      isFocused
-                        ? "bg-violet-500/25 border border-violet-300/60"
-                        : "hover:bg-white/[0.04] border border-transparent"
-                    }`}
-                  >
-                    <div
-                      className="flex-shrink-0 rounded-md overflow-hidden bg-black"
-                      style={{ width: 64, aspectRatio: aspect }}
-                    >
-                      <img src={effectiveFrameUrl(job.id, f)} className="w-full h-full object-cover" alt="" />
-                    </div>
-                    <div className="flex-1 min-w-0">
-                      <div className="text-[11.5px] font-semibold text-white flex items-center gap-1.5">
-                        <span>分镜 {i + 1}</span>
-                        {sb?.duration ? (
-                          <span className="text-[9px] text-violet-300/80 font-mono">{sb.duration}s</span>
-                        ) : null}
-                      </div>
-                      <div className="text-[9.5px] text-white/40 font-mono">
-                        {f.timestamp.toFixed(2)}s · {f.elements?.length ?? 0} 元素
-                      </div>
-                      {sb?.subject && (
-                        <div className="text-[10px] text-white/65 truncate mt-0.5" title={sb.subject}>
-                          {sb.subject}
-                        </div>
-                      )}
-                    </div>
-                  </button>
-                )
-              })}
-            </div>
-          )}
-        </aside>
-
-        {/* 右侧详情 — 4 图槽 + 时长 */}
-        <main className="flex-1 overflow-y-auto">
-          {!focusFrame ? (
-            <div className="p-8 text-[13px] text-white/40">从左侧选一个分镜开始编排</div>
-          ) : (
-            <div className="max-w-5xl mx-auto p-6 space-y-5">
+      <div className="h-full overflow-y-auto pb-4">
+        {!focusFrame ? (
+          <div className="px-4 py-5 text-[12px] text-white/40">在上方选择一个分镜开始编排</div>
+        ) : (
+          <div className="max-w-6xl mx-auto px-4 py-4 space-y-4">
               {/* 顶栏：分镜信息 + 剪贴板提示 + 时长 */}
               <div className="flex items-center justify-between gap-4">
                 <div className="text-[15.5px] font-semibold text-white">
@@ -210,6 +150,18 @@ export function StoryboardWorkbench({ job, selectedFrames, open, onClose, onJobU
                     />
                     秒
                   </label>
+                  <span className="text-[11px] text-white/45 font-mono inline-flex items-center gap-1">
+                    {saving ? (<><Loader2 className="h-2.5 w-2.5 animate-spin" /> 保存中</>)
+                      : savedTick > 0 ? (<><Check className="h-2.5 w-2.5 text-emerald-300" /> 已保存</>)
+                      : "自动保存"}
+                  </span>
+                  <button
+                    onClick={onClose}
+                    className="h-7 px-2.5 rounded-md bg-white/10 hover:bg-white/20 text-white inline-flex items-center gap-1 text-[11.5px]"
+                    title="收起编排 (Esc)"
+                  >
+                    <X className="h-3 w-3" /> 收起
+                  </button>
                 </div>
               </div>
 
@@ -330,15 +282,17 @@ export function StoryboardWorkbench({ job, selectedFrames, open, onClose, onJobU
                   下一阶段：基于 4 图槽 + 改造目标 + 时长，先生成符合 SKG 产品的首帧，再调 Seedance / Kling / Veo3 生成视频片段
                 </div>
               </section>
-            </div>
-          )}
-        </main>
+          </div>
+        )}
       </div>
-
-      {/* 底部快捷 */}
-      <footer className="border-t border-white/10 px-5 py-1.5 text-[10px] text-white/40 font-mono text-center bg-black/40">
-        ESC 收起编排 · 字段变更自动保存
-      </footer>
+      <button
+        type="button"
+        onPointerDown={startResize}
+        className="absolute bottom-0 left-0 right-0 z-10 h-4 cursor-ns-resize border-t border-white/10 bg-black/50 text-white/45 hover:bg-violet-500/25 hover:text-white inline-flex items-center justify-center transition"
+        title="拖动上推 / 下拉调整编排区高度"
+      >
+        <GripHorizontal className="h-3.5 w-3.5" />
+      </button>
     </div>
   )
 }