diff --git a/.memory/worklog.json b/.memory/worklog.json
index 6823750..8acf697 100644
--- a/.memory/worklog.json
+++ b/.memory/worklog.json
@@ -1589,6 +1589,19 @@
       "type": "session-heartbeat",
       "message": "Claude 会话活跃 · 最近命令：claude · 1 项未提交变更 · 最近提交：auto-save 2026-05-13 13:37 (~1)",
       "files_changed": 1
+    },
+    {
+      "ts": "2026-05-13T13:43:08+08:00",
+      "type": "commit",
+      "message": "auto-save 2026-05-13 13:42 (+1, ~4)",
+      "hash": "7e55b9b",
+      "files_changed": 5
+    },
+    {
+      "ts": "2026-05-13T05:47:39Z",
+      "type": "session-heartbeat",
+      "message": "Claude 会话活跃 · 最近命令：claude · 3 项未提交变更 · 最近提交：auto-save 2026-05-13 13:42 (+1, ~4)",
+      "files_changed": 3
     }
   ]
 }
diff --git a/web/components/nodes/index.tsx b/web/components/nodes/index.tsx
index b5b584d..ae66e66 100644
--- a/web/components/nodes/index.tsx
+++ b/web/components/nodes/index.tsx
@@ -618,8 +618,8 @@ export function ImageGenNode({ data, selected }: any) {
               style={{ aspectRatio: aspect }}
             >
               <button
-                onClick={(e) => { e.stopPropagation(); d.onOpenPanel?.("imagegen") }}
-                title={`${p.name} · 来自分镜 ${p.frameIdx + 1}`}
+                onClick={(e) => { e.stopPropagation(); d.onExpandFrame(p.frameIdx) }}
+                title={`${p.name} · 来自分镜 ${p.frameIdx + 1} · 点击进入该分镜精细调整`}
                 className="absolute inset-0 w-full h-full"
               >
                 <img
diff --git a/web/components/storyboard-bar.tsx b/web/components/storyboard-bar.tsx
index 0a89339..60eb625 100644
--- a/web/components/storyboard-bar.tsx
+++ b/web/components/storyboard-bar.tsx
@@ -1,7 +1,8 @@
 "use client"
-import { useState } from "react"
+import { useEffect, useRef, useState } from "react"
+import { createPortal } from "react-dom"
 import { LayoutGrid, ChevronDown, ChevronUp, Sparkle } from "lucide-react"
-import { type Job, effectiveFrameUrl } from "@/lib/api"
+import { type Job, type KeyFrame, effectiveFrameUrl } from "@/lib/api"
 
 interface Props {
   job: Job | null
@@ -11,6 +12,12 @@ interface Props {
 
 export function StoryboardBar({ job, selectedFrames, onExpandFrame }: Props) {
   const [collapsed, setCollapsed] = useState(false)
+  const [mounted, setMounted] = useState(false)
+  useEffect(() => setMounted(true), [])
+  // hover preview state — portal 渲染到 body 避免被父级 overflow-x-auto clip
+  const [hover, setHover] = useState<{ frame: KeyFrame; seq: number; rect: DOMRect } | null>(null)
+  const btnRefs = useRef<Record<number, HTMLButtonElement | null>>({})
+
   if (!job) return null
 
   // 按时间序排已选用的分镜
@@ -63,28 +70,31 @@ export function StoryboardBar({ job, selectedFrames, onExpandFrame }: Props) {
               return (
                 <button
                   key={f.index}
+                  ref={(el) => { btnRefs.current[f.index] = el }}
                   onClick={() => onExpandFrame(f.index)}
-                  title={`分镜 ${i + 1} · ${f.timestamp.toFixed(2)}s${cleaned ? " · 已清洗" : ""} · ${elementCount}/${totalElCount} 元素 · 点击编辑`}
-                  className="group relative shrink-0 rounded-md border border-white/15 hover:border-violet-300/60 overflow-hidden transition shadow-lg hover:-translate-y-0.5"
+                  onMouseEnter={() => {
+                    const el = btnRefs.current[f.index]
+                    if (el) setHover({ frame: f, seq: i + 1, rect: el.getBoundingClientRect() })
+                  }}
+                  onMouseLeave={() => setHover(null)}
+                  title={`分镜 ${i + 1} · ${f.timestamp.toFixed(2)}s${cleaned ? " · 已清洗" : ""} · ${elementCount}/${totalElCount} 元素 · 点击进入精细调整`}
+                  className="relative shrink-0 rounded-md border border-white/15 hover:border-violet-300/60 transition shadow-lg hover:-translate-y-0.5"
                   style={{ width: 88, aspectRatio: aspect }}
                 >
                   <img
                     src={effectiveFrameUrl(job.id, f)}
                     alt={`frame ${f.index}`}
-                    className="absolute inset-0 w-full h-full object-cover"
+                    className="absolute inset-0 w-full h-full object-cover rounded-md"
                   />
-                  {/* 左上：序号 */}
                   <div className="absolute top-1 left-1 text-[9.5px] font-bold text-white bg-violet-500/85 backdrop-blur px-1.5 py-0.5 rounded">
                     #{i + 1}
                   </div>
-                  {/* 右上：清洗标记 */}
                   {cleaned && (
                     <div className="absolute top-1 right-1 text-[9px] text-white bg-cyan-500/85 backdrop-blur px-1 py-0.5 rounded font-bold" title="已清洗">
                       ✨
                     </div>
                   )}
-                  {/* 底部：时间 + 元素数 */}
-                  <div className="absolute bottom-0 right-0 left-0 px-1.5 py-0.5 text-[9px] font-mono text-white bg-gradient-to-t from-black/85 to-transparent flex items-center justify-between">
+                  <div className="absolute bottom-0 right-0 left-0 px-1.5 py-0.5 text-[9px] font-mono text-white bg-gradient-to-t from-black/85 to-transparent flex items-center justify-between rounded-b-md">
                     <span>{f.timestamp.toFixed(1)}s</span>
                     {totalElCount > 0 && (
                       <span className="inline-flex items-center gap-0.5">
@@ -99,6 +109,38 @@ export function StoryboardBar({ job, selectedFrames, onExpandFrame }: Props) {
           </div>
         )
       )}
+
+      {/* Hover 大图预览 · portal 到 body 避免父容器 overflow clip */}
+      {mounted && hover && createPortal(
+        <div
+          className="fixed z-[120] pointer-events-none"
+          style={{
+            top: hover.rect.bottom + 8,
+            left: Math.max(12, Math.min(window.innerWidth - 380, hover.rect.left + hover.rect.width / 2 - 180)),
+            animation: "drawer-in 0.18s cubic-bezier(0.32, 0.72, 0, 1)",
+          }}
+        >
+          <div className="rounded-2xl overflow-hidden border border-white/25 bg-black" style={{ boxShadow: "0 30px 80px -10px rgba(0,0,0,0.85), 0 0 0 1px rgba(255,255,255,0.06)" }}>
+            <img
+              src={effectiveFrameUrl(job.id, hover.frame)}
+              alt={`preview ${hover.frame.index}`}
+              className="block"
+              style={{
+                width: 360,
+                maxWidth: "min(560px, 70vw)",
+                height: "auto",
+                maxHeight: "70vh",
+                objectFit: "contain",
+              }}
+            />
+            <div className="flex items-center justify-between px-3 py-2 bg-black/70 backdrop-blur-md">
+              <span className="text-white text-[12.5px] font-medium">分镜 {hover.seq} · {hover.frame.timestamp.toFixed(2)}s</span>
+              <span className="text-white/60 text-[11px] font-mono">点击进入精细调整</span>
+            </div>
+          </div>
+        </div>,
+        document.body,
+      )}
     </div>
   )
 }