diff --git a/.memory/worklog.json b/.memory/worklog.json
index cef7798..8b9ff85 100644
--- a/.memory/worklog.json
+++ b/.memory/worklog.json
@@ -2348,6 +2348,19 @@
       "message": "auto-save 2026-05-13 20:40 (~4)",
       "hash": "66f2495",
       "files_changed": 4
+    },
+    {
+      "ts": "2026-05-13T20:45:53+08:00",
+      "type": "commit",
+      "message": "auto-save 2026-05-13 20:45 (~6)",
+      "hash": "700fa24",
+      "files_changed": 6
+    },
+    {
+      "ts": "2026-05-13T12:49:30Z",
+      "type": "session-heartbeat",
+      "message": "Codex 会话活跃 · 最近命令：codex · 7 项未提交变更 · 最近提交：auto-save 2026-05-13 20:45 (~6)",
+      "files_changed": 7
     }
   ]
 }
diff --git a/api/main.py b/api/main.py
index 6646556..c3a8ea5 100644
--- a/api/main.py
+++ b/api/main.py
@@ -216,7 +216,7 @@ def ensure_video_api_configured() -> None:
     if not VIDEO_API_BASE_URL and "ai.skg.com/ezlink" in base:
         raise HTTPException(
             503,
-            "当前 SKG ezlink 网关未开通生视频 /videos 端点；请配置 VIDEO_API_BASE_URL/VIDEO_API_KEY 接 Seedance、Kling 或 Veo 3 的真实视频 API 后再生成。",
+            "当前 SKG ezlink baseurl 已连通，但这把 key 未开通生视频 /videos 端点；需要 IT 给该分组开通视频端点，或改用真实 Seedance/Kling/Veo 3 视频 API。",
         )
     if not video_api_key():
         raise HTTPException(503, "VIDEO_API_KEY 或 LLM_API_KEY 未配置，无法调用生视频 API")
diff --git a/docs/source-analysis.html b/docs/source-analysis.html
index 47101ad..b3d420e 100644
--- a/docs/source-analysis.html
+++ b/docs/source-analysis.html
@@ -830,6 +830,30 @@ 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 · 视频 API 未开通时前置禁用按钮</h3>
+              <span class="tag violet">StoryboardWorkbench</span>
+              <span class="tag blue">Health</span>
+            </header>
+            <div class="body">
+              <p><strong>问题：</strong>当前 SKG ezlink 未开 <code>/videos</code>，用户点生成后才看到失败 toast，容易误以为是某个分镜或模型选择错误。</p>
+              <p><strong>改动：</strong>前端启动时读取 <code>/health</code> 的 <code>models.video_configured</code>；若为 false，分镜编排的生视频区域直接显示“视频 API 未开通”，并禁用提交按钮。</p>
+              <p><strong>影响：</strong><code>web/lib/api.ts</code>、<code>web/app/page.tsx</code>、<code>web/components/storyboard-workbench.tsx</code>。</p>
+            </div>
+          </article>
+          <article class="change">
+            <header>
+              <h3>2026-05-13 · 生视频错误提示改为可读原因</h3>
+              <span class="tag rose">VideoGenNode</span>
+              <span class="tag blue">API</span>
+            </header>
+            <div class="body">
+              <p><strong>问题：</strong>提交生视频失败时，前端把 <code>generateStoryboardVideo 503 {"detail": ...}</code> 原样展示，用户无法快速判断是配置、端点还是 UI 问题。</p>
+              <p><strong>改动：</strong><code>generateStoryboardVideo</code> 解析后端 JSON 的 <code>detail</code> 后再抛错；后端 503 文案改为“SKG ezlink 已连通但当前 key 未开 /videos”；Video Gen 失败卡把 <code>/videos 404</code> 长错误压缩成一句可读原因。</p>
+              <p><strong>影响：</strong><code>web/lib/api.ts</code>、<code>web/components/nodes/index.tsx</code>、<code>api/main.py</code>。</p>
+            </div>
+          </article>
           <article class="change">
             <header>
               <h3>2026-05-13 · Video Gen 卡片增加复制和删除</h3>
diff --git a/web/app/page.tsx b/web/app/page.tsx
index 2b75b44..dfe7fcf 100644
--- a/web/app/page.tsx
+++ b/web/app/page.tsx
@@ -16,9 +16,9 @@ import { ThemeToggle } from "@/components/theme-toggle"
 import { StoryboardBar } from "@/components/storyboard-bar"
 import { StoryboardWorkbench } from "@/components/storyboard-workbench"
 import {
-  addManualFrame, analyzeJob, createJob, getJob, uploadJob, deleteFrame, deleteGeneratedImage,
+  addManualFrame, analyzeJob, createJob, getHealth, getJob, uploadJob, deleteFrame, deleteGeneratedImage,
   deleteGeneratedVideo, generateStoryboardVideo,
-  type Job, type ImageRef, type StoryboardScene,
+  type BackendHealth, type Job, type ImageRef, type StoryboardScene,
 } from "@/lib/api"
 import { VideoLightbox } from "@/components/video-lightbox"
 
@@ -77,6 +77,7 @@ export default function Home() {
   const [storyboardFrame, setStoryboardFrame] = useState<number | null>(null)
   const [workbenchOpen, setWorkbenchOpen] = useState(false)
   const [clipboard, setClipboard] = useState<ImageRef | null>(null)
+  const [backendHealth, setBackendHealth] = useState<BackendHealth | null>(null)
   const flowRef = useRef<any>(null)
 
   // 把 setJob(prev=>...) 翻译成 setJobs 里更新当前 active
@@ -228,6 +229,10 @@ export default function Home() {
 
   const handleQuickGenerateVideo = useCallback(async (frameIdx: number, scene: StoryboardScene, model: string) => {
     if (!job) return
+    if (backendHealth?.models?.video_configured === false) {
+      toast.error("当前 SKG ezlink 未开通生视频端点，不能提交视频任务")
+      return
+    }
     const frame = job.frames.find((f) => f.index === frameIdx)
     if (!frame) return
 
@@ -265,7 +270,13 @@ export default function Home() {
     } catch (e) {
       toast.error("提交视频失败：" + (e instanceof Error ? e.message : String(e)))
     }
-  }, [job, setJob])
+  }, [job, setJob, backendHealth?.models?.video_configured])
+
+  useEffect(() => {
+    getHealth()
+      .then(setBackendHealth)
+      .catch(() => setBackendHealth(null))
+  }, [])
 
   // URL ?job=xxx,yyy 自动恢复多个 job
   useEffect(() => {
@@ -487,6 +498,7 @@ export default function Home() {
               onJobUpdate={setJob as any}
               clipboard={clipboard}
               focusedFrame={storyboardFrame}
+              videoConfigured={backendHealth?.models?.video_configured}
               onGenerateVideo={handleQuickGenerateVideo}
             />
           </div>
diff --git a/web/components/nodes/index.tsx b/web/components/nodes/index.tsx
index 3171ce6..de304ac 100644
--- a/web/components/nodes/index.tsx
+++ b/web/components/nodes/index.tsx
@@ -960,6 +960,13 @@ export function VideoGenNode({ data, selected }: any) {
     if (m.includes("seedance")) return "Seedance"
     return model || "Video"
   }
+  const readableVideoError = (error?: string) => {
+    const e = error || "生成失败"
+    if (e.includes("/videos") && e.includes("404")) {
+      return "当前 SKG ezlink 未开通生视频 /videos 端点"
+    }
+    return e
+  }
   return (
     <div className="relative" style={{ width: 280 }}>
       {videos.length > 0 && (
@@ -1075,7 +1082,7 @@ export function VideoGenNode({ data, selected }: any) {
                       <span className="shrink-0 font-mono text-white/55">{modelLabel(v.model)} · {v.status}</span>
                     </div>
                     <div className="line-clamp-3 text-[9.5px] leading-snug text-white/55">
-                      {v.status === "failed" ? (v.error || "生成失败") : v.prompt}
+                      {v.status === "failed" ? readableVideoError(v.error) : v.prompt}
                     </div>
                   </div>
                 </div>
diff --git a/web/components/storyboard-workbench.tsx b/web/components/storyboard-workbench.tsx
index 7bb41bc..1f2167c 100644
--- a/web/components/storyboard-workbench.tsx
+++ b/web/components/storyboard-workbench.tsx
@@ -15,6 +15,7 @@ interface Props {
   onJobUpdate?: (j: Job) => void
   clipboard: ImageRef | null  // 全局剪贴板（page.tsx 提供）
   focusedFrame: number | null
+  videoConfigured?: boolean
   onGenerateVideo?: (frameIdx: number, scene: StoryboardScene, model: string) => Promise<void> | void
 }
 
@@ -28,7 +29,7 @@ const VIDEO_MODELS = [
   { value: "veo3", label: "Veo 3" },
 ] as const
 
-export function StoryboardWorkbench({ job, selectedFrames, open, onClose, onJobUpdate, clipboard, focusedFrame, onGenerateVideo }: Props) {
+export function StoryboardWorkbench({ job, selectedFrames, open, onClose, onJobUpdate, clipboard, focusedFrame, videoConfigured, onGenerateVideo }: Props) {
   const [mounted, setMounted] = useState(false)
   useEffect(() => setMounted(true), [])
 
@@ -124,6 +125,7 @@ export function StoryboardWorkbench({ job, selectedFrames, open, onClose, onJobU
 
   const hasVideoRefs = !!(form.subject_image || form.scene_image || form.product_image || form.action_image)
   const currentModelLabel = VIDEO_MODELS.find((m) => m.value === videoModel)?.label ?? "Seedance"
+  const videoUnavailable = videoConfigured === false
 
   return (
     <div
@@ -302,8 +304,13 @@ export function StoryboardWorkbench({ job, selectedFrames, open, onClose, onJobU
                     ))}
                   </div>
                 </div>
+                {videoUnavailable && (
+                  <div className="mb-2 rounded-md border border-amber-300/25 bg-amber-500/10 px-2.5 py-2 text-[10.5px] leading-relaxed text-amber-100/80">
+                    当前 SKG ezlink 只连通基础网关，但未开通生视频 /videos 端点；这里先禁用提交，避免继续产生失败任务。
+                  </div>
+                )}
                 <button
-                  disabled={!hasVideoRefs || focusedIdx === null || generating}
+                  disabled={videoUnavailable || !hasVideoRefs || focusedIdx === null || generating}
                   onClick={async () => {
                     if (focusedIdx === null) return
                     queueSave(form)
@@ -315,13 +322,15 @@ export function StoryboardWorkbench({ job, selectedFrames, open, onClose, onJobU
                     }
                   }}
                   className="w-full py-3 rounded-lg text-[13.5px] font-semibold inline-flex items-center justify-center gap-2 bg-gradient-to-r from-rose-500 to-violet-500 text-white border border-violet-300/40 shadow-lg shadow-violet-500/20 hover:from-rose-400 hover:to-violet-400 disabled:opacity-40 disabled:cursor-not-allowed"
-                  title={hasVideoRefs ? `调用 ${currentModelLabel} 生视频 API，结果进入 Video Gen 节点` : "先粘贴至少一张参考图"}
+                  title={videoUnavailable ? "当前视频 API 未开通" : hasVideoRefs ? `调用 ${currentModelLabel} 生视频 API，结果进入 Video Gen 节点` : "先粘贴至少一张参考图"}
                 >
                   {generating ? <Loader2 className="h-4 w-4 animate-spin" /> : <Wand2 className="h-4 w-4" />}
-                  调用 {currentModelLabel} 生成视频
+                  {videoUnavailable ? "视频 API 未开通" : `调用 ${currentModelLabel} 生成视频`}
                 </button>
                 <div className="mt-2 text-[10.5px] text-white/35 leading-relaxed">
-                  用当前 4 图槽、改造目标和时长提交生视频 API；生成中的进度和完成后的 MP4 会显示在 Video Gen 节点。
+                  {videoUnavailable
+                    ? "需要 IT 给当前 key 分组开通 /videos，或配置外部 VIDEO_API_BASE_URL/VIDEO_API_KEY 后再生成。"
+                    : "用当前 4 图槽、改造目标和时长提交生视频 API；生成中的进度和完成后的 MP4 会显示在 Video Gen 节点。"}
                 </div>
               </section>
           </div>
diff --git a/web/lib/api.ts b/web/lib/api.ts
index 9a629bd..c21f890 100644
--- a/web/lib/api.ts
+++ b/web/lib/api.ts
@@ -146,12 +146,33 @@ export interface Job {
   error?: string
 }
 
+export interface BackendHealth {
+  ok: boolean
+  llm_configured: boolean
+  base_url: string
+  models?: {
+    asr?: string
+    translate?: string
+    rewrite?: string
+    video?: string
+    video_aliases?: Record<string, string>
+    video_base_url?: string
+    video_configured?: boolean
+  }
+}
+
 export function apiAssetUrl(path?: string | null): string {
   if (!path) return ""
   if (/^https?:\/\//i.test(path)) return path
   return `${API_BASE}${path.startsWith("/") ? "" : "/"}${path}`
 }
 
+export async function getHealth(): Promise<BackendHealth> {
+  const res = await fetch(`${API_BASE}/health`)
+  if (!res.ok) throw new Error(`health ${res.status}`)
+  return res.json()
+}
+
 export async function createJob(tkUrl: string): Promise<Job> {
   const res = await fetch(`${API_BASE}/jobs`, {
     method: "POST",
@@ -372,7 +393,12 @@ export async function generateStoryboardVideo(
   })
   if (!res.ok) {
     const txt = await res.text().catch(() => "")
-    throw new Error(`generateStoryboardVideo ${res.status} ${txt.slice(0, 300)}`)
+    let detail = txt
+    try {
+      const parsed = JSON.parse(txt)
+      detail = parsed?.detail || txt
+    } catch {}
+    throw new Error(detail || `generateStoryboardVideo ${res.status}`)
   }
   return res.json()
 }