diff --git a/.memory/worklog.json b/.memory/worklog.json
index d1bb45e..1ce08fc 100644
--- a/.memory/worklog.json
+++ b/.memory/worklog.json
@@ -2966,6 +2966,19 @@
       "type": "session-heartbeat",
       "message": "Codex 会话活跃 · 最近命令：codex · 3 项未提交变更 · 最近提交：auto-save 2026-05-14 02:47 (~1)",
       "files_changed": 3
+    },
+    {
+      "ts": "2026-05-14T02:53:06+08:00",
+      "type": "commit",
+      "message": "auto-save 2026-05-14 02:52 (~4)",
+      "hash": "3ab9da0",
+      "files_changed": 4
+    },
+    {
+      "ts": "2026-05-13T18:53:11Z",
+      "type": "session-heartbeat",
+      "message": "Claude 会话活跃 · 最近命令：claude · 2 项未提交变更 · 最近提交：auto-save 2026-05-14 02:52 (~4)",
+      "files_changed": 2
     }
   ]
 }
diff --git a/api/main.py b/api/main.py
index d6e0451..230ae5f 100644
--- a/api/main.py
+++ b/api/main.py
@@ -989,6 +989,19 @@ def get_job(job_id: str) -> Job:
     return job
 
 
+@app.delete("/jobs/{job_id}")
+def delete_job(job_id: str) -> dict[str, bool | str]:
+    d = (JOBS_DIR / job_id).resolve()
+    if JOBS_DIR not in d.parents:
+        raise HTTPException(400, "invalid job id")
+    job = JOBS.pop(job_id, None)
+    if not job and not d.exists():
+        raise HTTPException(404, "job not found")
+    if d.exists():
+        shutil.rmtree(d)
+    return {"ok": True, "id": job_id}
+
+
 @app.post("/jobs/{job_id}/transcribe", response_model=Job)
 async def trigger_transcribe(job_id: str, bg: BackgroundTasks) -> Job:
     job = JOBS.get(job_id)
diff --git a/docs/source-analysis.html b/docs/source-analysis.html
index 645b04e..37c7a00 100644
--- a/docs/source-analysis.html
+++ b/docs/source-analysis.html
@@ -699,6 +699,7 @@ api/main.py
             <tr><td>历史列表</td><td><code>GET /jobs</code></td><td><code>listJobs</code></td><td>所有 job 精简列表（id/url/status/thumbnail/mtime…），按 state.json mtime 倒序。前端 URL 无 <code>?job=</code> 时拉它回填全部历史；带 <code>limit</code> 可截断。</td></tr>
             <tr><td>创建任务</td><td><code>POST /jobs</code></td><td><code>createJob</code></td><td>提交 TK 链接，后台开始下载，停在 downloaded 等用户点解析。</td></tr>
             <tr><td>上传视频</td><td><code>POST /jobs/upload</code></td><td><code>uploadJob</code></td><td>保存 source.mp4，然后同样进入下载完成状态。</td></tr>
+            <tr><td>删除输入视频</td><td><code>DELETE /jobs/{id}</code></td><td><code>deleteJob</code></td><td>从任务队列、URL 和磁盘 <code>jobs/&lt;id&gt;</code> 目录移除整个 job，包括源视频、关键帧、元素提取图和生成视频。</td></tr>
             <tr><td>解析视频</td><td><code>POST /jobs/{id}/analyze</code></td><td><code>analyzeJob</code></td><td>拆轨 + 抽关键帧。当前不自动跑 ASR，避免 audio 阻塞视觉管线。</td></tr>
             <tr><td>手动加帧</td><td><code>POST /jobs/{id}/frames?t=</code></td><td><code>addManualFrame</code></td><td>按视频时间戳抽一帧，index 递增但 frames 按 timestamp 排序。</td></tr>
             <tr><td>Vision 识别</td><td><code>POST /frames/{idx}/describe</code></td><td><code>describeFrame</code></td><td>写入 frame.description，后续可从 objects 加候选元素。</td></tr>
@@ -815,6 +816,18 @@ 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>2026-05-14 · 输入视频缩略图支持删除整个 job</h3>
+              <span class="tag violet">Input</span>
+              <span class="tag blue">API</span>
+            </header>
+            <div class="body">
+              <p><strong>问题：</strong>画布顶部输入视频缩略图只有切换和预览，没有删除入口；用户清理视频队列时只能删关键帧或生成视频任务，不能删除整个输入视频。</p>
+              <p><strong>改动：</strong>新增 <code>DELETE /jobs/{id}</code>，前端新增 <code>deleteJob</code> 和 <code>onDeleteJob</code>；Input 缩略图右上角常驻删除按钮，确认后移除该 job、清理 URL 参数，并删除本地 <code>jobs/&lt;id&gt;</code> 目录。</p>
+              <p><strong>影响：</strong><code>api/main.py</code>、<code>web/lib/api.ts</code>、<code>web/app/page.tsx</code>、<code>web/components/nodes/index.tsx</code>、<code>docs/source-analysis.html</code>。</p>
+            </div>
+          </article>
           <article class="change">
             <header>
               <h3>2026-05-14 · 大图预览改为尺寸感知 Fit / 1:1</h3>
diff --git a/web/app/page.tsx b/web/app/page.tsx
index e24e647..ad2da43 100644
--- a/web/app/page.tsx
+++ b/web/app/page.tsx
@@ -15,7 +15,7 @@ import {
 } from "@/components/nodes"
 import { ThemeToggle } from "@/components/theme-toggle"
 import {
-  addManualFrame, analyzeJob, createJob, getJob, listJobs, uploadJob, deleteFrame, deleteGeneratedImage,
+  addManualFrame, analyzeJob, createJob, getJob, listJobs, uploadJob, deleteJob, deleteFrame, deleteGeneratedImage,
   deleteGeneratedVideo, deleteCutout, generateStoryboardVideo,
   type Job, type ImageRef, type StoryboardScene,
 } from "@/lib/api"
@@ -233,6 +233,29 @@ export default function Home() {
     }
   }, [activeJobId, setJob])
 
+  const handleDeleteJob = useCallback(async (jobId: string) => {
+    try {
+      await deleteJob(jobId)
+      setJobs((prev) => {
+        const idx = prev.findIndex((x) => x.id === jobId)
+        const next = prev.filter((x) => x.id !== jobId)
+        if (activeJobId === jobId) {
+          const fallback = next[idx] ?? next[idx - 1] ?? next[next.length - 1] ?? null
+          setActiveJobId(fallback?.id ?? null)
+          setSelectedFrames(new Set())
+          setExpandedFrame(null)
+          setVideoLightboxOpen(false)
+          setStoryboardFrame(null)
+          setWorkbenchOpen(false)
+        }
+        return next
+      })
+      toast.success("输入视频已删除")
+    } catch (e) {
+      toast.error("删除失败：" + (e instanceof Error ? e.message : String(e)))
+    }
+  }, [activeJobId])
+
   const handleDeleteCutout = useCallback(async (frameIdx: number, elementId: string, cutoutId: string) => {
     if (!activeJobId) return
     try {
@@ -372,9 +395,12 @@ export default function Home() {
 
   // 写回 URL（所有 jobs id 用 , 分隔）
   useEffect(() => {
-    if (jobs.length === 0) return
     const url = new URL(window.location.href)
-    url.searchParams.set("job", jobs.map((j) => j.id).join(","))
+    if (jobs.length > 0) {
+      url.searchParams.set("job", jobs.map((j) => j.id).join(","))
+    } else {
+      url.searchParams.delete("job")
+    }
     window.history.replaceState({}, "", url.toString())
   }, [jobs.length])
 
@@ -454,6 +480,7 @@ export default function Home() {
     onOpenVideoLightbox: () => setVideoLightboxOpen(true),
     onSwitchJob: handleSwitchJob,
     onJobUpdate: setJob as any,
+    onDeleteJob: handleDeleteJob,
     onDeleteFrame: handleDeleteFrame,
     onDeleteGenerated: handleDeleteGenerated,
     onDeleteVideo: handleDeleteVideo,
@@ -466,7 +493,7 @@ export default function Home() {
     onCopyImage: handleCopyImage,
     pinnedNodes,
     onToggleNodePin: handleToggleNodePin,
-  }), [job, jobs, activeJobId, submitting, analyzing, selectedFrames, expandedFrame, framePanelScale, framePanelPinned, handleSubmit, handleUpload, handleAnalyze, handleToggleFrame, handleOpenFramePanel, handleFramePanelScaleChange, handleAddManualFrame, handleSwitchJob, setJob, handleDeleteFrame, handleDeleteGenerated, handleDeleteVideo, handleDeleteCutout, handleCopyImage, pinnedNodes, handleToggleNodePin])
+  }), [job, jobs, activeJobId, submitting, analyzing, selectedFrames, expandedFrame, framePanelScale, framePanelPinned, handleSubmit, handleUpload, handleAnalyze, handleToggleFrame, handleOpenFramePanel, handleFramePanelScaleChange, handleAddManualFrame, handleSwitchJob, setJob, handleDeleteJob, handleDeleteFrame, handleDeleteGenerated, handleDeleteVideo, handleDeleteCutout, handleCopyImage, pinnedNodes, handleToggleNodePin])
 
   // 用 useNodesState 让 ReactFlow 自己管位置（避免轮询时重置 drag）
   const savedSizes = useMemo(() => loadNodeSizes(), [])
diff --git a/web/components/nodes/index.tsx b/web/components/nodes/index.tsx
index f4be8c9..caec67a 100644
--- a/web/components/nodes/index.tsx
+++ b/web/components/nodes/index.tsx
@@ -44,6 +44,7 @@ export interface NodeData {
   onOpenVideoLightbox: () => void
   onSwitchJob: (id: string) => void
   onJobUpdate: (j: Job) => void
+  onDeleteJob?: (id: string) => void
   onOpenPanel?: (key: string) => void  // 控制 sidebar 哪个 drawer 展开
   onDeleteFrame?: (idx: number) => void  // 删整张关键帧
   onDeleteGenerated?: (frameIdx: number, genId: string) => void  // 删单张生成图
@@ -411,6 +412,21 @@ export function InputNode({ data, selected }: NodeProps<{ data: NodeData }> | an
                     {ready ? `${j.duration.toFixed(1)}s` : "…"}
                   </div>
                 </button>
+                {d.onDeleteJob && (
+                  <button
+                    type="button"
+                    onClick={(e) => {
+                      e.stopPropagation()
+                      if (confirm(`删除视频任务 ${j.id.slice(0, 8)}？源视频、关键帧、元素提取图和生成视频都会一并删除。`)) {
+                        d.onDeleteJob?.(j.id)
+                      }
+                    }}
+                    title="删除这个输入视频"
+                    className="absolute right-1.5 top-1.5 z-[70] inline-flex h-7 w-7 items-center justify-center rounded-full bg-rose-500/95 text-white shadow-lg backdrop-blur transition hover:scale-110 hover:bg-rose-400"
+                  >
+                    <Trash2 className="h-3.5 w-3.5" />
+                  </button>
+                )}
               </div>
             )
           })}
diff --git a/web/lib/api.ts b/web/lib/api.ts
index 8c9b2b8..0ef54af 100644
--- a/web/lib/api.ts
+++ b/web/lib/api.ts
@@ -220,6 +220,15 @@ export async function getJob(id: string): Promise<Job> {
   return res.json()
 }
 
+export async function deleteJob(id: string): Promise<{ ok: boolean; id: string }> {
+  const res = await fetch(`${API_BASE}/jobs/${id}`, { method: "DELETE" })
+  if (!res.ok) {
+    const txt = await res.text().catch(() => "")
+    throw new Error(`deleteJob ${res.status} ${txt.slice(0, 200)}`)
+  }
+  return res.json()
+}
+
 export interface JobSummary {
   id: string
   url: string