diff --git a/core/backend/README.md b/core/backend/README.md
index 1f3abc7..c20211e 100644
--- a/core/backend/README.md
+++ b/core/backend/README.md
@@ -19,7 +19,7 @@ Start workers in separate terminals:
 ```bash
 cd /Users/maidong/Desktop/zyc/qiyuan_gitea/AirShelf/core/backend
 source .venv/bin/activate
-celery -A airshelf worker -l info
+celery -A airshelf worker -l info -P threads -c 4   # 线程池 4 并发(出图/视频可并行;勿用 -P solo 串行)
 ```
 
 `ffmpeg` must be available on `PATH` for Stage5 export jobs.
diff --git a/core/frontend/src/design-restraint.css b/core/frontend/src/design-restraint.css
index a477822..875fc5d 100644
--- a/core/frontend/src/design-restraint.css
+++ b/core/frontend/src/design-restraint.css
@@ -869,6 +869,7 @@ main { position: relative; background: var(--background-base); min-width: 0; }
 }
 .chip-wrap.open .chip-menu { display: block; }
 .chip-menu.align-right { left: auto; right: 0; }
+.chip-menu.align-up { top: auto; bottom: calc(100% + 4px); }
 .chip-menu .mi {
   height: 32px; padding: 0 10px;
   font-size: 13px; color: var(--accent-black);
diff --git a/core/frontend/src/routes/pipeline.tsx b/core/frontend/src/routes/pipeline.tsx
index 9cd9883..5b34f3c 100644
--- a/core/frontend/src/routes/pipeline.tsx
+++ b/core/frontend/src/routes/pipeline.tsx
@@ -842,6 +842,16 @@ export function PipelinePage(props: {
   // 脚本模型下拉:用户可选 豆包/GPT-5.5/Gemini(空 = 用后端默认文本模型)
   const [scriptModelId, setScriptModelId] = useState<string>("");
   const activeScriptModelId = scriptModelId || textModels?.[0]?.id || "";
+  // 模型选择小按钮(输入框下方)· 自建 restraint 下拉(幽灵触发 + popover 菜单),不再用原生 select + inline
+  const [modelMenuOpen, setModelMenuOpen] = useState(false);
+  const activeModel = textModels?.find((m) => m.id === activeScriptModelId);
+  const activeModelName = activeModel?.display_name || activeModel?.name || "默认模型";
+  useEffect(() => {
+    if (!modelMenuOpen) return;
+    const close = (e: MouseEvent) => { if (!(e.target as HTMLElement).closest(".chat-model-pick")) setModelMenuOpen(false); };
+    document.addEventListener("click", close);
+    return () => document.removeEventListener("click", close);
+  }, [modelMenuOpen]);
   // 删除分镜的两步确认(行内变红,3 秒不二次点击自动复位;不用原生 confirm)
   const [armedDelete, setArmedDelete] = useState<string | null>(null);
   // 行35 · 单条分镜重跑 / 删除的即时反馈:正在处理的 shot id(按钮转「处理中」并禁用)
@@ -2267,17 +2277,24 @@ export function PipelinePage(props: {
                       <button className="chat-icon-btn" id="chat-upload-btn" type="button" title="上传脚本附件" aria-label="上传脚本附件" onClick={() => chatFileRef.current?.click()}>
                         <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round"><path d="M12 5v14M5 12h14" /></svg>
                       </button>
-                      {/* 模型选择小按钮(放输入框下方,对齐 ChatGPT/Lovart) */}
+                      {/* 模型选择小按钮(输入框下方,对齐 ChatGPT/Lovart)· 复用 restraint chip 下拉,向上展开 */}
                       {textModels && textModels.length > 0 ? (
-                        <select
-                          className="setup-select"
-                          style={{ height: 26, fontSize: 12, padding: "0 6px", maxWidth: 150, marginLeft: 6 }}
-                          value={activeScriptModelId}
-                          onChange={(event) => setScriptModelId(event.target.value)}
-                          title="选择脚本生成模型(豆包 / GPT / Gemini)"
-                        >
-                          {textModels.map((m) => <option key={m.id} value={m.id}>{m.display_name || m.name}</option>)}
-                        </select>
+                        <div className={`chip-wrap${modelMenuOpen ? " open" : ""}`}>
+                          <button type="button" className="chip" title="选择脚本生成模型(豆包 / GPT / Gemini)" onClick={() => setModelMenuOpen((v) => !v)}>
+                            {activeModelName}
+                            <svg className="caret" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="m6 9 6 6 6-6" /></svg>
+                          </button>
+                          <div className="chip-menu align-up">
+                            {textModels.map((m) => (
+                              <div key={m.id} className={`mi${m.id === activeScriptModelId ? " selected" : ""}`} role="menuitemradio" aria-checked={m.id === activeScriptModelId} tabIndex={0}
+                                onClick={() => { setScriptModelId(m.id); setModelMenuOpen(false); }}
+                                onKeyDown={(e) => { if (e.key === "Enter" || e.key === " ") { e.preventDefault(); setScriptModelId(m.id); setModelMenuOpen(false); } }}>
+                                {m.display_name || m.name}
+                                <svg className="mi-check" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.6" strokeLinecap="round" strokeLinejoin="round"><path d="M20 6 9 17l-5-5" /></svg>
+                              </div>
+                            ))}
+                          </div>
+                        </div>
                       ) : null}
                       <span className="spacer"></span>
                       <button className="chat-send-btn" id="chat-send-btn" type="button" title="发送" aria-label="发送" disabled={loading || (!setupOpen && !chatText.trim() && pendingTagEdits.length === 0)} onClick={submitChat}>
diff --git a/k8s/core/worker-deployment.yaml b/k8s/core/worker-deployment.yaml
index ff9907d..ebecfd7 100644
--- a/k8s/core/worker-deployment.yaml
+++ b/k8s/core/worker-deployment.yaml
@@ -23,7 +23,7 @@ spec:
         # Celery worker connects to the external (Volcano managed) Redis broker
         # configured via the airshelf-core-env secret. Uses `args` (not `command`)
         # so the image ENTRYPOINT still runs but skips migrate/collectstatic ($1=celery).
-        args: ["celery", "-A", "airshelf.celery:app", "worker", "-l", "info", "--concurrency", "2"]
+        args: ["celery", "-A", "airshelf.celery:app", "worker", "-l", "info", "--concurrency", "4"]
         envFrom:
         - secretRef:
             name: airshelf-core-env
diff --git a/交接-AI生成Agent化-2026-06-17.md b/交接-AI生成Agent化-2026-06-17.md
index fcf3ff2..1e2af04 100644
--- a/交接-AI生成Agent化-2026-06-17.md
+++ b/交接-AI生成Agent化-2026-06-17.md
@@ -15,7 +15,8 @@ cd core/backend
 .venv/Scripts/python.exe manage.py migrate          # 跑新迁移(0005/0006 + projects 0002)
 .venv/Scripts/python.exe manage.py runserver 0.0.0.0:8010
 # 另起 celery worker(图片/故事板/视频是异步,靠 worker 执行;没 worker 这几趴会卡)
-.venv/Scripts/python.exe -m celery -A airshelf worker -l info -P solo
+# -P threads -c 4 = 线程池 4 并发(Windows 不能用 prefork;-P solo 是单任务串行=一次只生成一张,别再用 solo)
+.venv/Scripts/python.exe -m celery -A airshelf worker -l info -P threads -c 4
 
 # 前端(端口 5173,vite 代理 /api → 8010)
 cd core/frontend