合入：工作流可以改名（画布顶栏、工作流列表各一个入口；服务端拦空名、超长、重名，内置模板不改名）

frontend/src/canvas/WorkflowPicker.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useMemo, useRef, useState } from 'react'
 import { useNavigate } from 'react-router-dom'
-import { Check, Copy, Layers, LayoutTemplate, Plus, Search, Trash2, Workflow as WorkflowIcon } from 'lucide-react'
+import { Check, Copy, Layers, LayoutTemplate, Pencil, Plus, Search, Trash2, Workflow as WorkflowIcon } from 'lucide-react'
 import clsx from 'clsx'
 import { api } from '../api/client'
 import { useCatalog } from '../store/catalog'
@@ -156,6 +156,35 @@ export async function createWorkflow(
   }
 }
 
+/**
+ * 给工作流改名。只改名字：不加版本、不碰图，画布上还没保存的改动原样留着（改的正是画布上打开的这一张时，只换它的名字）。
+ * 同名、空名在这里先拦一道，服务端也拦（api/workflows._checked_name）；内置模板不给改名入口（启动时按名字补内置模板，
+ * 服务端会拒），要改就「以此模板新建」。
+ */
+export async function renameWorkflow(w: Workflow, refresh: () => Promise<void> | void): Promise<Workflow | null> {
+  const names = new Set(useCatalog.getState().workflows.filter((x) => x.id !== w.id).map((x) => x.name))
+  const raw = await promptDialog({
+    title: `重命名「${w.name}」`,
+    label: '名称',
+    initial: w.name,
+    confirmLabel: '重命名',
+    validate: (v) => (!v.trim() ? '名称不能为空' : names.has(v.trim()) ? '已存在同名工作流，请使用其他名称' : null),
+  })
+  const name = raw?.trim()
+  if (!name || name === w.name) return null
+  try {
+    const updated = await api.workflows.update(w.id, { name })
+    const open = useStudio.getState().workflow
+    if (open?.id === w.id) useStudio.setState({ workflow: { ...open, name: updated.name } })
+    void refresh()
+    toast.ok(`已重命名为「${updated.name}」`)
+    return updated
+  } catch (e) {
+    toast.error(e)
+    return null
+  }
+}
+
 function StatusChip({ w }: { w: Workflow }) {
   const p = w.published_version
   // 当前发布版的级别看 published_level（同工具栏的版本标签）：画布上改过之后 status 回到草稿，受管发布版照实写「受管」
@@ -370,6 +399,11 @@ export function WorkflowPicker({ open, onClose }: { open: boolean; onClose: () =
                       <Plus size={11} /> 以此模板新建
                     </button>
                   )}
+                  {!w.is_template && (
+                    <IconButton label={`重命名「${w.name}」`} title="重命名"
+                                className="text-faint group-hover:text-dim"
+                                onClick={() => void renameWorkflow(w, refresh)} icon={<Pencil size={11} />} />
+                  )}
                   <IconButton label={`复制「${w.name}」`} title="复制"
                               className="text-faint group-hover:text-dim"
                               onClick={() => void duplicate(w)} icon={<Copy size={11} />} />

frontend/src/pages/StudioPage.tsx

@@ -1,7 +1,7 @@
 import { useCallback, useEffect, useId, useMemo, useRef, useState, type ReactNode } from 'react'
 import { useLocation, useNavigate, useParams, useSearchParams } from 'react-router-dom'
 import {
-  AlertTriangle, Check, ChevronDown, History, LayoutGrid, MoreHorizontal, PanelRightClose, PanelRightOpen, Plus,
+  AlertTriangle, Check, ChevronDown, History, LayoutGrid, MoreHorizontal, PanelRightClose, PanelRightOpen, Pencil, Plus,
   Redo2, RotateCw, Save, ShieldCheck, Square, Undo2, Variable, Wand2, XCircle,
 } from 'lucide-react'
 import clsx from 'clsx'
@@ -13,7 +13,7 @@ import { CanvasDock, type DockTab } from '../canvas/CanvasDock'
 import { LineageLayer } from '../canvas/LineageLayer'
 import { VersionsSheet } from '../canvas/VersionsSheet'
 import { PublishDialog } from '../canvas/PublishDialog'
-import { WorkflowPicker, confirmDiscard, createWorkflow, takeDiscarded } from '../canvas/WorkflowPicker'
+import { WorkflowPicker, confirmDiscard, createWorkflow, renameWorkflow, takeDiscarded } from '../canvas/WorkflowPicker'
 import { fieldOfIssue, problemsOf, type Problem } from '../canvas/issues'
 import { STUDIO_SHORTCUTS, hintOf, studioShortcut, type StudioShortcutId } from '../canvas/shortcuts'
 import { AssistantPanel } from '../run/AssistantPanel'
@@ -527,6 +527,11 @@ export function StudioPage() {
           <span className="max-w-56 truncate font-medium @max-[1120px]:max-w-32">{workflow?.name ?? '选择工作流'}</span>
           <ChevronDown size={12} className="shrink-0 text-faint" />
         </button>
+        {/* 改名只改名字，画布上没保存的改动不受影响；内置模板不给改名（见 renameWorkflow） */}
+        {workflow && !workflow.is_template && (
+          <IconButton label={`重命名「${workflow.name}」`} title="重命名" className="-ml-1 shrink-0 text-faint hover:text-dim"
+                      onClick={() => void renameWorkflow(workflow, refresh)} icon={<Pencil size={12} />} />
+        )}
 
         {workflow && <VersionLabel workflow={workflow} />}
         {dirty && (