工作流可以改名：画布顶栏名字旁边、工作流列表每一行多一个「重命名」，两处共用 canvas/WorkflowPicker.renameWorkflow——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（改的正是打开的这一张时只换它的名字）。服务端 PATCH /api/workflows/{id} 的名字以前原样写入：现在去掉首尾空白，空名 422、超过 200 字 422、和别的工作流同名 409；内置模板不许改名（启动时 seed_defaults 按名字补内置模板，改了名下次启动会再导入一份原名的），界面上也不给模板改名入口，要改就「以此模板新建」。测试 tests/test_workflow_rename.py

backend/app/api/workflows.py

@@ -203,6 +203,33 @@ async def get_workflow(
     return await _workflow_out(session, workflow)
 
 
+#: 工作流名称最长多少字（workflows.name 是 String(200)）
+NAME_MAX = 200
+
+
+async def _checked_name(session: AsyncSession, workflow: Workflow, given: str) -> str:
+    """改名：去掉首尾空白，不许空、不许超长、不许和别的工作流同名。
+
+    内置模板不许改名：启动时补内置模板是按名字认的（seed.seed_defaults），改了名下次启动会再导入一份原名的。要改名就
+    「以此模板新建」，改新建的那一份。名字没变（只是首尾多了空白）的照常放行。
+    """
+    name = given.strip()
+    if not name:
+        raise HTTPException(422, "工作流名称不能为空")
+    if len(name) > NAME_MAX:
+        raise HTTPException(422, f"工作流名称最多 {NAME_MAX} 个字")
+    if name == workflow.name:
+        return name
+    from app.seed import TEMPLATES
+
+    if workflow.is_template and workflow.name in {t["name"] for t in TEMPLATES}:
+        raise HTTPException(409, "内置模板的名称由系统维护，不能修改：可以「以此模板新建」，再给新建的工作流改名")
+    taken = await session.scalar(select(Workflow.id).where(Workflow.name == name, Workflow.id != workflow.id).limit(1))
+    if taken:
+        raise HTTPException(409, f"已存在同名工作流「{name}」，请使用其他名称")
+    return name
+
+
 @router.patch("/{workflow_id}", response_model=WorkflowOut)
 async def update_workflow(
     workflow_id: str, payload: WorkflowPatch, session: AsyncSession = Depends(get_session)
@@ -212,7 +239,7 @@ async def update_workflow(
         raise HTTPException(404, _GONE)
 
     if payload.name is not None:
-        workflow.name = payload.name
+        workflow.name = await _checked_name(session, workflow, payload.name)
     if payload.description is not None:
         workflow.description = payload.description
     if payload.tags is not None:

backend/tests/test_workflow_rename.py

@@ -0,0 +1,66 @@
+"""工作流改名（PATCH /api/workflows/{id} 的 name）：去掉首尾空白，不许空、超长、和别的工作流同名；内置模板不许改名。
+
+以前名字原样写进去：空名、重名都能存，界面上也没有改名的入口。改名只动名字，不加版本、不碰图。
+"""
+from __future__ import annotations
+
+import pytest
+from httpx import ASGITransport, AsyncClient
+
+from app.db.base import SessionLocal
+from app.db.models import Workflow
+from app.main import app
+from app.seed import TEMPLATES
+
+GRAPH = {"nodes": [{"id": "start", "type": "input", "position": {"x": 0, "y": 0},
+                    "data": {"label": "开始", "config": {"fields": [{"name": "question"}]}}}], "edges": []}
+
+
+@pytest.fixture
+async def client():
+    async with AsyncClient(transport=ASGITransport(app=app), base_url="http://test") as c:
+        yield c
+
+
+async def _make(client: AsyncClient, name: str) -> dict:
+    r = await client.post("/api/workflows", json={"name": name, "graph": GRAPH})
+    assert r.status_code in (200, 201), r.text
+    return r.json()
+
+
+async def test_a_workflow_can_be_renamed_without_a_new_version(client):
+    w = await _make(client, "周报草稿-改名测试")
+    r = await client.patch(f"/api/workflows/{w['id']}", json={"name": "  经营周报-改名测试  "})
+    assert r.status_code == 200, r.text
+    got = r.json()
+    assert got["name"] == "经营周报-改名测试", "首尾空白去掉"
+    assert got["version"] == w["version"], "只改名不加版本"
+    assert got["graph"] == w["graph"]
+
+
+async def test_empty_too_long_and_taken_names_are_refused(client):
+    a = await _make(client, "甲-改名测试")
+    await _make(client, "乙-改名测试")
+    r = await client.patch(f"/api/workflows/{a['id']}", json={"name": "   "})
+    assert r.status_code == 422 and "不能为空" in r.json()["detail"]
+    r = await client.patch(f"/api/workflows/{a['id']}", json={"name": "长" * 201})
+    assert r.status_code == 422 and "最多" in r.json()["detail"]
+    r = await client.patch(f"/api/workflows/{a['id']}", json={"name": "乙-改名测试"})
+    assert r.status_code == 409 and "同名" in r.json()["detail"]
+    r = await client.patch(f"/api/workflows/{a['id']}", json={"name": "甲-改名测试 "})
+    assert r.status_code == 200, "名字没变（只多了空白）照常放行，不算和自己重名"
+    async with SessionLocal() as s:
+        assert (await s.get(Workflow, a["id"])).name == "甲-改名测试"
+
+
+async def test_a_built_in_template_keeps_its_name(client):
+    builtin = TEMPLATES[0]["name"]
+    async with SessionLocal() as s:
+        row = Workflow(name=builtin, description="", graph=GRAPH, tags=["template"], is_template=True)
+        s.add(row)
+        await s.commit()
+        wid = row.id
+    r = await client.patch(f"/api/workflows/{wid}", json={"name": "我的模板-改名测试"})
+    assert r.status_code == 409 and "内置模板" in r.json()["detail"], "启动时按名字补内置模板，改了名会再导入一份"
+    r = await client.patch(f"/api/workflows/{wid}", json={"description": "只改说明可以"})
+    assert r.status_code == 200 and r.json()["name"] == builtin

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 && (