diff --git a/src/@core/utils/__tests__/workflow.spec.ts b/src/@core/utils/__tests__/workflow.spec.ts
new file mode 100644
index 00000000..b8e7e9a7
--- /dev/null
+++ b/src/@core/utils/__tests__/workflow.spec.ts
@@ -0,0 +1,199 @@
+import useDragAndDrop from '@core/utils/workflow'
+import { mount } from '@vue/test-utils'
+import { defineComponent, h, nextTick } from 'vue'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+
+const mocks = vi.hoisted(() => ({
+  addNodes: vi.fn(),
+  screenToFlowCoordinate: vi.fn(),
+  onNodesInitialized: vi.fn(),
+  updateNode: vi.fn(),
+  off: vi.fn(),
+  onNodesInitializedCallback: undefined as (() => void) | undefined,
+}))
+
+vi.mock('@vue-flow/core', () => ({
+  useVueFlow: () => ({
+    addNodes: mocks.addNodes,
+    screenToFlowCoordinate: mocks.screenToFlowCoordinate,
+    onNodesInitialized: mocks.onNodesInitialized,
+    updateNode: mocks.updateNode,
+  }),
+}))
+
+type DragAndDrop = ReturnType<typeof useDragAndDrop>
+
+let current: DragAndDrop | undefined
+let wrapper: ReturnType<typeof mount> | undefined
+
+const Harness = defineComponent({
+  name: 'WorkflowDragAndDropHarness',
+  setup() {
+    current = useDragAndDrop()
+    return () => h('div')
+  },
+})
+
+function mountHarness() {
+  wrapper = mount(Harness)
+  return current!
+}
+
+function createDataTransfer() {
+  return {
+    effectAllowed: '',
+    dropEffect: '',
+    setData: vi.fn(),
+  }
+}
+
+describe('useDragAndDrop', () => {
+  beforeEach(() => {
+    mocks.addNodes.mockReset()
+    mocks.screenToFlowCoordinate.mockReset().mockImplementation(({ x, y }: { x: number; y: number }) => ({ x, y }))
+    mocks.onNodesInitialized.mockReset().mockImplementation((callback: () => void) => {
+      mocks.onNodesInitializedCallback = callback
+      return { off: mocks.off }
+    })
+    mocks.updateNode.mockReset()
+    mocks.off.mockReset()
+    mocks.onNodesInitializedCallback = undefined
+    document.body.style.userSelect = ''
+  })
+
+  afterEach(() => {
+    wrapper?.unmount()
+    wrapper = undefined
+    current = undefined
+    document.body.style.userSelect = ''
+  })
+
+  it('does not enter drag-over or create a node before a drag starts', async () => {
+    const dnd = mountHarness()
+    const preventDefault = vi.fn()
+
+    dnd.onDragOver({ preventDefault, dataTransfer: createDataTransfer() })
+    dnd.onDrop({ clientX: 10, clientY: 20 })
+    await nextTick()
+
+    expect(preventDefault).toHaveBeenCalledOnce()
+    expect(dnd.isDragOver.value).toBe(false)
+    expect(mocks.addNodes).not.toHaveBeenCalled()
+  })
+
+  it('tracks drag state, prevents selection, and clears everything on document drop', async () => {
+    const dnd = mountHarness()
+    const dataTransfer = createDataTransfer()
+    const data = { type: 'ScanFileAction', name: '扫描目录' }
+    const addEventListener = vi.spyOn(document, 'addEventListener')
+    const removeEventListener = vi.spyOn(document, 'removeEventListener')
+
+    dnd.onDragStart({ dataTransfer }, data)
+    await nextTick()
+    expect(dataTransfer.setData).toHaveBeenCalledWith('application/vueflow', data)
+    expect(dataTransfer.effectAllowed).toBe('move')
+    expect(dnd.draggedData.value).toEqual(data)
+    expect(dnd.isDragging.value).toBe(true)
+    expect(document.body.style.userSelect).toBe('none')
+    expect(addEventListener).toHaveBeenCalledWith('drop', expect.any(Function))
+    expect(addEventListener).toHaveBeenCalledWith('dragend', expect.any(Function))
+
+    const dragOverTransfer = createDataTransfer()
+    const preventDefault = vi.fn()
+    dnd.onDragOver({ preventDefault, dataTransfer: dragOverTransfer })
+    await nextTick()
+    expect(dnd.isDragOver.value).toBe(true)
+    expect(dragOverTransfer.dropEffect).toBe('move')
+    dnd.onDragLeave()
+    expect(dnd.isDragOver.value).toBe(false)
+
+    document.dispatchEvent(new Event('drop'))
+    await nextTick()
+    expect(dnd.draggedData.value).toBeNull()
+    expect(dnd.isDragging.value).toBe(false)
+    expect(dnd.isDragOver.value).toBe(false)
+    expect(document.body.style.userSelect).toBe('')
+    expect(removeEventListener).toHaveBeenCalledWith('drop', expect.any(Function))
+    expect(removeEventListener).toHaveBeenCalledWith('dragend', expect.any(Function))
+  })
+
+  it('clears the drag state when the browser cancels the native drag', async () => {
+    const dnd = mountHarness()
+    const removeEventListener = vi.spyOn(document, 'removeEventListener')
+
+    dnd.onDragStart({ dataTransfer: createDataTransfer() }, { type: 'NoteAction', name: '备注' })
+    await nextTick()
+    dnd.onDragOver({ preventDefault: vi.fn(), dataTransfer: createDataTransfer() })
+    await nextTick()
+
+    document.dispatchEvent(new Event('dragend'))
+    await nextTick()
+
+    expect(dnd.draggedData.value).toBeNull()
+    expect(dnd.isDragging.value).toBe(false)
+    expect(dnd.isDragOver.value).toBe(false)
+    expect(document.body.style.userSelect).toBe('')
+    expect(removeEventListener).toHaveBeenCalledWith('drop', expect.any(Function))
+    expect(removeEventListener).toHaveBeenCalledWith('dragend', expect.any(Function))
+  })
+
+  it('deep clones dropped data and centers the node after Vue Flow initializes it', async () => {
+    const dnd = mountHarness()
+    const data = {
+      type: 'ScanFileAction',
+      name: '扫描目录',
+      description: '扫描媒体目录',
+      data: { nested: { enabled: true } },
+    }
+
+    dnd.onDragStart({ dataTransfer: createDataTransfer() }, data)
+    dnd.onDrop({ clientX: 80, clientY: 120 })
+
+    expect(mocks.screenToFlowCoordinate).toHaveBeenCalledWith({ x: 80, y: 120 })
+    expect(mocks.addNodes).toHaveBeenCalledOnce()
+    const node = mocks.addNodes.mock.calls[0][0]
+    expect(node).toMatchObject({
+      type: 'ScanFileAction',
+      name: '扫描目录',
+      description: '扫描媒体目录',
+      position: { x: 80, y: 120 },
+      data: { nested: { enabled: true } },
+    })
+    expect(node.id).toMatch(/^act_/)
+    expect(node.data).not.toBe(data.data)
+
+    data.data.nested.enabled = false
+    expect(node.data.nested.enabled).toBe(true)
+
+    expect(mocks.onNodesInitialized).toHaveBeenCalledOnce()
+    mocks.onNodesInitializedCallback?.()
+    expect(mocks.updateNode).toHaveBeenCalledWith(node.id, expect.any(Function))
+    const update = mocks.updateNode.mock.calls[0][1] as (node: {
+      position: { x: number; y: number }
+      dimensions: { width: number; height: number }
+    }) => { position: { x: number; y: number } }
+    expect(update({ position: { x: 80, y: 120 }, dimensions: { width: 40, height: 20 } })).toEqual({
+      position: { x: 60, y: 110 },
+    })
+    expect(mocks.off).toHaveBeenCalledOnce()
+  })
+
+  it('cleans the global selection style and drop listener when unmounted during a drag', async () => {
+    const dnd = mountHarness()
+    const removeEventListener = vi.spyOn(document, 'removeEventListener')
+
+    dnd.onDragStart({ dataTransfer: createDataTransfer() }, { type: 'NoteAction', name: '备注' })
+    await nextTick()
+    expect(document.body.style.userSelect).toBe('none')
+
+    wrapper!.unmount()
+    await nextTick()
+
+    expect(document.body.style.userSelect).toBe('')
+    expect(dnd.isDragging.value).toBe(false)
+    expect(dnd.isDragOver.value).toBe(false)
+    expect(dnd.draggedData.value).toBeNull()
+    expect(removeEventListener).toHaveBeenCalledWith('drop', expect.any(Function))
+    expect(removeEventListener).toHaveBeenCalledWith('dragend', expect.any(Function))
+  })
+})
diff --git a/src/@core/utils/workflow.ts b/src/@core/utils/workflow.ts
index e6ccdf0d..199fe554 100644
--- a/src/@core/utils/workflow.ts
+++ b/src/@core/utils/workflow.ts
@@ -1,5 +1,5 @@
 import { useVueFlow } from '@vue-flow/core'
-import { ref, watch } from 'vue'
+import { onUnmounted, ref, watch } from 'vue'
 import { cloneDeep } from 'lodash-es'
 
 /**
@@ -18,7 +18,7 @@ const state = {
   /**
    * The type of the node being dragged.
    */
-  draggedData: ref<any | null>({}),
+  draggedData: ref<any | null>(null),
   isDragOver: ref(false),
   isDragging: ref(false),
 }
@@ -27,6 +27,7 @@ export default function useDragAndDrop() {
   const { draggedData, isDragOver, isDragging } = state
 
   const { addNodes, screenToFlowCoordinate, onNodesInitialized, updateNode } = useVueFlow()
+  let ownsDragListeners = false
 
   watch(isDragging, dragging => {
     document.body.style.userSelect = dragging ? 'none' : ''
@@ -42,6 +43,8 @@ export default function useDragAndDrop() {
     isDragging.value = true
 
     document.addEventListener('drop', onDragEnd)
+    document.addEventListener('dragend', onDragEnd)
+    ownsDragListeners = true
   }
 
   /**
@@ -70,6 +73,8 @@ export default function useDragAndDrop() {
     isDragOver.value = false
     draggedData.value = null
     document.removeEventListener('drop', onDragEnd)
+    document.removeEventListener('dragend', onDragEnd)
+    ownsDragListeners = false
   }
 
   /**
@@ -78,6 +83,8 @@ export default function useDragAndDrop() {
    * @param {DragEvent} event
    */
   function onDrop(event: any) {
+    if (!draggedData.value) return
+
     const position = screenToFlowCoordinate({
       x: event.clientX,
       y: event.clientY,
@@ -110,6 +117,12 @@ export default function useDragAndDrop() {
     addNodes(newNode)
   }
 
+  onUnmounted(() => {
+    if (!ownsDragListeners) return
+    onDragEnd()
+    document.body.style.userSelect = ''
+  })
+
   return {
     draggedData,
     isDragOver,
diff --git a/src/components/workflow/WorkflowSidebar.vue b/src/components/workflow/WorkflowSidebar.vue
index c2b9142f..bda2e781 100644
--- a/src/components/workflow/WorkflowSidebar.vue
+++ b/src/components/workflow/WorkflowSidebar.vue
@@ -102,7 +102,7 @@ watch(
 // 获取动作步骤文本
 function getActionStepText(type: string | undefined) {
   if (!type) return ''
-  return actionStepDict[type]
+  return actionStepDict[type] || type
 }
 
 onMounted(() => {
diff --git a/src/components/workflow/__tests__/WorkflowSidebar.spec.ts b/src/components/workflow/__tests__/WorkflowSidebar.spec.ts
new file mode 100644
index 00000000..e607612c
--- /dev/null
+++ b/src/components/workflow/__tests__/WorkflowSidebar.spec.ts
@@ -0,0 +1,175 @@
+import WorkflowSidebar from '@/components/workflow/WorkflowSidebar.vue'
+import i18n from '@/plugins/i18n'
+import { fireEvent, waitFor } from '@testing-library/vue'
+import { mount, type VueWrapper } from '@vue/test-utils'
+import { defineComponent, h } from 'vue'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+
+const mocks = vi.hoisted(() => ({
+  apiGet: vi.fn(),
+  onDragStart: vi.fn(),
+  smAndDown: { value: false },
+  appMode: { value: false },
+}))
+
+vi.mock('@/api', () => ({
+  default: {
+    get: (...args: unknown[]) => mocks.apiGet(...args),
+  },
+}))
+
+vi.mock('@core/utils/workflow', () => ({
+  default: () => ({ onDragStart: mocks.onDragStart }),
+}))
+
+vi.mock('@/composables/usePWA', () => ({
+  usePWA: () => ({ appMode: mocks.appMode }),
+}))
+
+vi.mock('vuetify', async importOriginal => ({
+  ...(await importOriginal<typeof import('vuetify')>()),
+  useDisplay: () => ({ smAndDown: mocks.smAndDown }),
+}))
+
+const ButtonStub = defineComponent({
+  name: 'VBtn',
+  inheritAttrs: false,
+  setup(_, { attrs, slots }) {
+    return () => h('button', { ...attrs, type: 'button' }, slots.default?.())
+  },
+})
+
+const IconButtonStub = defineComponent({
+  name: 'IconBtn',
+  inheritAttrs: false,
+  setup(_, { attrs, slots }) {
+    return () => h('button', { ...attrs, type: 'button' }, slots.default?.())
+  },
+})
+
+const IconStub = defineComponent({
+  name: 'VIcon',
+  inheritAttrs: false,
+  props: {
+    icon: {
+      type: String,
+      default: '',
+    },
+  },
+  setup(props, { attrs }) {
+    return () => h('span', { ...attrs, 'data-icon': props.icon })
+  },
+})
+
+const BoxStub = defineComponent({
+  inheritAttrs: false,
+  setup(_, { attrs, slots }) {
+    return () => h('div', attrs, slots.default?.())
+  },
+})
+
+function mountSidebar(): VueWrapper {
+  const wrapper = mount(WorkflowSidebar, {
+    global: {
+      plugins: [i18n],
+      stubs: {
+        VBtn: ButtonStub,
+        VIcon: IconStub,
+        VAvatar: BoxStub,
+        VCard: BoxStub,
+        IconBtn: IconButtonStub,
+      },
+    },
+  })
+  mountedWrappers.push(wrapper)
+  return wrapper
+}
+
+let mountedWrappers: VueWrapper[] = []
+
+describe('WorkflowSidebar', () => {
+  beforeEach(() => {
+    mocks.apiGet.mockReset().mockResolvedValue([
+      { name: '扫描目录', type: 'ScanFileAction' },
+      { name: 'UnknownActionName', type: 'UnknownAction' },
+    ])
+    mocks.onDragStart.mockReset()
+    mocks.smAndDown.value = false
+    mocks.appMode.value = false
+  })
+
+  afterEach(() => {
+    mountedWrappers.forEach(wrapper => wrapper.unmount())
+    mountedWrappers = []
+  })
+
+  it('loads actions, maps known icons, and keeps unknown action names visible', async () => {
+    const wrapper = mountSidebar()
+
+    await waitFor(() => expect(mocks.apiGet).toHaveBeenCalledWith('workflow/actions'))
+    await waitFor(() => expect(wrapper.findAll('.component-item')).toHaveLength(2))
+
+    const items = wrapper.findAll('.component-item')
+    expect(items).toHaveLength(2)
+    expect(items[0].find('.component-name').text()).toBe('Scan Directory')
+    expect(items[0].find('[data-icon]').attributes('data-icon')).toBe('mdi-folder-search')
+    expect(items[1].find('.component-name').text()).toBe('UnknownActionName')
+    expect(items[1].find('[data-icon]').attributes('data-icon')).toBe('mdi-puzzle-outline')
+  })
+
+  it('keeps an API loading failure from rendering stale or malformed actions', async () => {
+    const error = new Error('workflow actions unavailable')
+    const consoleError = vi.spyOn(console, 'error').mockImplementation(() => {})
+    mocks.apiGet.mockRejectedValueOnce(error)
+
+    const wrapper = mountSidebar()
+
+    await waitFor(() => expect(consoleError).toHaveBeenCalledWith(error))
+    expect(wrapper.findAll('.component-item')).toHaveLength(0)
+
+    consoleError.mockRestore()
+  })
+
+  it('collapses only on desktop and starts drag without treating a click as a drag', async () => {
+    const wrapper = mountSidebar()
+    await waitFor(() => expect(wrapper.findAll('.component-item')).toHaveLength(2))
+
+    expect(wrapper.find('.workflow-sidebar').classes()).not.toContain('sidebar-collapsed')
+    await fireEvent.click(wrapper.find('.collapse-btn').element)
+    expect(wrapper.find('.workflow-sidebar').classes()).toContain('sidebar-collapsed')
+    expect(wrapper.findAll('.component-info')).toHaveLength(0)
+
+    await fireEvent.click(wrapper.find('.component-item').element)
+    expect(mocks.onDragStart).not.toHaveBeenCalled()
+
+    const dataTransfer = { effectAllowed: '', setData: vi.fn() }
+    await fireEvent.dragStart(wrapper.find('.component-item').element, { dataTransfer })
+    expect(mocks.onDragStart).toHaveBeenCalledWith(expect.any(Event), expect.objectContaining({ name: '扫描目录' }))
+  })
+
+  it('opens the mobile sidebar, emits the selected action, and closes after selection', async () => {
+    mocks.smAndDown.value = true
+    mocks.appMode.value = true
+    const wrapper = mountSidebar()
+    await waitFor(() => expect(wrapper.findAll('.component-item')).toHaveLength(2))
+
+    const trigger = wrapper.find('.workflow-sidebar-trigger')
+    expect(trigger.exists()).toBe(true)
+    expect(trigger.classes()).toContain('bottom-28')
+    expect(wrapper.find('.workflow-sidebar').classes()).toContain('sidebar-mobile')
+    expect(wrapper.find('.component-item').attributes('draggable')).toBe('false')
+
+    await fireEvent.click(trigger.element)
+    expect(wrapper.find('.workflow-sidebar').classes()).toContain('sidebar-mobile-open')
+    expect(wrapper.find('.workflow-sidebar-fab [data-icon]').attributes('data-icon')).toBe('mdi-close')
+
+    await fireEvent.click(wrapper.find('.component-item').element)
+    expect(wrapper.emitted('component-click')).toEqual([[{ name: '扫描目录', type: 'ScanFileAction' }]])
+    expect(wrapper.find('.workflow-sidebar').classes()).not.toContain('sidebar-mobile-open')
+    expect(mocks.onDragStart).not.toHaveBeenCalled()
+
+    mocks.smAndDown.value = false
+    await wrapper.vm.$nextTick()
+    expect(wrapper.find('.workflow-sidebar').classes()).not.toContain('sidebar-mobile-open')
+  })
+})
diff --git a/src/pages/__tests__/music-detail.spec.ts b/src/pages/__tests__/music-detail.spec.ts
index d30d73f0..13ac30c0 100644
--- a/src/pages/__tests__/music-detail.spec.ts
+++ b/src/pages/__tests__/music-detail.spec.ts
@@ -21,6 +21,12 @@ vi.mock('@/composables/useSharedDialog', () => ({
   openSharedDialog: (...args: unknown[]) => mocks.openSharedDialog(...args),
 }))
 
+vi.mock('@/api/nprogress', () => ({
+  configureNProgress: vi.fn(),
+  doneNProgress: vi.fn(),
+  startNProgress: vi.fn(),
+}))
+
 vi.mock('@/api', () => ({
   default: createDataApiMock({
     get: (...args: unknown[]) => mocks.apiGet(...args),
diff --git a/vite.config.ts b/vite.config.ts
index be66ebc0..8002d7f6 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -309,6 +309,7 @@ export default defineConfig(({ command, mode, isPreview }) => ({
         'src/utils/permission.ts',
         'src/utils/pluginSidebarNav.ts',
         'src/utils/requestOptimizer.ts',
+        'src/@core/utils/workflow.ts',
         'src/utils/backgroundManager.ts',
         'src/utils/sseManager.ts',
         'src/utils/federationLoader.ts',
@@ -363,6 +364,7 @@ export default defineConfig(({ command, mode, isPreview }) => ({
         'src/components/dialog/UserAddEditDialog.vue',
         'src/components/dialog/WorkflowAddEditDialog.vue',
         'src/components/dialog/WorkflowActionsDialog.vue',
+        'src/components/workflow/WorkflowSidebar.vue',
         'src/components/dialog/OTPAuthDialog.vue',
         'src/components/dialog/PasskeyDialog.vue',
         'src/components/dialog/SiteCookieUpdateDialog.vue',
@@ -571,6 +573,18 @@ export default defineConfig(({ command, mode, isPreview }) => ({
           lines: 90,
           statements: 90,
         },
+        'src/components/workflow/WorkflowSidebar.vue': {
+          branches: 80,
+          functions: 85,
+          lines: 85,
+          statements: 85,
+        },
+        'src/@core/utils/workflow.ts': {
+          branches: 85,
+          functions: 90,
+          lines: 90,
+          statements: 90,
+        },
         'src/components/dialog/OTPAuthDialog.vue': {
           branches: 80,
           functions: 85,