diff --git a/src/renderer/components/Tabs.vue b/src/renderer/components/Tabs.vue
index 2eeab04c..76bead06 100644
--- a/src/renderer/components/Tabs.vue
+++ b/src/renderer/components/Tabs.vue
@@ -32,8 +32,8 @@
     </div>
     <template v-for="(btn, i) in [...actionBtns].filter(x => !x.hidden).sort((a: any, b: any) => ((a.order || 0) - (b.order || 0)))">
       <div  v-if="btn.type === 'separator'" class="action-btn-separator" :key="i" />
-      <div v-else-if="btn.type === 'normal'" :key="btn.key || `${i}`" class="action-btn" @click="btn.onClick" :title="btn.title" :style="btn.style">
-        <svg-icon :name="btn.icon" width="12px" />
+      <div v-else-if="btn.type === 'normal'" :key="btn.key || `${i}`" :class="{'action-btn': true, checked: btn.checked}" @click="btn.onClick" :title="btn.title" :style="btn.style">
+        <svg-icon :name="btn.icon" :width="btn.iconWidth || '12px'" />
       </div>
       <component v-else-if="btn.type === 'custom'" :key="btn.key || `custom-${i}`" :is="btn.component" />
     </template>
@@ -305,6 +305,12 @@ export default defineComponent({
       background-color: var(--g-color-75);
       border-radius: 50%;
     }
+
+    &.checked {
+      color: var(--g-color-0);
+      background-color: var(--g-color-75);
+      border-radius: 50%;
+    }
   }
 }
 
diff --git a/src/renderer/components/__tests__/basic-components.ts b/src/renderer/components/__tests__/basic-components.ts
index a271f550..e08783c8 100644
--- a/src/renderer/components/__tests__/basic-components.ts
+++ b/src/renderer/components/__tests__/basic-components.ts
@@ -348,6 +348,27 @@ describe('Tabs', () => {
     expect(changedList[0]).toMatchObject({ key: 'b', fixed: false, temporary: false })
   })
 
+  test('renders checked action buttons with a custom icon width', async () => {
+    const actionClick = vi.fn()
+    const wrapper = mountTabs({
+      actionBtns: [{
+        type: 'normal',
+        icon: 'thumbtack-solid',
+        iconWidth: '9px',
+        title: 'Pin',
+        checked: true,
+        onClick: actionClick,
+      }],
+    })
+
+    const pin = wrapper.find('[title="Pin"]')
+    expect(pin.classes()).toContain('checked')
+    expect(pin.findComponent(SvgIcon).props('width')).toBe('9px')
+
+    await pin.trigger('click')
+    expect(actionClick).toHaveBeenCalled()
+  })
+
   test('shows context menu, quick filter, action buttons, and cleans up hooks', async () => {
     const actionClick = vi.fn()
     const hookContextMenu = vi.fn((item, items) => {
diff --git a/src/renderer/support/__tests__/window-state.ts b/src/renderer/support/__tests__/window-state.ts
new file mode 100644
index 00000000..dbcaab42
--- /dev/null
+++ b/src/renderer/support/__tests__/window-state.ts
@@ -0,0 +1,108 @@
+import { defineComponent, h, nextTick, reactive, ref } from 'vue'
+import { mount } from '@vue/test-utils'
+
+const mocks = vi.hoisted(() => ({
+  storeState: undefined as any,
+  isSaved: undefined as any,
+  win: undefined as any,
+  listeners: new Map<string, Function>(),
+  isElectron: true,
+  isMacOS: true,
+}))
+
+vi.mock('@fe/support/store', () => ({
+  default: {
+    get state () { return mocks.storeState },
+    getters: {
+      get isSaved () { return mocks.isSaved },
+    },
+  },
+}))
+
+vi.mock('@fe/support/env', () => ({
+  get isElectron () { return mocks.isElectron },
+  get isMacOS () { return mocks.isMacOS },
+  get nodeRequire () { return mocks.isElectron },
+  getElectronRemote: () => ({
+    getCurrentWindow: () => mocks.win,
+  }),
+}))
+
+vi.mock('@fe/services/i18n', () => ({
+  useI18n: () => ({ t: (key: string) => key }),
+}))
+
+import { isWindowAlwaysOnTop, toggleWindowAlwaysOnTop, useWindowState } from '../window-state'
+
+const TestComponent = defineComponent({
+  setup () {
+    useWindowState()
+    return () => h('div')
+  },
+})
+
+beforeEach(() => {
+  mocks.storeState = reactive({
+    currentFile: { repo: 'repo', path: '/docs/a.md', name: 'a.md', status: 'saved' },
+    isFullscreen: false,
+  })
+  mocks.isSaved = ref(false)
+  mocks.listeners.clear()
+  mocks.isElectron = true
+  mocks.isMacOS = true
+  mocks.win = {
+    isAlwaysOnTop: vi.fn(() => false),
+    setAlwaysOnTop: vi.fn(),
+    setDocumentEdited: vi.fn(),
+    on: vi.fn((name: string, handler: Function) => mocks.listeners.set(name, handler)),
+    removeListener: vi.fn((name: string) => mocks.listeners.delete(name)),
+  }
+  isWindowAlwaysOnTop.value = false
+  window.onbeforeunload = null
+})
+
+describe('window state', () => {
+  test('tracks document and Electron window state without rendering a title bar', async () => {
+    const wrapper = mount(TestComponent)
+
+    expect(document.title).toBe('a.md')
+    expect(window.documentSaved).toBe(false)
+    expect(mocks.win.setDocumentEdited).toHaveBeenCalledWith(true)
+
+    toggleWindowAlwaysOnTop()
+    expect(mocks.win.setAlwaysOnTop).toHaveBeenCalledWith(true)
+
+    mocks.win.isAlwaysOnTop.mockReturnValue(true)
+    mocks.listeners.get('always-on-top-changed')?.()
+    expect(isWindowAlwaysOnTop.value).toBe(true)
+
+    mocks.listeners.get('maximize')?.()
+    expect(mocks.win.setAlwaysOnTop).toHaveBeenLastCalledWith(false)
+
+    mocks.listeners.get('enter-full-screen')?.()
+    expect(mocks.storeState.isFullscreen).toBe(true)
+    mocks.listeners.get('leave-full-screen')?.()
+    expect(mocks.storeState.isFullscreen).toBe(false)
+
+    mocks.isSaved.value = true
+    await nextTick()
+    expect(window.documentSaved).toBe(true)
+    expect(mocks.win.setDocumentEdited).toHaveBeenLastCalledWith(false)
+
+    wrapper.unmount()
+    expect(mocks.win.removeListener).toHaveBeenCalledWith('maximize', expect.any(Function))
+    expect(mocks.win.removeListener).toHaveBeenCalledWith('leave-full-screen', expect.any(Function))
+  })
+
+  test('keeps the browser unsaved-document prompt', () => {
+    mocks.isElectron = false
+    const wrapper = mount(TestComponent)
+
+    expect(window.onbeforeunload?.({} as BeforeUnloadEvent)).toBe(true)
+    mocks.isSaved.value = true
+    expect(window.onbeforeunload?.({} as BeforeUnloadEvent)).toBeNull()
+
+    wrapper.unmount()
+    expect(window.onbeforeunload).toBeNull()
+  })
+})
diff --git a/src/renderer/support/title-bar.ts b/src/renderer/support/title-bar.ts
new file mode 100644
index 00000000..8f4a21d3
--- /dev/null
+++ b/src/renderer/support/title-bar.ts
@@ -0,0 +1,22 @@
+import { shallowRef } from 'vue'
+
+export const titleBarTabsContainer = shallowRef<HTMLElement | null>(null)
+let tabsLeft = 0
+
+function applyTabsLeft () {
+  titleBarTabsContainer.value?.style.setProperty('--tabs-left', `${tabsLeft}px`)
+}
+
+export function setTitleBarTabsContainer (container: HTMLElement | null) {
+  titleBarTabsContainer.value = container
+  applyTabsLeft()
+}
+
+export function setTitleBarTabsLeft (left: number) {
+  if (!Number.isFinite(left)) {
+    return
+  }
+
+  tabsLeft = Math.max(0, left)
+  applyTabsLeft()
+}
diff --git a/src/renderer/support/window-state.ts b/src/renderer/support/window-state.ts
new file mode 100644
index 00000000..4d1cbdf7
--- /dev/null
+++ b/src/renderer/support/window-state.ts
@@ -0,0 +1,95 @@
+import { computed, onBeforeUnmount, onMounted, ref, toRefs, watch } from 'vue'
+import { getElectronRemote, isElectron, isMacOS, nodeRequire } from '@fe/support/env'
+import store from '@fe/support/store'
+import { useI18n } from '@fe/services/i18n'
+
+let win: ReturnType<ReturnType<typeof getElectronRemote>['getCurrentWindow']> | null = null
+
+export const isWindowAlwaysOnTop = ref(false)
+
+function updateAlwaysOnTop () {
+  isWindowAlwaysOnTop.value = !!win?.isAlwaysOnTop()
+}
+
+export function toggleWindowAlwaysOnTop () {
+  if (!win) {
+    return
+  }
+
+  win.setAlwaysOnTop(!win.isAlwaysOnTop())
+  updateAlwaysOnTop()
+}
+
+export function useWindowState () {
+  const { t } = useI18n()
+  const { currentFile } = toRefs(store.state)
+  const isSaved = store.getters.isSaved
+
+  function handleFullscreenEnter () {
+    store.state.isFullscreen = true
+  }
+
+  function handleFullscreenLeave () {
+    store.state.isFullscreen = false
+  }
+
+  function handleMaximize () {
+    if (win?.isAlwaysOnTop()) {
+      win.setAlwaysOnTop(false)
+    }
+    updateAlwaysOnTop()
+  }
+
+  function clean () {
+    if (!isElectron) {
+      window.onbeforeunload = null
+    }
+
+    window.removeEventListener('beforeunload', clean)
+
+    if (win) {
+      win.removeListener('maximize', handleMaximize)
+      win.removeListener('always-on-top-changed', updateAlwaysOnTop)
+      win.removeListener('enter-full-screen', handleFullscreenEnter)
+      win.removeListener('leave-full-screen', handleFullscreenLeave)
+    }
+
+    win = null
+    isWindowAlwaysOnTop.value = false
+  }
+
+  onMounted(() => {
+    if (!isElectron) {
+      window.onbeforeunload = () => !isSaved.value || null
+      return
+    }
+
+    if (nodeRequire) {
+      win = getElectronRemote().getCurrentWindow()
+      updateAlwaysOnTop()
+      win.on('maximize', handleMaximize)
+      win.on('always-on-top-changed', updateAlwaysOnTop)
+      win.on('enter-full-screen', handleFullscreenEnter)
+      win.on('leave-full-screen', handleFullscreenLeave)
+      window.addEventListener('beforeunload', clean)
+
+      if (isMacOS) {
+        win.setDocumentEdited(!isSaved.value)
+      }
+    }
+  })
+
+  onBeforeUnmount(clean)
+
+  const documentTitle = computed(() => currentFile.value ? (currentFile.value.name || 'Yank Note') : t('file-status.no-file'))
+  watch(documentTitle, title => {
+    document.title = title
+  }, { immediate: true })
+
+  watch(isSaved, (val: boolean) => {
+    window.documentSaved = val
+    if (win && isMacOS) {
+      win.setDocumentEdited(!val)
+    }
+  }, { immediate: true })
+}
diff --git a/src/renderer/types.ts b/src/renderer/types.ts
index 8aa9e647..5bd4d59c 100644
--- a/src/renderer/types.ts
+++ b/src/renderer/types.ts
@@ -179,9 +179,11 @@ export namespace Components {
       type: 'normal',
       key?: string | number,
       icon: string,
+      iconWidth?: string,
       title: string,
       order?: number,
       hidden?: boolean,
+      checked?: boolean,
       style?: string,
       onClick: (e: MouseEvent) => void,
     }