feat: add resizable desktop panes

frontend/e2e/desktop-shell-resize.spec.ts

@@ -0,0 +1,89 @@
+import type { APIRequestContext, Page } from '@playwright/test'
+import { expect, test } from './fixtures'
+
+async function csrf(request: APIRequestContext) {
+  const state = await request.storageState()
+  return state.cookies.find(cookie => cookie.name === 'dodo_csrf')?.value ?? ''
+}
+
+async function createTask(request: APIRequestContext, baseURL: string, title: string) {
+  const bootstrap = await request.get('/api/v1/bootstrap')
+  expect(bootstrap.ok(), await bootstrap.text()).toBeTruthy()
+  const inbox = (await bootstrap.json()).lists.find((item: { is_inbox: boolean }) => item.is_inbox)
+  const response = await request.post('/api/v1/tasks', {
+    data: { title, list_id: inbox.id },
+    headers: { 'x-csrf-token': await csrf(request), origin: baseURL },
+  })
+  expect(response.ok(), await response.text()).toBeTruthy()
+}
+
+async function dragSeparator(page: Page, label: string, deltaX: number) {
+  const separator = page.getByRole('separator', { name: label })
+  const box = await separator.boundingBox()
+  expect(box).not.toBeNull()
+  const x = box!.x + box!.width / 2
+  const y = box!.y + Math.min(120, box!.height / 2)
+  await page.mouse.move(x, y)
+  await page.mouse.down()
+  await page.mouse.move(x + deltaX, y, { steps: 5 })
+  await page.mouse.up()
+}
+
+test('desktop panes resize by pointer and keyboard and restore after reload', async ({ page, request, baseURL }, testInfo) => {
+  test.skip((page.viewportSize()?.width ?? 0) <= 930, 'desktop-only behavior')
+  const title = `三栏拖动-${testInfo.project.name}-${Date.now()}`
+  await createTask(request, baseURL!, title)
+  await page.goto('/')
+
+  const sidebar = page.locator('.sidebar')
+  const main = page.locator('main')
+  const sidebarSeparator = page.getByRole('separator', { name: '调整菜单栏宽度' })
+  await expect(sidebarSeparator).toBeVisible()
+  await expect(sidebarSeparator).toHaveAttribute('aria-valuenow', '236')
+
+  const sidebarBefore = await sidebar.boundingBox()
+  await dragSeparator(page, '调整菜单栏宽度', 64)
+  const sidebarDraggedWidth = Number(await sidebarSeparator.getAttribute('aria-valuenow'))
+  expect(sidebarDraggedWidth - sidebarBefore!.width).toBeGreaterThanOrEqual(63)
+  expect(sidebarDraggedWidth - sidebarBefore!.width).toBeLessThanOrEqual(65)
+  await expect(sidebar).toHaveCSS('width', `${sidebarDraggedWidth}px`)
+  const sidebarAfter = await sidebar.boundingBox()
+  expect((await main.boundingBox())!.x).toBeCloseTo(sidebarAfter!.x + sidebarAfter!.width, 0)
+
+  await sidebarSeparator.press('ArrowLeft')
+  const sidebarKeyboardWidth = sidebarDraggedWidth - 12
+  await expect(sidebarSeparator).toHaveAttribute('aria-valuenow', String(sidebarKeyboardWidth))
+  await expect(sidebar).toHaveCSS('width', `${sidebarKeyboardWidth}px`)
+
+  await sidebar.getByRole('button', { name: '收集箱', exact: true }).click()
+  const row = page.locator('.task-row').filter({ has: page.locator('strong', { hasText: title }) })
+  await expect(row).toHaveCount(1)
+  await row.locator('.task-main').click()
+
+  const detail = page.getByRole('dialog', { name: '任务详情' })
+  const detailSeparator = page.getByRole('separator', { name: '调整任务详情宽度' })
+  await expect(detailSeparator).toBeVisible()
+  const detailBefore = await detail.boundingBox()
+  await dragSeparator(page, '调整任务详情宽度', -70)
+  const detailAfter = await detail.boundingBox()
+  const expectedDetailWidth = Math.min(detailBefore!.width + 70, (page.viewportSize()?.width ?? 0) - sidebarKeyboardWidth - 330)
+  expect(detailAfter!.width).toBeCloseTo(expectedDetailWidth, 0)
+  const mainAfter = await main.boundingBox()
+  expect(mainAfter!.x + mainAfter!.width).toBeCloseTo(detailAfter!.x, 0)
+
+  const widths = await page.evaluate(() => ({
+    sidebar: localStorage.getItem('dodo.desktop-pane.sidebar'),
+    detail: localStorage.getItem('dodo.desktop-pane.detail'),
+  }))
+  expect(widths).toEqual({ sidebar: String(Math.round(sidebarKeyboardWidth)), detail: String(Math.round(detailAfter!.width)) })
+
+  await page.reload()
+  await expect(sidebar).toHaveCSS('width', `${Math.round(sidebarKeyboardWidth)}px`)
+  const restoredRow = page.locator('.task-row').filter({ has: page.locator('strong', { hasText: title }) })
+  await restoredRow.locator('.task-main').click()
+  await expect(detail).toHaveCSS('width', `${Math.round(detailAfter!.width)}px`)
+
+  await page.setViewportSize({ width: 930, height: 900 })
+  await expect(sidebarSeparator).toBeHidden()
+  await expect(detailSeparator).toBeHidden()
+})

frontend/e2e/task-detail-paper-flow.spec.ts

@@ -75,7 +75,7 @@ test('task detail paper flow keeps approved responsive geometry and material', a
   expect(Math.abs((footerBox.y + footerBox.height) - (detailBox.y + detailBox.height))).toBeLessThanOrEqual(2)
 
   if (viewport.width >= 931) {
-    expect(metrics.width).toBeCloseTo(350, 0)
+    expect(metrics.width).toBeCloseTo(Number(await page.getByRole('separator', { name: '调整任务详情宽度' }).getAttribute('aria-valuenow')), 0)
     const columns = await dateTime.locator('.task-detail-field').evaluateAll(elements => elements.map(element => element.getBoundingClientRect()))
     expect(columns[0].top).toBeCloseTo(columns[1].top, 0)
     expect(columns[1].left - columns[0].right).toBeCloseTo(10, 0)

frontend/src/App.vue

@@ -11,6 +11,7 @@ import { csrfHeader } from './lib/csrf'
 import { createCompletionPulse, shouldAnimateCompletionExit, waitForCompletionExit } from './lib/completion-motion'
 import { captureListDragPointer, getAdjacentListMove, hasExceededLongPressMovement, moveListToScope, snapshotListDragPointer, type ListDragPointer } from './lib/list-drag'
 import { deriveMemoShellState } from './lib/app-shell-state'
+import { clampDesktopPaneWidth, getDesktopPaneMax, readDesktopPaneWidth, writeDesktopPaneWidth, type DesktopPane } from './lib/desktop-shell-resize'
 import { positionArchivedMenu, resolveArchivedMenuFocusTarget } from './lib/archived-list-menu'
 import MvpPanel from './MvpPanel.vue'
 import CountdownPanel from './CountdownPanel.vue'
@@ -81,6 +82,18 @@ const loading = ref(false)
 const taskDueNowMs = useTaskDueClock()
 const mobileSidebar = ref(false)
 const sidebarCollapsed = ref(false)
+const SIDEBAR_WIDTH_STORAGE_KEY = 'dodo.desktop-pane.sidebar'
+const DETAIL_WIDTH_STORAGE_KEY = 'dodo.desktop-pane.detail'
+const desktopViewportWidth = ref(window.innerWidth)
+const sidebarWidth = ref(readDesktopPaneWidth(window.localStorage, SIDEBAR_WIDTH_STORAGE_KEY, 236))
+const detailWidth = ref(readDesktopPaneWidth(window.localStorage, DETAIL_WIDTH_STORAGE_KEY, 350))
+const resizingPane = ref<DesktopPane | null>(null)
+const sidebarMaxWidth = computed(() => getDesktopPaneMax('sidebar', desktopViewportWidth.value, selectedTask.value || habitDetailOpen.value ? detailWidth.value : 0))
+const detailMaxWidth = computed(() => getDesktopPaneMax('detail', desktopViewportWidth.value, sidebarCollapsed.value ? 0 : sidebarWidth.value))
+const detailSeparatorLabel = computed(() => habitDetailOpen.value && !selectedTask.value ? '调整习惯详情宽度' : '调整任务详情宽度')
+const shellStyle = computed(() => ({ '--sidebar-width': `${sidebarWidth.value}px`, '--detail-width': `${detailWidth.value}px` }))
+let paneResizePointerId: number | null = null
+let paneResizeCaptureTarget: HTMLElement | null = null
 const mobileDetail = ref(false)
 const moreSettingsOpen = ref(false)
 const markdownPreview = ref(false)
@@ -169,7 +182,7 @@ const memoPanel = ref<InstanceType<typeof MemoPanel> | null>(null)
 const memoTrash = ref(false)
 const memoDetailOpen = ref(false)
 const habitDetailOpen = ref(false)
-const compactLayout = ref(window.innerWidth <= 930)
+const compactLayout = ref(desktopViewportWidth.value <= 930)
 const memoShellState = computed(() => deriveMemoShellState({ view: activeView.value, detailOpen: memoDetailOpen.value, compact: compactLayout.value, trash: memoTrash.value }))
 const memoBackgroundInert = computed(() => memoShellState.value.backgroundInert)
 const showFloatingAdd = computed(() => memoShellState.value.showFab)
@@ -318,6 +331,44 @@ function toggleSidebar() {
     sidebarCollapsed.value = !sidebarCollapsed.value
   }
 }
+function stopPaneResize(event?: PointerEvent) {
+  if (!resizingPane.value || (event && paneResizePointerId !== null && event.pointerId !== paneResizePointerId)) return
+  const pane = resizingPane.value
+  const pointerId = paneResizePointerId
+  const captureTarget = paneResizeCaptureTarget
+  if (pane === 'sidebar') writeDesktopPaneWidth(window.localStorage, SIDEBAR_WIDTH_STORAGE_KEY, sidebarWidth.value)
+  else writeDesktopPaneWidth(window.localStorage, DETAIL_WIDTH_STORAGE_KEY, detailWidth.value)
+  resizingPane.value = null
+  paneResizePointerId = null
+  paneResizeCaptureTarget = null
+  if (captureTarget && pointerId !== null && captureTarget.hasPointerCapture?.(pointerId)) captureTarget.releasePointerCapture(pointerId)
+}
+function handlePaneLostPointerCapture(event: PointerEvent) {
+  if (event.pointerId === paneResizePointerId) stopPaneResize(event)
+}
+function movePaneResize(event: PointerEvent) {
+  if (!resizingPane.value || event.pointerId !== paneResizePointerId) return
+  if (event.buttons === 0) { stopPaneResize(); return }
+  const nextWidth = resizingPane.value === 'sidebar' ? event.clientX : window.innerWidth - event.clientX
+  if (resizingPane.value === 'sidebar') sidebarWidth.value = clampDesktopPaneWidth('sidebar', nextWidth, window.innerWidth, selectedTask.value || habitDetailOpen.value ? detailWidth.value : 0)
+  else detailWidth.value = clampDesktopPaneWidth('detail', nextWidth, window.innerWidth, sidebarCollapsed.value ? 0 : sidebarWidth.value)
+}
+function startPaneResize(pane: DesktopPane, event: PointerEvent) {
+  if (event.button !== 0 || compactLayout.value || (pane === 'detail' && !selectedTask.value && !habitDetailOpen.value)) return
+  event.preventDefault()
+  paneResizeCaptureTarget = event.currentTarget as HTMLElement
+  paneResizeCaptureTarget.setPointerCapture?.(event.pointerId)
+  resizingPane.value = pane
+  paneResizePointerId = event.pointerId
+}
+function resizePaneWithKeyboard(pane: DesktopPane, event: KeyboardEvent) {
+  if (!['ArrowLeft', 'ArrowRight'].includes(event.key)) return
+  event.preventDefault()
+  const direction = event.key === 'ArrowRight' ? 1 : -1
+  if (pane === 'sidebar') sidebarWidth.value = clampDesktopPaneWidth('sidebar', sidebarWidth.value + direction * 12, window.innerWidth, selectedTask.value || habitDetailOpen.value ? detailWidth.value : 0)
+  else detailWidth.value = clampDesktopPaneWidth('detail', detailWidth.value - direction * 12, window.innerWidth, sidebarCollapsed.value ? 0 : sidebarWidth.value)
+  writeDesktopPaneWidth(window.localStorage, pane === 'sidebar' ? SIDEBAR_WIDTH_STORAGE_KEY : DETAIL_WIDTH_STORAGE_KEY, pane === 'sidebar' ? sidebarWidth.value : detailWidth.value)
+}
 
 const appDialog = ref<{ show: (options: AppDialogOptions) => Promise<boolean | string | null> } | null>(null)
 async function confirmAction(title: string, description?: string, danger = false) {
@@ -1488,15 +1539,35 @@ function nextPage() {
   activeView.value === 'trash' ? loadTrash() : isTaskView(activeView.value) ? loadAll() : undefined
 }
 
+function reconcileDesktopPaneWidths() {
+  if (compactLayout.value) return
+  if (selectedTask.value || habitDetailOpen.value) {
+    detailWidth.value = clampDesktopPaneWidth('detail', detailWidth.value, desktopViewportWidth.value, sidebarCollapsed.value ? 0 : sidebarWidth.value)
+  }
+  sidebarWidth.value = clampDesktopPaneWidth('sidebar', sidebarWidth.value, desktopViewportWidth.value, selectedTask.value || habitDetailOpen.value ? detailWidth.value : 0)
+}
+
+watch([selectedTask, habitDetailOpen, sidebarCollapsed], reconcileDesktopPaneWidths)
+
+function handlePaneResizeBlur() { stopPaneResize() }
+
 function handleViewportResize() {
-  compactLayout.value = window.innerWidth <= 930
+  desktopViewportWidth.value = window.innerWidth
+  compactLayout.value = desktopViewportWidth.value <= 930
+  if (!compactLayout.value) reconcileDesktopPaneWidths()
+  else stopPaneResize()
   handleArchivedListViewportChange()
 }
 
 onMounted(() => {
+  handleViewportResize()
   document.addEventListener('pointerdown', handleArchivedListOutsidePointer)
   document.addEventListener('keydown', handleArchivedListEscape)
   window.addEventListener('resize', handleViewportResize)
+  window.addEventListener('pointermove', movePaneResize)
+  window.addEventListener('pointerup', stopPaneResize)
+  window.addEventListener('pointercancel', stopPaneResize)
+  window.addEventListener('blur', handlePaneResizeBlur)
   document.addEventListener('visibilitychange', handleTodayEnvironmentResume)
   window.addEventListener('focus', handleTodayEnvironmentResume)
   window.addEventListener('pageshow', handleTodayEnvironmentResume)
@@ -1507,6 +1578,10 @@ onUnmounted(() => {
   document.removeEventListener('pointerdown', handleArchivedListOutsidePointer)
   document.removeEventListener('keydown', handleArchivedListEscape)
   window.removeEventListener('resize', handleViewportResize)
+  window.removeEventListener('pointermove', movePaneResize)
+  window.removeEventListener('pointerup', stopPaneResize)
+  window.removeEventListener('pointercancel', stopPaneResize)
+  window.removeEventListener('blur', handlePaneResizeBlur)
   document.removeEventListener('visibilitychange', handleTodayEnvironmentResume)
   window.removeEventListener('focus', handleTodayEnvironmentResume)
   window.removeEventListener('pageshow', handleTodayEnvironmentResume)
@@ -1527,7 +1602,7 @@ onUnmounted(() => {
       <p v-if="initialized" class="auth-footnote">登录后继续你的清单</p>
     </form>
   </div>
-  <div v-else class="shell" :class="{ 'today-active': activeView==='today', 'sidebar-collapsed': sidebarCollapsed, 'detail-open': Boolean(selectedTask) || habitDetailOpen, 'memo-detail-open': activeView==='memos' && memoDetailOpen, 'mobile-sidebar-open': mobileSidebar }">
+  <div v-else class="shell" :class="{ 'today-active': activeView==='today', 'sidebar-collapsed': sidebarCollapsed, 'detail-open': Boolean(selectedTask) || habitDetailOpen, 'memo-detail-open': activeView==='memos' && memoDetailOpen, 'mobile-sidebar-open': mobileSidebar, 'pane-resizing': Boolean(resizingPane) }" :style="shellStyle">
     <div v-if="mobileSidebar || mobileDetail" class="scrim" @click="mobileSidebar=false;mobileDetail=false" />
     <aside class="sidebar" :inert="memoBackgroundInert ? true : undefined" :class="{ open: mobileSidebar }" @keydown.esc="sidebarCreateOpen=false;closeArchivedListAction();closeSidebarAction()">
       <div class="brand-row"><div class="brand small brand-lockup"><img class="brand-logo" src="/dodo-logo.svg" alt=""><span class="brand-wordmark">dodo</span></div><button class="icon mobile-only" aria-label="关闭菜单" @click="mobileSidebar=false"><X /></button></div>
@@ -1598,6 +1673,7 @@ onUnmounted(() => {
         </template>
       </AppSheet>
     </aside>
+    <div v-if="!sidebarCollapsed" class="pane-resizer pane-resizer--sidebar" role="separator" aria-label="调整菜单栏宽度" aria-orientation="vertical" aria-valuemin="190" :aria-valuemax="sidebarMaxWidth" :aria-valuenow="sidebarWidth" tabindex="0" @pointerdown="startPaneResize('sidebar',$event)" @lostpointercapture="handlePaneLostPointerCapture" @keydown="resizePaneWithKeyboard('sidebar',$event)" />
 
     <main :class="{'today-main':activeView==='today','list-main':activeView==='tasks'||activeView==='upcoming'||activeView==='habits'}">
       <header class="topbar" :class="{'settings-topbar':activeView==='settings'}" :inert="memoBackgroundInert ? true : undefined">
@@ -1656,6 +1732,7 @@ onUnmounted(() => {
       </div>
       </template>
     </main>
+    <div v-if="selectedTask || habitDetailOpen" class="pane-resizer pane-resizer--detail" role="separator" :aria-label="detailSeparatorLabel" aria-orientation="vertical" aria-valuemin="300" :aria-valuemax="detailMaxWidth" :aria-valuenow="detailWidth" tabindex="0" @pointerdown="startPaneResize('detail',$event)" @lostpointercapture="handlePaneLostPointerCapture" @keydown="resizePaneWithKeyboard('detail',$event)" />
 
     <AppSheet v-if="selectedTask" :open="true" :modal="compactLayout" variant="detail" panel-class="detail" title-id="task-detail-title" :close-on-scrim="compactLayout" :busy="taskDetailBusy" @close="closeTaskDetail" @submit.prevent="saveSelectedTaskChanges">
       <div class="detail-head"><span id="task-detail-title">任务详情</span><button class="icon" type="button" :disabled="taskDetailBusy" aria-label="关闭详情" @click="closeTaskDetail"><X/></button></div>

frontend/src/lib/desktop-shell-resize.test.ts

@@ -0,0 +1,33 @@
+import { describe, expect, it } from 'vitest'
+import { clampDesktopPaneWidth, getDesktopPaneMax, readDesktopPaneWidth, writeDesktopPaneWidth } from './desktop-shell-resize'
+
+describe('desktop shell resize', () => {
+  it('clamps the sidebar while preserving the center and detail panes', () => {
+    expect(clampDesktopPaneWidth('sidebar', 120, 1440, 350)).toBe(190)
+    expect(clampDesktopPaneWidth('sidebar', 500, 1440, 350)).toBe(360)
+    expect(clampDesktopPaneWidth('sidebar', 360, 931, 350)).toBe(251)
+  })
+
+  it('clamps the detail pane while preserving the center and sidebar panes', () => {
+    expect(clampDesktopPaneWidth('detail', 240, 1440, 236)).toBe(300)
+    expect(clampDesktopPaneWidth('detail', 600, 1440, 236)).toBe(520)
+    expect(clampDesktopPaneWidth('detail', 520, 931, 236)).toBe(365)
+  })
+
+  it('reports the effective maximum at narrow desktop widths', () => {
+    expect(getDesktopPaneMax('sidebar', 931, 350)).toBe(251)
+    expect(getDesktopPaneMax('detail', 931, 236)).toBe(365)
+    expect(getDesktopPaneMax('detail', 1440, 236)).toBe(520)
+  })
+
+  it('restores only finite persisted widths', () => {
+    const storage = { getItem: (key: string) => key.endsWith('sidebar') ? '288' : 'oops' }
+    expect(readDesktopPaneWidth(storage, 'dodo.desktop.sidebar', 236)).toBe(288)
+    expect(readDesktopPaneWidth(storage, 'dodo.desktop.detail', 350)).toBe(350)
+    expect(readDesktopPaneWidth({ getItem: () => { throw new Error('blocked') } }, 'key', 236)).toBe(236)
+  })
+
+  it('ignores storage write failures', () => {
+    expect(() => writeDesktopPaneWidth({ setItem: () => { throw new Error('blocked') } }, 'key', 300)).not.toThrow()
+  })
+})

frontend/src/lib/desktop-shell-resize.ts

@@ -0,0 +1,31 @@
+export type DesktopPane = 'sidebar' | 'detail'
+
+const SIDEBAR_MIN = 190
+const SIDEBAR_MAX = 360
+const DETAIL_MIN = 300
+const DETAIL_MAX = 520
+const CENTER_MIN = 330
+
+export function getDesktopPaneMax(pane: DesktopPane, viewportWidth: number, otherPaneWidth: number) {
+  const lower = pane === 'sidebar' ? SIDEBAR_MIN : DETAIL_MIN
+  const upper = pane === 'sidebar' ? SIDEBAR_MAX : DETAIL_MAX
+  return Math.round(Math.min(upper, Math.max(lower, viewportWidth - otherPaneWidth - CENTER_MIN)))
+}
+
+export function clampDesktopPaneWidth(pane: DesktopPane, width: number, viewportWidth: number, otherPaneWidth: number) {
+  const lower = pane === 'sidebar' ? SIDEBAR_MIN : DETAIL_MIN
+  return Math.round(Math.min(Math.max(width, lower), getDesktopPaneMax(pane, viewportWidth, otherPaneWidth)))
+}
+
+export function readDesktopPaneWidth(storage: Pick<Storage, 'getItem'>, key: string, fallback: number) {
+  try {
+    const value = Number(storage.getItem(key))
+    return Number.isFinite(value) && value > 0 ? value : fallback
+  } catch {
+    return fallback
+  }
+}
+
+export function writeDesktopPaneWidth(storage: Pick<Storage, 'setItem'>, key: string, width: number) {
+  try { storage.setItem(key, String(width)) } catch { /* storage can be unavailable */ }
+}

frontend/src/style.test.ts

@@ -389,8 +389,8 @@ describe('approved UI detail direction', () => {
   })
 
   it('matches the approved paper-flow geometry and material', () => {
-    expect(css).toContain('.shell.detail-open{grid-template-columns:236px minmax(430px,1fr) 350px}')
+    expect(css).toContain('.shell.detail-open{grid-template-columns:var(--sidebar-width,236px) minmax(330px,1fr) var(--detail-width,350px)}')
-    expect(css).toContain('@media(max-width:1050px) and (min-width:931px){.shell.detail-open{grid-template-columns:236px minmax(0,1fr) 350px}')
+    expect(css).toContain('@media(max-width:1050px) and (min-width:931px){main{padding-inline:24px}')
     expect(css).toContain('.detail{min-width:0;border-left:1px solid var(--line);background:#fffdf8;overflow:hidden;display:flex;flex-direction:column}')
     expect(css).toContain('.detail-head{height:58px;flex:0 0 58px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;')
     expect(css).toContain('.detail-form{min-width:0;border:0;margin:0;grid-template-columns:minmax(0,1fr);padding:18px;display:grid;gap:18px;overflow-y:auto;')
@@ -1467,6 +1467,15 @@ describe('unified floating add interaction', () => {
 describe('desktop task and habit detail disclosure', () => {
   it('gives the list the full remaining width until a task or habit is selected', () => {
     expect(app).toContain("'detail-open': Boolean(selectedTask) || habitDetailOpen")
+    expect(app).toContain(':style="shellStyle"')
+    expect(app).toContain('aria-label="调整菜单栏宽度"')
+    expect(app).toContain(':aria-label="detailSeparatorLabel"')
+    expect(app).toContain(':aria-valuemax="sidebarMaxWidth"')
+    expect(app).toContain(':aria-valuemax="detailMaxWidth"')
+    expect(app).toContain('@lostpointercapture="handlePaneLostPointerCapture"')
+    expect(app).toContain("@pointerdown=\"startPaneResize('sidebar',$event)\"")
+    expect(app).toContain("@pointerdown=\"startPaneResize('detail',$event)\"")
+    expect(app).toContain("@keydown=\"resizePaneWithKeyboard('sidebar',$event)\"")
     expect(app).toContain('<AppSheet v-if="selectedTask" :open="true" :modal="compactLayout"')
     expect(app).toContain('panel-class="detail"')
     expect(app).toContain(':compact-layout="compactLayout"')
@@ -1483,10 +1492,11 @@ describe('desktop task and habit detail disclosure', () => {
     expect(app).toContain('@click="closeTaskDetail"')
     expect(app).toContain('function closeTaskDetail()')
     expect(app).not.toContain('<div v-else class="paper">')
-    expect(css).toContain('.shell{height:100vh;display:grid;grid-template-columns:236px minmax(430px,1fr) 0;')
+    expect(css).toContain('.shell{height:100vh;display:grid;grid-template-columns:var(--sidebar-width,236px) minmax(330px,1fr) 0;')
-    expect(css).toContain('.shell.detail-open{grid-template-columns:236px minmax(430px,1fr) 350px}')
+    expect(css).toContain('.shell.detail-open{grid-template-columns:var(--sidebar-width,236px) minmax(330px,1fr) var(--detail-width,350px)}')
-    expect(css).toContain('.shell.sidebar-collapsed.detail-open{grid-template-columns:0 minmax(430px,1fr) 350px}')
+    expect(css).toContain('.shell.sidebar-collapsed.detail-open{grid-template-columns:0 minmax(330px,1fr) var(--detail-width,350px)}')
-    expect(css).toContain('@media(min-width:931px){.habit-detail-sheet{width:350px;height:100vh;max-height:none;border-radius:0;')
+    expect(css).toContain('.pane-resizer{position:relative;z-index:12;width:9px;')
+    expect(css).toContain('@media(min-width:931px){.habit-detail-sheet{width:var(--detail-width,350px);height:100vh;')
     expect(css).toContain('transition:grid-template-columns .22s ease')
   })
 })
@@ -1500,8 +1510,8 @@ describe('desktop sidebar collapse & folder scrollbar', () => {
   it('lets the top menu collapse the desktop sidebar', () => {
     expect(app).toContain('sidebar-collapsed')
     expect(app).toContain('toggleSidebar')
-    expect(css).toContain('.shell.sidebar-collapsed{grid-template-columns:0 minmax(430px,1fr) 0}')
+    expect(css).toContain('.shell.sidebar-collapsed{grid-template-columns:0 minmax(330px,1fr) 0}')
-    expect(css).toContain('.shell.sidebar-collapsed.detail-open{grid-template-columns:0 minmax(430px,1fr) 350px}')
+    expect(css).toContain('.shell.sidebar-collapsed.detail-open{grid-template-columns:0 minmax(330px,1fr) var(--detail-width,350px)}')
   })
 
   it('hides the folders scrollbar while staying scrollable', () => {
@@ -1575,13 +1585,13 @@ describe('sidebar information hierarchy', () => {
 
 describe('quiet index sidebar parity', () => {
   it('matches the approved desktop and mobile sidebar geometry and material', () => {
-    expect(css).toContain('.shell{height:100vh;display:grid;grid-template-columns:236px minmax(430px,1fr) 0;')
+    expect(css).toContain('.shell{height:100vh;display:grid;grid-template-columns:var(--sidebar-width,236px) minmax(330px,1fr) 0;')
-    expect(css).toContain('.shell.detail-open{grid-template-columns:236px minmax(430px,1fr) 350px}')
+    expect(css).toContain('.shell.detail-open{grid-template-columns:var(--sidebar-width,236px) minmax(330px,1fr) var(--detail-width,350px)}')
     expect(css).toContain('.sidebar{border-right:1px solid #e4d5c3;background:#f7efe3;')
     expect(css).toContain('.brand-row{height:68px;')
     expect(css).toContain('border-bottom:1px solid rgba(222,205,185,.75)')
     expect(css).toContain('.primary-nav{display:grid;padding:10px 11px 8px;gap:2px}')
-    expect(css).toContain('@media(max-width:1050px) and (min-width:931px){.shell.detail-open{grid-template-columns:236px minmax(0,1fr) 350px}')
+    expect(css).toContain('@media(max-width:1050px) and (min-width:931px){main{padding-inline:24px}')
     expect(css).not.toContain('grid-template-columns:220px')
     expect(css).toContain('@media(max-width:930px){.shell')
     expect(css).toContain('left:0;width:236px;max-width:86vw;')