feat(frontend): add swipe-to-select for admin tables

Squash of all swipe-select commits for clean rebase.

frontend/src/composables/useSwipeSelect.ts

 import { ref, onMounted, onUnmounted, type Ref } from 'vue'
 
+/**
+ * WeChat-style swipe/drag to select rows in a DataTable,
+ * with a semi-transparent marquee overlay showing the selection area.
+ *
+ * Features:
+ *  - Start dragging inside the current table-page layout's non-text area
+ *  - Mouse wheel scrolling continues selecting new rows
+ *  - Auto-scroll when dragging near viewport edges
+ *  - 5px drag threshold to avoid accidental selection on click
+ *
+ * Usage:
+ *   const containerRef = ref<HTMLElement | null>(null)
+ *   useSwipeSelect(containerRef, {
+ *     isSelected: (id) => selIds.value.includes(id),
+ *     select: (id) => { if (!selIds.value.includes(id)) selIds.value.push(id) },
+ *     deselect: (id) => { selIds.value = selIds.value.filter(x => x !== id) },
+ *   })
+ *
+ * Wrap <DataTable> with <div ref="containerRef">...</div>
+ * DataTable rows must have data-row-id attribute.
+ */
 export interface SwipeSelectAdapter {
   isSelected: (id: number) => boolean
   select: (id: number) => void
@@ -16,9 +37,22 @@ export function useSwipeSelect(
   let startRowIndex = -1
   let lastEndIndex = -1
   let startY = 0
+  let lastMouseY = 0
+  let pendingStartY = 0
   let initialSelectedSnapshot = new Map<number, boolean>()
   let cachedRows: HTMLElement[] = []
   let marqueeEl: HTMLDivElement | null = null
+  let cachedScrollParent: HTMLElement | null = null
+
+  const DRAG_THRESHOLD = 5
+  const SCROLL_ZONE = 60
+  const SCROLL_SPEED = 8
+
+  function getActivationRoot(): HTMLElement | null {
+    const container = containerRef.value
+    if (!container) return null
+    return container.closest('.table-page-layout') as HTMLElement | null || container
+  }
 
   function getDataRows(): HTMLElement[] {
     const container = containerRef.value
@@ -33,8 +67,40 @@ export function useSwipeSelect(
     return Number.isFinite(id) ? id : null
   }
 
+  /** Find the row index closest to a viewport Y coordinate (binary search). */
+  function findRowIndexAtY(clientY: number): number {
+    const len = cachedRows.length
+    if (len === 0) return -1
+
+    // Boundary checks
+    const firstRect = cachedRows[0].getBoundingClientRect()
+    if (clientY < firstRect.top) return 0
+    const lastRect = cachedRows[len - 1].getBoundingClientRect()
+    if (clientY > lastRect.bottom) return len - 1
+
+    // Binary search — rows are vertically ordered
+    let lo = 0, hi = len - 1
+    while (lo <= hi) {
+      const mid = (lo + hi) >>> 1
+      const rect = cachedRows[mid].getBoundingClientRect()
+      if (clientY < rect.top) hi = mid - 1
+      else if (clientY > rect.bottom) lo = mid + 1
+      else return mid
+    }
+    // In a gap between rows — pick the closer one
+    if (hi < 0) return 0
+    if (lo >= len) return len - 1
+    const rHi = cachedRows[hi].getBoundingClientRect()
+    const rLo = cachedRows[lo].getBoundingClientRect()
+    return (clientY - rHi.bottom < rLo.top - clientY) ? hi : lo
+  }
+
+  // --- Prevent text selection via selectstart (no body style mutation) ---
+  function onSelectStart(e: Event) { e.preventDefault() }
+
   // --- Marquee overlay ---
   function createMarquee() {
+    removeMarquee() // defensive: remove any stale marquee
     marqueeEl = document.createElement('div')
     const isDark = document.documentElement.classList.contains('dark')
     Object.assign(marqueeEl.style, {
@@ -44,7 +110,7 @@ export function useSwipeSelect(
       borderRadius: '4px',
       pointerEvents: 'none',
       zIndex: '9999',
-      transition: 'none'
+      transition: 'none',
     })
     document.body.appendChild(marqueeEl)
   }
@@ -52,11 +118,8 @@ export function useSwipeSelect(
   function updateMarquee(currentY: number) {
     if (!marqueeEl || !containerRef.value) return
     const containerRect = containerRef.value.getBoundingClientRect()
-
     const top = Math.min(startY, currentY)
     const bottom = Math.max(startY, currentY)
-
-    // Clamp to container horizontal bounds, extend full width
     marqueeEl.style.left = containerRect.left + 'px'
     marqueeEl.style.width = containerRect.width + 'px'
     marqueeEl.style.top = top + 'px'
@@ -64,140 +127,259 @@ export function useSwipeSelect(
   }
 
   function removeMarquee() {
-    if (marqueeEl) {
-      marqueeEl.remove()
-      marqueeEl = null
-    }
+    if (marqueeEl) { marqueeEl.remove(); marqueeEl = null }
   }
 
   // --- Row selection logic ---
   function applyRange(endIndex: number) {
+    if (startRowIndex < 0 || endIndex < 0) return
     const rangeMin = Math.min(startRowIndex, endIndex)
     const rangeMax = Math.max(startRowIndex, endIndex)
     const prevMin = lastEndIndex >= 0 ? Math.min(startRowIndex, lastEndIndex) : rangeMin
     const prevMax = lastEndIndex >= 0 ? Math.max(startRowIndex, lastEndIndex) : rangeMax
-
     const lo = Math.min(rangeMin, prevMin)
     const hi = Math.max(rangeMax, prevMax)
 
     for (let i = lo; i <= hi && i < cachedRows.length; i++) {
       const id = getRowId(cachedRows[i])
       if (id === null) continue
-
       if (i >= rangeMin && i <= rangeMax) {
-        if (dragMode === 'select') {
-          adapter.select(id)
-        } else {
-          adapter.deselect(id)
-        }
+        if (dragMode === 'select') adapter.select(id)
+        else adapter.deselect(id)
       } else {
         const wasSelected = initialSelectedSnapshot.get(id) ?? false
-        if (wasSelected) {
-          adapter.select(id)
-        } else {
-          adapter.deselect(id)
-        }
+        if (wasSelected) adapter.select(id)
+        else adapter.deselect(id)
       }
     }
-
     lastEndIndex = endIndex
   }
 
+  // --- Scrollable parent ---
+  function getScrollParent(el: HTMLElement): HTMLElement {
+    let parent = el.parentElement
+    while (parent && parent !== document.documentElement) {
+      const { overflow, overflowY } = getComputedStyle(parent)
+      if (/(auto|scroll)/.test(overflow + overflowY)) return parent
+      parent = parent.parentElement
+    }
+    return document.documentElement
+  }
+
+  // --- Scrollbar click detection ---
+  /** Check if click lands on a scrollbar of the target element or any ancestor. */
+  function isOnScrollbar(e: MouseEvent): boolean {
+    let el = e.target as HTMLElement | null
+    while (el && el !== document.documentElement) {
+      const hasVScroll = el.scrollHeight > el.clientHeight
+      const hasHScroll = el.scrollWidth > el.clientWidth
+      if (hasVScroll || hasHScroll) {
+        const rect = el.getBoundingClientRect()
+        // clientWidth/clientHeight exclude scrollbar; offsetWidth/offsetHeight include it
+        if (hasVScroll && e.clientX > rect.left + el.clientWidth) return true
+        if (hasHScroll && e.clientY > rect.top + el.clientHeight) return true
+      }
+      el = el.parentElement
+    }
+    // Document-level scrollbar
+    const docEl = document.documentElement
+    if (e.clientX >= docEl.clientWidth || e.clientY >= docEl.clientHeight) return true
+    return false
+  }
+
+  /**
+   * If the mousedown starts on inner cell content rather than cell padding,
+   * prefer the browser's native text selection so users can copy text normally.
+   */
+  function shouldPreferNativeTextSelection(target: HTMLElement): boolean {
+    const row = target.closest('tbody tr[data-row-id]')
+    if (!row) return false
+
+    const cell = target.closest('td, th')
+    if (!cell) return false
+
+    return target !== cell && !target.closest('[data-swipe-select-handle]')
+  }
+
+  function hasDirectTextContent(target: HTMLElement): boolean {
+    return Array.from(target.childNodes).some(
+      (node) => node.nodeType === Node.TEXT_NODE && (node.textContent?.trim().length ?? 0) > 0
+    )
+  }
+
+  function shouldPreferNativeSelectionOutsideRows(target: HTMLElement): boolean {
+    const activationRoot = getActivationRoot()
+    if (!activationRoot) return false
+    if (!activationRoot.contains(target)) return false
+    if (target.closest('tbody tr[data-row-id]')) return false
+
+    return hasDirectTextContent(target)
+  }
+
+  // =============================================
+  // Phase 1: detect drag threshold (5px movement)
+  // =============================================
   function onMouseDown(e: MouseEvent) {
     if (e.button !== 0) return
+    if (!containerRef.value) return
 
     const target = e.target as HTMLElement
-    if (target.closest('button, a, input, select, textarea, [role="button"], [role="menuitem"]')) return
-    if (!target.closest('tbody')) return
+    const activationRoot = getActivationRoot()
+    if (!activationRoot || !activationRoot.contains(target)) return
+
+    // Skip clicks on any scrollbar (inner containers + document)
+    if (isOnScrollbar(e)) return
+
+    if (target.closest('button, a, input, select, textarea, [role="button"], [role="menuitem"], [role="combobox"], [role="dialog"]')) return
+    if (shouldPreferNativeTextSelection(target)) return
+    if (shouldPreferNativeSelectionOutsideRows(target)) return
 
     cachedRows = getDataRows()
-    const tr = target.closest('tr[data-row-id]') as HTMLElement | null
-    if (!tr) return
-    const rowIndex = cachedRows.indexOf(tr)
-    if (rowIndex < 0) return
+    if (cachedRows.length === 0) return
+
+    pendingStartY = e.clientY
+    // Prevent text selection as soon as the mouse is down,
+    // before the drag threshold is reached (Phase 1).
+    // Without this, the browser starts selecting text during
+    // the 0–5px threshold movement window.
+    document.addEventListener('selectstart', onSelectStart)
+    document.addEventListener('mousemove', onThresholdMove)
+    document.addEventListener('mouseup', onThresholdUp)
+  }
+
+  function onThresholdMove(e: MouseEvent) {
+    if (Math.abs(e.clientY - pendingStartY) < DRAG_THRESHOLD) return
+    // Threshold exceeded — begin actual drag
+    document.removeEventListener('mousemove', onThresholdMove)
+    document.removeEventListener('mouseup', onThresholdUp)
+
+    beginDrag(pendingStartY)
 
-    const rowId = getRowId(tr)
-    if (rowId === null) return
+    // Process the move that crossed the threshold
+    lastMouseY = e.clientY
+    updateMarquee(e.clientY)
+    const rowIdx = findRowIndexAtY(e.clientY)
+    if (rowIdx >= 0) applyRange(rowIdx)
+    autoScroll(e)
+
+    document.addEventListener('mousemove', onMouseMove)
+    document.addEventListener('mouseup', onMouseUp)
+    document.addEventListener('wheel', onWheel, { passive: true })
+  }
+
+  function onThresholdUp() {
+    document.removeEventListener('mousemove', onThresholdMove)
+    document.removeEventListener('mouseup', onThresholdUp)
+    // Phase 1 ended without crossing threshold — remove selectstart blocker
+    document.removeEventListener('selectstart', onSelectStart)
+    cachedRows = []
+  }
+
+  // ============================
+  // Phase 2: actual drag session
+  // ============================
+  function beginDrag(clientY: number) {
+    startRowIndex = findRowIndexAtY(clientY)
+    const startRowId = startRowIndex >= 0 ? getRowId(cachedRows[startRowIndex]) : null
+    dragMode = (startRowId !== null && adapter.isSelected(startRowId)) ? 'deselect' : 'select'
 
     initialSelectedSnapshot = new Map()
     for (const row of cachedRows) {
       const id = getRowId(row)
-      if (id !== null) {
-        initialSelectedSnapshot.set(id, adapter.isSelected(id))
-      }
+      if (id !== null) initialSelectedSnapshot.set(id, adapter.isSelected(id))
     }
 
     isDragging.value = true
-    startRowIndex = rowIndex
+    startY = clientY
+    lastMouseY = clientY
     lastEndIndex = -1
-    startY = e.clientY
-    dragMode = adapter.isSelected(rowId) ? 'deselect' : 'select'
-
-    applyRange(rowIndex)
+    cachedScrollParent = cachedRows.length > 0
+      ? getScrollParent(cachedRows[0])
+      : (containerRef.value ? getScrollParent(containerRef.value) : null)
 
-    // Create visual marquee
     createMarquee()
-    updateMarquee(e.clientY)
-
-    e.preventDefault()
-    document.body.style.userSelect = 'none'
-    document.addEventListener('mousemove', onMouseMove)
-    document.addEventListener('mouseup', onMouseUp)
+    updateMarquee(clientY)
+    applyRange(startRowIndex)
+    // selectstart is already blocked since Phase 1 (onMouseDown).
+    // Clear any text selection that the browser may have started
+    // before our selectstart handler took effect.
+    window.getSelection()?.removeAllRanges()
   }
 
   function onMouseMove(e: MouseEvent) {
     if (!isDragging.value) return
-
-    // Update marquee box
+    lastMouseY = e.clientY
     updateMarquee(e.clientY)
-
-    const el = document.elementFromPoint(e.clientX, e.clientY) as HTMLElement | null
-    if (!el) return
-
-    const tr = el.closest('tr[data-row-id]') as HTMLElement | null
-    if (!tr) return
-    const rowIndex = cachedRows.indexOf(tr)
-    if (rowIndex < 0) return
-
-    applyRange(rowIndex)
+    const rowIdx = findRowIndexAtY(e.clientY)
+    if (rowIdx >= 0 && rowIdx !== lastEndIndex) applyRange(rowIdx)
     autoScroll(e)
   }
 
-  function onMouseUp() {
+  function onWheel() {
+    if (!isDragging.value) return
+    // After wheel scroll, rows shift in viewport — re-check selection
+    requestAnimationFrame(() => {
+      if (!isDragging.value) return // guard: drag may have ended before this frame
+      const rowIdx = findRowIndexAtY(lastMouseY)
+      if (rowIdx >= 0) applyRange(rowIdx)
+    })
+  }
+
+  function cleanupDrag() {
     isDragging.value = false
     startRowIndex = -1
     lastEndIndex = -1
     cachedRows = []
     initialSelectedSnapshot.clear()
+    cachedScrollParent = null
     stopAutoScroll()
     removeMarquee()
-    document.body.style.userSelect = ''
-
+    document.removeEventListener('selectstart', onSelectStart)
     document.removeEventListener('mousemove', onMouseMove)
     document.removeEventListener('mouseup', onMouseUp)
+    document.removeEventListener('wheel', onWheel)
+  }
+
+  function onMouseUp() {
+    cleanupDrag()
   }
 
-  // --- Auto-scroll ---
+  // Guard: clean up if mouse leaves window or window loses focus during drag
+  function onWindowBlur() {
+    if (isDragging.value) cleanupDrag()
+    // Also clean up threshold phase (Phase 1)
+    document.removeEventListener('mousemove', onThresholdMove)
+    document.removeEventListener('mouseup', onThresholdUp)
+    document.removeEventListener('selectstart', onSelectStart)
+  }
+
+  // --- Auto-scroll logic ---
   let scrollRAF = 0
-  const SCROLL_ZONE = 40
-  const SCROLL_SPEED = 8
 
   function autoScroll(e: MouseEvent) {
     cancelAnimationFrame(scrollRAF)
-    const container = containerRef.value
-    if (!container) return
+    const scrollEl = cachedScrollParent
+    if (!scrollEl) return
 
-    const rect = container.getBoundingClientRect()
     let dy = 0
-    if (e.clientY < rect.top + SCROLL_ZONE) {
-      dy = -SCROLL_SPEED
-    } else if (e.clientY > rect.bottom - SCROLL_ZONE) {
-      dy = SCROLL_SPEED
+    if (scrollEl === document.documentElement) {
+      if (e.clientY < SCROLL_ZONE) dy = -SCROLL_SPEED
+      else if (e.clientY > window.innerHeight - SCROLL_ZONE) dy = SCROLL_SPEED
+    } else {
+      const rect = scrollEl.getBoundingClientRect()
+      if (e.clientY < rect.top + SCROLL_ZONE) dy = -SCROLL_SPEED
+      else if (e.clientY > rect.bottom - SCROLL_ZONE) dy = SCROLL_SPEED
     }
 
     if (dy !== 0) {
       const step = () => {
-        container.scrollTop += dy
+        const prevScrollTop = scrollEl.scrollTop
+        scrollEl.scrollTop += dy
+        // Only re-check selection if scroll actually moved
+        if (scrollEl.scrollTop !== prevScrollTop) {
+          const rowIdx = findRowIndexAtY(lastMouseY)
+          if (rowIdx >= 0 && rowIdx !== lastEndIndex) applyRange(rowIdx)
+        }
         scrollRAF = requestAnimationFrame(step)
       }
       scrollRAF = requestAnimationFrame(step)
@@ -208,16 +390,20 @@ export function useSwipeSelect(
     cancelAnimationFrame(scrollRAF)
   }
 
+  // --- Lifecycle ---
   onMounted(() => {
-    containerRef.value?.addEventListener('mousedown', onMouseDown)
+    document.addEventListener('mousedown', onMouseDown)
+    window.addEventListener('blur', onWindowBlur)
   })
 
   onUnmounted(() => {
-    containerRef.value?.removeEventListener('mousedown', onMouseDown)
-    document.removeEventListener('mousemove', onMouseMove)
-    document.removeEventListener('mouseup', onMouseUp)
-    stopAutoScroll()
-    removeMarquee()
+    document.removeEventListener('mousedown', onMouseDown)
+    window.removeEventListener('blur', onWindowBlur)
+    // Clean up any in-progress drag state
+    document.removeEventListener('mousemove', onThresholdMove)
+    document.removeEventListener('mouseup', onThresholdUp)
+    document.removeEventListener('selectstart', onSelectStart)
+    cleanupDrag()
   })
 
   return { isDragging }

frontend/src/composables/useTableSelection.ts

+import { computed, ref, type Ref } from 'vue'
+
+interface UseTableSelectionOptions<T> {
+  rows: Ref<T[]>
+  getId: (row: T) => number
+}
+
+export function useTableSelection<T>({ rows, getId }: UseTableSelectionOptions<T>) {
+  const selectedSet = ref<Set<number>>(new Set())
+
+  const selectedIds = computed(() => Array.from(selectedSet.value))
+  const selectedCount = computed(() => selectedSet.value.size)
+
+  const isSelected = (id: number) => selectedSet.value.has(id)
+
+  const replaceSelectedSet = (next: Set<number>) => {
+    selectedSet.value = next
+  }
+
+  const setSelectedIds = (ids: number[]) => {
+    selectedSet.value = new Set(ids)
+  }
+
+  const select = (id: number) => {
+    if (selectedSet.value.has(id)) return
+    const next = new Set(selectedSet.value)
+    next.add(id)
+    replaceSelectedSet(next)
+  }
+
+  const deselect = (id: number) => {
+    if (!selectedSet.value.has(id)) return
+    const next = new Set(selectedSet.value)
+    next.delete(id)
+    replaceSelectedSet(next)
+  }
+
+  const toggle = (id: number) => {
+    if (selectedSet.value.has(id)) {
+      deselect(id)
+      return
+    }
+    select(id)
+  }
+
+  const clear = () => {
+    if (selectedSet.value.size === 0) return
+    replaceSelectedSet(new Set())
+  }
+
+  const removeMany = (ids: number[]) => {
+    if (ids.length === 0 || selectedSet.value.size === 0) return
+    const next = new Set(selectedSet.value)
+    let changed = false
+    ids.forEach((id) => {
+      if (next.delete(id)) changed = true
+    })
+    if (changed) replaceSelectedSet(next)
+  }
+
+  const allVisibleSelected = computed(() => {
+    if (rows.value.length === 0) return false
+    return rows.value.every((row) => selectedSet.value.has(getId(row)))
+  })
+
+  const toggleVisible = (checked: boolean) => {
+    const next = new Set(selectedSet.value)
+    rows.value.forEach((row) => {
+      const id = getId(row)
+      if (checked) {
+        next.add(id)
+      } else {
+        next.delete(id)
+      }
+    })
+    replaceSelectedSet(next)
+  }
+
+  const selectVisible = () => {
+    toggleVisible(true)
+  }
+
+  return {
+    selectedSet,
+    selectedIds,
+    selectedCount,
+    allVisibleSelected,
+    isSelected,
+    setSelectedIds,
+    select,
+    deselect,
+    toggle,
+    clear,
+    removeMany,
+    toggleVisible,
+    selectVisible
+  }
+}

frontend/src/style.css

@@ -57,6 +57,37 @@
   ::selection {
     @apply bg-primary-500/20 text-primary-900 dark:text-primary-100;
   }
+
+  /*
+   * 表格滚动容器：始终显示滚动条，不跟随全局悬停策略。
+   *
+   * 浏览器兼容性说明：
+   * - Chrome 121+ 原生支持 scrollbar-color / scrollbar-width。
+   *   一旦元素匹配了这两个标准属性，::-webkit-scrollbar-* 被完全忽略。
+   *   全局 * { scrollbar-width: thin } 使所有元素都走标准属性，
+   *   因此 Chrome 121+ 只看 scrollbar-color。
+   * - Chrome < 121 不认识标准属性，只看 ::-webkit-scrollbar-*，
+   *   所以保留 ::-webkit-scrollbar-thumb 作为回退。
+   * - Firefox 始终只看 scrollbar-color / scrollbar-width。
+   */
+  .table-wrapper {
+    scrollbar-width: auto;
+    scrollbar-color: rgba(156, 163, 175, 0.7) transparent;
+  }
+  .dark .table-wrapper {
+    scrollbar-color: rgba(75, 85, 99, 0.7) transparent;
+  }
+  /* 旧版 Chrome (< 121) 兼容回退 */
+  .table-wrapper::-webkit-scrollbar {
+    width: 10px;
+    height: 10px;
+  }
+  .table-wrapper::-webkit-scrollbar-thumb {
+    @apply rounded-full bg-gray-400/70;
+  }
+  .dark .table-wrapper::-webkit-scrollbar-thumb {
+    @apply rounded-full bg-gray-500/70;
+  }
 }
 
 @layer components {

frontend/src/views/admin/AccountsView.vue

@@ -131,8 +131,8 @@
         </div>
       </template>
       <template #table>
-        <AccountBulkActionsBar :selected-ids="selIds" @delete="handleBulkDelete" @edit="showBulkEdit = true" @clear="selIds = []" @select-page="selectPage" @toggle-schedulable="handleBulkToggleSchedulable" />
-        <div ref="accountTableRef">
+        <AccountBulkActionsBar :selected-ids="selIds" @delete="handleBulkDelete" @edit="showBulkEdit = true" @clear="clearSelection" @select-page="selectPage" @toggle-schedulable="handleBulkToggleSchedulable" />
+        <div ref="accountTableRef" class="flex min-h-0 flex-1 flex-col overflow-hidden">
         <DataTable
           :columns="cols"
           :data="accounts"
@@ -288,6 +288,7 @@ import { useAuthStore } from '@/stores/auth'
 import { adminAPI } from '@/api/admin'
 import { useTableLoader } from '@/composables/useTableLoader'
 import { useSwipeSelect } from '@/composables/useSwipeSelect'
+import { useTableSelection } from '@/composables/useTableSelection'
 import AppLayout from '@/components/layout/AppLayout.vue'
 import TablePageLayout from '@/components/layout/TablePageLayout.vue'
 import DataTable from '@/components/common/DataTable.vue'
@@ -322,17 +323,11 @@ const authStore = useAuthStore()
 
 const proxies = ref<Proxy[]>([])
 const groups = ref<AdminGroup[]>([])
-const selIds = ref<number[]>([])
 const accountTableRef = ref<HTMLElement | null>(null)
-useSwipeSelect(accountTableRef, {
-  isSelected: (id) => selIds.value.includes(id),
-  select: (id) => { if (!selIds.value.includes(id)) selIds.value.push(id) },
-  deselect: (id) => { selIds.value = selIds.value.filter(x => x !== id) }
-})
 const selPlatforms = computed<AccountPlatform[]>(() => {
   const platforms = new Set(
     accounts.value
-      .filter(a => selIds.value.includes(a.id))
+      .filter(a => isSelected(a.id))
       .map(a => a.platform)
   )
   return [...platforms]
@@ -340,7 +335,7 @@ const selPlatforms = computed<AccountPlatform[]>(() => {
 const selTypes = computed<AccountType[]>(() => {
   const types = new Set(
     accounts.value
-      .filter(a => selIds.value.includes(a.id))
+      .filter(a => isSelected(a.id))
       .map(a => a.type)
   )
   return [...types]
@@ -565,6 +560,29 @@ const {
   initialParams: { platform: '', type: '', status: '', group: '', search: '' }
 })
 
+const {
+  selectedIds: selIds,
+  allVisibleSelected,
+  isSelected,
+  setSelectedIds,
+  select,
+  deselect,
+  toggle: toggleSel,
+  clear: clearSelection,
+  removeMany: removeSelectedAccounts,
+  toggleVisible,
+  selectVisible: selectPage
+} = useTableSelection<Account>({
+  rows: accounts,
+  getId: (account) => account.id
+})
+
+useSwipeSelect(accountTableRef, {
+  isSelected,
+  select,
+  deselect
+})
+
 const resetAutoRefreshCache = () => {
   autoRefreshETag.value = null
 }
@@ -865,24 +883,11 @@ const openMenu = (a: Account, e: MouseEvent) => {
 
   menu.show = true
 }
-const toggleSel = (id: number) => { const i = selIds.value.indexOf(id); if(i === -1) selIds.value.push(id); else selIds.value.splice(i, 1) }
-const allVisibleSelected = computed(() => {
-  if (accounts.value.length === 0) return false
-  return accounts.value.every(account => selIds.value.includes(account.id))
-})
 const toggleSelectAllVisible = (event: Event) => {
   const target = event.target as HTMLInputElement
-  if (target.checked) {
-    const next = new Set(selIds.value)
-    accounts.value.forEach(account => next.add(account.id))
-    selIds.value = Array.from(next)
-    return
-  }
-  const visibleIds = new Set(accounts.value.map(account => account.id))
-  selIds.value = selIds.value.filter(id => !visibleIds.has(id))
+  toggleVisible(target.checked)
 }
-const selectPage = () => { selIds.value = [...new Set([...selIds.value, ...accounts.value.map(a => a.id)])] }
-const handleBulkDelete = async () => { if(!confirm(t('common.confirm'))) return; try { await Promise.all(selIds.value.map(id => adminAPI.accounts.delete(id))); selIds.value = []; reload() } catch (error) { console.error('Failed to bulk delete accounts:', error) } }
+const handleBulkDelete = async () => { if(!confirm(t('common.confirm'))) return; try { await Promise.all(selIds.value.map(id => adminAPI.accounts.delete(id))); clearSelection(); reload() } catch (error) { console.error('Failed to bulk delete accounts:', error) } }
 const updateSchedulableInList = (accountIds: number[], schedulable: boolean) => {
   if (accountIds.length === 0) return
   const idSet = new Set(accountIds)
@@ -955,7 +960,7 @@ const handleBulkToggleSchedulable = async (schedulable: boolean) => {
     const { successIds, failedIds, successCount, failedCount, hasIds, hasCounts } = normalizeBulkSchedulableResult(result, accountIds)
     if (!hasIds && !hasCounts) {
       appStore.showError(t('admin.accounts.bulkSchedulableResultUnknown'))
-      selIds.value = accountIds
+      setSelectedIds(accountIds)
       load().catch((error) => {
         console.error('Failed to refresh accounts:', error)
       })
@@ -975,16 +980,17 @@ const handleBulkToggleSchedulable = async (schedulable: boolean) => {
         ? t('admin.accounts.bulkSchedulablePartial', { success: successCount, failed: failedCount })
         : t('admin.accounts.bulkSchedulableResultUnknown')
       appStore.showError(message)
-      selIds.value = failedIds.length > 0 ? failedIds : accountIds
+      setSelectedIds(failedIds.length > 0 ? failedIds : accountIds)
     } else {
-      selIds.value = hasIds ? [] : accountIds
+      if (hasIds) clearSelection()
+      else setSelectedIds(accountIds)
     }
   } catch (error) {
     console.error('Failed to bulk toggle schedulable:', error)
     appStore.showError(t('common.error'))
   }
 }
-const handleBulkUpdated = () => { showBulkEdit.value = false; selIds.value = []; reload() }
+const handleBulkUpdated = () => { showBulkEdit.value = false; clearSelection(); reload() }
 const handleDataImported = () => { showImportData.value = false; reload() }
 const accountMatchesCurrentFilters = (account: Account) => {
   if (params.platform && account.platform !== params.platform) return false
@@ -1030,7 +1036,7 @@ const patchAccountInList = (updatedAccount: Account) => {
   if (!accountMatchesCurrentFilters(mergedAccount)) {
     accounts.value = accounts.value.filter(account => account.id !== mergedAccount.id)
     syncPaginationAfterLocalRemoval()
-    selIds.value = selIds.value.filter(id => id !== mergedAccount.id)
+    removeSelectedAccounts([mergedAccount.id])
     if (menu.acc?.id === mergedAccount.id) {
       menu.show = false
       menu.acc = null

frontend/src/views/admin/ProxiesView.vue

@@ -88,7 +88,7 @@
       </template>
 
       <template #table>
-        <div ref="proxyTableRef">
+        <div ref="proxyTableRef" class="flex min-h-0 flex-1 flex-col overflow-hidden">
         <DataTable :columns="columns" :data="proxies" :loading="loading">
           <template #header-select>
             <input
@@ -883,6 +883,7 @@ import Icon from '@/components/icons/Icon.vue'
 import PlatformTypeBadge from '@/components/common/PlatformTypeBadge.vue'
 import { useClipboard } from '@/composables/useClipboard'
 import { useSwipeSelect } from '@/composables/useSwipeSelect'
+import { useTableSelection } from '@/composables/useTableSelection'
 
 const { t } = useI18n()
 const appStore = useAppStore()
@@ -961,12 +962,25 @@ const testingProxyIds = ref<Set<number>>(new Set())
 const qualityCheckingProxyIds = ref<Set<number>>(new Set())
 const batchTesting = ref(false)
 const batchQualityChecking = ref(false)
-const selectedProxyIds = ref<Set<number>>(new Set())
 const proxyTableRef = ref<HTMLElement | null>(null)
+const {
+  selectedSet: selectedProxyIds,
+  selectedCount,
+  allVisibleSelected,
+  isSelected,
+  select,
+  deselect,
+  clear: clearSelectedProxies,
+  removeMany: removeSelectedProxies,
+  toggleVisible
+} = useTableSelection<Proxy>({
+  rows: proxies,
+  getId: (proxy) => proxy.id
+})
 useSwipeSelect(proxyTableRef, {
-  isSelected: (id) => selectedProxyIds.value.has(id),
-  select: (id) => { const next = new Set(selectedProxyIds.value); next.add(id); selectedProxyIds.value = next },
-  deselect: (id) => { const next = new Set(selectedProxyIds.value); next.delete(id); selectedProxyIds.value = next }
+  isSelected,
+  select,
+  deselect
 })
 const accountsProxy = ref<Proxy | null>(null)
 const proxyAccounts = ref<ProxyAccountSummary[]>([])
@@ -977,12 +991,6 @@ const showQualityReportDialog = ref(false)
 const qualityReportProxy = ref<Proxy | null>(null)
 const qualityReport = ref<ProxyQualityCheckResult | null>(null)
 
-const selectedCount = computed(() => selectedProxyIds.value.size)
-const allVisibleSelected = computed(() => {
-  if (proxies.value.length === 0) return false
-  return proxies.value.every((proxy) => selectedProxyIds.value.has(proxy.id))
-})
-
 // Batch import state
 const createMode = ref<'standard' | 'batch'>('standard')
 const batchInput = ref('')
@@ -1029,26 +1037,16 @@ const isAbortError = (error: unknown) => {
 
 const toggleSelectRow = (id: number, event: Event) => {
   const target = event.target as HTMLInputElement
-  const next = new Set(selectedProxyIds.value)
   if (target.checked) {
-    next.add(id)
-  } else {
-    next.delete(id)
+    select(id)
+    return
   }
-  selectedProxyIds.value = next
+  deselect(id)
 }
 
 const toggleSelectAllVisible = (event: Event) => {
   const target = event.target as HTMLInputElement
-  const next = new Set(selectedProxyIds.value)
-  for (const proxy of proxies.value) {
-    if (target.checked) {
-      next.add(proxy.id)
-    } else {
-      next.delete(proxy.id)
-    }
-  }
-  selectedProxyIds.value = next
+  toggleVisible(target.checked)
 }
 
 const loadProxies = async () => {
@@ -1740,11 +1738,7 @@ const confirmDelete = async () => {
     await adminAPI.proxies.delete(deletingProxy.value.id)
     appStore.showSuccess(t('admin.proxies.proxyDeleted'))
     showDeleteDialog.value = false
-    if (selectedProxyIds.value.has(deletingProxy.value.id)) {
-      const next = new Set(selectedProxyIds.value)
-      next.delete(deletingProxy.value.id)
-      selectedProxyIds.value = next
-    }
+    removeSelectedProxies([deletingProxy.value.id])
     deletingProxy.value = null
     loadProxies()
   } catch (error: any) {
@@ -1771,7 +1765,7 @@ const confirmBatchDelete = async () => {
       appStore.showInfo(t('admin.proxies.batchDeleteSkipped', { skipped }))
     }
 
-    selectedProxyIds.value = new Set()
+    clearSelectedProxies()
     showBatchDeleteDialog.value = false
     loadProxies()
   } catch (error: any) {