fix(web/channel): stabilize inline priority updates (#6415)

* fix(channel): debounce inline priority updates

* fix(channel): commit spinner edits only on Enter or focus leave

Blurring the inline edit input to the +/- buttons flushed the pending
priority update immediately, bypassing the container focus-containment
check and defeating the debounce. Commit now happens via the container
blur handler or explicitly on Enter. Add unit tests for the priority
update scheduler.

* fix(channel): preserve row identity when priority updates reorder channels

web/src/features/channels/components/channels-columns.tsx

@@ -27,7 +27,7 @@ import {
   Shuffle,
   Shuffle,
   SlidersHorizontal,
   SlidersHorizontal,
 } from 'lucide-react'
 } from 'lucide-react'
-import { useState, useMemo, useContext } from 'react'
+import { useState, useMemo, useContext, useEffect } from 'react'
 import { useTranslation } from 'react-i18next'
 import { useTranslation } from 'react-i18next'
 import { toast } from 'sonner'
 import { toast } from 'sonner'
 
 
@@ -71,6 +71,7 @@ import {
   handleUpdateChannelField,
   handleUpdateChannelField,
   handleUpdateTagField,
   handleUpdateTagField,
   handleUpdateChannelBalance,
   handleUpdateChannelBalance,
+  createChannelPriorityUpdateScheduler,
   isTagAggregateRow,
   isTagAggregateRow,
   type TagRow,
   type TagRow,
 } from '../lib'
 } from '../lib'
@@ -172,15 +173,19 @@ function UpstreamUpdateTags({ channel }: { channel: Channel }) {
  * Priority cell component with inline editing
  * Priority cell component with inline editing
  */
  */
 function PriorityCell({ channel }: { channel: Channel }) {
 function PriorityCell({ channel }: { channel: Channel }) {
+  if (isTagAggregateRow(channel)) {
+    return <TagPriorityCell channel={channel} />
+  }
+
+  return <ChannelPriorityCell channel={channel} />
+}
+
+function TagPriorityCell({ channel }: { channel: TagRow }) {
   const { t } = useTranslation()
   const { t } = useTranslation()
   const queryClient = useQueryClient()
   const queryClient = useQueryClient()
-  const isTagRow = isTagAggregateRow(channel)
   const priority = channel.priority
   const priority = channel.priority
   const [confirmOpen, setConfirmOpen] = useState(false)
   const [confirmOpen, setConfirmOpen] = useState(false)
   const [pendingValue, setPendingValue] = useState<number | null>(null)
   const [pendingValue, setPendingValue] = useState<number | null>(null)
-
-  // Tag row - editable with confirmation for all tag channels
-  if (isTagRow) {
   const tag = channel.tag || ''
   const tag = channel.tag || ''
   const channelCount = channel.children?.length || 0
   const channelCount = channel.children?.length || 0
 
 
@@ -212,15 +217,33 @@ function PriorityCell({ channel }: { channel: Channel }) {
       />
       />
     </>
     </>
   )
   )
-  }
+}
+
+function ChannelPriorityCell({ channel }: { channel: Channel }) {
+  const queryClient = useQueryClient()
+  const priorityUpdateScheduler = useMemo(
+    () =>
+      createChannelPriorityUpdateScheduler((value) => {
+        void handleUpdateChannelField(
+          channel.id,
+          'priority',
+          value,
+          queryClient
+        )
+      }),
+    [channel.id, queryClient]
+  )
+
+  useEffect(
+    () => () => priorityUpdateScheduler.flush(),
+    [priorityUpdateScheduler]
+  )
 
 
-  // Regular channel row - editable
   return (
   return (
     <NumericSpinnerInput
     <NumericSpinnerInput
-      value={priority ?? 0}
-      onChange={(value) => {
-        handleUpdateChannelField(channel.id, 'priority', value, queryClient)
-      }}
+      value={channel.priority ?? 0}
+      onChange={priorityUpdateScheduler.schedule}
+      onCommit={priorityUpdateScheduler.flush}
       min={-999}
       min={-999}
     />
     />
   )
   )

web/src/features/channels/components/channels-table.tsx

@@ -55,6 +55,7 @@ import {
 import {
 import {
   channelsQueryKeys,
   channelsQueryKeys,
   aggregateChannelsByTag,
   aggregateChannelsByTag,
+  getChannelTableRowId,
   isTagAggregateRow,
   isTagAggregateRow,
   getChannelTypeIcon,
   getChannelTypeIcon,
   getChannelTypeLabel,
   getChannelTypeLabel,
@@ -330,6 +331,7 @@ export function ChannelsTable() {
     onColumnFiltersChange: handleColumnFiltersChange,
     onColumnFiltersChange: handleColumnFiltersChange,
     onPaginationChange,
     onPaginationChange,
     onGlobalFilterChange,
     onGlobalFilterChange,
+    getRowId: getChannelTableRowId,
     getSubRows: (row: Channel & { children?: Channel[] }) => row.children,
     getSubRows: (row: Channel & { children?: Channel[] }) => row.children,
     manualPagination: true,
     manualPagination: true,
     manualSorting: true,
     manualSorting: true,

web/src/features/channels/components/numeric-spinner-input.tsx

@@ -25,6 +25,7 @@ import { cn } from '@/lib/utils'
 interface NumericSpinnerInputProps {
 interface NumericSpinnerInputProps {
   value: number | null | undefined
   value: number | null | undefined
   onChange: (value: number) => void
   onChange: (value: number) => void
+  onCommit?: () => void
   min?: number
   min?: number
   max?: number
   max?: number
   step?: number
   step?: number
@@ -36,6 +37,7 @@ interface NumericSpinnerInputProps {
 export function NumericSpinnerInput({
 export function NumericSpinnerInput({
   value,
   value,
   onChange,
   onChange,
+  onCommit,
   min = 0,
   min = 0,
   max,
   max,
   step = 1,
   step = 1,
@@ -96,7 +98,7 @@ export function NumericSpinnerInput({
   const commitValue = () => {
   const commitValue = () => {
     setEditing(false)
     setEditing(false)
     const num = Number(localValue)
     const num = Number(localValue)
-    if (isNaN(num) || localValue === '' || localValue === '-') {
+    if (Number.isNaN(num) || localValue === '' || localValue === '-') {
       setLocalValue(String(value ?? 0))
       setLocalValue(String(value ?? 0))
       return
       return
     }
     }
@@ -107,10 +109,21 @@ export function NumericSpinnerInput({
     }
     }
   }
   }
 
 
+  const handleControlBlur = (e: React.FocusEvent<HTMLDivElement>) => {
+    if (
+      e.relatedTarget instanceof Node &&
+      e.currentTarget.contains(e.relatedTarget)
+    ) {
+      return
+    }
+    onCommit?.()
+  }
+
   const handleKeyDown = (e: React.KeyboardEvent) => {
   const handleKeyDown = (e: React.KeyboardEvent) => {
     if (e.key === 'Enter') {
     if (e.key === 'Enter') {
       e.preventDefault()
       e.preventDefault()
       commitValue()
       commitValue()
+      onCommit?.()
     } else if (e.key === 'Escape') {
     } else if (e.key === 'Escape') {
       setEditing(false)
       setEditing(false)
       setLocalValue(String(value ?? 0))
       setLocalValue(String(value ?? 0))
@@ -126,6 +139,7 @@ export function NumericSpinnerInput({
         <Label className='text-muted-foreground mr-1.5 text-xs'>{label}</Label>
         <Label className='text-muted-foreground mr-1.5 text-xs'>{label}</Label>
       )}
       )}
       <div
       <div
+        onBlur={handleControlBlur}
         className={cn(
         className={cn(
           'group/spinner border-input inline-flex h-7 items-center gap-0 rounded-md border transition-colors',
           'group/spinner border-input inline-flex h-7 items-center gap-0 rounded-md border transition-colors',
           !disabled && 'hover:bg-muted/60',
           !disabled && 'hover:bg-muted/60',

web/src/features/channels/lib/__tests__/channel-table-row-id.test.ts

+/*
+Copyright (C) 2023-2026 QuantumNous
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+For commercial licensing, please contact support@quantumnous.com
+*/
+import assert from 'node:assert/strict'
+import { describe, test } from 'node:test'
+
+import type { Channel } from '../../types'
+import { getChannelTableRowId, type TagRow } from '../channel-utils'
+
+function channel(id: number): Channel {
+  return { id } as Channel
+}
+
+describe('channel table row identity', () => {
+  test('keeps each channel identity when priority updates reorder the rows', () => {
+    const first = channel(101)
+    const updated = channel(202)
+    const third = channel(303)
+
+    const beforeUpdate = [first, updated, third].map(getChannelTableRowId)
+    const afterUpdate = [updated, first, third].map(getChannelTableRowId)
+
+    assert.deepEqual(beforeUpdate, [
+      'channel:101',
+      'channel:202',
+      'channel:303',
+    ])
+    assert.deepEqual(afterUpdate, ['channel:202', 'channel:101', 'channel:303'])
+  })
+
+  test('uses separate namespaces for tag and channel rows', () => {
+    const tagRow = {
+      id: '202' as unknown as number,
+      tag: '202',
+      children: [channel(202)],
+    } as TagRow
+
+    assert.equal(getChannelTableRowId(tagRow), 'tag:202')
+    assert.equal(getChannelTableRowId(channel(202)), 'channel:202')
+  })
+})

web/src/features/channels/lib/channel-priority-update.test.ts

+/*
+Copyright (C) 2023-2026 QuantumNous
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+For commercial licensing, please contact support@quantumnous.com
+*/
+import assert from 'node:assert/strict'
+import { describe, test } from 'node:test'
+
+import {
+  CHANNEL_PRIORITY_UPDATE_DELAY_MS,
+  createChannelPriorityUpdateScheduler,
+} from './channel-priority-update'
+
+function createFakeTimers() {
+  const pending = new Map<number, () => void>()
+  let nextId = 1
+
+  return {
+    timers: {
+      setTimeout: (callback: () => void, delay: number) => {
+        assert.equal(delay, CHANNEL_PRIORITY_UPDATE_DELAY_MS)
+        const id = nextId++
+        pending.set(id, callback)
+        return id
+      },
+      clearTimeout: (id: number) => {
+        pending.delete(id)
+      },
+    },
+    fireAll() {
+      const callbacks = [...pending.values()]
+      pending.clear()
+      for (const callback of callbacks) callback()
+    },
+    get pendingCount() {
+      return pending.size
+    },
+  }
+}
+
+describe('channel priority update scheduler', () => {
+  test('coalesces rapid schedules into one update with the latest value', () => {
+    const fake = createFakeTimers()
+    const updates: number[] = []
+    const scheduler = createChannelPriorityUpdateScheduler(
+      (value) => updates.push(value),
+      fake.timers
+    )
+
+    scheduler.schedule(1)
+    scheduler.schedule(2)
+    scheduler.schedule(3)
+    assert.deepEqual(updates, [])
+    assert.equal(fake.pendingCount, 1)
+
+    fake.fireAll()
+    assert.deepEqual(updates, [3])
+  })
+
+  test('flush commits the pending value immediately and cancels the timer', () => {
+    const fake = createFakeTimers()
+    const updates: number[] = []
+    const scheduler = createChannelPriorityUpdateScheduler(
+      (value) => updates.push(value),
+      fake.timers
+    )
+
+    scheduler.schedule(7)
+    scheduler.flush()
+    assert.deepEqual(updates, [7])
+    assert.equal(fake.pendingCount, 0)
+
+    fake.fireAll()
+    assert.deepEqual(updates, [7])
+  })
+
+  test('flush without a pending value does nothing', () => {
+    const fake = createFakeTimers()
+    const updates: number[] = []
+    const scheduler = createChannelPriorityUpdateScheduler(
+      (value) => updates.push(value),
+      fake.timers
+    )
+
+    scheduler.flush()
+    scheduler.schedule(5)
+    scheduler.flush()
+    scheduler.flush()
+    assert.deepEqual(updates, [5])
+  })
+
+  test('preserves a pending value of 0', () => {
+    const fake = createFakeTimers()
+    const updates: number[] = []
+    const scheduler = createChannelPriorityUpdateScheduler(
+      (value) => updates.push(value),
+      fake.timers
+    )
+
+    scheduler.schedule(0)
+    scheduler.flush()
+    assert.deepEqual(updates, [0])
+  })
+})

web/src/features/channels/lib/channel-priority-update.ts

+/*
+Copyright (C) 2023-2026 QuantumNous
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+For commercial licensing, please contact support@quantumnous.com
+*/
+
+export const CHANNEL_PRIORITY_UPDATE_DELAY_MS = 800
+
+interface ChannelPriorityUpdateTimers {
+  setTimeout: (callback: () => void, delay: number) => number
+  clearTimeout: (id: number) => void
+}
+
+const browserTimers: ChannelPriorityUpdateTimers = {
+  setTimeout: (callback, delay) => window.setTimeout(callback, delay),
+  clearTimeout: (id) => window.clearTimeout(id),
+}
+
+export function createChannelPriorityUpdateScheduler(
+  onUpdate: (value: number) => void,
+  timers: ChannelPriorityUpdateTimers = browserTimers
+) {
+  let timeoutId: number | undefined
+  let pendingValue: number | undefined
+
+  const clearPendingTimer = () => {
+    if (timeoutId === undefined) return
+    timers.clearTimeout(timeoutId)
+    timeoutId = undefined
+  }
+
+  const commitPendingValue = () => {
+    clearPendingTimer()
+    if (pendingValue === undefined) return
+
+    const value = pendingValue
+    pendingValue = undefined
+    onUpdate(value)
+  }
+
+  return {
+    schedule(value: number) {
+      clearPendingTimer()
+      pendingValue = value
+      timeoutId = timers.setTimeout(
+        commitPendingValue,
+        CHANNEL_PRIORITY_UPDATE_DELAY_MS
+      )
+    },
+    flush: commitPendingValue,
+  }
+}

web/src/features/channels/lib/channel-utils.ts

@@ -616,6 +616,14 @@ export function isTagAggregateRow(row: Channel | TagRow): row is TagRow {
   return Array.isArray((row as TagRow).children)
   return Array.isArray((row as TagRow).children)
 }
 }
 
 
+export function getChannelTableRowId(row: Channel | TagRow): string {
+  if (isTagAggregateRow(row)) {
+    return `tag:${row.tag || ''}`
+  }
+
+  return `channel:${row.id}`
+}
+
 /**
 /**
  * Aggregate channels by tag for tag mode display
  * Aggregate channels by tag for tag mode display
  * Converts flat array into tree structure grouped by tag
  * Converts flat array into tree structure grouped by tag

web/src/features/channels/lib/index.ts

@@ -18,6 +18,7 @@ For commercial licensing, please contact support@quantumnous.com
 */
 */
 // Re-export all library functions
 // Re-export all library functions
 export * from './channel-actions'
 export * from './channel-actions'
+export * from './channel-priority-update'
 export * from './advanced-custom'
 export * from './advanced-custom'
 export * from './channel-form-errors'
 export * from './channel-form-errors'
 export * from './channel-form'
 export * from './channel-form'