diff --git a/web/app/components/workflow/panel/comments-panel/index.tsx b/web/app/components/workflow/panel/comments-panel/index.tsx
index 64a2f39792..4154b772cd 100644
--- a/web/app/components/workflow/panel/comments-panel/index.tsx
+++ b/web/app/components/workflow/panel/comments-panel/index.tsx
@@ -1,19 +1,27 @@
-import { memo, useCallback, useMemo } from 'react'
+import { memo, useCallback, useMemo, useState } from 'react'
 import { useReactFlow } from 'reactflow'
-import { RiCloseLine } from '@remixicon/react'
+import { RiCheckboxCircleFill, RiCheckboxCircleLine, RiCloseLine } from '@remixicon/react'
 import { useStore } from '@/app/components/workflow/store'
 import type { WorkflowCommentList } from '@/service/workflow-comment'
 import { useWorkflowComment } from '@/app/components/workflow/hooks/use-workflow-comment'
 import Avatar from '@/app/components/base/avatar'
 import cn from '@/utils/classnames'
 import { ControlMode } from '@/app/components/workflow/types'
+import { resolveWorkflowComment } from '@/service/workflow-comment'
+import { useParams } from 'next/navigation'
+import { useFormatTimeFromNow } from '@/app/components/workflow/hooks'
 
 const CommentsPanel = () => {
   const activeCommentId = useStore(s => s.activeCommentId)
   const setActiveCommentId = useStore(s => s.setActiveCommentId)
   const setControlMode = useStore(s => s.setControlMode)
-  const { comments, loading } = useWorkflowComment()
+  const { comments, loading, loadComments } = useWorkflowComment()
   const reactFlow = useReactFlow()
+  const params = useParams()
+  const appId = params.appId as string
+  const { formatTimeFromNow } = useFormatTimeFromNow()
+
+  const [filter, setFilter] = useState<'all' | 'unresolved'>('all')
 
   const handleSelect = useCallback((comment: WorkflowCommentList) => {
     // center viewport on the comment position and activate it
@@ -21,15 +29,44 @@ const CommentsPanel = () => {
     setActiveCommentId(comment.id)
   }, [reactFlow, setActiveCommentId])
 
-  const sorted = useMemo(() => {
-    return [...comments].sort((a, b) => new Date(b.updated_at).getTime() - new Date(a.updated_at).getTime())
-  }, [comments])
+  const filteredSorted = useMemo(() => {
+    let data = comments
+    if (filter === 'unresolved')
+      data = data.filter(c => !c.resolved)
+    return data
+  }, [comments, filter])
+
+  const handleResolve = useCallback(async (comment: WorkflowCommentList) => {
+    if (comment.resolved) return
+    if (!appId) return
+    try {
+      await resolveWorkflowComment(appId, comment.id)
+      await loadComments()
+      setActiveCommentId(comment.id)
+    }
+    catch (e) {
+      console.error('Resolve comment failed', e)
+    }
+  }, [appId, loadComments, setActiveCommentId])
 
   return (
     <div className={cn('relative flex h-full w-[420px] flex-col rounded-l-2xl border border-components-panel-border bg-components-panel-bg-alt')}>
-      <div className='system-xl-semibold flex shrink-0 items-center justify-between p-4 pb-2 text-text-primary'>
-        Comments
-        <div className='flex items-center'>
+      <div className='flex items-center justify-between p-4 pb-2'>
+        <div className='system-xl-semibold text-text-primary'>Comments</div>
+        <div className='flex items-center gap-2'>
+          <div
+            className={cn('inline-flex rounded-md bg-components-panel-on-panel-item-bg px-1 py-1')}
+            role='group'
+          >
+            <button
+              className={cn('system-xs-medium rounded px-2 py-1', filter === 'all' ? 'bg-white text-text-primary' : 'text-text-tertiary hover:text-text-secondary')}
+              onClick={() => setFilter('all')}
+            >All</button>
+            <button
+              className={cn('system-xs-medium rounded px-2 py-1', filter === 'unresolved' ? 'bg-white text-text-primary' : 'text-text-tertiary hover:text-text-secondary')}
+              onClick={() => setFilter('unresolved')}
+            >Unresolved</button>
+          </div>
           <div
             className='flex h-6 w-6 cursor-pointer items-center justify-center'
             onClick={() => {
@@ -41,43 +78,89 @@ const CommentsPanel = () => {
           </div>
         </div>
       </div>
-      <div className='system-sm-regular shrink-0 px-4 pb-2 text-text-tertiary'>
-        {loading ? 'Loading…' : `${sorted.length} comment${sorted.length === 1 ? '' : 's'}`}
-      </div>
       <div className='grow overflow-y-auto px-3 pb-4'>
-        {sorted.map((c) => {
+        {filteredSorted.map((c) => {
           const isActive = activeCommentId === c.id
           return (
             <div
               key={c.id}
-              className={cn(
-                'group mb-2 cursor-pointer rounded-xl border border-components-panel-border bg-components-panel-bg p-3 transition-colors hover:bg-components-panel-on-panel-item-bg-hover',
-                isActive && 'ring-1 ring-primary-500',
-              )}
+              className={cn('group mb-2 cursor-pointer rounded-xl border border-components-panel-border bg-components-panel-bg p-3 transition-colors hover:bg-components-panel-on-panel-item-bg-hover', isActive && 'ring-1 ring-primary-500')}
               onClick={() => handleSelect(c)}
             >
-              <div className='flex items-start gap-2'>
-                <Avatar
-                  avatar={c.created_by_account.avatar_url || null}
-                  name={c.created_by_account.name}
-                  size={28}
-                  className='shrink-0'
-                />
-                <div className='min-w-0 flex-1'>
-                  <div className='flex items-center gap-2'>
+              <div className='min-w-0'>
+                {/* Participants stacked avatars above creator name */}
+                {(() => {
+                  const creator = {
+                    id: c.created_by,
+                    name: c.created_by_account?.name || 'User',
+                    avatar_url: c.created_by_account?.avatar_url || null,
+                  }
+                  const collaborators = (c.participants || []).filter(p => p.id !== creator.id)
+                  const all = [creator, ...collaborators]
+                  if (!all.length) return null
+                  const shouldShowCount = all.length >= 4
+                  const maxVisible = shouldShowCount ? 2 : 3
+                  const visibleUsers = all.slice(0, maxVisible)
+                  const remainingCount = all.length - maxVisible
+                  return (
+                    <div className='mb-1 flex items-center -space-x-1'>
+                      {visibleUsers.map((p, index) => (
+                        <div
+                          key={`${p.id}-${index}`}
+                          className='relative'
+                          style={{ zIndex: visibleUsers.length - index }}
+                        >
+                          <Avatar
+                            name={p.name}
+                            avatar={p.avatar_url || null}
+                            size={18}
+                            className='ring-2 ring-white'
+                          />
+                        </div>
+                      ))}
+                      {remainingCount > 0 && (
+                        <div
+                          className='flex h-[18px] w-[18px] items-center justify-center rounded-full bg-components-panel-on-panel-item-bg text-[10px] leading-none text-text-secondary ring-2 ring-white'
+                          style={{ zIndex: 0 }}
+                        >
+                          +{remainingCount}
+                        </div>
+                      )}
+                    </div>
+                  )
+                })()}
+                {/* Header row: creator + time + right-top status/action icons */}
+                <div className='flex items-start justify-between'>
+                  <div className='flex min-w-0 items-center gap-2'>
                     <div className='system-sm-medium truncate text-text-primary'>{c.created_by_account.name}</div>
-                    {c.resolved && <span className='system-2xs-medium rounded-md bg-util-colors-green-green-100 px-1 py-0.5 text-util-colors-green-green-700'>Resolved</span>}
+                    <div className='system-2xs-regular shrink-0 text-text-tertiary'>
+                      {formatTimeFromNow(c.updated_at * 1000)}
+                    </div>
                   </div>
-                  <div className='system-sm-regular mt-0.5 line-clamp-3 break-words text-text-secondary'>{c.content}</div>
-                  <div className='system-2xs-regular mt-1 text-text-tertiary'>
-                    {c.reply_count} replies • {c.mention_count} mentions
+                  <div className='flex items-center gap-1'>
+                    {c.resolved ? (
+                      <RiCheckboxCircleFill className='h-4 w-4'/>
+                    ) : (
+                      <RiCheckboxCircleLine
+                        className='h-4 w-4 cursor-pointer text-text-tertiary hover:text-text-secondary'
+                        onClick={() => { handleResolve(c) }}
+                      />
+                    )}
+                  </div>
+                </div>
+                {/* Content */}
+                <div className='system-sm-regular mt-1 line-clamp-3 break-words text-text-secondary'>{c.content}</div>
+                {/* Footer */}
+                <div className='mt-2 flex items-center justify-between'>
+                  <div className='system-2xs-regular text-text-tertiary'>
+                    {c.reply_count} replies
                   </div>
                 </div>
               </div>
             </div>
           )
         })}
-        {!loading && sorted.length === 0 && (
+        {!loading && filteredSorted.length === 0 && (
           <div className='system-sm-regular mt-6 text-center text-text-tertiary'>No comments yet</div>
         )}
       </div>
diff --git a/web/service/workflow-comment.ts b/web/service/workflow-comment.ts
index 7d91515888..e9a34a4bf3 100644
--- a/web/service/workflow-comment.ts
+++ b/web/service/workflow-comment.ts
@@ -15,12 +15,12 @@ export type WorkflowCommentList = {
   content: string
   created_by: string
   created_by_account: UserProfile
-  created_at: string
-  updated_at: string
+  created_at: number
+  updated_at: number
   resolved: boolean
   resolved_by?: string
   resolved_by_account?: UserProfile
-  resolved_at?: string
+  resolved_at?: number
   mention_count: number
   reply_count: number
   participants: UserProfile[]