feat(agent): add permission mode display component for empty session state (#11204)

Replace empty state text with a visual permission mode display card that shows:
- Permission mode icon with unique colors for each mode (default, plan, acceptEdits, bypassPermissions)
- Permission mode title and description
- Clickable to navigate directly to tooling settings tab

Replace loading text with Ant Design Spin component for better UX.

src/renderer/src/pages/home/Messages/AgentSessionMessages.tsx

@@ -5,11 +5,13 @@ import { useTopicMessages } from '@renderer/hooks/useMessageOperations'
 import { getGroupedMessages } from '@renderer/services/MessagesService'
 import { type Topic, TopicType } from '@renderer/types'
 import { buildAgentSessionTopicId } from '@renderer/utils/agentSession'
+import { Spin } from 'antd'
 import { memo, useMemo } from 'react'
 import styled from 'styled-components'
 
 import MessageGroup from './MessageGroup'
 import NarrowLayout from './NarrowLayout'
+import PermissionModeDisplay from './PermissionModeDisplay'
 import { MessagesContainer, ScrollContainer } from './shared'
 
 const logger = loggerService.withContext('AgentSessionMessages')
@@ -67,8 +69,12 @@ const AgentSessionMessages: React.FC<Props> = ({ agentId, sessionId }) => {
               groupedMessages.map(([key, groupMessages]) => (
                 <MessageGroup key={key} messages={groupMessages} topic={derivedTopic} />
               ))
+            ) : session ? (
+              <PermissionModeDisplay session={session} agentId={agentId} />
             ) : (
-              <EmptyState>{session ? 'No messages yet.' : 'Loading session...'}</EmptyState>
+              <LoadingState>
+                <Spin size="small" />
+              </LoadingState>
             )}
           </ScrollContainer>
         </ContextMenu>
@@ -77,10 +83,10 @@ const AgentSessionMessages: React.FC<Props> = ({ agentId, sessionId }) => {
   )
 }
 
-const EmptyState = styled.div`
-  color: var(--color-text-3);
-  font-size: 12px;
-  text-align: center;
+const LoadingState = styled.div`
+  display: flex;
+  justify-content: center;
+  align-items: center;
   padding: 20px 0;
 `
 

src/renderer/src/pages/home/Messages/PermissionModeDisplay.tsx

@@ -0,0 +1,82 @@
+import { permissionModeCards } from '@renderer/config/agent'
+import SessionSettingsPopup from '@renderer/pages/settings/AgentSettings/SessionSettingsPopup'
+import type { GetAgentSessionResponse, PermissionMode } from '@renderer/types'
+import { FileEdit, Lightbulb, Shield, ShieldOff } from 'lucide-react'
+import type { FC } from 'react'
+import { useMemo } from 'react'
+import { useTranslation } from 'react-i18next'
+
+interface Props {
+  session: GetAgentSessionResponse
+  agentId: string
+}
+
+const getPermissionModeConfig = (mode: PermissionMode) => {
+  switch (mode) {
+    case 'default':
+      return {
+        icon: <Shield size={18} color="var(--color-primary)" />
+      }
+    case 'plan':
+      return {
+        icon: <Lightbulb size={18} color="#faad14" />
+      }
+    case 'acceptEdits':
+      return {
+        icon: <FileEdit size={18} color="#52c41a" />
+      }
+    case 'bypassPermissions':
+      return {
+        icon: <ShieldOff size={18} color="var(--color-error)" />
+      }
+    default:
+      return {
+        icon: <Shield size={18} color="var(--color-primary)" />
+      }
+  }
+}
+
+const PermissionModeDisplay: FC<Props> = ({ session, agentId }) => {
+  const { t } = useTranslation()
+
+  const permissionMode = session?.configuration?.permission_mode ?? 'default'
+
+  const modeCard = useMemo(() => {
+    return permissionModeCards.find((card) => card.mode === permissionMode)
+  }, [permissionMode])
+
+  const modeConfig = useMemo(() => getPermissionModeConfig(permissionMode), [permissionMode])
+
+  const handleClick = () => {
+    SessionSettingsPopup.show({
+      agentId,
+      sessionId: session.id,
+      tab: 'tooling'
+    })
+  }
+
+  if (!modeCard) {
+    return null
+  }
+
+  return (
+    <div
+      onClick={handleClick}
+      className="mx-2 cursor-pointer rounded-lg border-[0.5px] border-[var(--color-border)] px-3 py-2">
+      <div className="flex items-center gap-2.5">
+        <div className="flex shrink-0 items-center justify-center">{modeConfig.icon}</div>
+        <div className="flex min-w-0 flex-1 flex-col gap-0.5">
+          <div className="overflow-hidden text-ellipsis whitespace-nowrap font-semibold text-[var(--color-text-1)] text-xs">
+            {t(modeCard.titleKey, modeCard.titleFallback)}
+          </div>
+          <div className="overflow-hidden text-ellipsis whitespace-nowrap text-[11px] text-[var(--color-text-2)] leading-[1.4]">
+            {t(modeCard.descriptionKey, modeCard.descriptionFallback)}{' '}
+            {t(modeCard.behaviorKey, modeCard.behaviorFallback)}
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default PermissionModeDisplay