feat: tighten desktop presence loop and refine admin-web UX

- Shrink desktop presence TTL to 30s and heartbeat to 15s so unexpected
  client exits surface within one TTL even if the explicit offline call
  is missed; keep migration default aligned.
- Trust a known presence miss in resolveDesktopClientOnline instead of
  falling back to the recent-heartbeat heuristic, so a still-cached
  LastSeenAt cannot mask an offline client.
- Release the runtime session before clearing renderer desktop sessions
  on shutdown to avoid leaving stale leases behind.
- Auto-refresh the MediaView account list every 5s and revamp card
  layout (inline platform badge, status tags, UID row, meta box).
- Let the brand-question AI wizard accept multiple seed topics via a
  tag-style input; candidates from each topic are merged and deduped.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/admin-web/src/i18n/messages/en-US.ts

@@ -1403,6 +1403,9 @@ const enUS = {
       ai: {
         note: 'AI expansion consumes 1 AI point. Failed generations are refunded automatically.',
         seedTopic: 'Seed topic',
+        seedTopicPlaceholder: 'Enter a topic and press Enter; multiple topics supported',
+        seedTopicHint:
+          'Use Enter, commas, or semicolons to add multiple topics. Candidates are merged and deduplicated automatically.',
         generate: 'Generate with AI',
         waitingTitle: 'AI is generating candidate questions. Please wait...',
         waitingStages: {

apps/admin-web/src/i18n/messages/zh-CN.ts

@@ -1331,6 +1331,8 @@ const zhCN = {
       ai: {
         note: "AI 扩展会消耗 1 个 AI 点；生成失败时系统会自动退还。",
         seedTopic: "扩展主题",
+        seedTopicPlaceholder: "输入主题后按回车，可添加多个",
+        seedTopicHint: "支持回车、逗号或分号分隔多个主题；系统会逐个扩展并自动合并去重。",
         generate: "AI 生成候选",
         waitingTitle: "AI 正在生成候选问题，请稍后…",
         waitingStages: {

apps/admin-web/src/views/BrandQuestionCreateView.vue

@@ -2,7 +2,6 @@
 import {
   DeleteOutlined,
   EditOutlined,
-  BulbOutlined,
   LeftOutlined,
   RobotOutlined,
   SaveOutlined,
@@ -70,9 +69,11 @@ const expansionForm = reactive({
 })
 
 const aiForm = reactive({
-  seed_topic: '',
+  seed_topics: [] as string[],
 })
 
+const aiTopicTokenSeparators = [',', '，', ';', '；', '\n']
+
 const batchForm = reactive({
   text: '',
 })
@@ -241,10 +242,17 @@ const previewMutations = {
     },
   }),
   ai: useMutation({
-    mutationFn: () =>
+    mutationFn: async () => {
-      brandsApi.distillQuestions(brandId.value, {
+      const topics = normalizedAiSeedTopics.value
-        seed_topic: aiForm.seed_topic.trim(),
+      const results = await Promise.all(
-      }),
+        topics.map((topic) =>
+          brandsApi.distillQuestions(brandId.value, {
+            seed_topic: topic,
+          }),
+        ),
+      )
+      return mergeQuestionCandidateResults(results)
+    },
     onSuccess: (result) => {
       candidateRows.value = toCandidateRows(result.candidates)
       if (result.cache_hit) {
@@ -333,6 +341,81 @@ function splitLines(value: string | string[]): string[] {
     .filter(Boolean)
 }
 
+function normalizedTopicParts(value: string): string[] {
+  return value
+    .split(/\r?\n|,|，|;|；/)
+    .map((item) => item.trim())
+    .filter(Boolean)
+}
+
+const normalizedAiSeedTopics = computed(() => {
+  const seen = new Set<string>()
+  const topics: string[] = []
+  for (const rawTopic of aiForm.seed_topics) {
+    for (const topic of normalizedTopicParts(rawTopic)) {
+      const key = topic.toLowerCase()
+      if (seen.has(key)) {
+        continue
+      }
+      seen.add(key)
+      topics.push(topic)
+    }
+  }
+  return topics
+})
+
+function updateAiSeedTopics(value: string[]): void {
+  aiForm.seed_topics.splice(0, aiForm.seed_topics.length, ...dedupeTopicParts(value))
+}
+
+function dedupeTopicParts(values: string[]): string[] {
+  const seen = new Set<string>()
+  const topics: string[] = []
+  for (const value of values) {
+    for (const topic of normalizedTopicParts(value)) {
+      const key = topic.toLowerCase()
+      if (seen.has(key)) {
+        continue
+      }
+      seen.add(key)
+      topics.push(topic)
+    }
+  }
+  return topics
+}
+
+function mergeQuestionCandidateResults(
+  results: Awaited<ReturnType<typeof brandsApi.distillQuestions>>[],
+) {
+  const seen = new Set<string>()
+  const candidates: QuestionCandidate[] = []
+  let aiPointsCharged = 0
+  let cacheHit = false
+  let truncated = false
+
+  for (const result of results) {
+    aiPointsCharged += result.ai_points_charged ?? 0
+    cacheHit = cacheHit || Boolean(result.cache_hit)
+    truncated = truncated || Boolean(result.truncated)
+
+    for (const candidate of result.candidates) {
+      const key = normalizeQuestionKey(candidate.text)
+      if (!key || seen.has(key)) {
+        continue
+      }
+      seen.add(key)
+      candidates.push(candidate)
+    }
+  }
+
+  return {
+    candidates,
+    ai_points_charged: aiPointsCharged || undefined,
+    cache_hit: cacheHit,
+    truncated,
+  }
+}
+
 type ColumnKey = 'region' | 'prefix' | 'core' | 'industry' | 'suffix'
 
 function handleInput(column: ColumnKey, index: number) {
@@ -356,7 +439,9 @@ function handleEnter(column: ColumnKey, index: number) {
     arr.splice(index + 1, 0, '')
   }
   setTimeout(() => {
-    const inputs = document.querySelectorAll(`.word-column[data-col="${column}"] .word-column__input`) as NodeListOf<HTMLInputElement>
+    const inputs = document.querySelectorAll(
+      `.word-column[data-col="${column}"] .word-column__input`,
+    ) as NodeListOf<HTMLInputElement>
     if (inputs[index + 1]) {
       inputs[index + 1].focus()
     }
@@ -369,7 +454,9 @@ function handleBackspace(column: ColumnKey, index: number, event: KeyboardEvent)
     event.preventDefault()
     arr.splice(index, 1)
     setTimeout(() => {
-      const inputs = document.querySelectorAll(`.word-column[data-col="${column}"] .word-column__input`) as NodeListOf<HTMLInputElement>
+      const inputs = document.querySelectorAll(
+        `.word-column[data-col="${column}"] .word-column__input`,
+      ) as NodeListOf<HTMLInputElement>
       const target = inputs[index - 1 >= 0 ? index - 1 : 0]
       if (target) {
         target.focus()
@@ -552,7 +639,7 @@ async function generateCandidates(): Promise<void> {
     return
   }
 
-  if (!aiForm.seed_topic.trim()) {
+  if (!normalizedAiSeedTopics.value.length) {
     pageNotice.value = t('brands.questions.errors.emptyInput')
     return
   }
@@ -835,18 +922,20 @@ function backToBrands(): void {
           </div>
 
           <div v-else-if="createMode === 'ai'" class="wizard-card">
-            <div class="wizard-ai-banner">
-              <div class="wizard-ai-banner__info">
-                <RobotOutlined class="wizard-ai-banner__icon" />
-                <div class="wizard-ai-banner__text">
-                  <h4>{{ t('brands.questions.ai.generate') }}</h4>
-                  <p>{{ t('brands.questions.ai.note') }}</p>
-                </div>
-              </div>
-            </div>
             <div class="field-item field-item--compact">
               <label>{{ t('brands.questions.ai.seedTopic') }}</label>
-              <a-input v-model:value="aiForm.seed_topic" />
+              <a-select
+                class="seed-topic-select"
+                mode="tags"
+                :value="aiForm.seed_topics"
+                :placeholder="t('brands.questions.ai.seedTopicPlaceholder')"
+                :token-separators="aiTopicTokenSeparators"
+                :options="[]"
+                @change="(value: string[]) => updateAiSeedTopics(value)"
+              />
+              <p class="field-item__hint">
+                {{ t('brands.questions.ai.seedTopicHint') }}
+              </p>
             </div>
           </div>
 
@@ -1167,6 +1256,39 @@ function backToBrands(): void {
   content: '：';
 }
 
+.field-item__hint {
+  margin: 0;
+  color: #64748b;
+  font-size: 13px;
+  line-height: 1.6;
+}
+
+.seed-topic-select {
+  width: 100%;
+}
+
+.seed-topic-select :deep(.ant-select-selector) {
+  min-height: 52px;
+  padding: 8px 12px;
+  border-color: #d9d9d9 !important;
+  border-radius: 8px;
+}
+
+.seed-topic-select :deep(.ant-select-selection-overflow) {
+  gap: 6px;
+}
+
+.seed-topic-select :deep(.ant-select-selection-item) {
+  display: inline-flex;
+  align-items: center;
+  max-width: 100%;
+  min-height: 28px;
+  color: #1e293b;
+  background: #f1f5f9;
+  border-color: #dbe3ee;
+  border-radius: 6px;
+}
+
 .tool-header-actions {
   display: flex;
   flex-wrap: wrap;
@@ -1359,41 +1481,6 @@ function backToBrands(): void {
   color: #ef4444;
 }
 
-.wizard-ai-banner {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  padding: 16px 20px;
-  background: linear-gradient(135deg, rgba(22, 119, 255, 0.04), rgba(22, 119, 255, 0.08));
-  border: 1px solid rgba(22, 119, 255, 0.15);
-  border-radius: 16px;
-  box-shadow: 0 4px 16px rgba(22, 119, 255, 0.05);
-}
-
-.wizard-ai-banner__info {
-  display: flex;
-  align-items: center;
-  gap: 16px;
-}
-
-.wizard-ai-banner__icon {
-  font-size: 28px;
-  color: #1677ff;
-}
-
-.wizard-ai-banner__text h4 {
-  margin: 0 0 4px;
-  color: #1f2f4d;
-  font-size: 15px;
-  font-weight: 700;
-}
-
-.wizard-ai-banner__text p {
-  margin: 0;
-  color: #6b7a99;
-  font-size: 13px;
-}
-
 .candidate-list {
   display: grid;
   grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));

apps/admin-web/src/views/MediaView.vue

@@ -67,6 +67,9 @@ const platformsQuery = useQuery({
 const accountsQuery = useQuery({
   queryKey: ['tenant', 'desktop-accounts', 'media-view'],
   queryFn: () => tenantAccountsApi.list(),
+  staleTime: 0,
+  refetchInterval: 5_000,
+  refetchOnWindowFocus: true,
 })
 
 const loading = computed(() => platformsQuery.isPending.value || accountsQuery.isPending.value)
@@ -374,57 +377,47 @@ async function refreshAll(): Promise<void> {
                 </span>
 
                 <div class="media-card__identity-copy">
-                  <h3>{{ account.displayName }}</h3>
+                  <h3>
-                  <p>{{ account.platformLabel }}</p>
+                    {{ account.displayName }}
+                    <img
+                      v-if="account.platformLogoUrl"
+                      :src="account.platformLogoUrl"
+                      :alt="account.platformLabel"
+                      class="media-card__inline-platform-icon"
+                    />
+                    <span v-else class="media-card__inline-platform-text" :style="{ color: account.platformAccent }">{{ account.platformShortName }}</span>
+                  </h3>
+                  <p>
+                    <span class="media-card__platform-name">{{ account.platformLabel }}</span>
+                    <span class="media-card__uid-divider">|</span>
+                    <span class="media-card__uid">UID: {{ account.platformUid }}</span>
+                  </p>
                 </div>
               </div>
-
-              <div class="media-card__platform-badge" :style="{ color: account.platformAccent }">
-                <img
-                  v-if="account.platformLogoUrl"
-                  :src="account.platformLogoUrl"
-                  :alt="account.platformLabel"
-                />
-                <span v-else>{{ account.platformShortName }}</span>
-              </div>
             </div>
 
-            <div class="media-card__meta">
+            <div class="media-card__tags">
-              <div class="meta-row">
+              <a-tag :color="healthColor(account.health)">
-                <span class="meta-label">平台 UID</span>
+                {{ healthLabel(account.health) }}
-                <span class="meta-value">{{ account.platformUid }}</span>
+              </a-tag>
-              </div>
+              <a-tag :color="publishStateColor(account.publishState)">
-              <div class="meta-row">
+                {{ publishStateLabel(account.publishState) }}
-                <span class="meta-label">授权状态</span>
+              </a-tag>
-                <a-tag :color="healthColor(account.health)">
+              <a-tooltip :title="clientStatusText(account)" placement="top">
-                  {{ healthLabel(account.health) }}
+                <a-tag :color="clientStatusColor(account)" class="client-status-tag">
+                  {{ clientStatusText(account) }}
                 </a-tag>
-              </div>
+              </a-tooltip>
-              <div class="meta-row">
+            </div>
+
+            <div class="media-card__meta-box">
+              <div class="meta-box-item">
                 <span class="meta-label">最近校验</span>
-                <span class="meta-value">
+                <span class="meta-value">{{ account.verifiedAt ? formatDateTime(account.verifiedAt) : '--' }}</span>
-                  {{ account.verifiedAt ? formatDateTime(account.verifiedAt) : '--' }}
-                </span>
               </div>
-              <div class="meta-row">
+              <div class="meta-box-item">
-                <span class="meta-label">客户端状态</span>
-                <a-tooltip :title="clientStatusText(account)" placement="topLeft">
-                  <a-tag :color="clientStatusColor(account)" class="client-status-tag">
-                    {{ clientStatusText(account) }}
-                  </a-tag>
-                </a-tooltip>
-              </div>
-              <div class="meta-row">
                 <span class="meta-label">最近心跳</span>
-                <span class="meta-value">
+                <span class="meta-value">{{ account.clientLastSeenAt ? formatDateTime(account.clientLastSeenAt) : '--' }}</span>
-                  {{ account.clientLastSeenAt ? formatDateTime(account.clientLastSeenAt) : '--' }}
-                </span>
-              </div>
-              <div class="meta-row">
-                <span class="meta-label">发布状态</span>
-                <a-tag :color="publishStateColor(account.publishState)">
-                  {{ publishStateLabel(account.publishState) }}
-                </a-tag>
               </div>
             </div>
 
@@ -564,43 +557,47 @@ async function refreshAll(): Promise<void> {
 }
 
 .media-card {
-  border: 1px solid #e6edf5;
+  border: 1px solid #f0f0f0;
-  border-radius: 16px;
+  border-radius: 12px;
-  padding: 18px;
+  padding: 20px;
-  background:
+  background: #ffffff;
-    radial-gradient(circle at top right, rgba(31, 92, 255, 0.06), transparent 28%),
-    linear-gradient(180deg, #ffffff 0%, #fbfcff 100%);
   display: flex;
   flex-direction: column;
-  gap: 18px;
+  gap: 16px;
+  transition: all 0.3s ease;
+}
+
+.media-card:hover {
+  box-shadow: 0 12px 28px -6px rgba(0, 0, 0, 0.05);
+  border-color: transparent;
+  transform: translateY(-2px);
 }
 
 .media-card__head {
   display: flex;
-  align-items: flex-start;
+  align-items: center;
-  justify-content: space-between;
-  gap: 12px;
 }
 
 .media-card__identity {
   display: flex;
   align-items: center;
-  gap: 12px;
+  gap: 14px;
   min-width: 0;
 }
 
 .media-card__avatar {
-  width: 44px;
+  width: 48px;
-  height: 44px;
+  height: 48px;
-  border-radius: 14px;
+  border-radius: 50%;
   display: inline-flex;
   align-items: center;
   justify-content: center;
   color: #fff;
   font-size: 18px;
-  font-weight: 700;
+  font-weight: 600;
   overflow: hidden;
   flex-shrink: 0;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
 }
 
 .media-card__avatar img {
@@ -615,68 +612,93 @@ async function refreshAll(): Promise<void> {
 
 .media-card__identity-copy h3 {
   margin: 0;
-  color: #1a1a1a;
+  color: #1e293b;
-  font-size: 15px;
+  font-size: 16px;
+  font-weight: 600;
+  line-height: 1.4;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.media-card__inline-platform-icon {
+  width: 16px;
+  height: 16px;
+  object-fit: contain;
+}
+
+.media-card__inline-platform-text {
+  font-size: 12px;
   font-weight: 700;
-  line-height: 1.3;
+  background: #f8fafc;
+  padding: 2px 6px;
+  border-radius: 4px;
 }
 
 .media-card__identity-copy p {
   margin: 4px 0 0;
-  color: #8c8c8c;
+  color: #64748b;
+  font-size: 13px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.media-card__platform-name {
+  font-weight: 500;
+}
+
+.media-card__uid-divider {
+  color: #cbd5e1;
+}
+
+.media-card__uid {
+  color: #94a3b8;
+  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
   font-size: 12px;
 }
 
-.media-card__platform-badge {
+.media-card__tags {
-  width: 36px;
+  display: flex;
-  height: 36px;
+  flex-wrap: wrap;
-  border-radius: 12px;
+  gap: 8px;
-  background: #f7f9fc;
-  border: 1px solid #e6edf5;
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-  font-size: 15px;
-  font-weight: 700;
-  flex-shrink: 0;
-  overflow: hidden;
 }
 
-.media-card__platform-badge img {
+.media-card__tags :deep(.ant-tag) {
-  width: 20px;
+  margin: 0;
-  height: 20px;
+  border: none;
-  object-fit: contain;
+  border-radius: 6px;
+  font-weight: 500;
+  padding: 2px 8px;
 }
 
-.media-card__meta {
+.media-card__meta-box {
+  background: #f8fafc;
+  border-radius: 8px;
+  padding: 12px 16px;
   display: flex;
   flex-direction: column;
-  gap: 10px;
+  gap: 8px;
 }
 
-.meta-row {
+.meta-box-item {
   display: flex;
   justify-content: space-between;
-  gap: 16px;
   align-items: center;
+  font-size: 12px;
 }
 
 .meta-label {
-  color: #8c8c8c;
+  color: #64748b;
-  font-size: 12px;
-  flex-shrink: 0;
 }
 
 .meta-value {
-  color: #1a1a1a;
+  color: #334155;
-  font-size: 13px;
   font-weight: 500;
-  text-align: right;
-  word-break: break-all;
 }
 
 .client-status-tag {
-  max-width: 160px;
+  max-width: 140px;
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;

apps/desktop-client/src/main/bootstrap.ts

@@ -1061,8 +1061,8 @@ if (!hasSingleInstanceLock) {
 
     void Promise.race([
       (async () => {
-        await clearRendererDesktopSessions()
         await releaseRuntimeSession()
+        await clearRendererDesktopSessions()
       })(),
       new Promise<void>((resolve) => setTimeout(resolve, 1500)),
     ]).finally(() => {

apps/desktop-client/src/main/runtime-controller.ts

@@ -145,7 +145,7 @@ type MonitorExecutionPhase =
   | 'PARSING'
   | 'POSTING'
 
-const heartbeatIntervalMs = 25_000
+const heartbeatIntervalMs = 15_000
 const pullIntervalMs = 60_000
 const leaseExtendIntervalMs = 60_000
 const maxActivityItems = 60

server/internal/tenant/app/desktop_account_service.go

@@ -656,8 +656,8 @@ func resolveDesktopClientOnline(
 	if client == nil || client.RevokedAt != nil {
 		return false
 	}
-	if presenceKnown && presence {
+	if presenceKnown {
-		return true
+		return presence
 	}
 	if client.LastSeenAt == nil {
 		return false

server/internal/tenant/app/desktop_account_service_test.go

@@ -21,15 +21,27 @@ func TestResolveDesktopClientOnline_PresenceHitWins(t *testing.T) {
 	assert.True(t, online)
 }
 
-func TestResolveDesktopClientOnline_FallsBackToRecentHeartbeatWhenPresenceMisses(t *testing.T) {
+func TestResolveDesktopClientOnline_PresenceMissWithKnownPresenceIsOffline(t *testing.T) {
 	now := time.Date(2026, 4, 19, 21, 30, 0, 0, time.UTC)
-	lastSeen := now.Add(-30 * time.Second)
+	lastSeen := now.Add(-desktopClientPresenceTTL / 2)
 
 	online := resolveDesktopClientOnline(&repository.DesktopClient{
 		ID:         uuid.New(),
 		LastSeenAt: &lastSeen,
 	}, false, true, now)
 
+	assert.False(t, online)
+}
+
+func TestResolveDesktopClientOnline_FallsBackToRecentHeartbeatWhenPresenceUnknown(t *testing.T) {
+	now := time.Date(2026, 4, 19, 21, 30, 0, 0, time.UTC)
+	lastSeen := now.Add(-desktopClientPresenceTTL / 2)
+
+	online := resolveDesktopClientOnline(&repository.DesktopClient{
+		ID:         uuid.New(),
+		LastSeenAt: &lastSeen,
+	}, false, false, now)
+
 	assert.True(t, online)
 }
 

server/internal/tenant/app/desktop_presence.go

@@ -10,10 +10,10 @@ import (
 )
 
 // desktopClientPresenceTTL is also used as the monitoring primary-client lease TTL.
-// Desktop heartbeat interval must stay below TTL/2, so one missed heartbeat does
+// Desktop heartbeat interval is TTL/2, so unexpected client exits are reflected
-// not make another client eligible to steal a still-healthy primary lease.
+// as offline within one TTL even when the explicit offline request is missed.
-const desktopClientPresenceTTL = 90 * time.Second
+const desktopClientPresenceTTL = 30 * time.Second
-const desktopAccountPresenceTTL = 90 * time.Second
+const desktopAccountPresenceTTL = 30 * time.Second
 
 func desktopClientPresenceKey(clientID uuid.UUID) string {
 	return "desktop:presence:client:" + clientID.String()

server/migrations/20260424130000_add_desktop_primary_leases.up.sql

@@ -1,7 +1,7 @@
--- Backfilled primary leases use the same 90s TTL as
+-- Backfilled primary leases use the same 30s TTL as
 -- server/internal/tenant/app/desktop_presence.go:desktopClientPresenceTTL.
--- Keep these values aligned; desktop heartbeat interval must be < TTL/2 so
+-- Keep these values aligned; desktop heartbeat interval is TTL/2 so unexpected
--- a single missed heartbeat does not let another client steal primary.
+-- client exits are reflected within one TTL even if explicit offline is missed.
 CREATE TABLE IF NOT EXISTS desktop_client_primary_leases (
     tenant_id BIGINT NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
     workspace_id BIGINT NOT NULL REFERENCES workspaces(id) ON DELETE CASCADE,
@@ -33,7 +33,7 @@ SELECT
     tenant_id,
     workspace_id,
     id,
-    COALESCE(last_seen_at, created_at) + INTERVAL '90 seconds'
+    COALESCE(last_seen_at, created_at) + INTERVAL '30 seconds'
 FROM (
     SELECT
         dc.id,