diff --git a/src/agentkit/server/frontend/src/api/types.ts b/src/agentkit/server/frontend/src/api/types.ts
index e8e4401..8509a81 100644
--- a/src/agentkit/server/frontend/src/api/types.ts
+++ b/src/agentkit/server/frontend/src/api/types.ts
@@ -346,6 +346,8 @@ export interface IExpertSpeechData {
 /** round_summary event payload */
 export interface IRoundSummaryData {
   moderator_name: string;
+  moderator_avatar?: string;
+  moderator_color?: string;
   content: string;
   round: number;
   continue: boolean;
diff --git a/src/agentkit/server/frontend/src/components/chat/StickyModeHeader.vue b/src/agentkit/server/frontend/src/components/chat/StickyModeHeader.vue
index b6e53ef..9d3983c 100644
--- a/src/agentkit/server/frontend/src/components/chat/StickyModeHeader.vue
+++ b/src/agentkit/server/frontend/src/components/chat/StickyModeHeader.vue
@@ -37,7 +37,7 @@
             class="sticky-mode-header__avatar"
             :class="{ 'sticky-mode-header__avatar--lead': expert.isLead }"
             type="button"
-            :style="{ borderColor: expert.color }"
+            :style="{ background: expert.color, color: 'var(--text-inverse)', borderColor: expert.color }"
             :aria-label="`查看 ${expert.name} 详情`"
             :aria-expanded="openKey === expert.key"
           >
@@ -62,7 +62,7 @@
               >
                 <span
                   class="expert-list__avatar"
-                  :style="{ borderColor: expert.color }"
+                  :style="{ background: expert.color, color: 'var(--text-inverse)', borderColor: expert.color }"
                 >{{ expert.avatar }}</span>
                 <span class="expert-list__name">{{ expert.name }}</span>
                 <span v-if="expert.isLead" class="expert-list__tag">Lead</span>
@@ -153,11 +153,40 @@ const allExperts = computed<IExpertDisplay[]>(() => {
   }
   if (mode.value === 'board') {
     const list = chatStore.boardState?.experts ?? []
+    // 颜色一致性：优先使用当前会话 messages 中最近的 board_speech/
+    // round_summary 的 expert_color（与 MessageShell 头像同源），保证
+    // 顶部卡片头像与对话头像颜色严格匹配；缺失时回退到 boardState
+    // 中保存的 YAML color。
+    const liveColorByName = new Map<string, string>()
+    const liveAvatarByName = new Map<string, string>()
+    const conv = chatStore.conversations.find(
+      (c: { id: string; messages?: unknown[] }) => c.id === chatStore.currentConversationId,
+    )
+    if (conv?.messages) {
+      // walk from latest to earliest to capture the most recent identity
+      for (let i = conv.messages.length - 1; i >= 0; i--) {
+        const m = conv.messages[i] as {
+          message_type?: string
+          expert_name?: string
+          expert_color?: string
+          expert_avatar?: string
+        }
+        if (
+          (m.message_type === 'board_speech' ||
+            m.message_type === 'board_summary') &&
+          m.expert_name &&
+          !liveColorByName.has(m.expert_name)
+        ) {
+          if (m.expert_color) liveColorByName.set(m.expert_name, m.expert_color)
+          if (m.expert_avatar) liveAvatarByName.set(m.expert_name, m.expert_avatar)
+        }
+      }
+    }
     return list.map((e: IBoardExpert, idx: number) => ({
       key: `${e.name}-${idx}`,
       name: e.name,
-      avatar: e.avatar,
-      color: e.color,
+      avatar: liveAvatarByName.get(e.name) ?? e.avatar,
+      color: liveColorByName.get(e.name) ?? e.color,
       persona: e.persona,
       description: e.is_moderator ? '主持人' : undefined,
       isLead: false,
diff --git a/src/agentkit/server/frontend/src/components/chat/helpers/expertIdentity.ts b/src/agentkit/server/frontend/src/components/chat/helpers/expertIdentity.ts
index 6f8b8bb..b2f285e 100644
--- a/src/agentkit/server/frontend/src/components/chat/helpers/expertIdentity.ts
+++ b/src/agentkit/server/frontend/src/components/chat/helpers/expertIdentity.ts
@@ -14,20 +14,20 @@ export interface ExpertIdentity {
   color: string
 }
 
-/** Non-blue palette. Order is stable — do not reshuffle (would break identity). */
+/** Neutral slate palette (GitHub/professional style). Order is stable — do not reshuffle. */
 const PALETTE: ReadonlyArray<string> = [
-  "#d97706", // amber 600
-  "#059669", // emerald 600
-  "#7c3aed", // violet 600
-  "#db2777", // pink 600
-  "#0e7490", // cyan 700
-  "#65a30d", // lime 600
-  "#c2410c", // orange 700
-  "#9333ea", // purple 600
-  "#0891b2", // sky 600
-  "#a16207", // yellow 700
-  "#be185d", // rose 700
-  "#15803d", // green 700
+  "#4b5563", // slate 600
+  "#6b7280", // gray 500
+  "#9ca3af", // gray 400
+  "#374151", // gray 800
+  "#1f2937", // gray 900
+  "#1e40af", // blue 800 (deep, non-vivid)
+  "#166534", // green 800
+  "#7c2d12", // orange 900
+  "#581c87", // purple 900
+  "#155e75", // cyan 800
+  "#92400e", // amber 800
+  "#78716c", // stone 500
 ]
 
 /** djb2-style string hash — stable across JS engines and reloads. */
diff --git a/src/agentkit/server/frontend/src/components/chat/helpers/useMessageRenderer.ts b/src/agentkit/server/frontend/src/components/chat/helpers/useMessageRenderer.ts
index 1e2773b..d094f61 100644
--- a/src/agentkit/server/frontend/src/components/chat/helpers/useMessageRenderer.ts
+++ b/src/agentkit/server/frontend/src/components/chat/helpers/useMessageRenderer.ts
@@ -55,19 +55,19 @@ export function resolveMessageType(message: IChatMessage): MessageViewType {
   switch (message.message_type) {
     case 'plan_update':
       return 'team_plan'
-    // 2026-07-01: board_* events render as plain assistant bubbles (streaming).
-    // The user's first @board/@team message already shows a structured card
-    // (UserBubble) with topic + expert count + expert list; rendering
-    // dedicated cards (BoardBannerCard / BoardRoundCard / BoardConclusionCard)
-    // for the subsequent board_started/board_speech/board_summary/
-    // board_conclusion events duplicates the banner and breaks the natural
-    // chat flow. Fall through to 'assistant' so the content streams
-    // inline.
+    // 2026-07-02: 恢复 board_* 事件走专用卡片路径，落地方案B
+    // (中性灰阶头像/名字/颜色徽章/对话气泡 + 左侧3px色条)。
+    // UserBubble 仅渲染用户输入的 @board 指令文本卡片，
+    // BoardBannerCard 渲染后端回送的 board_started 事件 (含专家 chip + 进度条)，
+    // 二者职责不同，不构成重复。
     case 'board_started':
+      return 'board_banner'
     case 'board_speech':
+      return 'board_speech'
     case 'board_summary':
+      return 'board_summary'
     case 'board_conclusion':
-      return 'assistant'
+      return 'board_conclusion'
     case 'debate_started':
       return 'debate_started'
     case 'debate_argument':
@@ -149,42 +149,34 @@ export function useMessageRenderer(message: IChatMessage) {
         }
       }
 
-      case 'board_speech':
+      case 'board_speech': {
+        const roleTag = message.board_role === 'moderator' ? '主持' : '专家'
         return {
           type,
           shell: {
             name: message.expert_name || '专家',
-            meta: message.board_round ? `第 ${message.board_round} 轮${message.board_role === 'moderator' ? ' · 主持' : ''}` : time,
+            meta: message.board_round ? `第 ${message.board_round} 轮 · ${roleTag}` : `${roleTag}`,
             avatar: message.expert_avatar,
             color: message.expert_color,
           },
           component: BoardRoundCard,
           props: {
-            name: message.expert_name || '专家',
-            avatar: message.expert_avatar || '',
-            color: message.expert_color,
-            round: message.board_round,
-            role: message.board_role === 'moderator' ? 'moderator' : 'expert',
             content: message.content || '',
           },
         }
+      }
 
       case 'board_summary':
         return {
           type,
           shell: {
             name: message.expert_name || '主持人',
-            meta: message.board_round ? `第 ${message.board_round} 轮 · 小结` : time,
+            meta: message.board_round ? `第 ${message.board_round} 轮 · 小结` : '小结',
             avatar: message.expert_avatar,
             color: message.expert_color,
           },
           component: BoardRoundCard,
           props: {
-            name: message.expert_name || '主持人',
-            avatar: message.expert_avatar || '',
-            color: message.expert_color,
-            round: message.board_round,
-            role: 'summary',
             content: message.content || '',
           },
         }
diff --git a/src/agentkit/server/frontend/src/components/chat/messages/BoardRoundCard.vue b/src/agentkit/server/frontend/src/components/chat/messages/BoardRoundCard.vue
index 7f81aab..9e57cb2 100644
--- a/src/agentkit/server/frontend/src/components/chat/messages/BoardRoundCard.vue
+++ b/src/agentkit/server/frontend/src/components/chat/messages/BoardRoundCard.vue
@@ -1,19 +1,6 @@
 <template>
-  <div class="board-round-card" :class="[`board-round-card--${role}`]">
-    <div class="board-round-card__header">
-      <span
-        class="board-round-card__avatar"
-        :style="avatarStyle"
-      >
-        {{ avatar || name.charAt(0) }}
-      </span>
-      <span class="board-round-card__name">{{ name }}</span>
-      <span v-if="round" class="board-round-card__round">第 {{ round }} 轮</span>
-      <span v-if="roleTag" class="board-round-card__role">{{ roleTag }}</span>
-    </div>
-    <div class="board-round-card__content">
-      <AssistantText :message="textMessage" />
-    </div>
+  <div class="board-round-card">
+    <AssistantText :message="textMessage" />
   </div>
 </template>
 
@@ -23,37 +10,16 @@ import type { IChatMessage } from '@/api/types'
 import AssistantText from './AssistantText.vue'
 
 interface Props {
-  name: string
-  avatar?: string
-  color?: string
-  round?: number
-  role?: 'moderator' | 'expert' | 'summary'
   content: string
 }
 
-const props = withDefaults(defineProps<Props>(), {
-  avatar: '',
-  role: 'expert',
-})
-
-const roleTag = computed(() => {
-  const tags: Record<string, string> = {
-    moderator: '主持',
-    expert: '专家',
-    summary: '小结',
-  }
-  return tags[props.role] || ''
-})
-
-const avatarStyle = computed(() => {
-  if (props.color) {
-    return { background: props.color }
-  }
-  return { background: 'var(--accent-board)' }
-})
+const props = defineProps<Props>()
 
+// 方案B: BoardRoundCard 仅作为 Board 发言的纯内容容器，
+// 渲染 AssistantText 的流式文本。头像/名字/轮次/角色标签等元信息
+// 全部由外层 MessageShell 的 header 负责，避免重复渲染。
 const textMessage = computed<IChatMessage>(() => ({
-  id: `board-${props.name}-${props.round || 0}`,
+  id: `board-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`,
   role: 'assistant',
   content: props.content,
   timestamp: new Date().toISOString(),
@@ -64,63 +30,5 @@ const textMessage = computed<IChatMessage>(() => ({
 <style scoped>
 .board-round-card {
   width: 100%;
-  background: var(--bg-primary);
-  border: 1px solid var(--border-color);
-  border-left: 3px solid var(--accent-board);
-  border-radius: var(--radius-card);
-  box-shadow: var(--shadow-card);
-  overflow: hidden;
-}
-
-.board-round-card--summary {
-  background: var(--accent-board-soft);
-  border-left-color: var(--accent-board);
-}
-
-.board-round-card__header {
-  display: flex;
-  align-items: center;
-  gap: var(--space-2);
-  padding: var(--space-2) var(--space-3);
-  border-bottom: 1px solid var(--border-color);
-}
-
-.board-round-card__avatar {
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-  width: 22px;
-  height: 22px;
-  border-radius: var(--radius-full);
-  font-size: 12px;
-  color: var(--text-inverse);
-}
-
-.board-round-card__name {
-  font-size: var(--font-sm);
-  font-weight: var(--font-weight-medium);
-  color: var(--text-primary);
-}
-
-.board-round-card__round {
-  font-size: var(--font-xs);
-  color: var(--text-tertiary);
-}
-
-.board-round-card__role {
-  margin-left: auto;
-  font-size: var(--font-xs);
-  padding: 1px 6px;
-  border-radius: var(--radius-sm);
-  background: var(--accent-board-soft);
-  color: var(--accent-board);
-}
-
-.board-round-card__content {
-  padding: var(--space-2) var(--space-3);
-}
-
-.board-round-card__content :deep(p) {
-  margin: 0;
 }
 </style>
diff --git a/src/agentkit/server/frontend/src/components/chat/messages/MessageShell.vue b/src/agentkit/server/frontend/src/components/chat/messages/MessageShell.vue
index 3975165..0a692a4 100644
--- a/src/agentkit/server/frontend/src/components/chat/messages/MessageShell.vue
+++ b/src/agentkit/server/frontend/src/components/chat/messages/MessageShell.vue
@@ -20,13 +20,13 @@
     </div>
     <div class="message-shell__body">
       <div class="message-shell__header">
-        <!-- U4 R10: 专家身份 badge — 用 expert_color 高亮 expert_name，流式期间及结束后均保留 -->
+        <!-- 方案B: 专家名字始终是纯文本 (粗体)，彩色身份由头像背景承担，
+             不再渲染彩色 pill 名字徽章 -->
         <span
-          v-if="expertName"
-          class="message-shell__expert-badge"
-          :style="{ backgroundColor: expertColor || '#1890ff' }"
-        >{{ expertName }}</span>
-        <span v-else class="message-shell__name">{{ name }}</span>
+          v-if="expertName || name"
+          class="message-shell__name"
+          :class="{ 'message-shell__name--expert': !!expertName }"
+        >{{ expertName || name }}</span>
         <span v-if="meta" class="message-shell__meta">{{ meta }}</span>
         <span
           v-if="streaming"
@@ -152,20 +152,10 @@ withDefaults(defineProps<Props>(), {
   font-weight: var(--font-weight-medium);
 }
 
-/* U4 R10: 专家身份 badge — 彩色 pill，区别于普通 name 文本与 avatar */
-.message-shell__expert-badge {
-  display: inline-flex;
-  align-items: center;
-  padding: 0 var(--space-2);
-  border-radius: var(--radius-full);
-  color: var(--text-inverse, #fff);
-  font-size: var(--font-xs);
+/* 方案B: 专家名字 — 粗体文本 + 略深色，与普通 name 区分 (无 pill 背景) */
+.message-shell__name--expert {
+  color: var(--text-primary);
   font-weight: var(--font-weight-semibold);
-  line-height: 1.6;
-  max-width: 12em;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
 }
 
 .message-shell__meta {
diff --git a/src/agentkit/server/frontend/src/components/preview/scenes/Scene4BoardDiscussion.vue b/src/agentkit/server/frontend/src/components/preview/scenes/Scene4BoardDiscussion.vue
index 3655877..04337dd 100644
--- a/src/agentkit/server/frontend/src/components/preview/scenes/Scene4BoardDiscussion.vue
+++ b/src/agentkit/server/frontend/src/components/preview/scenes/Scene4BoardDiscussion.vue
@@ -14,37 +14,16 @@
         />
       </MessageShell>
 
-      <MessageShell role="assistant" name="架构师老张" meta="第 1 轮" avatar="张" color="var(--accent-board)">
-        <BoardRoundCard
-          name="架构师老张"
-          avatar="张"
-          color="var(--accent-board)"
-          :round="1"
-          role="expert"
-          :content="speech1.content"
-        />
+      <MessageShell role="assistant" name="架构师老张" meta="第 1 轮 · 专家" avatar="张" color="var(--accent-board)">
+        <BoardRoundCard :content="speech1.content" />
       </MessageShell>
 
-      <MessageShell role="assistant" name="后端负责人小李" meta="第 1 轮" avatar="李" color="var(--accent-board)">
-        <BoardRoundCard
-          name="后端负责人小李"
-          avatar="李"
-          color="var(--accent-board)"
-          :round="1"
-          role="expert"
-          :content="speech2.content"
-        />
+      <MessageShell role="assistant" name="后端负责人小李" meta="第 1 轮 · 专家" avatar="李" color="var(--accent-board)">
+        <BoardRoundCard :content="speech2.content" />
       </MessageShell>
 
       <MessageShell role="assistant" name="主持人" meta="第 1 轮 · 小结" avatar="主" color="var(--accent-board)">
-        <BoardRoundCard
-          name="主持人"
-          avatar="主"
-          color="var(--accent-board)"
-          :round="1"
-          role="summary"
-          :content="summaryMessage.content"
-        />
+        <BoardRoundCard :content="summaryMessage.content" />
       </MessageShell>
 
       <MessageShell role="assistant" name="主持人" meta="11:05">
diff --git a/src/agentkit/server/frontend/src/stores/chatStream.ts b/src/agentkit/server/frontend/src/stores/chatStream.ts
index 8e099cc..39f35c9 100644
--- a/src/agentkit/server/frontend/src/stores/chatStream.ts
+++ b/src/agentkit/server/frontend/src/stores/chatStream.ts
@@ -1296,14 +1296,17 @@ export function dispatchWsEvent(
         (c) => c.id === conversationId,
       );
       if (!conv) break;
-      // Stable identity for the moderator, just like expert_speech.
+      // Stable identity for the moderator. Prefer the event's
+      // moderator_avatar/moderator_color (added in 2026-07-02 so persistence
+      // has the same identity) and fall back to the boardState snapshot
+      // captured at board_started.
       const moderator = state.boardState.value?.experts.find(
         (e) => e.name === summaryData.moderator_name,
       );
       const identity = resolveExpertIdentity(
         summaryData.moderator_name,
-        moderator?.avatar,
-        moderator?.color,
+        summaryData.moderator_avatar || moderator?.avatar,
+        summaryData.moderator_color || moderator?.color,
       );
       const summaryMsg: IChatMessage = {
         id: generateId(),
diff --git a/src/agentkit/server/frontend/src/views/LoginView.vue b/src/agentkit/server/frontend/src/views/LoginView.vue
index 09d0cb7..d8ff373 100644
--- a/src/agentkit/server/frontend/src/views/LoginView.vue
+++ b/src/agentkit/server/frontend/src/views/LoginView.vue
@@ -181,6 +181,20 @@ onMounted(async () => {
   font-weight: 600;
 }
 
+/* 显式绑定到 token — AntD ConfigProvider token 在 tauri 冷启动时序
+   不稳定，这里兜底强制使用项目主色（#1a1a1a 近黑），避免蓝色兜底。 */
+.login-submit.ant-btn-primary,
+.login-submit.ant-btn-primary:hover,
+.login-submit.ant-btn-primary:focus {
+  background-color: var(--color-primary, #1a1a1a);
+  border-color: var(--color-primary, #1a1a1a);
+  color: var(--text-inverse, #ffffff);
+}
+.login-submit.ant-btn-primary:hover {
+  background-color: var(--color-primary-hover, #2f2f2f);
+  border-color: var(--color-primary-hover, #2f2f2f);
+}
+
 .login-remember {
   margin-bottom: 16px;
 }