fix(chat): U2 消息模型与分发器对齐后端事件

- board_started 现在保存为结构化消息并渲染 BoardBannerCard
- board_concluded 现在追加 board_conclusion 结构化消息
- 扩展 IChatMessage.status 包含 error
- 移除 chat.ts 中的 any 类型（保留 handleWsMessage 遗留 TODO）
- BoardBannerCard v-for key 使用 name-index 组合避免重复

src/agentkit/server/frontend/src/api/types.ts

@@ -38,16 +38,30 @@ export interface IChatMessage {
   routing_method?: string
   confidence?: number
   task_id?: string
-  status?: 'completed' | 'pending'
+  status?: 'completed' | 'pending' | 'error'
   tool_calls?: IToolCallData[]
   thinking?: string
   expert_id?: string
   expert_name?: string
   expert_color?: string
   expert_avatar?: string
-  message_type?: 'chat' | 'handoff' | 'assist_request' | 'plan_update' | 'milestone' | 'board_speech' | 'board_summary' | 'board_conclusion'
+  message_type?:
+    | 'chat'
+    | 'handoff'
+    | 'assist_request'
+    | 'plan_update'
+    | 'milestone'
+    | 'board_started'
+    | 'board_speech'
+    | 'board_summary'
+    | 'board_conclusion'
+    | 'error'
   board_round?: number
   board_role?: 'moderator' | 'expert' | 'user' | 'summary'
+  plan_phases?: ITeamPlanPhase[]
+  error_detail?: string
+  board_started?: IBoardStartedData
+  board_conclusion?: IBoardConcludedData
 }
 
 /** Conversation with messages */
@@ -218,6 +232,34 @@ export interface IBoardMessage {
   timestamp: number
 }
 
+/** Expert template (matches backend GET /api/v1/experts response item) */
+export interface IExpertTemplate {
+  name: string
+  description: string
+  is_builtin: boolean
+  avatar: string
+  color: string
+  persona: string
+  thinking_style: string
+  speaking_style: string
+  decision_framework: string
+}
+
+/** Experts list response (matches backend GET /api/v1/experts) */
+export interface IExpertsResponse {
+  experts: IExpertTemplate[]
+  total: number
+}
+
+/** File upload response (matches backend POST /api/v1/chat/upload) */
+export interface IUploadResponse {
+  filename: string
+  stored_name: string
+  content_type: string
+  size: number
+  download_url: string
+}
+
 /** API error */
 export interface IApiError {
   status: number

src/agentkit/server/frontend/src/components/chat/messages/BoardBannerCard.vue

@@ -0,0 +1,137 @@
+<template>
+  <div class="board-banner-card">
+    <div class="board-banner-card__bar" />
+    <div class="board-banner-card__body">
+      <div class="board-banner-card__title">
+        <span class="board-banner-card__icon">🏛️</span>
+        <span>私董会 — {{ topic }}</span>
+      </div>
+      <div class="board-banner-card__experts">
+        <span
+          v-for="(expert, idx) in experts"
+          :key="`${expert.name}-${idx}`"
+          class="board-banner-card__chip"
+          :class="{ 'board-banner-card__chip--moderator': expert.is_moderator }"
+        >
+          <span class="board-banner-card__chip-avatar">{{ expert.avatar }}</span>
+          <span>{{ expert.name }}</span>
+        </span>
+      </div>
+      <div class="board-banner-card__meta">
+        <span>轮次：第 {{ currentRound }} / {{ maxRounds }} 轮</span>
+        <div class="board-banner-card__progress">
+          <div
+            class="board-banner-card__progress-fill"
+            :style="{ width: progressPercent + '%' }"
+          />
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue'
+import type { IBoardExpert } from '@/api/types'
+
+interface Props {
+  topic: string
+  experts: IBoardExpert[]
+  maxRounds: number
+  currentRound?: number
+}
+
+const props = withDefaults(defineProps<Props>(), {
+  currentRound: 1,
+})
+
+const progressPercent = computed(() => {
+  if (props.maxRounds <= 0) return 0
+  return Math.min((props.currentRound / props.maxRounds) * 100, 100)
+})
+</script>
+
+<style scoped>
+.board-banner-card {
+  width: 100%;
+  background: var(--bg-primary);
+  border: 1px solid var(--border-color);
+  border-radius: var(--radius-card);
+  box-shadow: var(--shadow-card);
+  overflow: hidden;
+}
+
+.board-banner-card__bar {
+  height: 4px;
+  background: var(--accent-board);
+}
+
+.board-banner-card__body {
+  padding: var(--space-3) var(--space-4);
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-3);
+}
+
+.board-banner-card__title {
+  display: flex;
+  align-items: center;
+  gap: var(--space-2);
+  font-size: var(--font-md);
+  font-weight: var(--font-weight-semibold);
+  color: var(--text-primary);
+}
+
+.board-banner-card__icon {
+  font-size: var(--font-lg);
+}
+
+.board-banner-card__experts {
+  display: flex;
+  flex-wrap: wrap;
+  gap: var(--space-2);
+}
+
+.board-banner-card__chip {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  padding: 2px 8px;
+  background: var(--accent-board-soft);
+  color: var(--accent-board);
+  border-radius: var(--radius-full);
+  font-size: var(--font-xs);
+}
+
+.board-banner-card__chip--moderator {
+  background: var(--accent-board);
+  color: var(--text-inverse);
+}
+
+.board-banner-card__chip-avatar {
+  font-size: 12px;
+}
+
+.board-banner-card__meta {
+  display: flex;
+  align-items: center;
+  gap: var(--space-3);
+  font-size: var(--font-xs);
+  color: var(--text-tertiary);
+}
+
+.board-banner-card__progress {
+  flex: 1;
+  height: 4px;
+  background: var(--bg-tertiary);
+  border-radius: 2px;
+  overflow: hidden;
+}
+
+.board-banner-card__progress-fill {
+  height: 100%;
+  background: var(--accent-board);
+  border-radius: 2px;
+  transition: width 0.3s ease;
+}
+</style>

src/agentkit/server/frontend/src/stores/chat.ts

@@ -31,7 +31,7 @@ export const useChatStore = defineStore('chat', () => {
   // Board Meeting state (transient, only active during a board discussion)
   const boardState = ref<{
     topic: string
-    experts: Array<{ name: string; avatar: string; color: string; is_moderator: boolean }>
+    experts: Array<{ name: string; avatar: string; color: string; is_moderator: boolean; persona: string }>
     max_rounds: number
     current_round: number
     status: 'discussing' | 'concluding' | 'completed' | 'dissolved'
@@ -56,7 +56,7 @@ export const useChatStore = defineStore('chat', () => {
       const data = await apiClient.getConversations()
       // Normalize server response: backend returns {id, created_at, updated_at, message_count}
       // but frontend IConversation expects {id, title, messages, created_at, updated_at}
-      conversations.value = data.map((conv: any) => ({
+      conversations.value = data.map((conv: IConversation) => ({
         id: conv.id,
         title: conv.title || '对话',
         messages: Array.isArray(conv.messages) ? conv.messages : [],
@@ -276,7 +276,7 @@ export const useChatStore = defineStore('chat', () => {
 
     socket.onmessage = (event: MessageEvent) => {
       try {
-        const data = JSON.parse(event.data as string) as Record<string, any>
+        const data = JSON.parse(event.data as string) as Record<string, unknown>
         console.log('[Chat WS] Received:', data.type, data)
         handleWsMessage(data)
       } catch (error) {
@@ -403,6 +403,8 @@ export const useChatStore = defineStore('chat', () => {
     return _teamStore
   }
 
+  // TODO: refactor to WsServerMessage union to eliminate `any`.
+  // This function predates the current VI redesign and touches many legacy branches.
   function handleWsMessage(data: Record<string, any>): void {
     // Backend sends nested data: {type, data: {...}}
     // Flatten for easier access
@@ -700,6 +702,7 @@ export const useChatStore = defineStore('chat', () => {
             avatar: e.avatar,
             color: e.color,
             is_moderator: e.is_moderator,
+            persona: e.persona,
           })),
           max_rounds: data.max_rounds,
           current_round: 0,
@@ -708,18 +711,18 @@ export const useChatStore = defineStore('chat', () => {
         streamingSteps.value.push(
           `私董会已开启: 主题「${data.topic}」, ${data.experts.length} 位专家, 最多 ${data.max_rounds} 轮`
         )
-        // Push a system-style message to indicate board start
+        // Push a structured banner message so the renderer can show BoardBannerCard
         const conversationId = currentConversationId.value
         if (conversationId) {
           const startMsg: IChatMessage = {
             id: generateId(),
             role: 'assistant',
-            content: `🏛️ **私董会开始**\n\n**主题**: ${data.topic}\n**专家**: ${data.experts
-              .map((e) => `${e.avatar} ${e.name}${e.is_moderator ? ' (主持人)' : ''}`)
-              .join(', ')}\n**最大轮次**: ${data.max_rounds}`,
+            content: `🏛️ 私董会开始：${data.topic}`,
             timestamp: new Date().toISOString(),
             status: 'completed',
-            message_type: 'milestone',
+            message_type: 'board_started',
+            board_started: data,
+            board_round: 0,
           }
           appendMessage(conversationId, startMsg)
         }
@@ -789,9 +792,21 @@ export const useChatStore = defineStore('chat', () => {
         streamingSteps.value.push(
           `私董会结束: ${data.total_rounds} 轮讨论${data.error ? ' (异常)' : ''}`
         )
-        // The final_answer event will carry the formatted conclusion,
-        // so we don't need to add a separate message here.
-        // The conclusion is already persisted by the backend.
+        // Push a structured conclusion message so the renderer can show BoardConclusionCard
+        const conversationId = currentConversationId.value
+        if (conversationId) {
+          const conclusionMsg: IChatMessage = {
+            id: generateId(),
+            role: 'assistant',
+            content: data.summary || '私董会已结束',
+            timestamp: new Date().toISOString(),
+            status: 'completed',
+            message_type: 'board_conclusion',
+            board_conclusion: data,
+            board_round: data.total_rounds,
+          }
+          appendMessage(conversationId, conclusionMsg)
+        }
         // Clear board state after a short delay to allow UI to update
         setTimeout(() => {
           boardState.value = null