Version: 0.9.30.dev.260419

后端：
1. 工具事件推送从通用 EmitStatus 重构为 EmitToolCallStart / EmitToolCallResult 结构化双事件
- newAgent/node/execute.go：executeToolCall / executePendingTool 两处调用路径分离为 Start + Result 两步推送；blocked 场景显式传入状态码，不再复用通用状态
- 新增工具事件摘要生成链：resolveToolEventResultStatus（结果状态映射）、buildToolEventResultSummary / tryExtractToolResultSummaryCN（JSON→中文结论提炼）、buildToolCallStartSummary /
buildToolArgumentsPreviewCN（参数白名单中文标签）、resolveToolDisplayNameCN（17 个工具中文名映射）、formatToolArgValueByKeyCN / formatToolArgValueCN（参数值格式化）
- newAgent/stream/emitter.go：EmitStatus / EmitToolCallStart / EmitToolCallResult 统一收敛到 emitExtraOnly，不再回写 reasoning_content；EmitToolCallResult 新增 status 参数

前端：
1. 全局侧边栏统一提升到 App.vue
- App.vue 新增 MainSidebar + smartflow-layout 双栏布局，三个页面共享导航；AssistantView / DashboardView / ScheduleView 移除各自内联 sidebar 定义、路由跳转、拖拽逻辑及全部样式
2. Assistant 消息流从纯文本重构为结构化 block 时间线
- AssistantPanel 新增 ToolTraceEvent / StatusTraceEvent / DisplayAssistantBlock 类型；handleStreamExtraEvent 按 extra.kind 分发四类事件；getDisplayAssistantBlocks 按 seq 排序统一渲染 tool/status/reasoning/content 五种 block
- 模板层改为 TransitionGroup 动态渲染；工具卡片左侧彩色状态条 + 可展开详情；状态行显示节点阶段中文文案；兼容旧协议 tool_* 状态码归并
- SSE 协议切换到 extra-only：shouldSuppressReasoningDeltaByExtraKind 抑制 status/tool 事件的 reasoning 累积；会话/首页加载锁定 800ms 最少时间保证骨架屏动画
3. 设计系统从渐变毛玻璃迁移到 Flat Modern 扁平化
- 全局色板统一 #3b82f6 / #f8fafc / #f1f5f9，替代旧蓝紫渐变；confirm 卡片琥珀色顶条、用户气泡蓝底白字、工具卡片状态色条
- 新增 dashboard-item-pop / board-item-pop / message-stagger / fade-switch / task-detail 等入场动画；WeekPlanningBoard 格子弹簧动画按行列错峰；TaskClassSidebar 详情展开 max-height 过渡 + 角标旋转
4. 路由新增 /prototype/tool-trace 原型页（ToolTracePrototypeView）

frontend/src/components/common/MainSidebar.vue

@@ -0,0 +1,167 @@
+<script setup lang="ts">
+import { computed } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
+import { ElMessage } from 'element-plus'
+
+interface SidebarItem {
+  key: 'home' | 'task' | 'calendar' | 'ai'
+  label: string
+  short: string
+  to?: '/dashboard' | '/assistant' | '/schedule'
+}
+
+const sidebarItems: SidebarItem[] = [
+  { key: 'home', label: '总览', short: '总', to: '/dashboard' },
+  { key: 'task', label: '任务', short: '任' },
+  { key: 'calendar', label: '日程', short: '程', to: '/schedule' },
+  { key: 'ai', label: '助手', short: 'AI', to: '/assistant' },
+]
+
+const route = useRoute()
+const router = useRouter()
+
+const activeSidebarKey = computed<SidebarItem['key']>(() => {
+  if (route.path.startsWith('/assistant')) return 'ai'
+  if (route.path.startsWith('/schedule')) return 'calendar'
+  return 'home'
+})
+
+const activeSidebarIndex = computed(() => {
+  return sidebarItems.findIndex(item => item.key === activeSidebarKey.value)
+})
+
+const activeIndicatorStyle = computed(() => {
+  return {
+    transform: `translateY(${activeSidebarIndex.value * 72}px)`
+  }
+})
+
+function handleSidebarNavigate(item: SidebarItem) {
+  if (item.to) {
+    if (route.path !== item.to) void router.push(item.to)
+    return
+  }
+  ElMessage.info(`${item.label} 页面正在开发中`)
+}
+</script>
+
+<template>
+  <aside class="dashboard-sidebar">
+    <div class="dashboard-sidebar__brand">S</div>
+    <nav class="dashboard-sidebar__nav">
+      <div class="dashboard-sidebar__nav-indicator" :style="activeIndicatorStyle" />
+      <button
+        v-for="item in sidebarItems"
+        :key="item.key"
+        type="button"
+        class="dashboard-sidebar__nav-item"
+        :class="{ 'dashboard-sidebar__nav-item--active': item.key === activeSidebarKey }"
+        @click="handleSidebarNavigate(item)"
+      >
+        <span>{{ item.short }}</span>
+        <small>{{ item.label }}</small>
+      </button>
+    </nav>
+    <button type="button" class="dashboard-sidebar__settings">设</button>
+  </aside>
+</template>
+
+<style scoped>
+.dashboard-sidebar {
+  width: 78px;
+  height: 100%;
+  border-radius: 24px;
+  background: #0f172a;
+  padding: 24px 12px;
+  display: flex;
+  flex-direction: column;
+  gap: 32px;
+  flex-shrink: 0;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
+}
+
+.dashboard-sidebar__brand {
+  width: 48px;
+  height: 48px;
+  border-radius: 14px;
+  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
+  color: #fff;
+  font-size: 20px;
+  font-weight: 800;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
+}
+
+.dashboard-sidebar__nav { position: relative; display: grid; gap: 12px; align-content: start; }
+
+.dashboard-sidebar__nav-indicator {
+  position: absolute;
+  left: 0;
+  top: 0;
+  width: 100%;
+  height: 60px;
+  background: rgba(255, 255, 255, 0.08);
+  border-radius: 16px;
+  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+  pointer-events: none;
+  z-index: 0;
+}
+
+.dashboard-sidebar__nav-item {
+  width: 100%;
+  height: 60px;
+  border: none;
+  border-radius: 16px;
+  background: transparent;
+  color: rgba(255, 255, 255, 0.45);
+  padding: 8px 0;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 2px;
+  cursor: pointer;
+  position: relative;
+  z-index: 1;
+  transition: color 0.2s;
+}
+
+.dashboard-sidebar__nav-item span {
+  width: 32px;
+  height: 32px;
+  border-radius: 11px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: transparent;
+  font-weight: 700;
+  font-size: 14px;
+  transition: all 0.2s;
+}
+
+.dashboard-sidebar__nav-item:hover { color: #f8fafc; }
+
+.dashboard-sidebar__nav-item small { font-size: 10px; font-weight: 500; opacity: 0.8; }
+
+.dashboard-sidebar__nav-item--active { color: #fff; }
+.dashboard-sidebar__nav-item--active span { background: #3b82f6; box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35); }
+
+.dashboard-sidebar__settings {
+  width: 48px;
+  height: 48px;
+  border: none;
+  border-radius: 14px;
+  background: rgba(255, 255, 255, 0.05);
+  color: #94a3b8;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  cursor: pointer;
+  transition: all 0.2s;
+  margin-top: auto;
+}
+
+.dashboard-sidebar__settings:hover { background: rgba(255, 255, 255, 0.1); color: #f8fafc; }
+</style>