[moz] feat(frontend): 工具链面板加 from/to 显示 + 筛选 + 修复事件类型未知

- 前端：列表项加 from → to 标签（Agent 中文名）
- 前端：加「全部 / 未处理」筛选按钮
- 前端：详情区也显示 from → to
- 后端：ToolchainContextSection 修复事件类型 fallback 为中文标签
- 后端：加来源/指派信息到 prompt 消息体

src/frontend/src/components/ToolchainPanel.tsx

@@ -4,6 +4,28 @@
  */
 import { useEffect, useState } from 'react';
 
+const AGENT_NAMES: Record<string, string> = {
+  'pangtong-fujunshi': '庞统',
+  'simayi-challenger': '司马懿',
+  'zhangfei-dev': '张飞',
+  'guanyu-dev': '关羽',
+  'zhaoyun-data': '赵云',
+  'jiangwei-infra': '姜维',
+  'system': '系统',
+};
+
+const EVENT_LABELS: Record<string, string> = {
+  'review_request': 'Review 请求',
+  'review_result': 'Review 结果',
+  'review_merged': 'PR 合并',
+  'review_comment': 'Review 评论',
+  'review_updated': 'Review 更新',
+  'ci_failure': 'CI 失败',
+  'deploy_failure': '部署失败',
+  'issue_assigned': 'Issue 指派',
+  'mention': '@提及',
+};
+
 const STATUS_COLORS: Record<string, string> = {
   pending: '#f59e0b22', claimed: '#6a9eff22', working: '#6a9eff22',
   review: '#818cf822', done: '#2ecc8a22', failed: '#ef444422',
@@ -36,6 +58,7 @@ export default function ToolchainPanel() {
   const [detail, setDetail] = useState<any>(null);
   const [searchQuery, setSearchQuery] = useState('');
   const [loading, setLoading] = useState(false);
+  const [filterMode, setFilterMode] = useState<'all' | 'pending'>('all');
 
   const loadTasks = async (q?: string) => {
     setLoading(true);
@@ -52,6 +75,10 @@ export default function ToolchainPanel() {
     setLoading(false);
   };
 
+  const displayed = filterMode === 'pending'
+    ? tasks.filter(t => !['done', 'failed', 'cancelled'].includes(t.status))
+    : tasks;
+
   useEffect(() => { loadTasks(); }, []);
 
   // 搜索防抖 300ms
@@ -120,7 +147,19 @@ export default function ToolchainPanel() {
             padding: '3px 8px', borderRadius: 4, fontSize: 10,
             border: '1px solid #2a3550', background: '#161b2e', color: '#8899aa', cursor: 'pointer',
           }}>🔄</button>
-          <span style={{ fontSize: 10, color: 'var(--muted)' }}>{tasks.length} 条</span>
+          <button onClick={() => setFilterMode('all')} style={{
+            padding: '3px 8px', borderRadius: 4, fontSize: 10,
+            border: `1px solid ${filterMode === 'all' ? 'var(--acc)' : '#2a3550'}`,
+            background: filterMode === 'all' ? 'var(--acc)22' : '#161b2e',
+            color: filterMode === 'all' ? 'var(--acc)' : '#8899aa', cursor: 'pointer',
+          }}>全部</button>
+          <button onClick={() => setFilterMode('pending')} style={{
+            padding: '3px 8px', borderRadius: 4, fontSize: 10,
+            border: `1px solid ${filterMode === 'pending' ? 'var(--acc)' : '#2a3550'}`,
+            background: filterMode === 'pending' ? 'var(--acc)22' : '#161b2e',
+            color: filterMode === 'pending' ? 'var(--acc)' : '#8899aa', cursor: 'pointer',
+          }}>未处理</button>
+          <span style={{ fontSize: 10, color: 'var(--muted)' }}>{filterMode === 'pending' ? displayed.length : tasks.length} 条</span>
         </div>
 
         {/* 事件列表 */}
@@ -130,7 +169,7 @@ export default function ToolchainPanel() {
               {loading ? '加载中...' : '暂无工具链事件'}
             </div>
           )}
-          {tasks.map((t: any) => (
+          {displayed.map((t: any) => (
             <div key={t.id} onClick={() => setSelectedId(t.id)} style={{
               padding: '10px 14px', borderBottom: '1px solid var(--line)',
               cursor: 'pointer', transition: 'background .15s',
@@ -151,6 +190,9 @@ export default function ToolchainPanel() {
                 fontSize: 12, fontWeight: 500, color: '#dde4f8',
                 overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap',
               }}>{t.title}</div>
+              <div style={{ fontSize: 10, color: 'var(--muted)', marginTop: 2 }}>
+                {AGENT_NAMES['system'] || '系统'} → {AGENT_NAMES[t.assignee] || t.assignee || '?'}
+              </div>
             </div>
           ))}
         </div>
@@ -174,6 +216,9 @@ export default function ToolchainPanel() {
                 <span style={{ fontSize: 10, color: 'var(--muted)' }}>{detail.id}</span>
               </div>
               <div style={{ fontSize: 18, fontWeight: 700, lineHeight: 1.3 }}>{detail.title}</div>
+              <div style={{ fontSize: 11, color: 'var(--muted)', marginTop: 4 }}>
+                {AGENT_NAMES['system'] || '系统'} → {AGENT_NAMES[detail.assignee] || detail.assignee || '?'}
+              </div>
               <div style={{ fontSize: 12, color: 'var(--muted)', marginTop: 6 }}>
                 {fmtTime(detail.created_at)}
               </div>