feat(frontend): 全局企业筛选同步 — 各页面显示企业名标签

- 新增 useCompanyName hook 和 CompanyNameTag 组件
- 20+ investor 页面添加 CompanyNameTag 显示企业名
- 表格型页面（agents/agreements/board/weak-signals/talents/reports）新增企业列
- 卡片型页面（risks/synergies/sentinels/alpha/exit-signals/okrs/aars/events/tasks/pre-mortems/nudges/product-diagnostics/peer-circles）添加企业名标签
- customer-success 改用 CompanyNameTag 替代手动 company_name 显示
- PlanCard 组件添加企业名标签
- 编译验证通过

frontend/src/app/(investor)/agents/page.tsx

@@ -2,6 +2,7 @@
 
 import { useState } from "react";
 import { useScopeEffect } from "@/lib/company-scope";
+import { CompanyNameTag } from "@/components/shared/CompanyNameTag";
 import { listAgentExecutions, reviewAgentExecution } from "@/lib/api-v2";
 import { PageContainer, Badge} from "@/components/shared/PageContainer";
 import { LoadingSpinner } from "@/components/shared/LoadingSpinner";
@@ -11,6 +12,7 @@ import { toast } from "sonner";
 /** Agent 执行记录项。 */
 interface AgentExecution {
   id: string;
+  company_id?: string;
   agent_name: string;
   autonomy_level: string;
   output_summary: string;
@@ -52,6 +54,7 @@ export default function AgentsPage() {
           <table className="min-w-full divide-y divide-gray-200 text-sm">
             <thead className="bg-gray-50">
               <tr>
+                <th className="px-4 py-2 text-left font-medium text-gray-500">企业</th>
                 <th className="px-4 py-2 text-left font-medium text-gray-500">Agent</th>
                 <th className="px-4 py-2 text-left font-medium text-gray-500">自治级别</th>
                 <th className="px-4 py-2 text-left font-medium text-gray-500">输出摘要</th>
@@ -63,6 +66,7 @@ export default function AgentsPage() {
             <tbody className="divide-y divide-gray-100 bg-white">
               {items.map((item, i) => (
                 <tr key={i}>
+                  <td className="px-4 py-2"><CompanyNameTag companyId={item.company_id} /></td>
                   <td className="px-4 py-2 text-gray-900">{item.agent_name}</td>
                   <td className="px-4 py-2"><Badge color={item.autonomy_level === "L4" ? "red" : item.autonomy_level === "L3" ? "amber" : "blue"}>{item.autonomy_level}</Badge></td>
                   <td className="px-4 py-2 text-gray-600 max-w-xs truncate">{item.output_summary}</td>