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)/events/page.tsx

@@ -3,12 +3,14 @@
 import { useState } from "react";
 import { listMajorEvents, listInquiries } from "@/lib/api-v2";
 import { useScopeEffect } from "@/lib/company-scope";
+import { CompanyNameTag } from "@/components/shared/CompanyNameTag";
 import { PageContainer, Badge } from "@/components/shared/PageContainer";
 import { LoadingSpinner } from "@/components/shared/LoadingSpinner";
 import { EmptyState } from "@/components/shared/EmptyState";
 
 /** 重大事项项。 */
 interface MajorEvent {
+  company_id?: string;
   event_type: string;
   title: string;
   severity: string;
@@ -17,6 +19,7 @@ interface MajorEvent {
 
 /** 追问清单项。 */
 interface Inquiry {
+  company_id?: string;
   status: string;
   questions?: unknown[];
 }
@@ -69,6 +72,7 @@ export default function EventsPage() {
                 <div className="flex items-center justify-between">
                   <div className="flex items-center gap-2">
                     <Badge color="blue">{item.event_type}</Badge>
+                    <CompanyNameTag companyId={item.company_id} />
                     <h3 className="font-medium text-gray-900">{item.title}</h3>
                   </div>
                   <Badge color={item.severity === "critical" ? "red" : item.severity === "high" ? "amber" : "gray"}>