test(frontend): UIUX E2E 测试 — 新增路由导航/创始人端/Admin端/工作台/移动端适配

新增 6 个 E2E 测试文件，覆盖 2-task-uiux.md 全部 50 项任务：
- uiux-navigation.spec.ts: 8 tests (today/compare/threads/workspace/ooda/ai-plus/profiles)
- sidebar-navigation.spec.ts: 6 tests (投资人 Sidebar 6 业务域)
- founder-uiux.spec.ts: 7 tests (创始人端 6 域导航)
- admin-uiux.spec.ts: 3 tests (Admin 6 管理域 + 商业秘密保护)
- workbench-uiux.spec.ts: 5 tests (Highlights/WorkMode/Tab/InsightRail)
- mobile-uiux.spec.ts: 5 tests (移动端抽屉导航 + 创始人底部导航)

同时修复全部 no-explicit-any 警告，替换为 TypeScript 接口定义。

测试结果: 41 E2E passed, 405 backend passed

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

@@ -1,23 +1,36 @@
 "use client";
 
 import { useEffect, useState } from "react";
-import { AlertTriangle } from "lucide-react";
 import { listMajorEvents, listInquiries } from "@/lib/api-v2";
 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 {
+  event_type: string;
+  title: string;
+  severity: string;
+  description?: string;
+}
+
+/** 追问清单项。 */
+interface Inquiry {
+  status: string;
+  questions?: unknown[];
+}
+
 export default function EventsPage() {
-  const [events, setEvents] = useState<Record<string, any>[]>([]);
-  const [inquiries, setInquiries] = useState<Record<string, any>[]>([]);
+  const [events, setEvents] = useState<MajorEvent[]>([]);
+  const [inquiries, setInquiries] = useState<Inquiry[]>([]);
   const [isLoading, setIsLoading] = useState(true);
   const [tab, setTab] = useState<"events" | "inquiries">("events");
 
   useEffect(() => {
     Promise.all([listMajorEvents(), listInquiries()])
       .then(([e, i]) => {
-        setEvents((e.data as Record<string, any>[]) ?? []);
-        setInquiries((i.data as Record<string, any>[]) ?? []);
+        setEvents((e.data as MajorEvent[]) ?? []);
+        setInquiries((i.data as Inquiry[]) ?? []);
       })
       .catch(() => {
         setEvents([]);
@@ -54,14 +67,14 @@ export default function EventsPage() {
               <div key={i} className="rounded-lg border border-gray-200 bg-white p-4">
                 <div className="flex items-center justify-between">
                   <div className="flex items-center gap-2">
-                    <Badge color="blue">{item.event_type as string}</Badge>
-                    <h3 className="font-medium text-gray-900">{item.title as string}</h3>
+                    <Badge color="blue">{item.event_type}</Badge>
+                    <h3 className="font-medium text-gray-900">{item.title}</h3>
                   </div>
                   <Badge color={item.severity === "critical" ? "red" : item.severity === "high" ? "amber" : "gray"}>
-                    {item.severity as string}
+                    {item.severity}
                   </Badge>
                 </div>
-                {item.description && <p className="mt-2 text-sm text-gray-600">{item.description as string}</p>}
+                {item.description && <p className="mt-2 text-sm text-gray-600">{item.description}</p>}
               </div>
             ))}
           </div>
@@ -76,7 +89,7 @@ export default function EventsPage() {
                 <div className="flex items-center justify-between">
                   <h3 className="font-medium text-gray-900">追问清单</h3>
                   <Badge color={item.status === "answered" ? "green" : item.status === "closed" ? "gray" : "amber"}>
-                    {item.status as string}
+                    {item.status}
                   </Badge>
                 </div>
                 <div className="mt-2 space-y-1">