perf(CompanyOverview): hooks 支持 enabled 延迟加载和刷新

- 所有 hooks 参数改为 options 对象形式
- 新增 enabled 参数支持延迟加载
- 新增 refreshKey 参数支持手动刷新
- 智能初始化 loading 状态，避免首次渲染闪现空状态

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/views/Company/components/CompanyOverview/hooks/useShareholderData.ts

@@ -11,6 +11,13 @@ interface ApiResponse<T> {
   data: T;
 }
 
+// 支持延迟加载的配置选项
+interface UseShareholderDataOptions {
+  stockCode?: string;
+  /** 是否启用数据加载，默认 true */
+  enabled?: boolean;
+}
+
 interface UseShareholderDataResult {
   actualControl: ActualControl[];
   concentration: Concentration[];
@@ -21,19 +28,25 @@ interface UseShareholderDataResult {
 }
 
 /**
- * 股权结构数据 Hook
- * @param stockCode - 股票代码
+ * 股权结构数据 Hook（支持延迟加载）
+ * @param options - 配置选项
+ * @param options.stockCode - 股票代码
+ * @param options.enabled - 是否启用数据加载，默认 true
  */
-export const useShareholderData = (stockCode?: string): UseShareholderDataResult => {
+export const useShareholderData = (options: UseShareholderDataOptions): UseShareholderDataResult => {
+  const { stockCode, enabled = true } = options;
+
   const [actualControl, setActualControl] = useState<ActualControl[]>([]);
   const [concentration, setConcentration] = useState<Concentration[]>([]);
   const [topShareholders, setTopShareholders] = useState<Shareholder[]>([]);
   const [topCirculationShareholders, setTopCirculationShareholders] = useState<Shareholder[]>([]);
-  const [loading, setLoading] = useState(false);
+  // 智能初始化 loading：当需要加载数据时，初始值为 true，避免首次渲染闪现空状态
+  const [loading, setLoading] = useState(() => enabled && !!stockCode);
   const [error, setError] = useState<string | null>(null);
 
   useEffect(() => {
-    if (!stockCode) return;
+    // 只有 enabled 且有 stockCode 时才请求
+    if (!enabled || !stockCode) return;
 
     const controller = new AbortController();
 
@@ -69,7 +82,7 @@ export const useShareholderData = (stockCode?: string): UseShareholderDataResult
 
     loadData();
     return () => controller.abort();
-  }, [stockCode]);
+  }, [stockCode, enabled]);
 
   return {
     actualControl,