feat(map): add event-driven GPS update

src/utils/cacheStore.ts

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+// src/utils/cacheStore.ts
+interface CacheItem<T> {
+  data: T;
+  timestamp: number;
+}
+
+const TTL = 1 * 1000; // dữ liệu có hiệu lực trong 1 giây để GPS realtime
+const cache: Record<string, CacheItem<any>> = {};
+
+export function getCache<T>(key: string): T | null {
+  const item = cache[key];
+  if (!item) return null;
+  if (Date.now() - item.timestamp > TTL) {
+    delete cache[key];
+    return null;
+  }
+  return item.data;
+}
+
+export function setCache<T>(key: string, data: T) {
+  cache[key] = { data, timestamp: Date.now() };
+}
+
+export function invalidate(key: string) {
+  delete cache[key];
+}
+
+export function getAllCacheKeys(): string[] {
+  return Object.keys(cache);
+}

src/utils/eventBus.ts

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+// src/utils/eventBus.ts
+type EventHandler<T = any> = (data: T) => void;
+
+class EventBus {
+  private listeners: Record<string, EventHandler[]> = {};
+
+  on(event: string, handler: EventHandler) {
+    if (!this.listeners[event]) this.listeners[event] = [];
+    this.listeners[event].push(handler);
+  }
+
+  off(event: string, handler: EventHandler) {
+    this.listeners[event] = (this.listeners[event] || []).filter(
+      (h) => h !== handler,
+    );
+  }
+
+  emit(event: string, data?: any) {
+    (this.listeners[event] || []).forEach((h) => h(data));
+  }
+}
+
+// ✅ phải có dòng này
+export const eventBus = new EventBus();

src/utils/queryWithCache.ts

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+// utils/queryWithCache.ts
+import { getCache, setCache, invalidate, getAllCacheKeys } from './cacheStore';
+import { eventBus } from './eventBus';
+
+export async function queryWithCache<T>(
+  key: string,
+  fetcher: () => Promise<T>,
+): Promise<T> {
+  const cached = getCache<T>(key);
+  if (cached) return cached;
+
+  const data = await fetcher();
+  setCache(key, data);
+
+  // Phát sự kiện để các component khác biết có data mới
+  eventBus.emit(`${key}:update`, data);
+
+  return data;
+}
+
+// Xóa cache theo key hoặc prefix
+queryWithCache.clear = (prefix = '') => {
+  const keys = getAllCacheKeys();
+  for (const key of keys) {
+    if (key.startsWith(prefix)) invalidate(key);
+  }
+};