perf: 地图坐标json使用缓存

frontend/src/store/modules/map.js

+const state = {
+  geoMap: {}
+}
+
+const mutations = {
+
+  SET_GEO: (state, { key, value }) => {
+    state.geoMap[key] = value
+  }
+
+}
+
+const actions = {
+  setGeo({ commit }, data) {
+    commit('SET_GEO', data)
+  }
+}
+
+export default {
+  namespaced: true,
+  state,
+  mutations,
+  actions
+}
+