feat: store state in localStorage

ui/src/store/persistState.js

@@ -0,0 +1,20 @@
+export const loadState = () => {
+  try {
+    const serializedState = localStorage.getItem('state')
+    if (serializedState === null) {
+      return undefined
+    }
+    return JSON.parse(serializedState)
+  } catch (err) {
+    return undefined
+  }
+}
+
+export const saveState = (state) => {
+  try {
+    const serializedState = JSON.stringify(state)
+    localStorage.setItem('state', serializedState)
+  } catch (err) {
+    // Ignore write errors
+  }
+}