Implement Redux Persist for state persistence across page reloads

- Install redux-persist package
- Configure persistReducer with whitelist (offline, activities, children)
- Exclude network slice from persistence (should be fresh on reload)
- Add PersistGate to ReduxProvider with loading indicator
- Configure serializableCheck to ignore persist actions
- Store state now persists to localStorage automatically

This fixes the issue where app state was lost on page reload, improving UX.

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

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

maternal-web/components/providers/ReduxProvider.tsx

@@ -2,8 +2,10 @@
 
 import { useEffect, useRef } from 'react';
 import { Provider } from 'react-redux';
-import { store } from '@/store/store';
+import { PersistGate } from 'redux-persist/integration/react';
+import { store, persistor } from '@/store/store';
 import { setupNetworkDetection } from '@/store/middleware/offlineMiddleware';
+import { CircularProgress, Box } from '@mui/material';
 
 export function ReduxProvider({ children }: { children: React.ReactNode }) {
   const cleanupRef = useRef<(() => void) | null>(null);
@@ -20,5 +22,25 @@ export function ReduxProvider({ children }: { children: React.ReactNode }) {
     };
   }, []);
 
-  return <Provider store={store}>{children}</Provider>;
+  return (
+    <Provider store={store}>
+      <PersistGate
+        loading={
+          <Box
+            sx={{
+              display: 'flex',
+              justifyContent: 'center',
+              alignItems: 'center',
+              minHeight: '100vh'
+            }}
+          >
+            <CircularProgress />
+          </Box>
+        }
+        persistor={persistor}
+      >
+        {children}
+      </PersistGate>
+    </Provider>
+  );
 }

maternal-web/package.json

@@ -32,8 +32,11 @@
     "react": "^18",
     "react-dom": "^18",
     "react-hook-form": "^7.63.0",
+    "react-markdown": "^10.1.0",
     "react-redux": "^9.2.0",
     "recharts": "^3.2.1",
+    "redux-persist": "^6.0.0",
+    "remark-gfm": "^4.0.1",
     "socket.io-client": "^4.8.1",
     "web-vitals": "^5.1.0",
     "workbox-webpack-plugin": "^7.3.0",

maternal-web/store/store.ts

@@ -1,4 +1,7 @@
 import { configureStore, Middleware } from '@reduxjs/toolkit';
+import { persistStore, persistReducer, FLUSH, REHYDRATE, PAUSE, PERSIST, PURGE, REGISTER } from 'redux-persist';
+import storage from 'redux-persist/lib/storage'; // defaults to localStorage for web
+import { combineReducers } from '@reduxjs/toolkit';
 
 // Slices
 import offlineReducer from './slices/offlineSlice';
@@ -10,26 +13,41 @@ import networkReducer from './slices/networkSlice';
 import { offlineMiddleware } from './middleware/offlineMiddleware';
 import { syncMiddleware } from './middleware/syncMiddleware';
 
-export const store = configureStore({
-  reducer: {
+// Persist configuration
+const persistConfig = {
+  key: 'root',
+  version: 1,
+  storage,
+  // Only persist these slices (exclude network status as it should be fresh on reload)
+  whitelist: ['offline', 'activities', 'children'],
+};
+
+const rootReducer = combineReducers({
   offline: offlineReducer,
   activities: activitiesReducer,
   children: childrenReducer,
   network: networkReducer,
-  },
+});
+
+const persistedReducer = persistReducer(persistConfig, rootReducer);
+
+export const store = configureStore({
+  reducer: persistedReducer,
   middleware: (getDefaultMiddleware) =>
     getDefaultMiddleware({
       serializableCheck: {
-        // Ignore these action types for serialization check
-        ignoredActions: ['persist/PERSIST', 'persist/REHYDRATE'],
+        // Ignore redux-persist action types
+        ignoredActions: [FLUSH, REHYDRATE, PAUSE, PERSIST, PURGE, REGISTER, 'persist/PERSIST', 'persist/REHYDRATE'],
         // Ignore these field paths in all actions
-        ignoredActionPaths: ['meta.arg', 'payload.timestamp'],
+        ignoredActionPaths: ['meta.arg', 'payload.timestamp', 'register'],
         // Ignore these paths in the state
-        ignoredPaths: ['items.dates'],
+        ignoredPaths: ['items.dates', 'register'],
       },
     }).concat(offlineMiddleware, syncMiddleware),
 });
 
+export const persistor = persistStore(store);
+
 // Infer the `RootState` and `AppDispatch` types from the store itself
 export type RootState = ReturnType<typeof store.getState>;
 export type AppDispatch = typeof store.dispatch;