diff --git a/src/App.js b/src/App.js
index 69f71e41..a0641ea6 100755
--- a/src/App.js
+++ b/src/App.js
@@ -114,6 +114,16 @@ function AppContent() {
 
                 // 初始化 PostHog
                 dispatch(posthogSliceModule.initializePostHog());
+
+                // ⚡ 刷新注入前缓存的事件（避免丢失）
+                const pendingEvents = posthogSliceModule.flushPendingEventsBeforeInjection();
+                if (pendingEvents.length > 0) {
+                    logger.info('App', `刷新 ${pendingEvents.length} 个注入前缓存的事件`);
+                    pendingEvents.forEach(({ eventName, properties }) => {
+                        posthogModule.trackEventAsync(eventName, properties);
+                    });
+                }
+
                 logger.info('App', 'PostHog 模块空闲时加载完成，Redux 初始化已触发');
             } catch (error) {
                 logger.error('App', 'PostHog 加载失败', error);
diff --git a/src/store/slices/posthogSlice.js b/src/store/slices/posthogSlice.js
index 8b5a4287..66216c20 100644
--- a/src/store/slices/posthogSlice.js
+++ b/src/store/slices/posthogSlice.js
@@ -12,6 +12,19 @@ import {
 } from '../../lib/posthog';
 import { logger } from '../../utils/logger';
 
+// ⚡ 模块级缓存：存储 reducer 注入前的事件（避免丢失）
+let pendingEventsBeforeInjection = [];
+
+/**
+ * 获取并清空注入前缓存的事件
+ * 在 App.js 中 reducer 注入后调用
+ */
+export const flushPendingEventsBeforeInjection = () => {
+  const events = [...pendingEventsBeforeInjection];
+  pendingEventsBeforeInjection = [];
+  return events;
+};
+
 // ==================== Initial State ====================
 
 const initialState = {
@@ -51,7 +64,15 @@ export const initializePostHog = createAsyncThunk(
   'posthog/initialize',
   async (_, { getState, rejectWithValue }) => {
     try {
-      const { config } = getState().posthog;
+      const posthogState = getState().posthog;
+
+      // ⚡ 防御性检查：reducer 尚未注入
+      if (!posthogState) {
+        logger.warn('PostHog', 'PostHog reducer 尚未注入，跳过初始化');
+        return { isInitialized: false, skipped: true };
+      }
+
+      const { config } = posthogState;
 
       if (!config.apiKey) {
         logger.warn('PostHog', '未配置 API Key，分析功能将被禁用');
@@ -112,7 +133,20 @@ export const trackEvent = createAsyncThunk(
   'posthog/trackEvent',
   async ({ eventName, properties = {} }, { getState, rejectWithValue }) => {
     try {
-      const { isInitialized } = getState().posthog;
+      const posthogState = getState().posthog;
+
+      // ⚡ reducer 尚未注入：缓存到模块级队列（不丢弃）
+      if (!posthogState) {
+        logger.debug('PostHog', 'PostHog reducer 尚未注入，事件已缓存', { eventName });
+        pendingEventsBeforeInjection.push({
+          eventName,
+          properties,
+          timestamp: new Date().toISOString()
+        });
+        return { eventName, properties, pendingInjection: true };
+      }
+
+      const { isInitialized } = posthogState;
 
       if (!isInitialized) {
         logger.warn('PostHog', 'PostHog 未初始化，事件将被缓存', { eventName });
@@ -160,7 +194,14 @@ export const flushCachedEvents = createAsyncThunk(
   'posthog/flushCachedEvents',
   async (_, { getState, dispatch }) => {
     try {
-      const { eventQueue, isInitialized } = getState().posthog;
+      const posthogState = getState().posthog;
+
+      // ⚡ 防御性检查：reducer 尚未注入
+      if (!posthogState) {
+        return { flushed: 0, skipped: true };
+      }
+
+      const { eventQueue, isInitialized } = posthogState;
 
       if (!isInitialized || eventQueue.length === 0) {
         return { flushed: 0 };
@@ -281,15 +322,16 @@ export const {
 
 // ==================== Selectors ====================
 
-export const selectPostHog = (state) => state.posthog;
-export const selectIsInitialized = (state) => state.posthog.isInitialized;
-export const selectUser = (state) => state.posthog.user;
-export const selectFeatureFlags = (state) => state.posthog.featureFlags;
-export const selectEventQueue = (state) => state.posthog.eventQueue;
-export const selectStats = (state) => state.posthog.stats;
+// ⚡ 安全的 selectors（支持 reducer 未注入的情况）
+export const selectPostHog = (state) => state.posthog || initialState;
+export const selectIsInitialized = (state) => state.posthog?.isInitialized ?? false;
+export const selectUser = (state) => state.posthog?.user ?? null;
+export const selectFeatureFlags = (state) => state.posthog?.featureFlags ?? {};
+export const selectEventQueue = (state) => state.posthog?.eventQueue ?? [];
+export const selectStats = (state) => state.posthog?.stats ?? initialState.stats;
 
 export const selectFeatureFlag = (flagKey) => (state) => {
-  return state.posthog.featureFlags[flagKey] || posthogGetFeatureFlag(flagKey);
+  return state.posthog?.featureFlags?.[flagKey] || posthogGetFeatureFlag(flagKey);
 };
 
 export const selectIsOptedOut = () => posthogHasOptedOut();