diff --git a/src/App.vue b/src/App.vue
index cf12112..dbbba97 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -57,7 +57,7 @@ const showApiKey = ref(false);
 const hackatimeDirectories = ref<any>(null);
 const sessionStats = ref<any>(null);
 const presenceData = ref<any>(null);
-const presenceRefreshInterval = ref<number | null>(null);
+const presenceRefreshInterval = ref<ReturnType<typeof setInterval> | null>(null);
 const presenceFetchInProgress = ref(false);
 const oauthUrl = ref<string | null>(null);
 const nextPresenceFetchAllowedAt = ref<number>(0);
diff --git a/src/components/UserProfileCard.vue b/src/components/UserProfileCard.vue
index 9aa8a12..3c4e7d1 100644
--- a/src/components/UserProfileCard.vue
+++ b/src/components/UserProfileCard.vue
@@ -144,7 +144,7 @@ const sessionState = ref<SessionState>({
 });
 
 const isLoading = ref(true);
-let sessionRefreshInterval: number | null = null;
+let sessionRefreshInterval: ReturnType<typeof setInterval> | null = null;
 
 
 const userEmail = computed(() => {
diff --git a/vite.config.ts b/vite.config.ts
index c081984..96042fc 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -14,6 +14,20 @@ export default defineConfig(async () => ({
     __SENTRY_ENVIRONMENT__: JSON.stringify(process.env.SENTRY_ENVIRONMENT || 'development'),
   },
   
+  build: {
+    rollupOptions: {
+      output: {
+        manualChunks: {
+          'vendor-vue': ['vue', 'vue-chartjs'],
+          'vendor-sentry': ['@sentry/vue'],
+          'vendor-charts': ['chart.js'],
+          'vendor-tauri': ['@tauri-apps/api', '@tauri-apps/plugin-deep-link', '@tauri-apps/plugin-opener', '@tauri-apps/plugin-process', '@tauri-apps/plugin-updater'],
+          'vendor-posthog': ['posthog-js'],
+        },
+      },
+    },
+    chunkSizeWarningLimit: 600,
+  },
   
   clearScreen: false,