fix bug and version check

public/sw.js

@@ -1,5 +1,5 @@
-const CACHE_NAME = 'greenhome-v2';
-const STATIC_CACHE_NAME = 'greenhome-static-v2';
+const CACHE_NAME = 'greenhome-1766074058129';
+const STATIC_CACHE_NAME = 'greenhome-static-1766074058129';
 
 // Static assets to cache on install
 const STATIC_FILES_TO_CACHE = [
@@ -32,7 +32,8 @@ self.addEventListener('install', (event) => {
       } catch (error) {
         console.log('Some static files failed to cache:', error);
       }
-      await self.skipWaiting();
+      // Don't skip waiting automatically - let user decide when to update
+      // await self.skipWaiting();
     })()
   );
 });
@@ -53,6 +54,20 @@ self.addEventListener('activate', (event) => {
   );
 });
 
+// Listen for messages from clients (e.g., when user clicks update button)
+self.addEventListener('message', (event) => {
+  if (event.data && event.data.type === 'SKIP_WAITING') {
+    self.skipWaiting().then(() => {
+      // Notify all clients about update
+      return self.clients.matchAll();
+    }).then((clients) => {
+      clients.forEach((client) => {
+        client.postMessage({ type: 'SW_UPDATED' });
+      });
+    });
+  }
+});
+
 self.addEventListener('fetch', (event) => {
   const { request } = event;
   const url = new URL(request.url);

public/version.json

@@ -0,0 +1,3 @@
+{
+  "version": "1766074058129"
+}