feat: implement comprehensive PWA force update system

- Add UpdateManager and UpdateChecker for automatic version detection
- Add post-build script for meta.json generation and version injection
- Enhance Service Worker with version-aware caching
- Add .htaccess configuration for proper cache control

This ensures all users receive the latest version after deployment
without manual cache clearing.

scripts/purge-cloudflare-cache.js

@@ -0,0 +1,94 @@
+/**
+ * Скрипт для очистки кеша Cloudflare после деплоя
+ * 
+ * Использование:
+ * CLOUDFLARE_API_TOKEN=your_token CLOUDFLARE_ZONE_ID=your_zone_id node scripts/purge-cloudflare-cache.js
+ */
+
+const https = require('https');
+
+const API_TOKEN = process.env.CLOUDFLARE_API_TOKEN;
+const ZONE_ID = process.env.CLOUDFLARE_ZONE_ID;
+const DOMAIN = process.env.CLOUDFLARE_DOMAIN || 'securebit.chat';
+
+if (!API_TOKEN || !ZONE_ID) {
+    console.error('❌ Missing required environment variables:');
+    console.error('   CLOUDFLARE_API_TOKEN - Cloudflare API Token');
+    console.error('   CLOUDFLARE_ZONE_ID - Cloudflare Zone ID');
+    process.exit(1);
+}
+
+// Критичные файлы для очистки
+const CRITICAL_FILES = [
+    `https://${DOMAIN}/meta.json`,
+    `https://${DOMAIN}/index.html`,
+    `https://${DOMAIN}/sw.js`,
+    `https://${DOMAIN}/manifest.json`
+];
+
+async function purgeCache(files) {
+    return new Promise((resolve, reject) => {
+        const data = JSON.stringify({
+            files: files
+        });
+
+        const options = {
+            hostname: 'api.cloudflare.com',
+            port: 443,
+            path: `/client/v4/zones/${ZONE_ID}/purge_cache`,
+            method: 'POST',
+            headers: {
+                'Authorization': `Bearer ${API_TOKEN}`,
+                'Content-Type': 'application/json',
+                'Content-Length': data.length
+            }
+        };
+
+        const req = https.request(options, (res) => {
+            let responseData = '';
+
+            res.on('data', (chunk) => {
+                responseData += chunk;
+            });
+
+            res.on('end', () => {
+                if (res.statusCode === 200) {
+                    const result = JSON.parse(responseData);
+                    if (result.success) {
+                        resolve(result);
+                    } else {
+                        reject(new Error(JSON.stringify(result.errors)));
+                    }
+                } else {
+                    reject(new Error(`HTTP ${res.statusCode}: ${responseData}`));
+                }
+            });
+        });
+
+        req.on('error', (error) => {
+            reject(error);
+        });
+
+        req.write(data);
+        req.end();
+    });
+}
+
+async function main() {
+    console.log('🔄 Purging Cloudflare cache...');
+    console.log(`   Zone ID: ${ZONE_ID}`);
+    console.log(`   Domain: ${DOMAIN}`);
+    console.log(`   Files: ${CRITICAL_FILES.length}`);
+
+    try {
+        const result = await purgeCache(CRITICAL_FILES);
+        console.log('✅ Cache purged successfully');
+        console.log(`   Purged files: ${result.result.files?.length || 0}`);
+    } catch (error) {
+        console.error('❌ Failed to purge cache:', error.message);
+        process.exit(1);
+    }
+}
+
+main();
+