fix: resolve multiple production issues

- Fix archive page showing "00" instead of "0" for empty photo counts
- Fix email queue PostgreSQL "updated_at" column error with migration and fallback
- Fix storage calculation discrepancies between system status and archive pages
- Add proper storage info to system status endpoint
- Fix archive path concatenation in settings endpoint

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

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

backend/src/routes/adminSystem.js

@@ -4,6 +4,7 @@ const { adminAuth } = require('../middleware/auth-enhanced-v2');
 const fs = require('fs').promises;
 const path = require('path');
 const os = require('os');
+const { formatBoolean } = require('../utils/dbCompat');
 const router = express.Router();
 
 // Get system version
@@ -75,6 +76,32 @@ router.get('/status', adminAuth, async (req, res) => {
     // Activity logs count
     const [activityCount] = await db('activity_logs').count('* as count');
     
+    // Storage info
+    const [{ totalPhotoStorage }] = await db('photos')
+      .sum('size_bytes as totalPhotoStorage');
+
+    const archives = await db('events')
+      .where('is_archived', formatBoolean(true))
+      .whereNotNull('archive_path')
+      .select('archive_path');
+
+    let archiveStorage = 0;
+    const storagePath = process.env.STORAGE_PATH || path.join(__dirname, '../../../storage');
+    
+    for (const archive of archives) {
+      if (archive.archive_path) {
+        try {
+          const fullArchivePath = path.join(storagePath, archive.archive_path);
+          const stats = await fs.stat(fullArchivePath);
+          archiveStorage += stats.size;
+        } catch (error) {
+          console.error('Archive file not found:', archive.archive_path);
+        }
+      }
+    }
+
+    const totalStorage = (parseInt(totalPhotoStorage) || 0) + archiveStorage;
+    
     // System info
     const systemInfo = {
       platform: os.platform(),
@@ -105,6 +132,11 @@ router.get('/status', adminAuth, async (req, res) => {
           activityLogs: activityCount.count
         }
       },
+      storage: {
+        totalUsed: totalStorage,
+        photoStorage: parseInt(totalPhotoStorage) || 0,
+        archiveStorage: archiveStorage
+      },
       emailQueue: {
         pending: pendingEmails.count,
         sent: sentEmails.count,