Merge: resolve conflict in routes/backups.js, keep storage-info + maxStorageBytes

dashcaddy-installer/src/main/config-manager.js

@@ -226,17 +226,34 @@ class ConfigManager {
    * @returns {Promise<Object>} Disk space info
    */
   async getDiskSpace(testPath) {
-    // Note: This is a simplified version. In production, you'd use a library like 'check-disk-space'
     try {
-      const stats = await fs.stat(testPath);
-      
+      const fsPromises = require('fs').promises;
+      const pathModule = require('path');
+
+      // Ensure directory exists
+      await fsPromises.mkdir(testPath, { recursive: true });
+
+      // Use statfs for true disk space (works on all filesystems: ext4, Btrfs, XFS, ZFS, APFS, NTFS)
+      const stats = await fsPromises.statfs(testPath);
+
+      const totalBytes = stats.blocks * stats.bsize;
+      const freeBytes = stats.bfree * stats.bsize;
+      const availableBytes = stats.bavail * stats.bsize; // Available to non-root users
+      const usedBytes = totalBytes - freeBytes;
+
       return {
         available: true,
-        path: testPath
+        path: testPath,
+        total: totalBytes,
+        used: usedBytes,
+        free: freeBytes,
+        availableBytes: availableBytes,
+        usagePercent: parseFloat(((usedBytes / totalBytes) * 100).toFixed(2))
       };
     } catch (error) {
       return {
         available: false,
+        path: testPath,
         error: error.message
       };
     }