Fix variable quoting in disk iteration loops

Replace unsafe for loops with properly quoted while loops when
iterating over disk devices. This prevents word splitting issues
with device names containing special characters.

#17

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

proxDoc.sh

@@ -102,10 +102,11 @@ get_temp_info() {
 get_disk_health() {
     echo -e "\n${GREEN}=== Disk Health Status ===${NC}"
     if command -v smartctl >/dev/null 2>&1; then
-        for disk in $(lsblk -d -o name | grep -E '^sd|^nvme'); do
+        while IFS= read -r disk; do
+            [[ -z "$disk" ]] && continue
             echo -e "\nChecking /dev/$disk:"
-            smartctl -H /dev/$disk
-        done
+            smartctl -H "/dev/$disk"
+        done < <(lsblk -d -o name | grep -E '^sd|^nvme')
     else
         log_message warn "smartctl not found. Install smartmontools for disk health monitoring"
     fi
@@ -480,12 +481,13 @@ quick_health_check() {
     # Disk health (quick)
     echo -e "\n${GREEN}=== Disk Health Summary ===${NC}"
     if command -v smartctl >/dev/null 2>&1; then
-        for disk in $(lsblk -d -o name | grep -E '^sd|^nvme'); do
-            health=$(smartctl -H /dev/$disk 2>/dev/null | grep -i "health" | awk -F: '{print $2}' | xargs)
+        while IFS= read -r disk; do
+            [[ -z "$disk" ]] && continue
+            health=$(smartctl -H "/dev/$disk" 2>/dev/null | grep -i "health" | awk -F: '{print $2}' | xargs)
             if [[ -n "$health" ]]; then
                 echo -e "/dev/$disk: $health"
             fi
-        done
+        done < <(lsblk -d -o name | grep -E '^sd|^nvme')
     fi
 
     # Node Exporter