Standardize exit codes and behaviors

Adjust exit codes and abort handling across multiple PVE helper scripts to provide clearer outcomes for automation and interactive flows. Changes include:

- container-restore-from-backup.sh, core-restore-from-backup.sh: return 235 when no backups found (was 1).
- fstrim.sh: treat user cancellation of non-ext4 warning as non-error (exit 0 instead of 1).
- kernel-clean.sh: treat no selection or user abort as non-error (exit 0 instead of 1).
- lxc-delete.sh: return 234 when no containers are present; treat no selection as non-error (exit 0).
- nic-offloading-fix.sh: use specific non-zero codes for root check and tool install failures (exit 104, 237) and 236 when no matching interfaces (was 1).
- pbs_microcode.sh, post-pmg-install.sh, post-pbs-install.sh: use distinct exit codes (232 and 105) for detected VM/PVE/unsupported distro conditions instead of generic 1.

These modifications make scripts return distinct codes for different failure modes and ensure user-initiated aborts or benign conditions exit with 0 where appropriate.

tools/pve/container-restore-from-backup.sh

@@ -62,7 +62,7 @@ function msg_error() {
 }
 if [ -z "$(ls -A /var/lib/docker/volumes/hass_config/_data/backups/)" ]; then
   msg_error "No backups found! \n"
-  exit 1
+  exit 235
 fi
 DIR=/var/lib/docker/volumes/hass_config/_data/restore
 if [ -d "$DIR" ]; then

tools/pve/core-restore-from-backup.sh

@@ -62,7 +62,7 @@ function msg_error() {
 }
 if [ -z "$(ls -A /root/.homeassistant/backups/)" ]; then
   msg_error "No backups found! \n"
-  exit 1
+  exit 235
 fi
 DIR=/root/.homeassistant/restore
 if [ -d "$DIR" ]; then

tools/pve/fstrim.sh

@@ -39,7 +39,7 @@ ROOT_FS=$(df -Th "/" | awk 'NR==2 {print $2}')
 if [ "$ROOT_FS" != "ext4" ]; then
   whiptail --backtitle "Proxmox VE Helper Scripts" \
     --title "Warning" \
-    --yesno "Root filesystem is not ext4 ($ROOT_FS).\nContinue anyway?" 12 80 || exit 1
+    --yesno "Root filesystem is not ext4 ($ROOT_FS).\nContinue anyway?" 12 80 || exit 0
 fi
 
 NODE=$(hostname)

tools/pve/kernel-clean.sh

@@ -57,7 +57,7 @@ done
 
 if [ ${#kernels_to_remove[@]} -eq 0 ]; then
   echo -e "${RD}No valid selection made. Exiting.${CL}"
-  exit 1
+  exit 0
 fi
 
 # Confirm removal
@@ -66,7 +66,7 @@ printf "%s\n" "${kernels_to_remove[@]}"
 read -rp "Proceed with removal? (y/n): " confirm
 if [[ "$confirm" != "y" ]]; then
   echo -e "${RD}Aborted.${CL}"
-  exit 1
+  exit 0
 fi
 
 # Remove kernels

tools/pve/lxc-delete.sh

@@ -51,7 +51,7 @@ containers=$(pct list | tail -n +2 | awk '{print $0 " " $4}')
 
 if [ -z "$containers" ]; then
   whiptail --title "LXC Container Delete" --msgbox "No LXC containers available!" 10 60
-  exit 1
+  exit 234
 fi
 
 menu_items=("ALL" "Delete ALL containers" "OFF") # Add as first option
@@ -72,7 +72,7 @@ CHOICES=$(whiptail --title "LXC Container Delete" \
 if [ -z "$CHOICES" ]; then
   whiptail --title "LXC Container Delete" \
     --msgbox "No containers selected!" 10 60
-  exit 1
+  exit 0
 fi
 
 read -p "Delete containers manually or automatically? (Default: manual) m/a: " DELETE_MODE

tools/pve/nic-offloading-fix.sh

@@ -47,7 +47,7 @@ function msg_warn() { echo -e "${WARN} ${YWB}${1}"; }
 # Check for root privileges
 if [ "$(id -u)" -ne 0 ]; then
   msg_error "Error: This script must be run as root."
-  exit 1
+  exit 104
 fi
 
 if ! command -v ethtool >/dev/null 2>&1; then
@@ -55,7 +55,7 @@ if ! command -v ethtool >/dev/null 2>&1; then
   apt-get update &>/dev/null
   apt-get install -y ethtool &>/dev/null || {
     msg_error "Failed to install ethtool. Exiting."
-    exit 1
+    exit 237
   }
   msg_ok "ethtool installed successfully"
 fi
@@ -86,7 +86,7 @@ done
 if [ ${#INTERFACES[@]} -eq 0 ]; then
   whiptail --title "Error" --msgbox "No Intel e1000e or e1000 network interfaces found!" 10 60
   msg_error "No Intel e1000e or e1000 network interfaces found! Exiting."
-  exit 1
+  exit 236
 fi
 
 msg_ok "Found ${BL}$COUNT${GN} Intel e1000e/e1000 interfaces"

tools/pve/pbs_microcode.sh

@@ -41,7 +41,7 @@ header_info
 virt=$(systemd-detect-virt)
 if [ "$virt" != "none" ]; then
   msg_error "This script must be run on bare metal. Detected virtual environment: $virt"
-  exit 1
+  exit 232
 fi
 
 # Attempt to obtain the current loaded microcode revision

tools/pve/post-pbs-install.sh

@@ -83,7 +83,7 @@ main() {
 
   if command -v pveversion >/dev/null 2>&1; then
     echo -e "\n🛑  PVE Detected, Wrong Script!\n"
-    exit 1
+    exit 232
   fi
 
   local CODENAME
@@ -95,7 +95,7 @@ main() {
   *)
     msg_error "Unsupported Debian codename: $CODENAME"
     echo -e "Supported: bookworm (PBS 3.x) and trixie (PBS 4.x)"
-    exit 1
+    exit 105
     ;;
   esac
 }

tools/pve/post-pmg-install.sh

@@ -49,7 +49,7 @@ declare -f init_tool_telemetry &>/dev/null && init_tool_telemetry "post-pmg-inst
 
 if ! grep -q "Proxmox Mail Gateway" /etc/issue 2>/dev/null; then
   msg_error "This script is only intended for Proxmox Mail Gateway"
-  exit 1
+  exit 232
 fi
 
 repo_state() {