fix harden hardware detection D3cold freezes

Fixes a critical startup crash on hybrid graphics laptops (e.g., Intel + Nvidia) running fresh Debian installs without proprietary drivers. 

When the secondary GPU enters D3cold power state, kernel-level I/O operations (like `lspci` or reading `/sys/block/`) hang in Uninterruptible Sleep (State D), ignoring standard kill signals and freezing the terminal. Combined with `set -euo pipefail`, these hangs made the script silently fail or enter infinite loops.

Changes:
- Timeout Wrappers: Wrapped all hardware probing commands (`lspci`, `lsblk`, `cat /sys/...`, `ip`, `iwgetid`, `pw-cli`) with `timeout 2` to force-continue if the kernel blocks.
- Pipeline Safety: Added `|| true` to `nvidia-smi` and `dpkg` fallback queries to prevent `pipefail` from killing the script when drivers are missing.
- Loop Hardening: Fixed an infinite loop in `detect_gpu()` where empty `lspci` outputs caused by timeouts would loop forever by adding `[[ -z "$line" ]] && continue`.
- TUI Fallbacks: Added default values for `${LINES:-24}` and `${COLUMNS:-80}` to prevent `set -u` from crashing the `whiptail` menu in restricted shell environments.

modules/extras/system/system.sh

@@ -225,7 +225,7 @@ _cat_general() {
                 fi
                 ;;
             nvme-cli)
-                if ! lsblk -d -o TRAN 2>/dev/null | grep -q "^nvme$"; then
+                if ! timeout 2 lsblk -d -o TRAN 2>/dev/null | grep -q "^nvme$"; then
                     echo "No NVMe controller detected. Skipping."
                     continue
                 fi
@@ -235,7 +235,7 @@ _cat_general() {
                 local nvme_devs=()
                 while read -r dev; do
                     nvme_devs+=("$dev")
-                done < <(lsblk -d -o NAME,TRAN 2>/dev/null | awk '$2 == "nvme" {print $1}')
+                done < <(timeout 2 lsblk -d -o NAME,TRAN 2>/dev/null | awk '$2 == "nvme" {print $1}')
                 if [ ${#nvme_devs[@]} -eq 0 ]; then
                     echo "No NVMe block devices found for health check."
                     continue