Security Patches & Architecture Refactoring

- Extracted hardware detection logic from firmware.sh into new modules/hw_detect.sh. Declares shared arrays (PCI_NET_DEVS, USB_WIFI_DEVS, etc) and _detect_all_network_devices() function. The main script now sources hw_detect.sh immediately after utils.sh. firmware.sh retains only _DETECTED_FW_PKGS and _FW_PLAN_PKG_LINES plus installation logic — the detection loop is fully removed, eliminating the circular dependency with bluetooth.sh.
- Fixed interrupt safety in main script: removed pkill -f "apt.*install" and pkill -f "dpkg.*configure" from _on_interrupt(); updated exit message to "Temp files cleaned." Only the signal handler (trap _on_interrupt INT TERM) remains.
- Added strict URL validation to modules/gaming/heroic.sh and modules/gaming/tools.sh using regex ^https://[A-Za-z0-9./_-]+\.deb$ before passing $deb_url to _run_cmd. Blocks command substitution, non-https URLs, and path traversal attempts that could bypass shell quoting.
- Implemented real Bullseye Archive rewrite in modules/bullseye/legacy.sh: adds idempotency check (grep -q archive.debian.org && return 0), creates timestamped backup of /etc/apt/sources.list with sudo cp, writes exact archive Debian sources via sudo tee heredoc, and runs sudo apt-get update || true on failure.
- Added local scope to modules/bluetooth.sh variable service_enable_only=false before the conditional assignment, preventing state bleed from the previous global-only declaration.
- Applied safe array pattern (while IFS= read -r _pkg; do ...) across 32+ files in modules/extras/* and modules/bullseye/legacy.sh, replacing all vulnerable for pkg in $cleaned / for pkg in $install_list loops. Eliminates word-splitting and command-injection risks.

modules/firmware.sh

@@ -1,78 +1,11 @@
 #!/usr/bin/env bash
 
 # ── Global arrays ──
-PCI_NET_DEVS=()
-USB_WIFI_DEVS=()
-PCI_BT_DEVS=()
-USB_BT_DEVS=()
+# Device arrays (PCI_NET_DEVS, USB_WIFI_DEVS, PCI_BT_DEVS, USB_BT_DEVS)
+# and _FW_PLAN_HW_LINES are declared in hw_detect.sh.
 _DETECTED_FW_PKGS=()
-_FW_PLAN_HW_LINES=()
 _FW_PLAN_PKG_LINES=()
 
-# ── Network device detection (PCI + USB) ──
-_detect_all_network_devices() {
-    ! is_installed pciutils && _install_pkg pciutils
-    ! is_installed usbutils && _install_pkg usbutils
-
-    PCI_NET_DEVS=()
-    while IFS= read -r line; do
-        PCI_NET_DEVS+=("$line")
-    done < <(echo "$LSPCI_OUTPUT" | grep -iE 'network controller|ethernet controller' || true)
-
-    USB_WIFI_DEVS=()
-    while IFS= read -r line; do
-        # Exclude Bluetooth dongles: many report e.g. "Bluetooth wireless
-        # interface" and would otherwise be classified as WiFi and mapped
-        # to firmware-iwlwifi.
-        if echo "$line" | grep -qiE 'wireless|wifi|802\.11|wlan' &&
-            ! echo "$line" | grep -qi 'bluetooth'; then
-            USB_WIFI_DEVS+=("$line")
-        fi
-    done < <(lsusb 2>/dev/null || true)
-
-    PCI_BT_DEVS=()
-    while IFS= read -r line; do
-        PCI_BT_DEVS+=("$line")
-    done < <(echo "$LSPCI_OUTPUT" | grep -i 'Bluetooth controller' || true)
-
-    USB_BT_DEVS=()
-    while IFS= read -r line; do
-        # All Bluetooth dongles belong here (the WiFi filter above now
-        # excludes anything containing "bluetooth").
-        if echo "$line" | grep -qi 'bluetooth'; then
-            USB_BT_DEVS+=("$line")
-        fi
-    done < <(lsusb 2>/dev/null || true)
-
-    _FW_PLAN_HW_LINES=()
-    for dev in "${PCI_NET_DEVS[@]}"; do
-        local desc dev_type
-        desc=$(echo "$dev" | sed -E 's/^[^ ]+ [^:]+: //; s/ \[[0-9a-fA-F]{4}:[0-9a-fA-F]{4}\]//; s/ \(rev.*\)//')
-        if echo "$dev" | grep -qiE 'network controller|wireless|wi-fi|wlan|802\.11'; then
-            dev_type="WiFi PCI"
-        else
-            dev_type="Ethernet PCI"
-        fi
-        _FW_PLAN_HW_LINES+=("  \xe2\x97\x8f ${desc} (${dev_type})")
-    done
-    for dev in "${USB_WIFI_DEVS[@]}"; do
-        local desc
-        desc=$(echo "$dev" | sed 's/^.*ID //')
-        _FW_PLAN_HW_LINES+=("  \xe2\x97\x8f ${desc} (USB)")
-    done
-
-    for dev in "${PCI_BT_DEVS[@]}"; do
-        local desc
-        desc=$(echo "$dev" | sed -E 's/^[^ ]+ [^:]+: //; s/ \[[0-9a-fA-F]{4}:[0-9a-fA-F]{4}\]//; s/ \(rev.*\)//')
-        _FW_PLAN_HW_LINES+=("  \xe2\x97\x8f ${desc} (Bluetooth PCI)")
-    done
-    for dev in "${USB_BT_DEVS[@]}"; do
-        local desc
-        desc=$(echo "$dev" | sed 's/^.*ID //')
-        _FW_PLAN_HW_LINES+=("  \xe2\x97\x8f ${desc} (Bluetooth USB)")
-    done
-}
-
 # ── Firmware package mapping ──
 _detect_firmware_needs() {
     local -A pkg_info