Broadcom, Utils & Headless Fixes

- Removed dead Broadcom hardware IDs (4357/4358/4360/4727) from `_is_broadcom_b43`, retaining only valid ID 4352 to eliminate false positives in the case statement.
- Added a guard in `_handle_wireless` Level 3 to verify `linux-headers` availability via `apt-cache policy`. Skips DKMS compilation if headers are missing, preventing transaction failures during installation.
- Implemented Broadcom combo card detection (WiFi + Bluetooth) by scanning `PCI_BT_DEVS`. Automatically writes `/etc/modprobe.d/broadcom-combo.conf` with `softdep wl post: btusb` and warns users about potential reboot requirements.
- Enhanced Level 2 (`firmware-b43-installer`) with post-installation validation for `/lib/firmware/b43`. Provides clear recovery instructions via `sudo dpkg-reconfigure firmware-b43-installer` if the directory is empty or missing after installation.
- Created a new helper `_msg_red()` in `utils.sh` to handle critical error messages with colored Whiptail output, replacing standard alerts for migration warnings and failures.
- Updated `repos/migrate.sh` to use `_msg_red()` for branch migration warnings and failure states, ensuring visibility of critical issues while keeping completion messages informative.
- Verified headless mode guards across 16 separate extras files (`office.sh`, `fetch.sh`, `cursors.sh`, etc.), preventing unnecessary package installations on servers without display environments.
- Completed syntax verification (`bash -n`) across all core and extra modules, ensuring no errors in the updated logic for firmware, gaming, swap, or repository management scripts.
- update readme.md

modules/repos/migrate.sh

@@ -62,7 +62,7 @@ _write_deb822_branch() {
 
 _branch_migration() {
     # ── Screen 1: Risk warning ──
-    _msg "WARNING: Branch Migration" \
+    _msg_red "WARNING: Branch Migration" \
 "Migrating from Debian Stable to Testing or SID is a\n\
 MAJOR change and CAN make your system UNBOOTABLE.\n\n\
 Risks include:\n\
@@ -71,7 +71,7 @@ Risks include:\n\
   • Some packages may be removed or replaced\n\
   • SID (unstable) receives NO security updates\n\n\
 A full persistent backup will be saved to /var/backups/\n\
-so you can restore if things go wrong." 16 70 || true
+so you can restore if things go wrong." 16 70
 
     if ! _confirm "Branch Migration" "Do you want to proceed with the migration?"; then
         echo "Migration cancelled."
@@ -89,7 +89,7 @@ so you can restore if things go wrong." 16 70 || true
     plan+="  7. Run: apt autoremove -y\n\n"
     plan+="If apt update fails, the backup is restored immediately."
 
-    _msg "Migration Plan" "$plan" 16 70 || true
+    _msg_red "Migration Plan" "$plan" 16 70
 
     if ! _confirm "Migration Plan" "Proceed with the plan?"; then
         echo "Migration cancelled."
@@ -145,7 +145,7 @@ so you can restore if things go wrong." 16 70 || true
     if ! sudo apt update; then
         echo -e "${RED}apt update failed. Restoring backup...${NC}"
         _restore_backup
-        _msg "Migration Failed" \
+        _msg_red "Migration Failed" \
 "apt update failed. Backup has been restored from:\n\
 $_MIGRATE_BACKUP\n\n\
 Your system should be back to its previous state.\n\