firmware & wireless refactor + extrepo Migration

- Created standalone modules/bluetooth.sh  for `_install_bluetooth_stack()` with desktop-aware frontend selection (bluedevil/KDE, blueman/XFCE/other). Extracted from `firmware.sh`, reducing it from 438 to 369 lines.

- Added `detect_desktop_environment()` and `detect_audio_server()` functions in `utils.sh` with new globals `DESKTOP_ENV=""` and `AUDIO_SERVER=""`.

- New `found_active_wifi` flag detects Qualcomm Atheros AR9485 PCI chips without loaded firmware, displaying `(no driver — install firmware)` instead of silently disappearing. Auto-installs `firmware-atheros + firmware-linux-nonfree` after Firmware & Wireless Setup.

- New `is_nvidia_blackwell()` detects GPUs in ranges `0x2900–0x29BF` and `0x2B80–0x31FF`. Added `_enable_cuda_repo()` helper for extrepo-based CUDA installation with APT pinning. DKMS verification blocks added to all `_install_nvidia_*` functions.

- Standardized repository enablement across 7 modules using `_enable_*_repo()` helpers:
  - `internet.sh`: Firefox/Floorp/LibreWolf, Pale Moon, Tailscale, Mullvad VPN/Browser, ProtonVPN
  - `jellyfin.sh`, `programming.sh` (VSCodium), `java.sh` (Temurin)
  - New `extras/office/office.sh`: OnlyOffice + LibreOffice with language detection

- The main script was reduced from 233 to 137 lines. Created new `modules/sysinfo.sh` (97 lines) for `_show_sysinfo()`. Source chain: `utils.sh → sysinfo.sh → sudo_config.sh → repos → firmware.sh → bluetooth.sh → gpu.sh → kernel.sh → gaming.sh → extras.sh → zram.sh → java.sh`.

- Renamed menu to `"Firmware, Wireless & Bluetooth"`. Translated NTP dialog (English), basic programs install message, and NVIDIA 32-bit legacy messages.

modules/bullseye/legacy.sh

@@ -95,16 +95,29 @@ install_nvidia_bullseye() {
         local nv32_ver
         nv32_ver=$(apt-cache policy "$nv32_pkg" 2>/dev/null | awk 'NR==3 {print $2; exit}')
         if [ -n "$nv32_ver" ] && [ "$nv32_ver" != "(none)" ]; then
-            echo "Instalando compatibilidad 32-bit para ${nv_pkg}..."
+            echo "Installing 32-bit compatibility for ${nv_pkg}..."
             _run_cmd "NVIDIA 32-bit" "sudo apt install -y $nv32_pkg" \
-                "Instalando librerías NVIDIA 32-bit..."
+                "Installing NVIDIA 32-bit libraries..."
         else
-            echo "No hay paquete 32-bit disponible para ${nv_pkg} en Bullseye."
+            echo "No 32-bit compatibility package available for ${nv_pkg} on Bullseye."
         fi
     fi
 
     NVIDIA_DRIVER_MODE="stable"
     echo -e "${GREEN}Driver NVIDIA ${nv_pkg} instalado. Requiere reinicio.${NC}"
+
+    echo ""
+    echo "──────────────────────────────────────────────"
+    echo "Verifying DKMS module compilation:"
+    if command -v dkms &>/dev/null; then
+        dkms status 2>/dev/null | grep nvidia || echo "(no nvidia DKMS module found)"
+    else
+        echo "(dkms not installed)"
+    fi
+    echo ""
+    echo "If the line ends with 'installed' → module is OK."
+    echo "Otherwise check: dmesg | grep nvidia"
+    echo "──────────────────────────────────────────────"
 }
 
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