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/extras/programming/programming.sh

@@ -35,7 +35,7 @@ _cat_programming() {
         "gedit"              "GNOME text editor$(_inst gedit)"                            "$gedit_state" \
         "geany"              "Lightweight IDE$(_inst geany)"                              "$geany_state" \
         "gnome-text-editor"  "GNOME modern text editor$(_inst gnome-text-editor)"       "$gte_state" \
-        "vscodium"           "VS Code open-source (external repo)$(_inst codium)"       "$codium_state" \
+        "vscodium"           "VS Code open-source (extrepo)$(_inst codium)"              "$codium_state" \
         3>&1 1>&2 2>&3)
     clear
 
@@ -65,41 +65,23 @@ _cat_programming() {
     echo -e "${GREEN}Programming applications installed.${NC}"
 }
 
+_enable_vscodium_repo() {
+    if [ ! -f /etc/apt/sources.list.d/extrepo_vscodium.sources ]; then
+        if ! command -v extrepo &>/dev/null; then
+            _run_cmd "extrepo" "sudo apt install -y extrepo" "Installing extrepo..."
+        fi
+        _run_cmd "VSCodium" "sudo extrepo enable vscodium" "Enabling VSCodium repository..."
+    fi
+    _run_cmd "APT Update" "sudo apt update" "Updating package lists..."
+}
+
 install_vscodium() {
     if command -v codium &>/dev/null; then
         echo "VSCodium is already installed."
         return
     fi
 
-    echo "Setting up VSCodium repository..."
-
-    ! is_installed "wget" && _run_install wget
-    ! is_installed "gpg" && _run_install gpg
-
-    sudo install -d -m 0755 /usr/share/keyrings
-
-    wget -qO - https://gitlab.com/paulcarroty/vscodium-deb-rpm-repo/raw/master/pub.gpg \
-        | gpg --dearmor \
-        | sudo dd of=/usr/share/keyrings/vscodium-archive-keyring.gpg 2>/dev/null
-
-    local use_deb822=false
-    [ -f /etc/apt/sources.list.d/debian.sources ] && use_deb822=true
-
-    if $use_deb822; then
-        sudo tee /etc/apt/sources.list.d/vscodium.sources > /dev/null << 'EOF'
-Types: deb
-URIs: https://download.vscodium.com/debs
-Suites: vscodium
-Components: main
-Architectures: amd64 arm64
-Signed-by: /usr/share/keyrings/vscodium-archive-keyring.gpg
-EOF
-    else
-        echo "deb [arch=amd64,arm64 signed-by=/usr/share/keyrings/vscodium-archive-keyring.gpg] https://download.vscodium.com/debs vscodium main" \
-            | sudo tee /etc/apt/sources.list.d/vscodium.list > /dev/null
-    fi
-
-    _run_cmd "APT Update" "sudo apt update" "Updating package lists..."
+    _enable_vscodium_repo
     _run_install codium
 
     echo -e "${GREEN}VSCodium installed.${NC}"