System Refactor, GPU & Terminal Overhaul

- Bug Fixes: Rewrote `install_gaming_bullseye()` in `modules/bullseye/legacy.sh` to use a unified `_checklist` flow (matching Debian 12/13) with automatic i386 architecture detection and driver installation. Fixed greetd "Back" menu crash on Debian 11 by adding version-specific conditional logic in `desktop_display.sh`. Corrected ZRAM text overflow in `zram.sh` using `\n` line breaks for terminal wrapping. Updated Kernel Backports warning message in `debianito.sh` to clarify Bullseye limitations.

- Architecture & Repositories: Refactored Debian 11 repository configuration (`configure_repos_bullseye`) to reuse modern submenus (`_repos_enable_components`, `_branch_migration`), eliminating ~44 lines of hardcoded logic and duplicate source list management. Restricted `non-free-firmware` component availability to Debian 12+ in `modules/repos.sh`. Implemented mandatory `apt autoremove -y` and `apt autoclean` execution immediately after enabling non-free/contrib components (`_repos_enable_components`).

- UI & Menus: Added a new "Communication" menu (Option 4) between Internet and Media Players, featuring Signal, Telegram (with Trixie backports warning), and Hexchat. Moved all terminal emulators from System Tools to the "Customization System" -> Terminals submenu (`modules/extras/terminals/terminals.sh`) with version-specific logic (Alacritty 12+, Blackbox/Ptyxis 13+). Added Joplin installer in Office & Productivity for Debian 12/13 only. Integrated Synaptic into Software Centers menu alongside GNOME and Plasma stores. Unified Essential Pack UI across versions, switching between `fastfetch` (Trixie) and `neofetch` (Bookworm/Bullseye).

- Hardware Drivers: Replaced deprecated `install_gpu_drivers()` in `modules/gpu.sh` with `_install_amd_intel_stack()` and `_install_nvidia_stack()`. Implemented specific logic for Debian 13 (Trixie): Blackwell GPUs now enable the official NVIDIA CUDA repository; Maxwell/Pascal on Backports forces a stable kernel path to ensure driver compatibility. Deprecated `install_nvidia_driver()` in favor of new stack functions while preserving global state variables (`NVIDIA_DRIVER_MODE`).

- Utilities & Cleanup: Added `gdebi` and `bleachbit` to System Tools (GUI-only). Standardized menu headers across 15 files using a centralized `SCROLL_HINT` variable. Ensured VLC installation is conditional on headless status checks in Essential Pack modules.

modules/extras.sh

@@ -33,16 +33,17 @@ install_extras() {
             "1" "Customization System" \
             "2" "Download & Network" \
             "3" "Internet (Browsers, Email, VPN)" \
-            "4" "Media Players" \
-            "5" "Multimedia & Design" \
-            "6" "Code Editors & IDEs" \
-            "7" "Servers & Dev Tools" \
-            "8" "Security & Networking" \
-            "9" "Software Centers" \
-            "10" "Office & Productivity" \
-            "11" "System Tools" \
-            "12" "Fetch / System Info" \
-            "13" "Back to main menu")
+            "4" "Communication" \
+            "5" "Media Players" \
+            "6" "Multimedia & Design" \
+            "7" "Code Editors & IDEs" \
+            "8" "Servers & Dev Tools" \
+            "9" "Security & Networking" \
+            "10" "Software Centers" \
+            "11" "Office & Productivity" \
+            "12" "System Tools" \
+            "13" "Fetch / System Info" \
+            "14" "Back to main menu")
 
         [ -z "$cat_choice" ] && return
         clear
@@ -52,16 +53,17 @@ install_extras() {
             1)  _cat_customization ;;
             2)  _cat_download ;;
             3)  _cat_internet ;;
-            4)  _cat_players ;;
-            5)  _cat_design ;;
-            6)  _cat_programming ;;
-            7)  _cat_dev ;;
-            8)  _cat_security ;;
-            9)  _cat_software_centers ;;
-            10) _cat_office ;;
-            11) _cat_general ;;
-            12) _cat_fetch ;;
-            13) return ;;
+            4)  _cat_communication ;;
+            5)  _cat_players ;;
+            6)  _cat_design ;;
+            7)  _cat_programming ;;
+            8)  _cat_dev ;;
+            9)  _cat_security ;;
+            10) _cat_software_centers ;;
+            11) _cat_office ;;
+            12) _cat_general ;;
+            13) _cat_fetch ;;
+            14) return ;;
         esac
         clear
     done