amd gcn legacy support & kernel overhaul

- Fixed Mesa 32-bit dependency conflicts by removing mesa-va-drivers from gaming setup; mesa-libgallium now includes VA-API for Mesa >= 25.3.3, resolving solver errors with backports (Mesa 26.x).
- Removed corectrl detection and installation from AMD tools in gpu/amd_intel.sh (retained in System Tools checklist only).
- Added zutty terminal emulator option alongside alacritty for Debian 12+ in terminals.sh.
- Overhauled Kernel menu: replaced "Backports Kernel" with "Kernel" submenu offering Stable, RT, Cloud, and Backports options; removed hardcoded Debian 11 restriction (backports hidden only on Bullseye); headers now installed automatically with all kernel variants; NVIDIA warnings added for Backports (DKMS required) and RT (driver compatibility note).
- Implemented AMD GCN legacy driver migration: is_amd_legacy_gcn() function detects GCN 1.0/1.1 GPUs via whitelist of 85 PCI IDs; offers user prompt to force amdgpu module with GRUB parameters (radeon.si_support=0, radeon.cik_support=0, amdgpu.si_support=1, amdgpu.cik_support=1); safe sed-based injection into GRUB_CMDLINE_LINUX_DEFAULT with backup and idempotency check.
- Standardized UI across 27 checklist locations: unified text to "Check [*] the packages you want installed/updated on your system."; removed SCROLL_HINT variable entirely from all code; changed OK button to "Apply" in _checklist() and _inputbox() only (not in _msg/_menu).
- Reordered gaming menu checklists: i386 moved to top position, steam/mangohud positioned immediately after for better dependency flow.
- Enhanced kernel installation prompts: all variants (Stable, RT, Cloud, Backports) now display candidate version numbers in parentheses using apt-cache policy and madison queries.
- update readme

modules/gaming.sh

@@ -52,17 +52,17 @@ install_gaming() {
     # 1. Single checklist with ALL options (including i386 toggle)
     local choices
     choices=$(_checklist "Gaming Setup" \
-        "Select gaming packages to install${SCROLL_HINT}:" $TUI_ALTO $TUI_ANCHO $TUI_ALTO_LISTA \
+        "Check [*] the packages you want installed/updated on your system.\n" $TUI_ALTO $TUI_ANCHO $TUI_ALTO_LISTA \
+        "i386"     "Enable 32-bit (i386) architecture" ON \
         "steam"    "Steam (requires 32-bit support)" ON \
-        "gamemode" "Game performance optimization" OFF \
         "mangohud" "Performance overlay (Vulkan/OpenGL)" ON \
+        "gamemode" "Game performance optimization" OFF \
         "goverlay" "MangoHud config GUI" ON \
         "heroic"   "Heroic Launcher (Epic/GOG)" OFF \
         "java"     "Minecraft Java Runtime" OFF \
         "openrgb"  "OpenRGB (RGB lighting control)" OFF \
         "lutris"   "Lutris + Wine (requires 32-bit support)" OFF \
-        "retroarch" "RetroArch Emulator Frontend" OFF \
-        "i386"     "Enable 32-bit (i386) architecture" ON)
+        "retroarch" "RetroArch Emulator Frontend" OFF)
 
     if [ -z "$choices" ]; then
         echo "No gaming packages selected."