fix(tui): fix GPU panel row showing AMD chipset devices, clear screen before TUI

isGPUDevice matched all AMD vendor PCIe devices (SATA, crypto coprocessors,
PCIe dummies) because of a broad strings.Contains(vendor,"amd") check.
Remove it — AMD Instinct/Radeon GPUs are caught by ProcessingAccelerator /
DisplayController class. Also exclude ASPEED (BMC VGA adapter).

Add clear before bee-tui to avoid dirty terminal output.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

iso/overlay/usr/local/bin/bee-tui

@@ -1,5 +1,7 @@
 #!/bin/sh
 
+clear
+
 if [ "$(id -u)" -ne 0 ]; then
     exec sudo -n /usr/local/bin/bee tui --runtime livecd "$@"
 fi