Keyboard confusion

Relevant files:

• /opt/rise-of-pi/herm-tui/src/components/VirtualKeyboard.tsx
• /opt/rise-of-pi/herm-tui/src/app.tsx
• rg40xxv/ports/hermes.gptk
• rg40xxv/ports/herms_sdl_client.py

Current intended mappings:

• D-pad: navigate
• A: select/enter
• B: escape/back
• X: space
• Y: backspace/delete
• L1: chips/tab
• R1: symbols/F2
• Select: F11/open keyboard
• Start: F12/send
• Start+Select held: exit SDL client

The UI text is too compressed and not self-evident. The RG experience needs an always-visible compact help strip and a keyboard state that makes “press Start to send” obvious.