[BUG] Arrow keys and Escape not working in Kitty/Ghostty terminals (CSI u keyboard protocol issue)

[fanorama]

When using Factory Droid CLI in Kitty terminal, arrow keys and Escape key don't work
properly. Instead of functioning normally:

• Arrow keys output: 9A, 9B, 9C, 9D
• Escape key outputs: 9u

Environment:
• OS: Arch Linux (linux 6.17.9-arch1-1)
• Terminal: Kitty (also affects Ghostty)
• Factory CLI version: [your version]

Expected behavior:
Arrow keys should navigate and Escape should cancel/exit as expected.

Actual behavior:
Keys output raw CSI u escape sequence characters instead of being interpreted correctly.

Root cause:
Kitty use the modern "CSI u" (fixterms/libtermkey) keyboard protocol for unambiguous key
reporting. Factory CLI's terminal input handling library doesn't properly detect or handle these
sequences.

Workarounds attempted (unsuccessful):
• Setting TERM=xterm-256color
• Adding keyboard_protocol none to kitty.conf

Reference:
This is the same issue that affected Gemini CLI and was fixed in v0.18.2:
google-gemini/gemini-cli#7921