Fixed Arrow Key not working on ghostty and kitty (mostly when Num lock or Caps Lock is on )

[streamtechteam]

TLDR

Based on gemini cli code , I fixed arrow keys problem in ghostty and kitty terminals

Now enabling num lock or caps lock doesnt make any diffrence and everything works fine

Dive Deeper

• Add prefix “peel-and-continue” parser to consume one complete sequence at a time, preventing buffer overflow and stray fragments
• Support parameterized functional keys ESC[1;NmX]:
• Arrows A/B/C/D → up/down/right/left
• Home/End H/F → home/end
• F1–F4 P/Q/R/S → f1/f2/f3/f4
• Handle reverse Tab as Shift+Tab:
• Legacy ESC[Z
• Parameterized ESC[1;2Z
• Accept legacy arrows ESC[A/B/C/D] when Kitty is enabled (no modifiers).
• Map tilde-coded CSI sequences (ESC[~):
• 1 → home, 2 → insert, 3 → delete, 4 → end, 5 → pageup, 6 → pagedown
• Fixes spillage like “9~” on Delete by consuming the full sequence.
• Raise MAX_KITTY_SEQUENCE_LENGTH from 12 → 32.
• Normalize modifiers when “event types” bit is set (>=128) and introduce named bit constants:
• MODIFIER_SHIFT_BIT, MODIFIER_ALT_BIT, MODIFIER_CTRL_BIT
• Improve readability: symbol→name lookup table and inline regex comments.

Reviewer Test Plan

1. Run test suite
2. Recreate using user setups from Arrow keys not working in kitty #580

Testing Matrix

	🍏	🪟	🐧
npm run	❓	❓	✅
npx	❓	❓	❓
Docker	❓	❓	❓
Podman	❓	-	-
Seatbelt	❓	-	-

Linked issues / bugs

#580