DisableKittyKeyboard pushes mode 0 instead of popping, breaks capitals on Ghostty

[MikeMikeLeeLee]

Bug

Can't type capital letters on the dashboard when using Ghostty terminal.

Root cause

DisableKittyKeyboard in internal/ui/keyboard_compat.go sends ESC[>0u (push Kitty mode 0). On Ghostty, pushing any mode onto the Kitty stack activates CSI u encoding. Bubble Tea v1.3.10 doesn't parse CSI u sequences (they become unknownCSISequenceMsg), so shifted keys are silently dropped.

Fix

Change push to pop in DisableKittyKeyboard:

// Before (breaks Ghostty):
_, _ = io.WriteString(w, "\x1b[>0u")   // Push mode 0

// After (works):
_, _ = io.WriteString(w, "\x1b[<u")    // Pop mode (no-op if stack empty)

Pop is safe -- if nothing was on the stack, it's a no-op. If something was pushed by another app, it restores the previous state.

Steps to reproduce

1. Open agent-deck in Ghostty terminal
2. Try typing a capital letter on the dashboard (e.g. Shift+A in a text field)
3. Nothing appears

Environment

• Terminal: Ghostty
• OS: macOS
• Bubble Tea: v1.3.10