Description

Uppercase/shifted letters are completely ignored in the agent-deck TUI:

1. Shortcuts: M (Move to Group), R (Restart), K/J (Move up/down), F (Fork with options) — none of these trigger
2. Text input: When naming/renaming sessions, uppercase letters are silently dropped or converted to lowercase

Reproduction

1. Start agent-deck TUI
2. Try pressing M on a session -> nothing happens
3. Try pressing R on a session -> nothing happens (lowercase r for rename works)
4. Create or rename a session with uppercase letters -> letters are ignored

Key finding: isolated to the TUI layer

• Inside agent-deck shells (tmux): uppercase works fine
• Inside Claude Code sessions within agent-deck: uppercase works fine
• Only the Bubble Tea TUI itself drops shifted input

This suggests the key event handling in the TUI doesn't correctly process Shift+letter.

Environment

• agent-deck: latest (0.26)
• Terminal: Ghostty
• Compositor: Niri (Wayland)
• Shell: Fish
• OS: CachyOS (Arch-based), Kernel 6.19.6