Electron App: Keyboard shortcuts & help

[jongio]

Overview

Full keyboard shortcut support matching TUI keybindings, help modal, and global hotkey.

Acceptance Criteria

• All TUI keybindings mapped (see keyMap in keys.go)
• Navigation: ↑/k, ↓/j, ←, →, Enter, Space, Escape
• Launch: Enter (in-place), t (tab), w (window), e (pane), L (multi)
• Search: / (focus), Escape (clear)
• View: p (preview), v (plan), o (conversation sort), ? (help), , (settings)
• Filter: f (directory), 1-4 (time range), Tab (pivot), ! (attention), s/S (sort)
• Actions: h (hide), H (toggle hidden), * (star), c (copy ID), y (copy preview)
• Selection: Space (toggle), a (select all), d (deselect all), Shift+↑/↓ (range)
• Help modal ('?' key): two-column grouped display of all shortcuts
• Global hotkey: configurable system-wide shortcut to show/hide dispatch window
• Shortcut hints in status bar (context-sensitive)
• No conflicts with system shortcuts (Ctrl+C = copy, not quit)

Implementation

• Use tinykeys library for shortcut registration
• Global hotkey via electron globalShortcut API
• Shortcuts disabled when modals/inputs are focused
• Customizable shortcuts (future: stored in config)