refactor(tui): rebuild more closely following bubbletea's conventions

This refactor loses explicit skill activation and path completion which
will be reintroduced at a later date.

Author: lvillani

internal/tui/keymap.go

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+package tui
+
+import "charm.land/bubbles/v2/key"
+
+// keyMap defines the key bindings for the application.
+type keyMap struct {
+	Send     key.Binding
+	Cancel   key.Binding
+	History  key.Binding
+	PickFile key.Binding
+	Quit     key.Binding
+}
+
+// ShortHelp implements the help.KeyMap interface. Returns a slice of bindings to be
+// displayed in the short version of the help. The help bubble will render help in the
+// order in which the help items are returned here.
+func (k keyMap) ShortHelp() []key.Binding {
+	return []key.Binding{k.Send, k.Cancel, k.History, k.PickFile, k.Quit}
+}
+
+// FullHelp implements the help.KeyMap interface. Returns an extended group of help
+// items, grouped by columns. The help bubble will render the help in the order in which
+// the help items are returned here.
+func (k keyMap) FullHelp() [][]key.Binding {
+	return [][]key.Binding{k.ShortHelp()}
+}
+
+// defaultKeyMap returns the default key bindings for the application.
+func defaultKeyMap() keyMap {
+	return keyMap{
+		Send:     key.NewBinding(key.WithKeys("enter"), key.WithHelp("enter", "send")),
+		Cancel:   key.NewBinding(key.WithKeys("esc"), key.WithHelp("esc", "cancel")),
+		History:  key.NewBinding(key.WithKeys("up", "down"), key.WithHelp("↑/↓", "history")),
+		PickFile: key.NewBinding(key.WithKeys("ctrl+p"), key.WithHelp("ctrl+p", "pick file")),
+		Quit:     key.NewBinding(key.WithKeys("ctrl+x"), key.WithHelp("ctrl+x", "quit")),
+	}
+}