feat: Add tools dialog accessible via F9 (#24)

* Add tools dialog

* Remove sorting and double items

* Update key handling

internal/tui/components/dialog/tools.go

@@ -0,0 +1,178 @@
+package dialog
+
+import (
+	"github.com/charmbracelet/bubbles/key"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+	utilComponents "github.com/sst/opencode/internal/tui/components/util"
+	"github.com/sst/opencode/internal/tui/layout"
+	"github.com/sst/opencode/internal/tui/styles"
+	"github.com/sst/opencode/internal/tui/theme"
+)
+
+const (
+	maxToolsDialogWidth = 60
+	maxVisibleTools     = 15
+)
+
+// ToolsDialog interface for the tools list dialog
+type ToolsDialog interface {
+	tea.Model
+	layout.Bindings
+	SetTools(tools []string)
+}
+
+// ShowToolsDialogMsg is sent to show the tools dialog
+type ShowToolsDialogMsg struct {
+	Show bool
+}
+
+// CloseToolsDialogMsg is sent when the tools dialog is closed
+type CloseToolsDialogMsg struct{}
+
+type toolItem struct {
+	name string
+}
+
+func (t toolItem) Render(selected bool, width int) string {
+	th := theme.CurrentTheme()
+	baseStyle := styles.BaseStyle().
+		Width(width).
+		Background(th.Background())
+	
+	if selected {
+		baseStyle = baseStyle.
+			Background(th.Primary()).
+			Foreground(th.Background()).
+			Bold(true)
+	} else {
+		baseStyle = baseStyle.
+			Foreground(th.Text())
+	}
+	
+	return baseStyle.Render(t.name)
+}
+
+type toolsDialogCmp struct {
+	tools       []toolItem
+	width       int
+	height      int
+	list        utilComponents.SimpleList[toolItem]
+}
+
+type toolsKeyMap struct {
+	Up     key.Binding
+	Down   key.Binding
+	Escape key.Binding
+	J      key.Binding
+	K      key.Binding
+}
+
+var toolsKeys = toolsKeyMap{
+	Up: key.NewBinding(
+		key.WithKeys("up"),
+		key.WithHelp("↑", "previous tool"),
+	),
+	Down: key.NewBinding(
+		key.WithKeys("down"),
+		key.WithHelp("↓", "next tool"),
+	),
+	Escape: key.NewBinding(
+		key.WithKeys("esc"),
+		key.WithHelp("esc", "close"),
+	),
+	J: key.NewBinding(
+		key.WithKeys("j"),
+		key.WithHelp("j", "next tool"),
+	),
+	K: key.NewBinding(
+		key.WithKeys("k"),
+		key.WithHelp("k", "previous tool"),
+	),
+}
+
+func (m *toolsDialogCmp) Init() tea.Cmd {
+	return nil
+}
+
+func (m *toolsDialogCmp) SetTools(tools []string) {
+	var toolItems []toolItem
+	for _, name := range tools {
+		toolItems = append(toolItems, toolItem{name: name})
+	}
+	
+	m.tools = toolItems
+	m.list.SetItems(toolItems)
+}
+
+func (m *toolsDialogCmp) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch {
+		case key.Matches(msg, toolsKeys.Escape):
+			return m, func() tea.Msg { return CloseToolsDialogMsg{} }
+		// Pass other key messages to the list component
+		default:
+			var cmd tea.Cmd
+			listModel, cmd := m.list.Update(msg)
+			m.list = listModel.(utilComponents.SimpleList[toolItem])
+			return m, cmd
+		}
+	case tea.WindowSizeMsg:
+		m.width = msg.Width
+		m.height = msg.Height
+	}
+
+	// For non-key messages
+	var cmd tea.Cmd
+	listModel, cmd := m.list.Update(msg)
+	m.list = listModel.(utilComponents.SimpleList[toolItem])
+	return m, cmd
+}
+
+func (m *toolsDialogCmp) View() string {
+	t := theme.CurrentTheme()
+	baseStyle := styles.BaseStyle().Background(t.Background())
+
+	title := baseStyle.
+		Foreground(t.Primary()).
+		Bold(true).
+		Width(maxToolsDialogWidth).
+		Padding(0, 0, 1).
+		Render("Available Tools")
+
+	// Calculate dialog width based on content
+	dialogWidth := min(maxToolsDialogWidth, m.width/2)
+	m.list.SetMaxWidth(dialogWidth)
+	
+	content := lipgloss.JoinVertical(
+		lipgloss.Left,
+		title,
+		m.list.View(),
+	)
+
+	return baseStyle.Padding(1, 2).
+		Border(lipgloss.RoundedBorder()).
+		BorderBackground(t.Background()).
+		BorderForeground(t.TextMuted()).
+		Background(t.Background()).
+		Width(lipgloss.Width(content) + 4).
+		Render(content)
+}
+
+func (m *toolsDialogCmp) BindingKeys() []key.Binding {
+	return layout.KeyMapToSlice(toolsKeys)
+}
+
+func NewToolsDialogCmp() ToolsDialog {
+	list := utilComponents.NewSimpleList[toolItem](
+		[]toolItem{},
+		maxVisibleTools,
+		"No tools available",
+		true,
+	)
+	
+	return &toolsDialogCmp{
+		list: list,
+	}
+}