feat: TUI Key & Snippet Management - Task 19

- KeyListTab: view/add/edit/delete SSH keys (Ctrl+K from host list)
- KeyFormTab: add/edit key form with name, type, private key, passphrase
- SnippetListTab: view/add/edit/delete snippets (Ctrl+P from host list)
- SnippetFormTab: add/edit snippet form with name, command, description, tags
- Updated status bar with new hints
- Save/delete commands for both key pairs and snippets

pkg/tui/snippet_form_tab.go

@@ -0,0 +1,233 @@
+package tui
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/charmbracelet/bubbles/textinput"
+	tea "github.com/charmbracelet/bubbletea"
+
+	"git.tukangketik.id/swanadiva/hostkeeper/internal/models"
+)
+
+type snippetFormMode int
+
+const (
+	snippetFormAdd snippetFormMode = iota
+	snippetFormEdit
+)
+
+type snippetFieldID int
+
+const (
+	snippetFieldName snippetFieldID = iota
+	snippetFieldCommand
+	snippetFieldDescription
+	snippetFieldTags
+	snippetFieldCount
+)
+
+var snippetFieldLabels = map[snippetFieldID]string{
+	snippetFieldName:        "Name",
+	snippetFieldCommand:     "Command",
+	snippetFieldDescription: "Description",
+	snippetFieldTags:        "Tags (comma-separated)",
+}
+
+// SnippetFormTab is a tab for adding/editing command snippets
+type SnippetFormTab struct {
+	mode    snippetFormMode
+	editing *models.Snippet
+	dataDir string
+
+	inputs []textinput.Model
+	focus  snippetFieldID
+	width  int
+	height int
+
+	err   error
+	saved bool
+}
+
+func NewAddSnippetFormTab(dataDir string) *SnippetFormTab {
+	return newSnippetFormTab(snippetFormAdd, nil, dataDir)
+}
+
+func NewEditSnippetFormTab(snippet *models.Snippet, dataDir string) *SnippetFormTab {
+	return newSnippetFormTab(snippetFormEdit, snippet, dataDir)
+}
+
+func newSnippetFormTab(mode snippetFormMode, sn *models.Snippet, dataDir string) *SnippetFormTab {
+	inputs := make([]textinput.Model, snippetFieldCount)
+	for i := range inputs {
+		inputs[i] = textinput.New()
+		inputs[i].Prompt = ""
+	}
+
+	inputs[snippetFieldName].Placeholder = "Check logs"
+	inputs[snippetFieldCommand].Placeholder = "journalctl -u nginx --no-pager -n 100"
+	inputs[snippetFieldDescription].Placeholder = "View last 100 nginx log entries"
+	inputs[snippetFieldTags].Placeholder = "nginx,logs,troubleshooting"
+
+	if mode == snippetFormEdit && sn != nil {
+		inputs[snippetFieldName].SetValue(sn.Name)
+		inputs[snippetFieldCommand].SetValue(sn.Command)
+		inputs[snippetFieldDescription].SetValue(sn.Description)
+		inputs[snippetFieldTags].SetValue(strings.Join(sn.Tags, ","))
+	}
+
+	inputs[snippetFieldName].Focus()
+	inputs[snippetFieldName].Prompt = "> "
+
+	return &SnippetFormTab{
+		mode:    mode,
+		editing: sn,
+		dataDir: dataDir,
+		inputs:  inputs,
+	}
+}
+
+func (t *SnippetFormTab) Name() string {
+	if t.mode == snippetFormEdit {
+		return "Edit Snippet"
+	}
+	return "Add Snippet"
+}
+
+func (t *SnippetFormTab) Init() tea.Cmd {
+	return textinput.Blink
+}
+
+func (t *SnippetFormTab) Update(msg tea.Msg) (Tab, tea.Cmd) {
+	if t.saved {
+		return t, nil
+	}
+
+	switch msg := msg.(type) {
+	case tea.WindowSizeMsg:
+		t.width = msg.Width
+		t.height = msg.Height
+
+	case tea.KeyMsg:
+		switch msg.String() {
+		case "esc":
+			return t, func() tea.Msg { return closeFormMsg{} }
+
+		case "enter":
+			if t.focus == snippetFieldCount-1 {
+				return t.submit()
+			}
+			t.nextField()
+
+		case "tab", "down":
+			t.nextField()
+
+		case "shift+tab", "up":
+			t.prevField()
+
+		default:
+			if msg.String() == "ctrl+s" {
+				return t.submit()
+			}
+			t.inputs[t.focus].Update(msg)
+		}
+	}
+
+	return t, nil
+}
+
+func (t *SnippetFormTab) nextField() {
+	t.inputs[t.focus].Blur()
+	t.inputs[t.focus].Prompt = ""
+	t.focus++
+	if t.focus >= snippetFieldCount {
+		t.focus = snippetFieldCount - 1
+	}
+	t.inputs[t.focus].Focus()
+	t.inputs[t.focus].Prompt = "> "
+}
+
+func (t *SnippetFormTab) prevField() {
+	t.inputs[t.focus].Blur()
+	t.inputs[t.focus].Prompt = ""
+	t.focus--
+	if t.focus < 0 {
+		t.focus = 0
+	}
+	t.inputs[t.focus].Focus()
+	t.inputs[t.focus].Prompt = "> "
+}
+
+func (t *SnippetFormTab) submit() (Tab, tea.Cmd) {
+	name := t.inputs[snippetFieldName].Value()
+	command := t.inputs[snippetFieldCommand].Value()
+
+	if name == "" || command == "" {
+		t.err = fmt.Errorf("name and command are required")
+		return t, nil
+	}
+
+	var tags []string
+	if tagStr := t.inputs[snippetFieldTags].Value(); tagStr != "" {
+		for _, tag := range strings.Split(tagStr, ",") {
+			if trimmed := strings.TrimSpace(tag); trimmed != "" {
+				tags = append(tags, trimmed)
+			}
+		}
+	}
+
+	var sn *models.Snippet
+	if t.mode == snippetFormEdit && t.editing != nil {
+		sn = t.editing
+		sn.Name = name
+		sn.Command = command
+		sn.Description = t.inputs[snippetFieldDescription].Value()
+		sn.Tags = tags
+	} else {
+		sn = &models.Snippet{
+			Name:        name,
+			Command:     command,
+			Description: t.inputs[snippetFieldDescription].Value(),
+			Tags:        tags,
+		}
+	}
+
+	t.saved = true
+	return t, saveSnippetCmd(sn, t.dataDir)
+}
+
+func (t *SnippetFormTab) View() string {
+	var b strings.Builder
+
+	title := "Add Snippet"
+	if t.mode == snippetFormEdit {
+		title = "Edit Snippet"
+	}
+	b.WriteString(AppTitleStyle.Render(title))
+	b.WriteString("\n\n")
+
+	if t.err != nil {
+		b.WriteString(ErrorStyle.Render(fmt.Sprintf("Error: %v", t.err)))
+		b.WriteString("\n\n")
+	}
+
+	for i := snippetFieldID(0); i < snippetFieldCount; i++ {
+		input := t.inputs[i]
+		label := snippetFieldLabels[i]
+		style := SubtitleStyle
+		if i == t.focus {
+			style = HighlightStyle
+		}
+		b.WriteString(style.Render(label + ":"))
+		b.WriteString("\n  ")
+		b.WriteString(input.View())
+		b.WriteString("\n\n")
+	}
+
+	b.WriteString(SubtitleStyle.Render(
+		"↑↓: navigate  Enter: next  Ctrl+S: save  Esc: cancel"))
+
+	return b.String()
+}
+
+func (t *SnippetFormTab) Close() {}