feat(office): table detail panes and Alt+1/2/3 layout toggles

Add spreadsheet-style list, split detail pane with forms and document preview,
and Alt+1/2/3 to show/hide panes with even width distribution.

Co-authored-by: Cursor <cursoragent@cursor.com>

cmd/office/ui/entityform.go

@@ -0,0 +1,223 @@
+package ui
+
+import (
+	"strings"
+
+	"github.com/charmbracelet/bubbles/textinput"
+	"github.com/charmbracelet/bubbles/textarea"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+	"github.com/eslider/go-onlyoffice/cmd/office/model"
+)
+
+type entityField int
+
+const (
+	entityFieldPrimary entityField = iota
+	entityFieldSecondary
+)
+
+// EntityForm is the top section of the detail pane for editable entities.
+type EntityForm struct {
+	active         bool
+	kind           model.Kind
+	itemID         string
+	primaryLabel   string
+	secondaryLabel string
+	readOnly       bool
+	primary        textinput.Model
+	secondary      textarea.Model
+	field          entityField
+	focused        bool
+	dirty          bool
+	width          int
+	height         int
+	styles         entityFormStyles
+}
+
+type entityFormStyles struct {
+	header   lipgloss.Style
+	label    lipgloss.Style
+	labelAct lipgloss.Style
+}
+
+func newEntityFormStyles() entityFormStyles {
+	return entityFormStyles{
+		header:   lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("252")),
+		label:    lipgloss.NewStyle().Foreground(lipgloss.Color("241")),
+		labelAct: lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("255")).Background(lipgloss.Color("62")),
+	}
+}
+
+func newEntityForm() EntityForm {
+	primary := textinput.New()
+	primary.CharLimit = 512
+	primary.Prompt = "> "
+	secondary := textarea.New()
+	secondary.ShowLineNumbers = false
+	secondary.CharLimit = 8000
+	secondary.Prompt = "> "
+	return EntityForm{
+		primary:  primary,
+		secondary: secondary,
+		field:    entityFieldPrimary,
+		styles:   newEntityFormStyles(),
+	}
+}
+
+func (f *EntityForm) Active() bool { return f.active }
+
+func (f *EntityForm) ItemID() string { return f.itemID }
+
+func (f *EntityForm) Primary() string { return f.primary.Value() }
+
+func (f *EntityForm) Secondary() string { return f.secondary.Value() }
+
+func (f *EntityForm) MarkClean() { f.dirty = false }
+
+func (f *EntityForm) Load(kind model.Kind, itemID string, fields model.FormFields) {
+	f.active = true
+	f.kind = kind
+	f.itemID = itemID
+	f.primaryLabel = fields.PrimaryLabel
+	f.secondaryLabel = fields.SecondaryLabel
+	f.readOnly = fields.ReadOnly
+	f.primary.SetValue(fields.Primary)
+	f.secondary.SetValue(fields.Secondary)
+	f.dirty = false
+	f.field = entityFieldPrimary
+	f.applyFocus()
+	f.layoutFields()
+}
+
+func (f *EntityForm) Clear() {
+	f.active = false
+	f.itemID = ""
+	f.primary.SetValue("")
+	f.secondary.SetValue("")
+	f.dirty = false
+	f.primary.Blur()
+	f.secondary.Blur()
+}
+
+func (f *EntityForm) SetFocused(on bool) {
+	f.focused = on && f.active
+	if f.focused {
+		f.applyFocus()
+	} else {
+		f.primary.Blur()
+		f.secondary.Blur()
+	}
+}
+
+func (f *EntityForm) SetSize(w, h int) {
+	if w < 12 {
+		w = 12
+	}
+	if h < 6 {
+		h = 6
+	}
+	f.width = w
+	f.height = h
+	f.layoutFields()
+}
+
+func (f *EntityForm) layoutFields() {
+	if f.width == 0 {
+		return
+	}
+	inner := f.width - 2
+	if inner < 8 {
+		inner = 8
+	}
+	f.primary.Width = inner
+	secH := f.height - 6
+	if secH < 3 {
+		secH = 3
+	}
+	f.secondary.SetWidth(inner)
+	f.secondary.SetHeight(secH)
+}
+
+func (f *EntityForm) FocusNext() {
+	if f.field < entityFieldSecondary {
+		f.field++
+	}
+	f.applyFocus()
+}
+
+func (f *EntityForm) FocusPrev() {
+	if f.field > entityFieldPrimary {
+		f.field--
+	}
+	f.applyFocus()
+}
+
+func (f *EntityForm) applyFocus() {
+	if f.readOnly {
+		f.primary.Blur()
+		f.secondary.Blur()
+		return
+	}
+	switch f.field {
+	case entityFieldPrimary:
+		f.primary.Focus()
+		f.secondary.Blur()
+	default:
+		f.primary.Blur()
+		f.secondary.Focus()
+	}
+}
+
+func (f *EntityForm) Update(msg tea.Msg) tea.Cmd {
+	if !f.active || !f.focused || f.readOnly {
+		return nil
+	}
+	var cmd tea.Cmd
+	switch f.field {
+	case entityFieldPrimary:
+		f.primary, cmd = f.primary.Update(msg)
+	default:
+		f.secondary, cmd = f.secondary.Update(msg)
+	}
+	if _, ok := msg.(tea.KeyMsg); ok {
+		f.dirty = true
+	}
+	return cmd
+}
+
+func (f EntityForm) View() string {
+	if !f.active {
+		return ""
+	}
+	header := f.styles.header.Render(model.KindHeading(f.kind, f.itemID))
+	pLabel := f.styles.label.Render(f.primaryLabel)
+	if f.focused && f.field == entityFieldPrimary && !f.readOnly {
+		pLabel = f.styles.labelAct.Render(f.primaryLabel)
+	}
+	sLabel := f.styles.label.Render(f.secondaryLabel)
+	if f.focused && f.field == entityFieldSecondary && !f.readOnly {
+		sLabel = f.styles.labelAct.Render(f.secondaryLabel)
+	}
+	ro := ""
+	if f.readOnly {
+		ro = lipgloss.NewStyle().Foreground(lipgloss.Color("241")).Render(" (read-only)") + "\n"
+	}
+	return strings.Join([]string{
+		header + ro,
+		pLabel,
+		f.primary.View(),
+		"",
+		sLabel,
+		f.secondary.View(),
+	}, "\n")
+}
+
+func entityFormBlinkCmd() tea.Cmd {
+	return tea.Batch(textinput.Blink, textarea.Blink)
+}
+
+// NewEntityFormForTest exposes a form for unit tests.
+func NewEntityFormForTest() EntityForm {
+	return newEntityForm()
+}