Files
correx/apps/tui-go/internal/app/overlays.go
T
kami 3600ec6897 feat(tui): surface plane-2 rationale in the approval band
The plane-2 tool-call assessor records verified preconditions
("[PATH_OUTSIDE_WORKSPACE] …") and the server already ships them in
RiskSummaryDto.rationale, but the Go TUI's RiskSummaryDto had no
Rationale field — so the justification was silently dropped at decode
and the gate showed only an opaque tier.

Decode the rationale, carry it on Approval, and render it under the
header in the approval band (warn-marked, above the diff). This closes
the last deferred item of the plane-2 slice-1 plan: the assessment
surfaced to the approval UX. Golden test pins the rationale decode.
2026-06-03 00:30:26 +04:00

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package app
import (
"sort"
"strings"
"github.com/charmbracelet/lipgloss"
)
// center composites a modal over a scrim-filled screen. Immediate-mode: the modal
// is recomputed from state every frame, so there is no separate show/restore path
// to desync (the "diff won't come back" bug class can't occur here).
func (m Model) center(modal string) string {
return lipgloss.Place(m.width, m.height, lipgloss.Center, lipgloss.Center, modal,
lipgloss.WithWhitespaceBackground(m.theme.P.BgDeep),
lipgloss.WithWhitespaceForeground(m.theme.P.BgDeep))
}
func (m Model) modalWidth() int {
w := m.width * 70 / 100
if w > 92 {
w = 92
}
if w < 24 {
w = 24
}
return w
}
func (m Model) renderOverlay(base string) string {
switch m.overlay {
case OverlayPalette:
return m.center(m.paletteModal())
case OverlayEventInspector:
return m.center(m.eventInspectorModal())
case OverlayDiff:
return m.center(m.diffModal())
case OverlayToolPalette:
return m.center(m.toolPaletteModal())
case OverlayModels:
return m.center(m.modelsModal())
}
return base
}
func (m Model) titleLine(text string) string {
t := m.theme
return lipgloss.NewStyle().Foreground(t.P.Accent).Background(t.P.BgPanel).Bold(true).Render(text)
}
func mbg(t Theme, s string, fg lipgloss.Color) string {
return lipgloss.NewStyle().Foreground(fg).Background(t.P.BgPanel).Render(s)
}
// approvalBandHeight sizes the docked approval band to its diff, capped so it
// never crowds out the session above (longer diffs spill to the ^x fullscreen
// view). Layout: 2 borders + header + blank + diff rows + blank + action row.
func (m Model) approvalBandHeight() int {
rows, rat := 0, 0
if s := m.session(m.selectedID); s != nil && s.Pending != nil {
rows = len(parseUnifiedDiff(s.Pending.Preview))
if n := len(s.Pending.Rationale); n > 0 {
rat = n + 1 // rationale lines + trailing blank
}
}
h := 2 + 1 + 1 + rat + rows + 1 + 1
if maxH := m.height * 55 / 100; h > maxH {
h = maxH
}
if h < 10 {
h = 10
}
if hardMax := m.height - statusH - footerH - 3; hardMax > 4 && h > hardMax {
h = hardMax
}
return h
}
// renderApprovalBand draws the approval gate as a full-width band (in place of
// the input bar): tool/tier/risk header, a two-column old|new diff, and the
// action row. It never floats over the rest of the UI.
func (m Model) renderApprovalBand(h int) string {
t := m.theme
s := m.session(m.selectedID)
if s == nil || s.Pending == nil {
return m.renderInput()
}
a := s.Pending
textW := m.width - 4 // box borders (2) + side padding (2)
riskColor := t.P.Warn
switch strings.ToUpper(a.Risk) {
case "HIGH", "CRITICAL":
riskColor = t.P.Bad
case "LOW":
riskColor = t.P.OK
}
leftHdr := lipgloss.NewStyle().Foreground(t.P.Accent).Background(t.P.Bg).Bold(true).Render("→ ") +
t.span(a.ToolName, t.P.FgStrong)
if tgt := diffTarget(a.Preview); tgt != "" {
leftHdr += t.span(" "+tgt, t.P.Dim)
}
rightHdr := t.span("tier ", t.P.Faint) + t.span(a.Tier, t.P.Accent2) +
t.span(" · risk ", t.P.Faint) +
lipgloss.NewStyle().Foreground(riskColor).Background(t.P.Bg).Bold(true).Render(strings.ToUpper(a.Risk))
innerH := h - 2
ratBlock := 0
if len(a.Rationale) > 0 {
ratBlock = len(a.Rationale) + 1 // rationale lines + trailing blank
}
diffH := innerH - 4 - ratBlock // header, blank, blank, action row, + rationale block
if diffH < 1 {
diffH = 1
}
rows := parseUnifiedDiff(a.Preview)
body := make([]string, 0, innerH)
body = append(body, m.justify(leftHdr, rightHdr, textW, t.P.Bg), "")
for _, r := range a.Rationale {
marker := lipgloss.NewStyle().Foreground(t.P.Warn).Background(t.P.Bg).Render("▲ ")
body = append(body, marker+t.span(truncate(r, textW-2), t.P.Dim))
}
if len(a.Rationale) > 0 {
body = append(body, "")
}
diffStart := len(body)
body = append(body, m.renderSplitDiff(rows, textW, diffH, 0)...)
for len(body) < diffStart+diffH {
body = append(body, "")
}
body = append(body, "", m.approvalActions())
return t.box("permission required", body, m.width, h, true)
}
// approvalActions renders the action row of the approval band, or the live steer
// note when the operator is composing one.
func (m Model) approvalActions() string {
t := m.theme
if m.steering {
note, fg := m.steerBuffer, t.P.FgStrong
if note == "" {
note, fg = "(steer note — enter to send, esc to cancel)", t.P.Faint
}
return t.span("steer ", t.P.Faint) + t.span(note, fg) +
lipgloss.NewStyle().Foreground(t.P.Accent).Background(t.P.Bg).Render("▏")
}
hint := func(k, l string) string {
return lipgloss.NewStyle().Foreground(t.P.Accent).Background(t.P.Bg).Bold(true).Render(k) +
t.span(" "+l, t.P.Faint)
}
parts := []string{hint("a", "approve"), hint("A", "auto"), hint("s", "steer"),
hint("r", "reject"), hint("^x", "fullscreen"), hint("esc", "later")}
return strings.Join(parts, t.span(" ", t.P.Faint))
}
// diffBodyHeight is the number of diff lines visible in the diff modal body.
func (m Model) diffBodyHeight() int {
h := m.height * 70 / 100
if h < 8 {
h = 8
}
return h - 6
}
// diffMaxScroll is the largest scroll offset that still fills the body with
// diff rows, keeping the last page anchored to the bottom of the modal.
func (m Model) diffMaxScroll() int {
rows := parseUnifiedDiff(m.currentDiff())
max := len(rows) - m.diffBodyHeight()
if max < 0 {
max = 0
}
return max
}
func (m Model) diffModal() string {
t := m.theme
w := m.modalWidth()
bodyH := m.diffBodyHeight()
diff := m.currentDiff()
rows := parseUnifiedDiff(diff)
off := m.diffScrollOffset
if off > m.diffMaxScroll() {
off = m.diffMaxScroll()
}
if off < 0 {
off = 0
}
var b strings.Builder
b.WriteString(m.titleLine("diff"))
if tgt := diffTarget(diff); tgt != "" {
b.WriteString(mbg(t, " "+tgt, t.P.Dim))
}
b.WriteString(mbg(t, " ("+itoa(len(rows))+" rows)", t.P.Faint) + "\n\n")
for _, ln := range m.renderSplitDiff(rows, w-6, bodyH, off) {
b.WriteString(ln + "\n")
}
b.WriteString("\n" + modalHints(t, [][2]string{{"↑↓", "scroll"}, {"^x/esc", "close"}}))
modal := t.Overlay.Width(w).Render(b.String())
return m.center(modal)
}
func (m Model) eventInspectorModal() string {
t := m.theme
w := m.modalWidth()
evs := m.currentEvents()
var b strings.Builder
b.WriteString(m.titleLine("event inspector") + "\n\n")
if len(evs) == 0 {
b.WriteString(mbg(t, "no events", t.P.Faint))
}
// Budget the plain detail so the styled row never needs ANSI-aware truncation
// (truncating a styled string would cut through escape codes and corrupt it).
detailBudget := (w - 6) - (2 + 9 + 11 + 1 + 18 + 1)
if detailBudget < 4 {
detailBudget = 4
}
for i, e := range evs {
cat := inferCategory(e.Type)
marker := mbg(t, " ", t.P.BgPanel)
fg := t.P.Fg
if i == m.overlayEventIdx {
marker = lipgloss.NewStyle().Foreground(t.P.Accent).Background(t.P.BgPanel).Render("▸ ")
fg = t.P.FgStrong
}
row := marker + mbg(t, padRaw(e.Time, 8)+" ", t.P.Faint) +
lipgloss.NewStyle().Foreground(t.categoryColor(cat)).Background(t.P.BgPanel).Render(padRaw("["+cat+"]", 11)) + " " +
lipgloss.NewStyle().Foreground(fg).Background(t.P.BgPanel).Render(padRaw(e.Type, 18)) +
mbg(t, " "+truncate(e.Detail, detailBudget), t.P.Dim)
b.WriteString(row + "\n")
}
b.WriteString("\n" + modalHints(t, [][2]string{{"↑↓", "select"}, {"esc", "close"}}))
modal := t.Overlay.Width(w).Render(b.String())
return m.center(modal)
}
func (m Model) paletteModal() string {
t := m.theme
w := m.modalWidth()
cmds := m.filteredPalette()
var b strings.Builder
b.WriteString(m.titleLine("command palette") + "\n\n")
// filter input line
filter := m.paletteFilter
caret := mbg(t, " ", t.P.BgPanel)
if m.caretVisible() {
caret = lipgloss.NewStyle().Foreground(t.P.Accent).Background(t.P.BgPanel).Render("▏")
}
prompt := lipgloss.NewStyle().Foreground(t.P.Accent).Background(t.P.BgPanel).Render(" ")
if filter == "" {
b.WriteString(prompt + caret + mbg(t, "type to filter…", t.P.Faint) + "\n\n")
} else {
b.WriteString(prompt + mbg(t, filter, t.P.FgStrong) + caret + "\n\n")
}
if len(cmds) == 0 {
b.WriteString(mbg(t, " no matching commands", t.P.Faint) + "\n")
}
for i, c := range cmds {
marker := mbg(t, " ", t.P.BgPanel)
titleFg := t.P.Fg
if i == m.paletteIndex {
marker = lipgloss.NewStyle().Foreground(t.P.Accent).Background(t.P.BgPanel).Render("▌ ")
titleFg = t.P.FgStrong
}
b.WriteString(marker +
lipgloss.NewStyle().Foreground(titleFg).Background(t.P.BgPanel).Render(padRaw(c.title, 18)) +
mbg(t, " "+c.hint, t.P.Faint) + "\n")
}
b.WriteString("\n" + modalHints(t, [][2]string{{"↑↓", "select"}, {"enter", "run"}, {"esc", "close"}}))
modal := t.Overlay.Width(w).Render(b.String())
return m.center(modal)
}
func (m Model) toolPaletteModal() string {
t := m.theme
w := m.modalWidth()
s := m.session(m.selectedID)
var b strings.Builder
b.WriteString(m.titleLine("tool palette") + "\n\n")
if s == nil || len(s.ToolsByStage) == 0 {
b.WriteString(mbg(t, "no tool manifest for this session", t.P.Faint) + "\n")
} else {
stages := make([]string, 0, len(s.ToolsByStage))
for st := range s.ToolsByStage {
stages = append(stages, st)
}
sort.Strings(stages)
for _, st := range stages {
label := mbg(t, st, t.P.Accent2)
if st == s.CurrentStage {
label += lipgloss.NewStyle().Foreground(t.P.Accent).Background(t.P.BgPanel).Render(" ◂ current")
}
b.WriteString(label + "\n")
for _, tool := range s.ToolsByStage[st] {
tier := lipgloss.NewStyle().Foreground(tierColor(t, tool.Tier)).Background(t.P.BgPanel).Render("T" + itoa(tool.Tier))
b.WriteString(mbg(t, " "+padRaw(tool.Name, 22), t.P.Fg) + tier + "\n")
}
}
}
b.WriteString("\n" + modalHints(t, [][2]string{{"t/esc", "close"}}))
modal := t.Overlay.Width(w).Render(b.String())
return m.center(modal)
}
func (m Model) modelsModal() string {
t := m.theme
w := m.modalWidth()
var b strings.Builder
b.WriteString(m.titleLine("models") + "\n\n")
if g := m.gaugeText(); g != "" {
b.WriteString(mbg(t, g, t.P.Faint) + "\n\n")
}
if len(m.availableModels) == 0 {
b.WriteString(mbg(t, " model management not enabled", t.P.Faint) + "\n")
}
for i, id := range m.availableModels {
marker := mbg(t, " ", t.P.BgPanel)
nameFg := t.P.Fg
if i == m.modelsIndex {
marker = lipgloss.NewStyle().Foreground(t.P.Accent).Background(t.P.BgPanel).Render("▌ ")
nameFg = t.P.FgStrong
}
line := marker + lipgloss.NewStyle().Foreground(nameFg).Background(t.P.BgPanel).Render(padRaw(id, 28))
if id == m.currentModel {
line += lipgloss.NewStyle().Foreground(t.P.Accent2).Background(t.P.BgPanel).Render(" ◂ resident")
}
b.WriteString(line + "\n")
}
b.WriteString("\n" + modalHints(t, [][2]string{{"↑↓", "select"}, {"enter", "swap"}, {"c", "clear pin"}, {"esc", "close"}}))
modal := t.Overlay.Width(w).Render(b.String())
return m.center(modal)
}
func tierColor(t Theme, tier int) lipgloss.Color {
switch {
case tier >= 3:
return t.P.Bad
case tier == 2:
return t.P.Warn
case tier == 1:
return t.P.Accent2
default:
return t.P.OK
}
}
func modalHints(t Theme, pairs [][2]string) string {
parts := make([]string, 0, len(pairs))
for _, p := range pairs {
parts = append(parts,
lipgloss.NewStyle().Foreground(t.P.Accent).Background(t.P.BgPanel).Bold(true).Render(p[0])+
mbg(t, " "+p[1], t.P.Faint))
}
return strings.Join(parts, mbg(t, " ", t.P.Faint))
}
func truncate(s string, w int) string {
if len([]rune(s)) <= w {
return s
}
r := []rune(s)
if w < 1 {
return ""
}
return string(r[:w-1]) + "…"
}