feat(tui-go): inline action rows in the OUTPUT transcript

Surface side-effecting ("external feedback") events in the conversation
flow, opencode-style, instead of only in the EVENTS side log.

- New RouterEntry role "action" (glyph + text) appended at arrival so it
  interleaves with chat turns by order. Rendered dim with an accent gutter
  glyph; the EVENTS panel still carries the full stream.
- Surfaced: tool start (⏵), tool done (✓ / ✎ wrote <path> (+a −b) for a
  diff), tool failed (✗), rejected (✕ blocked), approval resolved
  (⌘ approved / ✕ rejected, noting "· via grant" on a grant auto-approve),
  and grant create/revoke (⊞ / ⊟ · scope). ApprovalResolved names no tool
  on the wire, so the tool is recovered from the pending queue before the
  gate is dropped.
- Toggle: "inline actions" palette command flips actionsHidden (rows are
  always recorded, gated at render, so toggling reveals history); persisted
  in tui-prefs.json. prefs.go refactored to load/mutate/save so the new
  field and statusbarHidden no longer clobber each other.
- demo.go: "actions" preview kind.

go build / vet / test green; rendered the flow via cmd/preview.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/tui-go/internal/app/update.go

@@ -760,7 +760,9 @@ func (m Model) handleOverlayKey(k tea.KeyMsg) (tea.Model, tea.Cmd) {
 			}
 		case k.Type == tea.KeyEnter || runeIs(k, "x"):
 			if m.grantIndex >= 0 && m.grantIndex < len(m.grants) {
-				m.client.Send(protocol.RevokeGrant(m.grants[m.grantIndex].GrantID))
+				g := m.grants[m.grantIndex]
+				m.client.Send(protocol.RevokeGrant(g.GrantID))
+				m.appendAction(m.selectedID, "⊟", "revoked "+g.ToolName+" · "+strings.ToLower(g.Scope))
 				// The server replies with a fresh grant.list, which refreshes m.grants.
 			}
 		case runeIs(k, "G"):
@@ -829,6 +831,7 @@ func (m Model) applyGrantScope() (tea.Model, tea.Cmd) {
 	scope := opts[idx].wire
 	m.client.Send(protocol.CreateGrant(p.SessionID, scope, []string{p.Tier}, "granted via TUI ("+scope+")", p.ToolName))
 	m.client.Send(protocol.ApprovalResponse(p.RequestID, "APPROVE", nil))
+	m.appendAction(p.SessionID, "⊞", "granted "+p.ToolName+" · "+strings.ToLower(scope))
 	if s := m.session(p.SessionID); s != nil {
 		s.removeApproval(p.RequestID)
 	}
@@ -969,6 +972,7 @@ func paletteCommands() []paletteCmd {
 		{"config", "g", "edit config", "view / change correx settings"},
 		{"grants", "G", "grants", "view / revoke standing grants"},
 		{"statusbar", "", "status bar", "show / hide status-bar segments"},
+		{"actions", "", "inline actions", "show / hide tool & action rows in output"},
 		{"mode", "s", "toggle mode", "switch chat / steering"},
 		{"cancel", "c", "cancel session", "stop the selected session"},
 		{"back", "l", "back to list", "leave the current session"},
@@ -1016,6 +1020,8 @@ func (m Model) execPalette(id string) (tea.Model, tea.Cmd) {
 	case "statusbar":
 		m.overlay = OverlayStatusbar
 		m.sbIndex = 0
+	case "actions":
+		m.toggleInlineActions()
 	case "mode":
 		m.cycleChatMode()
 	case "cancel":
@@ -1288,6 +1294,22 @@ func (m *Model) appendRouter(sid string, e RouterEntry) {
 	m.routerMessages[sid] = append(m.routerMessages[sid], e)
 }
 
+// appendAction adds an inline "external feedback" row (a tool call, write/edit, approval, or
+// grant) to a session's OUTPUT transcript, interleaved with chat turns by arrival order. The
+// rows are always recorded; rendering is gated on actionsHidden so toggling reveals history.
+func (m *Model) appendAction(sid, icon, text string) {
+	if sid == "" {
+		return
+	}
+	m.routerMessages[sid] = append(m.routerMessages[sid], RouterEntry{Role: "action", Icon: icon, Content: text})
+}
+
+// toggleInlineActions flips the inline-action-rows visibility and persists it.
+func (m *Model) toggleInlineActions() {
+	m.actionsHidden = !m.actionsHidden
+	saveInlineActionsHidden(m.actionsHidden)
+}
+
 // transcriptNavUser moves the transcript selection to the previous (dir<0) or next
 // (dir>0) USER message — "go back to my previous message". From no selection, ctrl+↑
 // grabs the most recent user message; ctrl+↓ past the last one drops back to tail-follow.