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/view.go

@@ -542,6 +542,14 @@ func (m Model) routerRows(w, h int) []string {
 			}
 		case "narration", "stage":
 			rows = append(rows, t.span(e.Content, t.P.Dim))
+		case "action":
+			// Inline "external feedback" row: a side-effecting action (tool call, write/edit,
+			// approval, grant) surfaced in the conversation flow. Muted via actionsHidden.
+			if m.actionsHidden {
+				break
+			}
+			icon := lipgloss.NewStyle().Foreground(t.P.Accent2).Background(t.P.Bg).Render(e.Icon)
+			rows = append(rows, "  "+icon+" "+t.span(e.Content, t.P.Dim))
 		}
 	}
 	// With a selection, scroll so the selected message is visible (top-aligned, clamped