interface WiStepContent {
  wiStepContentId:      number;           // negative = unsaved new item
  wiStepId:             number;
  slNo:                 number;           // sort order within zone (1-based)
  contentType:          ContentType;      // enum 0–10
  contentSource:        ContentSource;    // enum 0–3 (default: 0 = Inline)
  contentRef?:          string;           // URL, HTML, or JSON string — varies by type
  mediaCaption?:        string;           // alt text / label for media blocks
  displayDurationSecs:  number;           // 0 = no auto-advance
  loopMedia:            0 | 1;           // video loop flag
  zoomRegion?:          WiZoomRegion;     // Image only: { x, y, w, h } percentages
  applicableModelIds?:  number[] | null;  // product model filter (null = all models)
  isActive:             0 | 1;
  // Container assignment
  containerId?:         number;
  containerType?:       WiContainerType;
  containerLabel?:      string;
  zoneName?:            string;           // e.g. "left", "tab-1", "section-2"
  blockInContainerPos?: number;           // position within zone
}

interface WiZoomRegion {
  x: number;   // left offset % (0–100)
  y: number;   // top offset %
  w: number;   // width %
  h: number;   // height %
}

interface WiStep {
  wiStepId:         number;
  wiId:             number;
  wiSectionId:      number;
  slNo:             number;
  stepDisplayNo?:   string;          // e.g. "1.1", "2.3"
  stepTitle:        string;
  warningLevel:     WarningLevel;    // 0=None, 1=Caution, 2=Warning, 3=Danger
  stdDurationSecs:  number;
  toolsRequired?:   WiTool[];
  isOptional:       0 | 1;
  requireSignOff:   0 | 1;
  autoAdvanceSecs:  number;          // 0 = manual advance
  isActive:         0 | 1;
  contents?:        WiStepContent[]; // flat list — backward compat only
  containers?:     WiStepContainer[];
}

interface WiStepContainer {
  containerId:      number;
  containerType:    WiContainerType;
  containerLabel?:  string;
  blocks:           WiStepContent[];
}