Motivation

• Surface human-friendly step titles when step controls are shown so users can see the current step label in the toolbar.
• Allow consumers to force the toolbar to render even when layer/step controls would otherwise be hidden.
• Provide the same step-title behavior for both SVG (InteractiveGraphics) and canvas (InteractiveGraphicsCanvas) variants.

Description

• Added stepMetadata?: Array<{ title: string }> and alwaysShowToolbar?: boolean props to InteractiveGraphics and InteractiveGraphicsCanvas.
• Adjusted toolbar visibility logic to use alwaysShowToolbar and to compute a stepTitle from stepMetadata for the selected step (including the last step).
• Reworked toolbar layout to be a flex row and render the current step title right-aligned when available.
• Kept existing step/filter/label controls intact and gated the canvas toolbar so label control can still be shown when requested.

Testing

• Ran TypeScript typecheck with bunx tsc --noEmit and it succeeded.
• Ran formatter with bun run format and it completed successfully.

Codex Task